* spontaneous crash with "ext4: move ext4 bmap to use iomap infrastructure"
@ 2020-04-01 12:38 Qian Cai
2020-04-01 14:41 ` Ritesh Harjani
2020-04-03 11:26 ` Qian Cai
0 siblings, 2 replies; 6+ messages in thread
From: Qian Cai @ 2020-04-01 12:38 UTC (permalink / raw)
To: Ritesh Harjani; +Cc: Jan Kara, Darrick J. Wong, linux-ext4, LKML
It is not always reproducible so far, but it start to show up on today’s linux-next. Look
Trough the commits and noticed this recent one matched the new call traces,
ac58e4fb03f9 (“ext4: move ext4 bmap to use iomap infrastructure")
Thought?
[ 206.744625][T13224] LTP: starting fallocate04
[ 207.601583][T27684] /dev/zero: Can't open blockdev
[ 208.674301][T27684] EXT4-fs (loop0): mounting ext3 file system using the ext4 subsystem
[ 208.680347][T27684] BUG: Unable to handle kernel instruction fetch (NULL pointer?)
[ 208.680383][T27684] Faulting instruction address: 0x00000000
[ 208.680406][T27684] Oops: Kernel access of bad area, sig: 11 [#1]
[ 208.680439][T27684] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=256 DEBUG_PAGEALLOC NUMA PowerNV
[ 208.680474][T27684] Modules linked in: ext4 crc16 mbcache jbd2 loop kvm_hv kvm ip_tables x_tables xfs sd_mod bnx2x ahci libahci mdio tg3 libata libphy firmware_class dm_mirror dm_region_hash dm_log dm_mod
[ 208.680576][T27684] CPU: 117 PID: 27684 Comm: fallocate04 Tainted: G W 5.6.0-next-20200401+ #288
[ 208.680614][T27684] NIP: 0000000000000000 LR: c0080000102c0048 CTR: 0000000000000000
[ 208.680657][T27684] REGS: c000200361def420 TRAP: 0400 Tainted: G W (5.6.0-next-20200401+)
[ 208.680700][T27684] MSR: 900000004280b033 <SF,HV,VEC,VSX,EE,FP,ME,IR,DR,RI,LE> CR: 42022228 XER: 20040000
[ 208.680760][T27684] CFAR: c00800001032c494 IRQMASK: 0
[ 208.680760][T27684] GPR00: c0000000005ac3f8 c000200361def6b0 c00000000165c200 c00020107dae0bd0
[ 208.680760][T27684] GPR04: 0000000000000000 0000000000000400 0000000000000000 0000000000000000
[ 208.680760][T27684] GPR08: c000200361def6e8 c0080000102c0040 000000007fffffff c000000001614e80
[ 208.680760][T27684] GPR12: 0000000000000000 c000201fff671280 0000000000000000 0000000000000002
[ 208.680760][T27684] GPR16: 0000000000000002 0000000000040001 c00020030f5a1000 c00020030f5a1548
[ 208.680760][T27684] GPR20: c0000000015fbad8 c00000000168c654 c000200361def818 c0000000005b4c10
[ 208.680760][T27684] GPR24: 0000000000000000 c0080000103365b8 c00020107dae0bd0 0000000000000400
[ 208.680760][T27684] GPR28: c00000000168c3a8 0000000000000000 0000000000000000 0000000000000000
[ 208.681014][T27684] NIP [0000000000000000] 0x0
[ 208.681065][T27684] LR [c0080000102c0048] ext4_iomap_end+0x8/0x30 [ext4]
[ 208.681091][T27684] Call Trace:
[ 208.681129][T27684] [c000200361def6b0] [c0000000005ac3bc] iomap_apply+0x20c/0x920 (unreliable)
iomap_apply at fs/iomap/apply.c:80 (discriminator 4)
[ 208.681173][T27684] [c000200361def7f0] [c0000000005b4adc] iomap_bmap+0xfc/0x160
iomap_bmap at fs/iomap/fiemap.c:142
[ 208.681228][T27684] [c000200361def850] [c0080000102c2c1c] ext4_bmap+0xa4/0x180 [ext4]
ext4_bmap at fs/ext4/inode.c:3213
[ 208.681260][T27684] [c000200361def890] [c0000000004f71fc] bmap+0x4c/0x80
[ 208.681281][T27684] [c000200361def8c0] [c00800000fdb0acc] jbd2_journal_init_inode+0x44/0x1a0 [jbd2]
jbd2_journal_init_inode at fs/jbd2/journal.c:1255
[ 208.681326][T27684] [c000200361def960] [c00800001031c808] ext4_load_journal+0x440/0x860 [ext4]
[ 208.681371][T27684] [c000200361defa30] [c008000010322a14] ext4_fill_super+0x342c/0x3ab0 [ext4]
[ 208.681414][T27684] [c000200361defba0] [c0000000004cb0bc] mount_bdev+0x25c/0x290
[ 208.681478][T27684] [c000200361defc40] [c008000010310250] ext4_mount+0x28/0x50 [ext4]
[ 208.681520][T27684] [c000200361defc60] [c00000000053242c] legacy_get_tree+0x4c/0xb0
[ 208.681556][T27684] [c000200361defc90] [c0000000004c864c] vfs_get_tree+0x4c/0x130
[ 208.681593][T27684] [c000200361defd00] [c00000000050a1c8] do_mount+0xa18/0xc50
[ 208.681641][T27684] [c000200361defdd0] [c00000000050a9a8] sys_mount+0x158/0x180
[ 208.681679][T27684] [c000200361defe20] [c00000000000b3f8] system_call+0x5c/0x68
[ 208.681726][T27684] Instruction dump:
[ 208.681747][T27684] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
[ 208.681797][T27684] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
[ 208.681839][T27684] ---[ end trace 4e9e2bab7f1d4048 ]---
[ 208.802259][T27684]
[ 209.802373][T27684] Kernel panic - not syncing: Fatal exception
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: spontaneous crash with "ext4: move ext4 bmap to use iomap infrastructure"
2020-04-01 12:38 spontaneous crash with "ext4: move ext4 bmap to use iomap infrastructure" Qian Cai
@ 2020-04-01 14:41 ` Ritesh Harjani
2020-04-01 14:51 ` Qian Cai
2020-04-03 11:26 ` Qian Cai
1 sibling, 1 reply; 6+ messages in thread
From: Ritesh Harjani @ 2020-04-01 14:41 UTC (permalink / raw)
To: Qian Cai; +Cc: Jan Kara, Darrick J. Wong, linux-ext4, LKML
Hello Qian,
Thanks for reporting it. By any chance is it your custom kernel.
Any more details on the reproducer & your setup pls.
On 4/1/20 6:08 PM, Qian Cai wrote:
> It is not always reproducible so far, but it start to show up on today’s linux-next. Look
> Trough the commits and noticed this recent one matched the new call traces,
>
> ac58e4fb03f9 (“ext4: move ext4 bmap to use iomap infrastructure")
>
> Thought?
>
> [ 206.744625][T13224] LTP: starting fallocate04
> [ 207.601583][T27684] /dev/zero: Can't open blockdev
> [ 208.674301][T27684] EXT4-fs (loop0): mounting ext3 file system using the ext4 subsystem
> [ 208.680347][T27684] BUG: Unable to handle kernel instruction fetch (NULL pointer?)
> [ 208.680383][T27684] Faulting instruction address: 0x00000000
From above two lines this looks like some NULL function ptr was called.
That's why NIP is 0x0.
But LR shown is ext4_iomap_end(). Now, There is nothing in
ext4_iomap_end() which could cause this. It should just simply return
0 in case of iomap_bmap(). In that function (shown below) flags argument
is 0.
<Code snip>
============
static int ext4_iomap_end(struct inode *inode, loff_t offset, loff_t length,
ssize_t written, unsigned flags, struct iomap *iomap)
{
/*
* Check to see whether an error occurred while writing out the data to
* the allocated blocks. If so, return the magic error code so that we
* fallback to buffered I/O and attempt to complete the remainder of
* the I/O. Any blocks that may have been allocated in preparation for
* the direct I/O will be reused during buffered I/O.
*/
if (flags & (IOMAP_WRITE | IOMAP_DIRECT) && written == 0)
return -ENOTBLK;
return 0; // ==> should simply return from here.
}
<Tried on my setup>
====================
I did try to mount/unmount on my setup with loop0 and mounting ext3
filesystem using ext4 subsystem. It's working fine as expected.
Here are the tracing logs. Couldn't see any crash.
<LOGS> `(cat trace_pipe |grep iomap_bmap)`
======
<...>-6370 [008] .... 2524.120361: iomap_apply: dev 7:0 ino 0x8
pos 0 length 65536 flags (0x0) ops ext4_iomap_ops [ext4] caller
iomap_bmap+0xb0/0xe0 actor iomap_bmap_actor
<...>-6380 [010] .... 2526.230331: iomap_apply: dev 7:0
ino 0x8 pos 0 length 1024 flags (0x0) ops ext4_iomap_ops [ext4] caller
iomap_bmap+0xb0/0xe0 actor iomap_bmap_actor
mount-6389 [010] .... 2528.200383: iomap_apply: dev 7:0
ino 0x8 pos 0 length 4096 flags (0x0) ops ext4_iomap_ops [ext4] caller
iomap_bmap+0xb0/0xe0 actor iomap_bmap_actor
mount-6398 [010] .... 2530.950352: iomap_apply: dev 7:0
ino 0x8 pos 0 length 65536 flags (0x0) ops ext4_iomap_ops [ext4] caller
iomap_bmap+0xb0/0xe0 actor iomap_bmap_actor
jbd2/loop0-8-6399 [023] .... 2531.958913: iomap_apply: dev 7:0
ino 0x8 pos 65536 length 65536 flags (0x0) ops ext4_iomap_ops [ext4]
caller iomap_bmap+0xb0/0xe0 actor iomap_bmap_actor
jbd2/loop0-8-6399 [023] .... 2531.958930: iomap_apply: dev 7:0
ino 0x8 pos 131072 length 65536 flags (0x0) ops ext4_iomap_ops [ext4]
caller iomap_bmap+0xb0/0xe0 actor iomap_bmap_actor
jbd2/loop0-8-6399 [023] .... 2531.959001: iomap_apply: dev 7:0
ino 0x8 pos 196608 length 65536 flags (0x0) ops ext4_iomap_ops [ext4]
caller iomap_bmap+0xb0/0xe0 actor iomap_bmap_actor
<...>-6407 [010] .... 2532.960326: iomap_apply: dev 7:0
ino 0x8 pos 0 length 1024 flags (0x0) ops ext4_iomap_ops [ext4] caller
iomap_bmap+0xb0/0xe0 actor iomap_bmap_actor
jbd2/loop0-8-6408 [023] .... 2540.010046: iomap_apply: dev 7:0
ino 0x8 pos 1024 length 1024 flags (0x0) ops ext4_iomap_ops [ext4]
caller iomap_bmap+0xb0/0xe0 actor iomap_bmap_actor
> [ 208.680406][T27684] Oops: Kernel access of bad area, sig: 11 [#1]
> [ 208.680439][T27684] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=256 DEBUG_PAGEALLOC NUMA PowerNV
> [ 208.680474][T27684] Modules linked in: ext4 crc16 mbcache jbd2 loop kvm_hv kvm ip_tables x_tables xfs sd_mod bnx2x ahci libahci mdio tg3 libata libphy firmware_class dm_mirror dm_region_hash dm_log dm_mod
> [ 208.680576][T27684] CPU: 117 PID: 27684 Comm: fallocate04 Tainted: G W 5.6.0-next-20200401+ #288
> [ 208.680614][T27684] NIP: 0000000000000000 LR: c0080000102c0048 CTR: 0000000000000000
> [ 208.680657][T27684] REGS: c000200361def420 TRAP: 0400 Tainted: G W (5.6.0-next-20200401+)
> [ 208.680700][T27684] MSR: 900000004280b033 <SF,HV,VEC,VSX,EE,FP,ME,IR,DR,RI,LE> CR: 42022228 XER: 20040000
> [ 208.680760][T27684] CFAR: c00800001032c494 IRQMASK: 0
> [ 208.680760][T27684] GPR00: c0000000005ac3f8 c000200361def6b0 c00000000165c200 c00020107dae0bd0
> [ 208.680760][T27684] GPR04: 0000000000000000 0000000000000400 0000000000000000 0000000000000000
> [ 208.680760][T27684] GPR08: c000200361def6e8 c0080000102c0040 000000007fffffff c000000001614e80
> [ 208.680760][T27684] GPR12: 0000000000000000 c000201fff671280 0000000000000000 0000000000000002
> [ 208.680760][T27684] GPR16: 0000000000000002 0000000000040001 c00020030f5a1000 c00020030f5a1548
> [ 208.680760][T27684] GPR20: c0000000015fbad8 c00000000168c654 c000200361def818 c0000000005b4c10
> [ 208.680760][T27684] GPR24: 0000000000000000 c0080000103365b8 c00020107dae0bd0 0000000000000400
> [ 208.680760][T27684] GPR28: c00000000168c3a8 0000000000000000 0000000000000000 0000000000000000
> [ 208.681014][T27684] NIP [0000000000000000] 0x0
> [ 208.681065][T27684] LR [c0080000102c0048] ext4_iomap_end+0x8/0x30 [ext4]
> [ 208.681091][T27684] Call Trace:
> [ 208.681129][T27684] [c000200361def6b0] [c0000000005ac3bc] iomap_apply+0x20c/0x920 (unreliable)
> iomap_apply at fs/iomap/apply.c:80 (discriminator 4)
> [ 208.681173][T27684] [c000200361def7f0] [c0000000005b4adc] iomap_bmap+0xfc/0x160
> iomap_bmap at fs/iomap/fiemap.c:142
> [ 208.681228][T27684] [c000200361def850] [c0080000102c2c1c] ext4_bmap+0xa4/0x180 [ext4]
> ext4_bmap at fs/ext4/inode.c:3213
> [ 208.681260][T27684] [c000200361def890] [c0000000004f71fc] bmap+0x4c/0x80
> [ 208.681281][T27684] [c000200361def8c0] [c00800000fdb0acc] jbd2_journal_init_inode+0x44/0x1a0 [jbd2]
> jbd2_journal_init_inode at fs/jbd2/journal.c:1255
> [ 208.681326][T27684] [c000200361def960] [c00800001031c808] ext4_load_journal+0x440/0x860 [ext4]
> [ 208.681371][T27684] [c000200361defa30] [c008000010322a14] ext4_fill_super+0x342c/0x3ab0 [ext4]
> [ 208.681414][T27684] [c000200361defba0] [c0000000004cb0bc] mount_bdev+0x25c/0x290
> [ 208.681478][T27684] [c000200361defc40] [c008000010310250] ext4_mount+0x28/0x50 [ext4]
> [ 208.681520][T27684] [c000200361defc60] [c00000000053242c] legacy_get_tree+0x4c/0xb0
> [ 208.681556][T27684] [c000200361defc90] [c0000000004c864c] vfs_get_tree+0x4c/0x130
> [ 208.681593][T27684] [c000200361defd00] [c00000000050a1c8] do_mount+0xa18/0xc50
> [ 208.681641][T27684] [c000200361defdd0] [c00000000050a9a8] sys_mount+0x158/0x180
> [ 208.681679][T27684] [c000200361defe20] [c00000000000b3f8] system_call+0x5c/0x68
> [ 208.681726][T27684] Instruction dump:
> [ 208.681747][T27684] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
> [ 208.681797][T27684] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
> [ 208.681839][T27684] ---[ end trace 4e9e2bab7f1d4048 ]---
> [ 208.802259][T27684]
> [ 209.802373][T27684] Kernel panic - not syncing: Fatal exception
>
Others,
Any clue here?
After this I am definitely setting up full LTP suite too at my end.
I mostly was using xfstests for my testing.
-ritesh
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: spontaneous crash with "ext4: move ext4 bmap to use iomap infrastructure"
2020-04-01 14:41 ` Ritesh Harjani
@ 2020-04-01 14:51 ` Qian Cai
0 siblings, 0 replies; 6+ messages in thread
From: Qian Cai @ 2020-04-01 14:51 UTC (permalink / raw)
To: Ritesh Harjani
Cc: Jan Kara, Darrick J. Wong, linux-ext4, LKML, Theodore Ts'o
> On Apr 1, 2020, at 10:41 AM, Ritesh Harjani <riteshh@linux.ibm.com> wrote:
>
> Hello Qian,
>
> Thanks for reporting it. By any chance is it your custom kernel.
> Any more details on the reproducer & your setup pls.
It was running LTP fallocate04 test case on POWER9 PowerNV with this config,
https://raw.githubusercontent.com/cailca/linux-mm/master/powerpc.config
# cat /proc/cmdline (if that does ever matter)
… page_poison=on page_owner=on numa_balancing=enable \
systemd.unified_cgroup_hierarchy=1 debug_guardpage_minorder=1 \
page_alloc.shuffle=1
>
>
> On 4/1/20 6:08 PM, Qian Cai wrote:
>> It is not always reproducible so far, but it start to show up on today’s linux-next. Look
>> Trough the commits and noticed this recent one matched the new call traces,
>> ac58e4fb03f9 (“ext4: move ext4 bmap to use iomap infrastructure")
>> Thought?
>> [ 206.744625][T13224] LTP: starting fallocate04
>> [ 207.601583][T27684] /dev/zero: Can't open blockdev
>> [ 208.674301][T27684] EXT4-fs (loop0): mounting ext3 file system using the ext4 subsystem
>> [ 208.680347][T27684] BUG: Unable to handle kernel instruction fetch (NULL pointer?)
>> [ 208.680383][T27684] Faulting instruction address: 0x00000000
>
> From above two lines this looks like some NULL function ptr was called.
> That's why NIP is 0x0.
>
> But LR shown is ext4_iomap_end(). Now, There is nothing in
> ext4_iomap_end() which could cause this. It should just simply return
> 0 in case of iomap_bmap(). In that function (shown below) flags argument
> is 0.
>
> <Code snip>
> ============
> static int ext4_iomap_end(struct inode *inode, loff_t offset, loff_t length,
> ssize_t written, unsigned flags, struct iomap *iomap)
> {
> /*
> * Check to see whether an error occurred while writing out the data to
> * the allocated blocks. If so, return the magic error code so that we
> * fallback to buffered I/O and attempt to complete the remainder of
> * the I/O. Any blocks that may have been allocated in preparation for
> * the direct I/O will be reused during buffered I/O.
> */
> if (flags & (IOMAP_WRITE | IOMAP_DIRECT) && written == 0)
> return -ENOTBLK;
>
> return 0; // ==> should simply return from here.
> }
>
> <Tried on my setup>
> ====================
> I did try to mount/unmount on my setup with loop0 and mounting ext3
> filesystem using ext4 subsystem. It's working fine as expected.
> Here are the tracing logs. Couldn't see any crash.
>
>
> <LOGS> `(cat trace_pipe |grep iomap_bmap)`
> ======
> <...>-6370 [008] .... 2524.120361: iomap_apply: dev 7:0 ino 0x8 pos 0 length 65536 flags (0x0) ops ext4_iomap_ops [ext4] caller iomap_bmap+0xb0/0xe0 actor iomap_bmap_actor
> <...>-6380 [010] .... 2526.230331: iomap_apply: dev 7:0 ino 0x8 pos 0 length 1024 flags (0x0) ops ext4_iomap_ops [ext4] caller iomap_bmap+0xb0/0xe0 actor iomap_bmap_actor
> mount-6389 [010] .... 2528.200383: iomap_apply: dev 7:0 ino 0x8 pos 0 length 4096 flags (0x0) ops ext4_iomap_ops [ext4] caller iomap_bmap+0xb0/0xe0 actor iomap_bmap_actor
> mount-6398 [010] .... 2530.950352: iomap_apply: dev 7:0 ino 0x8 pos 0 length 65536 flags (0x0) ops ext4_iomap_ops [ext4] caller iomap_bmap+0xb0/0xe0 actor iomap_bmap_actor
> jbd2/loop0-8-6399 [023] .... 2531.958913: iomap_apply: dev 7:0 ino 0x8 pos 65536 length 65536 flags (0x0) ops ext4_iomap_ops [ext4] caller iomap_bmap+0xb0/0xe0 actor iomap_bmap_actor
> jbd2/loop0-8-6399 [023] .... 2531.958930: iomap_apply: dev 7:0 ino 0x8 pos 131072 length 65536 flags (0x0) ops ext4_iomap_ops [ext4] caller iomap_bmap+0xb0/0xe0 actor iomap_bmap_actor
> jbd2/loop0-8-6399 [023] .... 2531.959001: iomap_apply: dev 7:0 ino 0x8 pos 196608 length 65536 flags (0x0) ops ext4_iomap_ops [ext4] caller iomap_bmap+0xb0/0xe0 actor iomap_bmap_actor
> <...>-6407 [010] .... 2532.960326: iomap_apply: dev 7:0 ino 0x8 pos 0 length 1024 flags (0x0) ops ext4_iomap_ops [ext4] caller iomap_bmap+0xb0/0xe0 actor iomap_bmap_actor
> jbd2/loop0-8-6408 [023] .... 2540.010046: iomap_apply: dev 7:0 ino 0x8 pos 1024 length 1024 flags (0x0) ops ext4_iomap_ops [ext4] caller iomap_bmap+0xb0/0xe0 actor iomap_bmap_actor
>
>
>> [ 208.680406][T27684] Oops: Kernel access of bad area, sig: 11 [#1]
>> [ 208.680439][T27684] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=256 DEBUG_PAGEALLOC NUMA PowerNV
>> [ 208.680474][T27684] Modules linked in: ext4 crc16 mbcache jbd2 loop kvm_hv kvm ip_tables x_tables xfs sd_mod bnx2x ahci libahci mdio tg3 libata libphy firmware_class dm_mirror dm_region_hash dm_log dm_mod
>> [ 208.680576][T27684] CPU: 117 PID: 27684 Comm: fallocate04 Tainted: G W 5.6.0-next-20200401+ #288
>> [ 208.680614][T27684] NIP: 0000000000000000 LR: c0080000102c0048 CTR: 0000000000000000
>> [ 208.680657][T27684] REGS: c000200361def420 TRAP: 0400 Tainted: G W (5.6.0-next-20200401+)
>> [ 208.680700][T27684] MSR: 900000004280b033 <SF,HV,VEC,VSX,EE,FP,ME,IR,DR,RI,LE> CR: 42022228 XER: 20040000
>> [ 208.680760][T27684] CFAR: c00800001032c494 IRQMASK: 0
>> [ 208.680760][T27684] GPR00: c0000000005ac3f8 c000200361def6b0 c00000000165c200 c00020107dae0bd0
>> [ 208.680760][T27684] GPR04: 0000000000000000 0000000000000400 0000000000000000 0000000000000000
>> [ 208.680760][T27684] GPR08: c000200361def6e8 c0080000102c0040 000000007fffffff c000000001614e80
>> [ 208.680760][T27684] GPR12: 0000000000000000 c000201fff671280 0000000000000000 0000000000000002
>> [ 208.680760][T27684] GPR16: 0000000000000002 0000000000040001 c00020030f5a1000 c00020030f5a1548
>> [ 208.680760][T27684] GPR20: c0000000015fbad8 c00000000168c654 c000200361def818 c0000000005b4c10
>> [ 208.680760][T27684] GPR24: 0000000000000000 c0080000103365b8 c00020107dae0bd0 0000000000000400
>> [ 208.680760][T27684] GPR28: c00000000168c3a8 0000000000000000 0000000000000000 0000000000000000
>> [ 208.681014][T27684] NIP [0000000000000000] 0x0
>> [ 208.681065][T27684] LR [c0080000102c0048] ext4_iomap_end+0x8/0x30 [ext4]
>> [ 208.681091][T27684] Call Trace:
>> [ 208.681129][T27684] [c000200361def6b0] [c0000000005ac3bc] iomap_apply+0x20c/0x920 (unreliable)
>> iomap_apply at fs/iomap/apply.c:80 (discriminator 4)
>> [ 208.681173][T27684] [c000200361def7f0] [c0000000005b4adc] iomap_bmap+0xfc/0x160
>> iomap_bmap at fs/iomap/fiemap.c:142
>> [ 208.681228][T27684] [c000200361def850] [c0080000102c2c1c] ext4_bmap+0xa4/0x180 [ext4]
>> ext4_bmap at fs/ext4/inode.c:3213
>> [ 208.681260][T27684] [c000200361def890] [c0000000004f71fc] bmap+0x4c/0x80
>> [ 208.681281][T27684] [c000200361def8c0] [c00800000fdb0acc] jbd2_journal_init_inode+0x44/0x1a0 [jbd2]
>> jbd2_journal_init_inode at fs/jbd2/journal.c:1255
>> [ 208.681326][T27684] [c000200361def960] [c00800001031c808] ext4_load_journal+0x440/0x860 [ext4]
>> [ 208.681371][T27684] [c000200361defa30] [c008000010322a14] ext4_fill_super+0x342c/0x3ab0 [ext4]
>> [ 208.681414][T27684] [c000200361defba0] [c0000000004cb0bc] mount_bdev+0x25c/0x290
>> [ 208.681478][T27684] [c000200361defc40] [c008000010310250] ext4_mount+0x28/0x50 [ext4]
>> [ 208.681520][T27684] [c000200361defc60] [c00000000053242c] legacy_get_tree+0x4c/0xb0
>> [ 208.681556][T27684] [c000200361defc90] [c0000000004c864c] vfs_get_tree+0x4c/0x130
>> [ 208.681593][T27684] [c000200361defd00] [c00000000050a1c8] do_mount+0xa18/0xc50
>> [ 208.681641][T27684] [c000200361defdd0] [c00000000050a9a8] sys_mount+0x158/0x180
>> [ 208.681679][T27684] [c000200361defe20] [c00000000000b3f8] system_call+0x5c/0x68
>> [ 208.681726][T27684] Instruction dump:
>> [ 208.681747][T27684] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
>> [ 208.681797][T27684] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
>> [ 208.681839][T27684] ---[ end trace 4e9e2bab7f1d4048 ]---
>> [ 208.802259][T27684]
>> [ 209.802373][T27684] Kernel panic - not syncing: Fatal exception
>
> Others,
> Any clue here?
>
>
> After this I am definitely setting up full LTP suite too at my end.
> I mostly was using xfstests for my testing.
>
>
> -ritesh
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: spontaneous crash with "ext4: move ext4 bmap to use iomap infrastructure"
2020-04-01 12:38 spontaneous crash with "ext4: move ext4 bmap to use iomap infrastructure" Qian Cai
2020-04-01 14:41 ` Ritesh Harjani
@ 2020-04-03 11:26 ` Qian Cai
2020-04-03 11:34 ` Ritesh Harjani
1 sibling, 1 reply; 6+ messages in thread
From: Qian Cai @ 2020-04-03 11:26 UTC (permalink / raw)
To: Ritesh Harjani
Cc: Jan Kara, Darrick J. Wong, linux-ext4, LKML, Theodore Ts'o
> On Apr 1, 2020, at 8:38 AM, Qian Cai <cai@lca.pw> wrote:
>
> It is not always reproducible so far, but it start to show up on today’s linux-next. Look
> Trough the commits and noticed this recent one matched the new call traces,
>
> ac58e4fb03f9 (“ext4: move ext4 bmap to use iomap infrastructure")
>
> Thought?
FYI, this starts to become more reproducible that happens again with today’s linux-next as well.
[ 375.277947][T13110] LTP: starting fallocate04
[ 375.892545][T27575] /dev/zero: Can't open blockdev
[ 376.899021][T27575] EXT4-fs (loop0): mounting ext3 file system using the ext4 subsystem
[ 376.905283][T27575] BUG: Unable to handle kernel instruction fetch (NULL pointer?)
[ 376.905308][T27575] Faulting instruction address: 0x00000000
[ 376.905333][T27575] Oops: Kernel access of bad area, sig: 11 [#1]
[ 376.905346][T27575] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=256 DEBUG_PAGEALLOC NUMA PowerNV
[ 376.905371][T27575] Modules linked in: ext4 crc16 mbcache jbd2 loop kvm_hv kvm ip_tables x_tables xfs sd_mod bnx2x ahci tg3 mdio libahci libphy libata firmware_class dm_mirror dm_region_hash dm_log dm_mod
[ 376.905419][T27575] CPU: 64 PID: 27575 Comm: fallocate04 Tainted: G W L 5.6.0-next-20200403+ #347
[ 376.905456][T27575] NIP: 0000000000000000 LR: c008000010b90048 CTR: 0000000000000000
[ 376.905479][T27575] REGS: c000200aaeb0f3b0 TRAP: 0400 Tainted: G W L (5.6.0-next-20200403+)
[ 376.905513][T27575] MSR: 900000004280b033 <SF,HV,VEC,VSX,EE,FP,ME,IR,DR,RI,LE> CR: 42022228 XER: 20040000
[ 376.905545][T27575] CFAR: c008000010bfc494 IRQMASK: 0
[ 376.905545][T27575] GPR00: c0000000005af3b8 c000200aaeb0f640 c00000000165ce00 c000201aa7924ec0
[ 376.905545][T27575] GPR04: 0000000000000000 0000000000000400 0000000000000000 0000000000000000
[ 376.905545][T27575] GPR08: c000200aaeb0f678 c008000010b90040 000000007fffffff c00000000163c580
[ 376.905545][T27575] GPR12: 0000000000000000 c000201fff7fb380 0000000000000000 0000000000000002
[ 376.905545][T27575] GPR16: 0000000000000002 0000000000040001 c000201bd4ee4000 c000201bd4ee4548
[ 376.905545][T27575] GPR20: c0000000015fbd18 c00000000168c654 c000200aaeb0f7a8 c0000000005b7bf0
[ 376.905545][T27575] GPR24: 0000000000000000 c008000010c065b8 c000201aa7924ec0 0000000000000400
[ 376.905545][T27575] GPR28: c00000000168c3a8 0000000000000000 0000000000000000 0000000000000000
[ 376.905768][T27575] NIP [0000000000000000] 0x0
[ 376.905798][T27575] LR [c008000010b90048] ext4_iomap_end+0x8/0x30 [ext4]
[ 376.905820][T27575] Call Trace:
[ 376.905844][T27575] [c000200aaeb0f640] [c0000000005af37c] iomap_apply+0x20c/0x920 (unreliable)
[ 376.905870][T27575] [c000200aaeb0f780] [c0000000005b7abc] iomap_bmap+0xfc/0x160
[ 376.905911][T27575] [c000200aaeb0f7e0] [c008000010b92c1c] ext4_bmap+0xa4/0x180 [ext4]
[ 376.905937][T27575] [c000200aaeb0f820] [c0000000004fa22c] bmap+0x4c/0x80
[ 376.905962][T27575] [c000200aaeb0f850] [c00800000fcf0acc] jbd2_journal_init_inode+0x44/0x1a0 [jbd2]
[ 376.906005][T27575] [c000200aaeb0f8f0] [c008000010bec808] ext4_load_journal+0x440/0x860 [ext4]
[ 376.906059][T27575] [c000200aaeb0f9c0] [c008000010bf2a14] ext4_fill_super+0x342c/0x3ab0 [ext4]
[ 376.906086][T27575] [c000200aaeb0fb30] [c0000000004ce0ec] mount_bdev+0x25c/0x290
[ 376.906107][T27575] [c000200aaeb0fbd0] [c008000010be0250] ext4_mount+0x28/0x50 [ext4]
[ 376.906143][T27575] [c000200aaeb0fbf0] [c0000000005353cc] legacy_get_tree+0x4c/0xb0
[ 376.906177][T27575] [c000200aaeb0fc20] [c0000000004cb67c] vfs_get_tree+0x4c/0x130
[ 376.906213][T27575] [c000200aaeb0fc90] [c00000000050d1f8] do_mount+0xa18/0xc50
[ 376.906257][T27575] [c000200aaeb0fd60] [c00000000050d9d8] sys_mount+0x158/0x180
[ 376.906307][T27575] [c000200aaeb0fdb0] [c00000000003cc30] system_call_exception+0x110/0x1e0
[ 376.906334][T27575] [c000200aaeb0fe20] [c00000000000c9f0] system_call_common+0xf0/0x278
[ 376.906367][T27575] Instruction dump:
[ 376.906387][T27575] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
[ 376.906434][T27575] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
[ 376.906472][T27575] ---[ end trace fa91408cebc70be1 ]---
[ 377.389381][T27575]
[ 378.389480][T27575] Kernel panic - not syncing: Fatal exception
[ 379.824028][
>
> [ 206.744625][T13224] LTP: starting fallocate04
> [ 207.601583][T27684] /dev/zero: Can't open blockdev
> [ 208.674301][T27684] EXT4-fs (loop0): mounting ext3 file system using the ext4 subsystem
> [ 208.680347][T27684] BUG: Unable to handle kernel instruction fetch (NULL pointer?)
> [ 208.680383][T27684] Faulting instruction address: 0x00000000
> [ 208.680406][T27684] Oops: Kernel access of bad area, sig: 11 [#1]
> [ 208.680439][T27684] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=256 DEBUG_PAGEALLOC NUMA PowerNV
> [ 208.680474][T27684] Modules linked in: ext4 crc16 mbcache jbd2 loop kvm_hv kvm ip_tables x_tables xfs sd_mod bnx2x ahci libahci mdio tg3 libata libphy firmware_class dm_mirror dm_region_hash dm_log dm_mod
> [ 208.680576][T27684] CPU: 117 PID: 27684 Comm: fallocate04 Tainted: G W 5.6.0-next-20200401+ #288
> [ 208.680614][T27684] NIP: 0000000000000000 LR: c0080000102c0048 CTR: 0000000000000000
> [ 208.680657][T27684] REGS: c000200361def420 TRAP: 0400 Tainted: G W (5.6.0-next-20200401+)
> [ 208.680700][T27684] MSR: 900000004280b033 <SF,HV,VEC,VSX,EE,FP,ME,IR,DR,RI,LE> CR: 42022228 XER: 20040000
> [ 208.680760][T27684] CFAR: c00800001032c494 IRQMASK: 0
> [ 208.680760][T27684] GPR00: c0000000005ac3f8 c000200361def6b0 c00000000165c200 c00020107dae0bd0
> [ 208.680760][T27684] GPR04: 0000000000000000 0000000000000400 0000000000000000 0000000000000000
> [ 208.680760][T27684] GPR08: c000200361def6e8 c0080000102c0040 000000007fffffff c000000001614e80
> [ 208.680760][T27684] GPR12: 0000000000000000 c000201fff671280 0000000000000000 0000000000000002
> [ 208.680760][T27684] GPR16: 0000000000000002 0000000000040001 c00020030f5a1000 c00020030f5a1548
> [ 208.680760][T27684] GPR20: c0000000015fbad8 c00000000168c654 c000200361def818 c0000000005b4c10
> [ 208.680760][T27684] GPR24: 0000000000000000 c0080000103365b8 c00020107dae0bd0 0000000000000400
> [ 208.680760][T27684] GPR28: c00000000168c3a8 0000000000000000 0000000000000000 0000000000000000
> [ 208.681014][T27684] NIP [0000000000000000] 0x0
> [ 208.681065][T27684] LR [c0080000102c0048] ext4_iomap_end+0x8/0x30 [ext4]
> [ 208.681091][T27684] Call Trace:
> [ 208.681129][T27684] [c000200361def6b0] [c0000000005ac3bc] iomap_apply+0x20c/0x920 (unreliable)
> iomap_apply at fs/iomap/apply.c:80 (discriminator 4)
> [ 208.681173][T27684] [c000200361def7f0] [c0000000005b4adc] iomap_bmap+0xfc/0x160
> iomap_bmap at fs/iomap/fiemap.c:142
> [ 208.681228][T27684] [c000200361def850] [c0080000102c2c1c] ext4_bmap+0xa4/0x180 [ext4]
> ext4_bmap at fs/ext4/inode.c:3213
> [ 208.681260][T27684] [c000200361def890] [c0000000004f71fc] bmap+0x4c/0x80
> [ 208.681281][T27684] [c000200361def8c0] [c00800000fdb0acc] jbd2_journal_init_inode+0x44/0x1a0 [jbd2]
> jbd2_journal_init_inode at fs/jbd2/journal.c:1255
> [ 208.681326][T27684] [c000200361def960] [c00800001031c808] ext4_load_journal+0x440/0x860 [ext4]
> [ 208.681371][T27684] [c000200361defa30] [c008000010322a14] ext4_fill_super+0x342c/0x3ab0 [ext4]
> [ 208.681414][T27684] [c000200361defba0] [c0000000004cb0bc] mount_bdev+0x25c/0x290
> [ 208.681478][T27684] [c000200361defc40] [c008000010310250] ext4_mount+0x28/0x50 [ext4]
> [ 208.681520][T27684] [c000200361defc60] [c00000000053242c] legacy_get_tree+0x4c/0xb0
> [ 208.681556][T27684] [c000200361defc90] [c0000000004c864c] vfs_get_tree+0x4c/0x130
> [ 208.681593][T27684] [c000200361defd00] [c00000000050a1c8] do_mount+0xa18/0xc50
> [ 208.681641][T27684] [c000200361defdd0] [c00000000050a9a8] sys_mount+0x158/0x180
> [ 208.681679][T27684] [c000200361defe20] [c00000000000b3f8] system_call+0x5c/0x68
> [ 208.681726][T27684] Instruction dump:
> [ 208.681747][T27684] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
> [ 208.681797][T27684] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
> [ 208.681839][T27684] ---[ end trace 4e9e2bab7f1d4048 ]---
> [ 208.802259][T27684]
> [ 209.802373][T27684] Kernel panic - not syncing: Fatal exception
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: spontaneous crash with "ext4: move ext4 bmap to use iomap infrastructure"
2020-04-03 11:26 ` Qian Cai
@ 2020-04-03 11:34 ` Ritesh Harjani
2020-04-07 2:33 ` Qian Cai
0 siblings, 1 reply; 6+ messages in thread
From: Ritesh Harjani @ 2020-04-03 11:34 UTC (permalink / raw)
To: Qian Cai; +Cc: Jan Kara, Darrick J. Wong, linux-ext4, LKML, Theodore Ts'o
On 4/3/20 4:56 PM, Qian Cai wrote:
>
>
>> On Apr 1, 2020, at 8:38 AM, Qian Cai <cai@lca.pw> wrote:
>>
>> It is not always reproducible so far, but it start to show up on today’s linux-next. Look
>> Trough the commits and noticed this recent one matched the new call traces,
>>
>> ac58e4fb03f9 (“ext4: move ext4 bmap to use iomap infrastructure")
>>
>> Thought?
>
> FYI, this starts to become more reproducible that happens again with today’s linux-next as well.
Do you have the crash dump and vmlinux for this crash pls?
Could you share it somehow with me.
I tried reproducing this (fallocate04) for more than 6000 iterations.
But I couldn't see this on my setup.
Let me try it again with today's linux-next.
-ritesh
>
> [ 375.277947][T13110] LTP: starting fallocate04
> [ 375.892545][T27575] /dev/zero: Can't open blockdev
> [ 376.899021][T27575] EXT4-fs (loop0): mounting ext3 file system using the ext4 subsystem
> [ 376.905283][T27575] BUG: Unable to handle kernel instruction fetch (NULL pointer?)
> [ 376.905308][T27575] Faulting instruction address: 0x00000000
> [ 376.905333][T27575] Oops: Kernel access of bad area, sig: 11 [#1]
> [ 376.905346][T27575] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=256 DEBUG_PAGEALLOC NUMA PowerNV
> [ 376.905371][T27575] Modules linked in: ext4 crc16 mbcache jbd2 loop kvm_hv kvm ip_tables x_tables xfs sd_mod bnx2x ahci tg3 mdio libahci libphy libata firmware_class dm_mirror dm_region_hash dm_log dm_mod
> [ 376.905419][T27575] CPU: 64 PID: 27575 Comm: fallocate04 Tainted: G W L 5.6.0-next-20200403+ #347
> [ 376.905456][T27575] NIP: 0000000000000000 LR: c008000010b90048 CTR: 0000000000000000
> [ 376.905479][T27575] REGS: c000200aaeb0f3b0 TRAP: 0400 Tainted: G W L (5.6.0-next-20200403+)
> [ 376.905513][T27575] MSR: 900000004280b033 <SF,HV,VEC,VSX,EE,FP,ME,IR,DR,RI,LE> CR: 42022228 XER: 20040000
> [ 376.905545][T27575] CFAR: c008000010bfc494 IRQMASK: 0
> [ 376.905545][T27575] GPR00: c0000000005af3b8 c000200aaeb0f640 c00000000165ce00 c000201aa7924ec0
> [ 376.905545][T27575] GPR04: 0000000000000000 0000000000000400 0000000000000000 0000000000000000
> [ 376.905545][T27575] GPR08: c000200aaeb0f678 c008000010b90040 000000007fffffff c00000000163c580
> [ 376.905545][T27575] GPR12: 0000000000000000 c000201fff7fb380 0000000000000000 0000000000000002
> [ 376.905545][T27575] GPR16: 0000000000000002 0000000000040001 c000201bd4ee4000 c000201bd4ee4548
> [ 376.905545][T27575] GPR20: c0000000015fbd18 c00000000168c654 c000200aaeb0f7a8 c0000000005b7bf0
> [ 376.905545][T27575] GPR24: 0000000000000000 c008000010c065b8 c000201aa7924ec0 0000000000000400
> [ 376.905545][T27575] GPR28: c00000000168c3a8 0000000000000000 0000000000000000 0000000000000000
> [ 376.905768][T27575] NIP [0000000000000000] 0x0
> [ 376.905798][T27575] LR [c008000010b90048] ext4_iomap_end+0x8/0x30 [ext4]
> [ 376.905820][T27575] Call Trace:
> [ 376.905844][T27575] [c000200aaeb0f640] [c0000000005af37c] iomap_apply+0x20c/0x920 (unreliable)
> [ 376.905870][T27575] [c000200aaeb0f780] [c0000000005b7abc] iomap_bmap+0xfc/0x160
> [ 376.905911][T27575] [c000200aaeb0f7e0] [c008000010b92c1c] ext4_bmap+0xa4/0x180 [ext4]
> [ 376.905937][T27575] [c000200aaeb0f820] [c0000000004fa22c] bmap+0x4c/0x80
> [ 376.905962][T27575] [c000200aaeb0f850] [c00800000fcf0acc] jbd2_journal_init_inode+0x44/0x1a0 [jbd2]
> [ 376.906005][T27575] [c000200aaeb0f8f0] [c008000010bec808] ext4_load_journal+0x440/0x860 [ext4]
> [ 376.906059][T27575] [c000200aaeb0f9c0] [c008000010bf2a14] ext4_fill_super+0x342c/0x3ab0 [ext4]
> [ 376.906086][T27575] [c000200aaeb0fb30] [c0000000004ce0ec] mount_bdev+0x25c/0x290
> [ 376.906107][T27575] [c000200aaeb0fbd0] [c008000010be0250] ext4_mount+0x28/0x50 [ext4]
> [ 376.906143][T27575] [c000200aaeb0fbf0] [c0000000005353cc] legacy_get_tree+0x4c/0xb0
> [ 376.906177][T27575] [c000200aaeb0fc20] [c0000000004cb67c] vfs_get_tree+0x4c/0x130
> [ 376.906213][T27575] [c000200aaeb0fc90] [c00000000050d1f8] do_mount+0xa18/0xc50
> [ 376.906257][T27575] [c000200aaeb0fd60] [c00000000050d9d8] sys_mount+0x158/0x180
> [ 376.906307][T27575] [c000200aaeb0fdb0] [c00000000003cc30] system_call_exception+0x110/0x1e0
> [ 376.906334][T27575] [c000200aaeb0fe20] [c00000000000c9f0] system_call_common+0xf0/0x278
> [ 376.906367][T27575] Instruction dump:
> [ 376.906387][T27575] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
> [ 376.906434][T27575] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
> [ 376.906472][T27575] ---[ end trace fa91408cebc70be1 ]---
> [ 377.389381][T27575]
> [ 378.389480][T27575] Kernel panic - not syncing: Fatal exception
> [ 379.824028][
>
>>
>> [ 206.744625][T13224] LTP: starting fallocate04
>> [ 207.601583][T27684] /dev/zero: Can't open blockdev
>> [ 208.674301][T27684] EXT4-fs (loop0): mounting ext3 file system using the ext4 subsystem
>> [ 208.680347][T27684] BUG: Unable to handle kernel instruction fetch (NULL pointer?)
>> [ 208.680383][T27684] Faulting instruction address: 0x00000000
>> [ 208.680406][T27684] Oops: Kernel access of bad area, sig: 11 [#1]
>> [ 208.680439][T27684] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=256 DEBUG_PAGEALLOC NUMA PowerNV
>> [ 208.680474][T27684] Modules linked in: ext4 crc16 mbcache jbd2 loop kvm_hv kvm ip_tables x_tables xfs sd_mod bnx2x ahci libahci mdio tg3 libata libphy firmware_class dm_mirror dm_region_hash dm_log dm_mod
>> [ 208.680576][T27684] CPU: 117 PID: 27684 Comm: fallocate04 Tainted: G W 5.6.0-next-20200401+ #288
>> [ 208.680614][T27684] NIP: 0000000000000000 LR: c0080000102c0048 CTR: 0000000000000000
>> [ 208.680657][T27684] REGS: c000200361def420 TRAP: 0400 Tainted: G W (5.6.0-next-20200401+)
>> [ 208.680700][T27684] MSR: 900000004280b033 <SF,HV,VEC,VSX,EE,FP,ME,IR,DR,RI,LE> CR: 42022228 XER: 20040000
>> [ 208.680760][T27684] CFAR: c00800001032c494 IRQMASK: 0
>> [ 208.680760][T27684] GPR00: c0000000005ac3f8 c000200361def6b0 c00000000165c200 c00020107dae0bd0
>> [ 208.680760][T27684] GPR04: 0000000000000000 0000000000000400 0000000000000000 0000000000000000
>> [ 208.680760][T27684] GPR08: c000200361def6e8 c0080000102c0040 000000007fffffff c000000001614e80
>> [ 208.680760][T27684] GPR12: 0000000000000000 c000201fff671280 0000000000000000 0000000000000002
>> [ 208.680760][T27684] GPR16: 0000000000000002 0000000000040001 c00020030f5a1000 c00020030f5a1548
>> [ 208.680760][T27684] GPR20: c0000000015fbad8 c00000000168c654 c000200361def818 c0000000005b4c10
>> [ 208.680760][T27684] GPR24: 0000000000000000 c0080000103365b8 c00020107dae0bd0 0000000000000400
>> [ 208.680760][T27684] GPR28: c00000000168c3a8 0000000000000000 0000000000000000 0000000000000000
>> [ 208.681014][T27684] NIP [0000000000000000] 0x0
>> [ 208.681065][T27684] LR [c0080000102c0048] ext4_iomap_end+0x8/0x30 [ext4]
>> [ 208.681091][T27684] Call Trace:
>> [ 208.681129][T27684] [c000200361def6b0] [c0000000005ac3bc] iomap_apply+0x20c/0x920 (unreliable)
>> iomap_apply at fs/iomap/apply.c:80 (discriminator 4)
>> [ 208.681173][T27684] [c000200361def7f0] [c0000000005b4adc] iomap_bmap+0xfc/0x160
>> iomap_bmap at fs/iomap/fiemap.c:142
>> [ 208.681228][T27684] [c000200361def850] [c0080000102c2c1c] ext4_bmap+0xa4/0x180 [ext4]
>> ext4_bmap at fs/ext4/inode.c:3213
>> [ 208.681260][T27684] [c000200361def890] [c0000000004f71fc] bmap+0x4c/0x80
>> [ 208.681281][T27684] [c000200361def8c0] [c00800000fdb0acc] jbd2_journal_init_inode+0x44/0x1a0 [jbd2]
>> jbd2_journal_init_inode at fs/jbd2/journal.c:1255
>> [ 208.681326][T27684] [c000200361def960] [c00800001031c808] ext4_load_journal+0x440/0x860 [ext4]
>> [ 208.681371][T27684] [c000200361defa30] [c008000010322a14] ext4_fill_super+0x342c/0x3ab0 [ext4]
>> [ 208.681414][T27684] [c000200361defba0] [c0000000004cb0bc] mount_bdev+0x25c/0x290
>> [ 208.681478][T27684] [c000200361defc40] [c008000010310250] ext4_mount+0x28/0x50 [ext4]
>> [ 208.681520][T27684] [c000200361defc60] [c00000000053242c] legacy_get_tree+0x4c/0xb0
>> [ 208.681556][T27684] [c000200361defc90] [c0000000004c864c] vfs_get_tree+0x4c/0x130
>> [ 208.681593][T27684] [c000200361defd00] [c00000000050a1c8] do_mount+0xa18/0xc50
>> [ 208.681641][T27684] [c000200361defdd0] [c00000000050a9a8] sys_mount+0x158/0x180
>> [ 208.681679][T27684] [c000200361defe20] [c00000000000b3f8] system_call+0x5c/0x68
>> [ 208.681726][T27684] Instruction dump:
>> [ 208.681747][T27684] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
>> [ 208.681797][T27684] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
>> [ 208.681839][T27684] ---[ end trace 4e9e2bab7f1d4048 ]---
>> [ 208.802259][T27684]
>> [ 209.802373][T27684] Kernel panic - not syncing: Fatal exception
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: spontaneous crash with "ext4: move ext4 bmap to use iomap infrastructure"
2020-04-03 11:34 ` Ritesh Harjani
@ 2020-04-07 2:33 ` Qian Cai
0 siblings, 0 replies; 6+ messages in thread
From: Qian Cai @ 2020-04-07 2:33 UTC (permalink / raw)
To: Ritesh Harjani
Cc: Jan Kara, Darrick J. Wong, linux-ext4, LKML, Theodore Ts'o
> On Apr 3, 2020, at 7:34 AM, Ritesh Harjani <riteshh@linux.ibm.com> wrote:
>
>
>
> On 4/3/20 4:56 PM, Qian Cai wrote:
>>> On Apr 1, 2020, at 8:38 AM, Qian Cai <cai@lca.pw> wrote:
>>>
>>> It is not always reproducible so far, but it start to show up on today’s linux-next. Look
>>> Trough the commits and noticed this recent one matched the new call traces,
>>>
>>> ac58e4fb03f9 (“ext4: move ext4 bmap to use iomap infrastructure")
>>>
>>> Thought?
>> FYI, this starts to become more reproducible that happens again with today’s linux-next as well.
>
>
> Do you have the crash dump and vmlinux for this crash pls?
> Could you share it somehow with me.
FYI.
At this point, it is more likely due to something powerpc rather than ext4. See,
https://lore.kernel.org/lkml/15AC5B0E-A221-4B8C-9039-FA96B8EF7C88@lca.pw/
>
> I tried reproducing this (fallocate04) for more than 6000 iterations.
> But I couldn't see this on my setup.
>
> Let me try it again with today's linux-next.
>
> -ritesh
>
>
>> [ 375.277947][T13110] LTP: starting fallocate04
>> [ 375.892545][T27575] /dev/zero: Can't open blockdev
>> [ 376.899021][T27575] EXT4-fs (loop0): mounting ext3 file system using the ext4 subsystem
>> [ 376.905283][T27575] BUG: Unable to handle kernel instruction fetch (NULL pointer?)
>> [ 376.905308][T27575] Faulting instruction address: 0x00000000
>> [ 376.905333][T27575] Oops: Kernel access of bad area, sig: 11 [#1]
>> [ 376.905346][T27575] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=256 DEBUG_PAGEALLOC NUMA PowerNV
>> [ 376.905371][T27575] Modules linked in: ext4 crc16 mbcache jbd2 loop kvm_hv kvm ip_tables x_tables xfs sd_mod bnx2x ahci tg3 mdio libahci libphy libata firmware_class dm_mirror dm_region_hash dm_log dm_mod
>> [ 376.905419][T27575] CPU: 64 PID: 27575 Comm: fallocate04 Tainted: G W L 5.6.0-next-20200403+ #347
>> [ 376.905456][T27575] NIP: 0000000000000000 LR: c008000010b90048 CTR: 0000000000000000
>> [ 376.905479][T27575] REGS: c000200aaeb0f3b0 TRAP: 0400 Tainted: G W L (5.6.0-next-20200403+)
>> [ 376.905513][T27575] MSR: 900000004280b033 <SF,HV,VEC,VSX,EE,FP,ME,IR,DR,RI,LE> CR: 42022228 XER: 20040000
>> [ 376.905545][T27575] CFAR: c008000010bfc494 IRQMASK: 0
>> [ 376.905545][T27575] GPR00: c0000000005af3b8 c000200aaeb0f640 c00000000165ce00 c000201aa7924ec0
>> [ 376.905545][T27575] GPR04: 0000000000000000 0000000000000400 0000000000000000 0000000000000000
>> [ 376.905545][T27575] GPR08: c000200aaeb0f678 c008000010b90040 000000007fffffff c00000000163c580
>> [ 376.905545][T27575] GPR12: 0000000000000000 c000201fff7fb380 0000000000000000 0000000000000002
>> [ 376.905545][T27575] GPR16: 0000000000000002 0000000000040001 c000201bd4ee4000 c000201bd4ee4548
>> [ 376.905545][T27575] GPR20: c0000000015fbd18 c00000000168c654 c000200aaeb0f7a8 c0000000005b7bf0
>> [ 376.905545][T27575] GPR24: 0000000000000000 c008000010c065b8 c000201aa7924ec0 0000000000000400
>> [ 376.905545][T27575] GPR28: c00000000168c3a8 0000000000000000 0000000000000000 0000000000000000
>> [ 376.905768][T27575] NIP [0000000000000000] 0x0
>> [ 376.905798][T27575] LR [c008000010b90048] ext4_iomap_end+0x8/0x30 [ext4]
>> [ 376.905820][T27575] Call Trace:
>> [ 376.905844][T27575] [c000200aaeb0f640] [c0000000005af37c] iomap_apply+0x20c/0x920 (unreliable)
>> [ 376.905870][T27575] [c000200aaeb0f780] [c0000000005b7abc] iomap_bmap+0xfc/0x160
>> [ 376.905911][T27575] [c000200aaeb0f7e0] [c008000010b92c1c] ext4_bmap+0xa4/0x180 [ext4]
>> [ 376.905937][T27575] [c000200aaeb0f820] [c0000000004fa22c] bmap+0x4c/0x80
>> [ 376.905962][T27575] [c000200aaeb0f850] [c00800000fcf0acc] jbd2_journal_init_inode+0x44/0x1a0 [jbd2]
>> [ 376.906005][T27575] [c000200aaeb0f8f0] [c008000010bec808] ext4_load_journal+0x440/0x860 [ext4]
>> [ 376.906059][T27575] [c000200aaeb0f9c0] [c008000010bf2a14] ext4_fill_super+0x342c/0x3ab0 [ext4]
>> [ 376.906086][T27575] [c000200aaeb0fb30] [c0000000004ce0ec] mount_bdev+0x25c/0x290
>> [ 376.906107][T27575] [c000200aaeb0fbd0] [c008000010be0250] ext4_mount+0x28/0x50 [ext4]
>> [ 376.906143][T27575] [c000200aaeb0fbf0] [c0000000005353cc] legacy_get_tree+0x4c/0xb0
>> [ 376.906177][T27575] [c000200aaeb0fc20] [c0000000004cb67c] vfs_get_tree+0x4c/0x130
>> [ 376.906213][T27575] [c000200aaeb0fc90] [c00000000050d1f8] do_mount+0xa18/0xc50
>> [ 376.906257][T27575] [c000200aaeb0fd60] [c00000000050d9d8] sys_mount+0x158/0x180
>> [ 376.906307][T27575] [c000200aaeb0fdb0] [c00000000003cc30] system_call_exception+0x110/0x1e0
>> [ 376.906334][T27575] [c000200aaeb0fe20] [c00000000000c9f0] system_call_common+0xf0/0x278
>> [ 376.906367][T27575] Instruction dump:
>> [ 376.906387][T27575] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
>> [ 376.906434][T27575] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
>> [ 376.906472][T27575] ---[ end trace fa91408cebc70be1 ]---
>> [ 377.389381][T27575]
>> [ 378.389480][T27575] Kernel panic - not syncing: Fatal exception
>> [ 379.824028][
>>>
>>> [ 206.744625][T13224] LTP: starting fallocate04
>>> [ 207.601583][T27684] /dev/zero: Can't open blockdev
>>> [ 208.674301][T27684] EXT4-fs (loop0): mounting ext3 file system using the ext4 subsystem
>>> [ 208.680347][T27684] BUG: Unable to handle kernel instruction fetch (NULL pointer?)
>>> [ 208.680383][T27684] Faulting instruction address: 0x00000000
>>> [ 208.680406][T27684] Oops: Kernel access of bad area, sig: 11 [#1]
>>> [ 208.680439][T27684] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=256 DEBUG_PAGEALLOC NUMA PowerNV
>>> [ 208.680474][T27684] Modules linked in: ext4 crc16 mbcache jbd2 loop kvm_hv kvm ip_tables x_tables xfs sd_mod bnx2x ahci libahci mdio tg3 libata libphy firmware_class dm_mirror dm_region_hash dm_log dm_mod
>>> [ 208.680576][T27684] CPU: 117 PID: 27684 Comm: fallocate04 Tainted: G W 5.6.0-next-20200401+ #288
>>> [ 208.680614][T27684] NIP: 0000000000000000 LR: c0080000102c0048 CTR: 0000000000000000
>>> [ 208.680657][T27684] REGS: c000200361def420 TRAP: 0400 Tainted: G W (5.6.0-next-20200401+)
>>> [ 208.680700][T27684] MSR: 900000004280b033 <SF,HV,VEC,VSX,EE,FP,ME,IR,DR,RI,LE> CR: 42022228 XER: 20040000
>>> [ 208.680760][T27684] CFAR: c00800001032c494 IRQMASK: 0
>>> [ 208.680760][T27684] GPR00: c0000000005ac3f8 c000200361def6b0 c00000000165c200 c00020107dae0bd0
>>> [ 208.680760][T27684] GPR04: 0000000000000000 0000000000000400 0000000000000000 0000000000000000
>>> [ 208.680760][T27684] GPR08: c000200361def6e8 c0080000102c0040 000000007fffffff c000000001614e80
>>> [ 208.680760][T27684] GPR12: 0000000000000000 c000201fff671280 0000000000000000 0000000000000002
>>> [ 208.680760][T27684] GPR16: 0000000000000002 0000000000040001 c00020030f5a1000 c00020030f5a1548
>>> [ 208.680760][T27684] GPR20: c0000000015fbad8 c00000000168c654 c000200361def818 c0000000005b4c10
>>> [ 208.680760][T27684] GPR24: 0000000000000000 c0080000103365b8 c00020107dae0bd0 0000000000000400
>>> [ 208.680760][T27684] GPR28: c00000000168c3a8 0000000000000000 0000000000000000 0000000000000000
>>> [ 208.681014][T27684] NIP [0000000000000000] 0x0
>>> [ 208.681065][T27684] LR [c0080000102c0048] ext4_iomap_end+0x8/0x30 [ext4]
>>> [ 208.681091][T27684] Call Trace:
>>> [ 208.681129][T27684] [c000200361def6b0] [c0000000005ac3bc] iomap_apply+0x20c/0x920 (unreliable)
>>> iomap_apply at fs/iomap/apply.c:80 (discriminator 4)
>>> [ 208.681173][T27684] [c000200361def7f0] [c0000000005b4adc] iomap_bmap+0xfc/0x160
>>> iomap_bmap at fs/iomap/fiemap.c:142
>>> [ 208.681228][T27684] [c000200361def850] [c0080000102c2c1c] ext4_bmap+0xa4/0x180 [ext4]
>>> ext4_bmap at fs/ext4/inode.c:3213
>>> [ 208.681260][T27684] [c000200361def890] [c0000000004f71fc] bmap+0x4c/0x80
>>> [ 208.681281][T27684] [c000200361def8c0] [c00800000fdb0acc] jbd2_journal_init_inode+0x44/0x1a0 [jbd2]
>>> jbd2_journal_init_inode at fs/jbd2/journal.c:1255
>>> [ 208.681326][T27684] [c000200361def960] [c00800001031c808] ext4_load_journal+0x440/0x860 [ext4]
>>> [ 208.681371][T27684] [c000200361defa30] [c008000010322a14] ext4_fill_super+0x342c/0x3ab0 [ext4]
>>> [ 208.681414][T27684] [c000200361defba0] [c0000000004cb0bc] mount_bdev+0x25c/0x290
>>> [ 208.681478][T27684] [c000200361defc40] [c008000010310250] ext4_mount+0x28/0x50 [ext4]
>>> [ 208.681520][T27684] [c000200361defc60] [c00000000053242c] legacy_get_tree+0x4c/0xb0
>>> [ 208.681556][T27684] [c000200361defc90] [c0000000004c864c] vfs_get_tree+0x4c/0x130
>>> [ 208.681593][T27684] [c000200361defd00] [c00000000050a1c8] do_mount+0xa18/0xc50
>>> [ 208.681641][T27684] [c000200361defdd0] [c00000000050a9a8] sys_mount+0x158/0x180
>>> [ 208.681679][T27684] [c000200361defe20] [c00000000000b3f8] system_call+0x5c/0x68
>>> [ 208.681726][T27684] Instruction dump:
>>> [ 208.681747][T27684] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
>>> [ 208.681797][T27684] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
>>> [ 208.681839][T27684] ---[ end trace 4e9e2bab7f1d4048 ]---
>>> [ 208.802259][T27684]
>>> [ 209.802373][T27684] Kernel panic - not syncing: Fatal exception
>
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2020-04-07 2:33 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-04-01 12:38 spontaneous crash with "ext4: move ext4 bmap to use iomap infrastructure" Qian Cai
2020-04-01 14:41 ` Ritesh Harjani
2020-04-01 14:51 ` Qian Cai
2020-04-03 11:26 ` Qian Cai
2020-04-03 11:34 ` Ritesh Harjani
2020-04-07 2:33 ` Qian Cai
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