* i386: selftests: vm: compaction_test: BUG: kernel NULL pointer dereference, address: 00000000
@ 2020-04-12 6:54 Naresh Kamboju
2020-04-12 21:41 ` Peter Xu
2020-04-13 17:53 ` Dave Hansen
0 siblings, 2 replies; 5+ messages in thread
From: Naresh Kamboju @ 2020-04-12 6:54 UTC (permalink / raw)
To: open list, open list:KERNEL SELFTEST FRAMEWORK, linux-mm
Cc: lkft-triage, Shuah Khan, Anders Roxell, Christophe Leroy,
Andrew Morton, Leonardo Bras, Michael Ellerman, Peter Xu,
Mike Rapoport, Arnd Bergmann, Jules Irenge, Huang, Ying,
Pankaj Gupta, Rik van Riel, Hugh Dickins, Minchan Kim,
Mel Gorman, Dave Hansen, Mateusz Nosek,
Sebastian Andrzej Siewior, Kees Cook, Vlastimil Babka
On Linux mainline kernel 5.6.0 running kselftest vm compaction_test on i386
kernel running on x86_64 devices we have noticed this Kernel BUG followed by
Kernel panic.
BUG: kernel NULL pointer dereference, address: 00000000
Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009
Steps to reproduce:
--------------------------
# cd /opt/kselftests/default-in-kernel/vm/
# ./compaction_test
[ 45.955706] kauditd_printk_skb: 15 callbacks suppressed
[ 45.955707] audit: type=1334 audit(1586671685.974:25): prog-id=13 op=UNLOAD
[ 45.968082] audit: type=1334 audit(1586671685.974:26): prog-id=12 op=UNLOAD
[ 46.008163] get_swap_device: Bad swap file entry 7007504a
[ 46.013647] BUG: kernel NULL pointer dereference, address: 00000000
[ 46.019918] #PF: supervisor read access in kernel mode
[ 46.025048] #PF: error_code(0x0000) - not-present page
[ 46.030181] *pde = 00000000
[ 46.033065] Oops: 0000 [#1] SMP
[ 46.036204] CPU: 0 PID: 324 Comm: systemd-journal Not tainted 5.6.0 #1
[ 46.042727] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
2.0b 07/27/2017
[ 46.050202] EIP: do_swap_page+0x172/0x9d0
[ 46.054213] Code: 00 8b 4d f0 65 33 0d 14 00 00 00 8b 45 e0 0f 85
6c 08 00 00 8d 65 f4 5b 5e 5f 5d c3 8d 74 26 00 8b 75 e4 89 f0 e8 9e
0e 02 00 <8b> 00 f6 c4 10 74 10 89 f0 e8 30 dd 01 00 83 f8 01 0f 84 a7
04 00
[ 46.072958] EAX: 00000000 EBX: f3739f28 ECX: f590e840 EDX: 00000000
[ 46.079214] ESI: 7007504a EDI: 00000000 EBP: f3739f08 ESP: f3739ed0
[ 46.085473] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010246
[ 46.092250] CR0: 80050033 CR2: 00000000 CR3: 33abb000 CR4: 003406d0
[ 46.098506] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[ 46.104763] DR6: fffe0ff0 DR7: 00000400
[ 46.108595] Call Trace:
[ 46.111040] ? lock_release+0x8a/0x260
[ 46.114792] handle_mm_fault+0x430/0xcf0
[ 46.118715] do_page_fault+0x1ab/0x620
[ 46.122472] ? vmalloc_sync+0x180/0x180
[ 46.126309] common_exception_read_cr2+0x15f/0x164
[ 46.131093] EIP: 0xb7d37e10
[ 46.133884] Code: Bad RIP value.
[ 46.137109] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2
[ 46.143373] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c
[ 46.149632] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206
[ 46.156420] Modules linked in: x86_pkg_temp_thermal fuse
[ 46.161729] CR2: 0000000000000000
[ 46.165041] ---[ end trace 27c0fb4a809b98f6 ]---
[ 46.169651] EIP: do_swap_page+0x172/0x9d0
[ 46.173656] Code: 00 8b 4d f0 65 33 0d 14 00 00 00 8b 45 e0 0f 85
6c 08 00 00 8d 65 f4 5b 5e 5f 5d c3 8d 74 26 00 8b 75 e4 89 f0 e8 9e
0e 02 00 <8b> 00 f6 c4 10 74 10 89 f0 e8 30 dd 01 00 83 f8 01 0f 84 a7
04 00
[ 46.192401] EAX: 00000000 EBX: f3739f28 ECX: f590e840 EDX: 00000000
[ 46.198656] ESI: 7007504a EDI: 00000000 EBP: f3739f08 ESP: f3739ed0
[ 46.204914] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010246
[ 46.211693] CR0: 80050033 CR2: b7d37e06 CR3: 33abb000 CR4: 003406d0
[ 46.217949] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[ 46.224206] DR6: fffe0ff0 DR7: 00000400
[ 46.228039] BUG: sleeping function called from invalid context at
/usr/src/kernel/include/linux/percpu-rwsem.h:49
[ 46.238290] in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid:
324, name: systemd-journal
[ 46.246801] INFO: lockdep is turned off.
[ 46.250717] irq event stamp: 433914
[ 46.254205] hardirqs last enabled at (433913): [<cb16040d>]
console_unlock+0x46d/0x600
[ 46.262203] hardirqs last disabled at (433914): [<cb0019dc>]
trace_hardirqs_off_thunk+0xc/0x10
[ 46.270807] softirqs last enabled at (433910): [<cbe07675>]
__do_softirq+0x2d5/0x3e2
[ 46.278625] softirqs last disabled at (433743): [<cb0a6645>]
call_on_stack+0x45/0x50
[ 46.286354] CPU: 0 PID: 324 Comm: systemd-journal Tainted: G D
5.6.0 #1
[ 46.294259] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
2.0b 07/27/2017
[ 46.301729] Call Trace:
[ 46.304174] dump_stack+0x6e/0x96
[ 46.307487] ___might_sleep+0x14d/0x240
[ 46.311323] __might_sleep+0x33/0x80
[ 46.314896] exit_signals+0x2a/0x2d0
[ 46.318475] do_exit+0x8e/0xb40
[ 46.321621] rewind_stack_do_exit+0x11/0x13
[ 46.325804] EIP: 0xb7d37e10
[ 46.328597] Code: Bad RIP value.
[ 46.331820] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2
[ 46.338078] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c
[ 46.344333] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206
[ 46.351270] swap_info_get: Bad swap file entry 7007742a
[ 46.356514] BUG: Bad page map in process systemd-journal
pte:0ee8543c pmd:8c4a6067
[ 46.364211] addr:b7ccc000 vm_flags:00000075 anon_vma:00000000
mapping:f41d87c0 index:178
[ 46.372302] file:libc-2.27.so fault:filemap_fault
mmap:nfs_file_mmap readpage:nfs_readpage
[ 46.380573] CPU: 0 PID: 324 Comm: systemd-journal Tainted: G D
W 5.6.0 #1
[ 46.388482] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
2.0b 07/27/2017
[ 46.395951] Call Trace:
[ 46.398397] dump_stack+0x6e/0x96
[ 46.401708] ? nfs_readpage_async+0x2f0/0x2f0
[ 46.406058] print_bad_pte+0x11d/0x1b0
[ 46.409804] ? read_cache_page_gfp+0x20/0x20
[ 46.414073] ? nfs_file_read+0xa0/0xa0
[ 46.417820] ? nfs_readpage_async+0x2f0/0x2f0
[ 46.422179] unmap_page_range+0x3fe/0x740
[ 46.426194] unmap_single_vma+0x60/0xc0
[ 46.430031] unmap_vmas+0xb3/0x140
[ 46.433437] exit_mmap+0x80/0x160
[ 46.436760] mmput+0x56/0x100
[ 46.439729] do_exit+0x2f8/0xb40
[ 46.442964] rewind_stack_do_exit+0x11/0x13
[ 46.447146] EIP: 0xb7d37e10
[ 46.449938] Code: Bad RIP value.
[ 46.453161] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2
[ 46.459417] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c
[ 46.465676] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206
[ 46.472488] swap_info_get: Bad swap file entry 7007772b
[ 46.477729] BUG: Bad page map in process systemd-journal
pte:0eee563c pmd:8c4a6067
[ 46.485389] addr:b7ccd000 vm_flags:00000075 anon_vma:00000000
mapping:f41d87c0 index:179
[ 46.493476] file:libc-2.27.so fault:filemap_fault
mmap:nfs_file_mmap readpage:nfs_readpage
[ 46.501740] CPU: 2 PID: 324 Comm: systemd-journal Tainted: G B D
W 5.6.0 #1
[ 46.509651] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
2.0b 07/27/2017
[ 46.517119] Call Trace:
[ 46.519578] dump_stack+0x6e/0x96
[ 46.522903] ? nfs_readpage_async+0x2f0/0x2f0
[ 46.527260] print_bad_pte+0x11d/0x1b0
[ 46.531006] ? read_cache_page_gfp+0x20/0x20
[ 46.535278] ? nfs_file_read+0xa0/0xa0
[ 46.539021] ? nfs_readpage_async+0x2f0/0x2f0
[ 46.543373] unmap_page_range+0x3fe/0x740
[ 46.547379] unmap_single_vma+0x60/0xc0
[ 46.551216] unmap_vmas+0xb3/0x140
[ 46.554625] exit_mmap+0x80/0x160
[ 46.557944] mmput+0x56/0x100
[ 46.560912] do_exit+0x2f8/0xb40
[ 46.564138] rewind_stack_do_exit+0x11/0x13
[ 46.568321] EIP: 0xb7d37e10
[ 46.571114] Code: Bad RIP value.
[ 46.574337] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2
[ 46.580594] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c
[ 46.586851] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206
[ 46.593641] swap_info_get: Bad swap file entry 7007762a
[ 46.598877] BUG: Bad page map in process systemd-journal
pte:0eec543c pmd:8c4a6067
[ 46.606530] addr:b7cce000 vm_flags:00000075 anon_vma:00000000
mapping:f41d87c0 index:17a
[ 46.614650] file:libc-2.27.so fault:filemap_fault
mmap:nfs_file_mmap readpage:nfs_readpage
[ 46.622907] CPU: 2 PID: 324 Comm: systemd-journal Tainted: G B D
W 5.6.0 #1
[ 46.630817] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
2.0b 07/27/2017
[ 46.638287] Call Trace:
[ 46.640733] dump_stack+0x6e/0x96
[ 46.644051] ? nfs_readpage_async+0x2f0/0x2f0
[ 46.648403] print_bad_pte+0x11d/0x1b0
[ 46.652147] ? read_cache_page_gfp+0x20/0x20
[ 46.656419] ? nfs_file_read+0xa0/0xa0
[ 46.660162] ? nfs_readpage_async+0x2f0/0x2f0
[ 46.664515] unmap_page_range+0x3fe/0x740
[ 46.668529] unmap_single_vma+0x60/0xc0
[ 46.672366] unmap_vmas+0xb3/0x140
[ 46.675766] exit_mmap+0x80/0x160
[ 46.679086] mmput+0x56/0x100
[ 46.682056] do_exit+0x2f8/0xb40
[ 46.685290] rewind_stack_do_exit+0x11/0x13
[ 46.689474] EIP: 0xb7d37e10
[ 46.692264] Code: Bad RIP value.
[ 46.695489] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2
[ 46.701753] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c
[ 46.708012] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206
[ 46.714810] swap_info_get: Bad swap file entry 7007522f
[ 46.720035] BUG: Bad page map in process systemd-journal
pte:0ea45e3c pmd:8c4a6067
[ 46.727686] addr:b7d35000 vm_flags:00000075 anon_vma:00000000
mapping:f41d2ac0 index:e
[ 46.735602] file:libpthread-2.27.so fault:filemap_fault
mmap:nfs_file_mmap readpage:nfs_readpage
[ 46.744380] CPU: 2 PID: 324 Comm: systemd-journal Tainted: G B D
W 5.6.0 #1
[ 46.752287] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
2.0b 07/27/2017
[ 46.759759] Call Trace:
[ 46.762203] dump_stack+0x6e/0x96
[ 46.765514] ? nfs_readpage_async+0x2f0/0x2f0
[ 46.769866] print_bad_pte+0x11d/0x1b0
[ 46.773617] ? read_cache_page_gfp+0x20/0x20
[ 46.777882] ? nfs_file_read+0xa0/0xa0
[ 46.781624] ? nfs_readpage_async+0x2f0/0x2f0
[ 46.785976] unmap_page_range+0x3fe/0x740
[ 46.789982] unmap_single_vma+0x60/0xc0
[ 46.793819] unmap_vmas+0xb3/0x140
[ 46.797218] exit_mmap+0x80/0x160
[ 46.800538] mmput+0x56/0x100
[ 46.803509] do_exit+0x2f8/0xb40
[ 46.806736] rewind_stack_do_exit+0x11/0x13
[ 46.810918] EIP: 0xb7d37e10
[ 46.813710] Code: Bad RIP value.
[ 46.816940] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2
[ 46.823197] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c
[ 46.829457] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206
[ 46.836248] swap_info_get: Bad swap file entry 7007504a
[ 46.841477] BUG: Bad page map in process systemd-journal
pte:0ea0943c pmd:8c4a6067
[ 46.849131] addr:b7d37000 vm_flags:00000075 anon_vma:00000000
mapping:f41d2ac0 index:10
[ 46.857132] file:libpthread-2.27.so fault:filemap_fault
mmap:nfs_file_mmap readpage:nfs_readpage
[ 46.865913] CPU: 2 PID: 324 Comm: systemd-journal Tainted: G B D
W 5.6.0 #1
[ 46.873820] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
2.0b 07/27/2017
[ 46.881290] Call Trace:
[ 46.883736] dump_stack+0x6e/0x96
[ 46.887056] ? nfs_readpage_async+0x2f0/0x2f0
[ 46.891413] print_bad_pte+0x11d/0x1b0
[ 46.895159] ? read_cache_page_gfp+0x20/0x20
[ 46.899429] ? nfs_file_read+0xa0/0xa0
[ 46.903175] ? nfs_readpage_async+0x2f0/0x2f0
[ 46.907533] unmap_page_range+0x3fe/0x740
[ 46.911539] unmap_single_vma+0x60/0xc0
[ 46.915378] unmap_vmas+0xb3/0x140
[ 46.918784] exit_mmap+0x80/0x160
[ 46.922105] mmput+0x56/0x100
[ 46.925074] do_exit+0x2f8/0xb40
[ 46.928300] rewind_stack_do_exit+0x11/0x13
[ 46.932485] EIP: 0xb7d37e10
[ 46.935276] Code: Bad RIP value.
[ 46.938507] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2
[ 46.944763] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c
[ 46.951023] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206
[ 46.957836] swap_info_get: Bad swap file entry 70073aa6
[ 46.963124] BUG: Bad page map in process systemd-journal
pte:0e754c3c pmd:8c4a6067
[ 46.970785] addr:b7dd9000 vm_flags:00000075 anon_vma:00000000
mapping:f5008c20 index:8f
[ 46.978800] file:libsystemd-shared-237.so fault:filemap_fault
mmap:nfs_file_mmap readpage:nfs_readpage
[ 46.988111] CPU: 2 PID: 324 Comm: systemd-journal Tainted: G B D
W 5.6.0 #1
[ 46.996044] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
2.0b 07/27/2017
[ 47.003514] Call Trace:
[ 47.005959] dump_stack+0x6e/0x96
[ 47.009269] ? nfs_readpage_async+0x2f0/0x2f0
[ 47.013621] print_bad_pte+0x11d/0x1b0
[ 47.017364] ? read_cache_page_gfp+0x20/0x20
[ 47.021629] ? nfs_file_read+0xa0/0xa0
[ 47.025372] ? nfs_readpage_async+0x2f0/0x2f0
[ 47.029725] unmap_page_range+0x3fe/0x740
[ 47.033740] unmap_single_vma+0x60/0xc0
[ 47.037576] unmap_vmas+0xb3/0x140
[ 47.040975] exit_mmap+0x80/0x160
[ 47.044295] mmput+0x56/0x100
[ 47.047266] do_exit+0x2f8/0xb40
[ 47.050498] rewind_stack_do_exit+0x11/0x13
[ 47.054673] EIP: 0xb7d37e10
[ 47.057467] Code: Bad RIP value.
[ 47.060696] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2
[ 47.066953] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c
[ 47.073211] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206
[ 47.080067] swap_info_get: Bad swap file entry 7007522e
[ 47.085318] BUG: Bad page map in process systemd-journal
pte:0ea45c3c pmd:8c4a6067
[ 47.092977] addr:b7e79000 vm_flags:00000075 anon_vma:00000000
mapping:f5008c20 index:12f
[ 47.101065] file:libsystemd-shared-237.so fault:filemap_fault
mmap:nfs_file_mmap readpage:nfs_readpage
[ 47.110370] CPU: 3 PID: 324 Comm: systemd-journal Tainted: G B D
W 5.6.0 #1
[ 47.118280] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
2.0b 07/27/2017
[ 47.125749] Call Trace:
[ 47.128195] dump_stack+0x6e/0x96
[ 47.131514] ? nfs_readpage_async+0x2f0/0x2f0
[ 47.135871] print_bad_pte+0x11d/0x1b0
[ 47.139616] ? read_cache_page_gfp+0x20/0x20
[ 47.143880] ? nfs_file_read+0xa0/0xa0
[ 47.147623] ? nfs_readpage_async+0x2f0/0x2f0
[ 47.151977] unmap_page_range+0x3fe/0x740
[ 47.155990] unmap_single_vma+0x60/0xc0
[ 47.159827] unmap_vmas+0xb3/0x140
[ 47.163226] exit_mmap+0x80/0x160
[ 47.166547] mmput+0x56/0x100
[ 47.169516] do_exit+0x2f8/0xb40
[ 47.172749] rewind_stack_do_exit+0x11/0x13
[ 47.176935] EIP: 0xb7d37e10
[ 47.179725] Code: Bad RIP value.
[ 47.182948] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2
[ 47.189204] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c
[ 47.195464] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206
[ 47.202272] swap_info_get: Bad swap file entry 70077d2b
[ 47.207505] BUG: Bad page map in process systemd-journal
pte:0efa563c pmd:8c4a6067
[ 47.215165] addr:b7e9e000 vm_flags:00000075 anon_vma:00000000
mapping:f5008c20 index:154
[ 47.223253] file:libsystemd-shared-237.so fault:filemap_fault
mmap:nfs_file_mmap readpage:nfs_readpage
[ 47.232551] CPU: 3 PID: 324 Comm: systemd-journal Tainted: G B D
W 5.6.0 #1
[ 47.240459] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
2.0b 07/27/2017
[ 47.247930] Call Trace:
[ 47.250374] dump_stack+0x6e/0x96
[ 47.253686] ? nfs_readpage_async+0x2f0/0x2f0
[ 47.258036] print_bad_pte+0x11d/0x1b0
[ 47.261780] ? read_cache_page_gfp+0x20/0x20
[ 47.266045] ? nfs_file_read+0xa0/0xa0
[ 47.269788] ? nfs_readpage_async+0x2f0/0x2f0
[ 47.274141] unmap_page_range+0x3fe/0x740
[ 47.278154] unmap_single_vma+0x60/0xc0
[ 47.281991] unmap_vmas+0xb3/0x140
[ 47.285390] exit_mmap+0x80/0x160
[ 47.288710] mmput+0x56/0x100
[ 47.291681] do_exit+0x2f8/0xb40
[ 47.294915] rewind_stack_do_exit+0x11/0x13
[ 47.299098] EIP: 0xb7d37e10
[ 47.301888] Code: Bad RIP value.
[ 47.305111] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2
[ 47.311370] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c
[ 47.317628] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206
[ 47.324413] swap_info_get: Bad swap file entry 70077f2b
[ 47.329650] BUG: Bad page map in process systemd-journal
pte:0efe563c pmd:8c4a6067
[ 47.337303] addr:b7e9f000 vm_flags:00000075 anon_vma:00000000
mapping:f5008c20 index:155
[ 47.345392] file:libsystemd-shared-237.so fault:filemap_fault
mmap:nfs_file_mmap readpage:nfs_readpage
[ 47.354689] CPU: 3 PID: 324 Comm: systemd-journal Tainted: G B D
W 5.6.0 #1
[ 47.362597] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
2.0b 07/27/2017
[ 47.370067] Call Trace:
[ 47.372512] dump_stack+0x6e/0x96
[ 47.375824] ? nfs_readpage_async+0x2f0/0x2f0
[ 47.380174] print_bad_pte+0x11d/0x1b0
[ 47.383920] ? read_cache_page_gfp+0x20/0x20
[ 47.388191] ? nfs_file_read+0xa0/0xa0
[ 47.391936] ? nfs_readpage_async+0x2f0/0x2f0
[ 47.396295] unmap_page_range+0x3fe/0x740
[ 47.400301] unmap_single_vma+0x60/0xc0
[ 47.404139] unmap_vmas+0xb3/0x140
[ 47.407545] exit_mmap+0x80/0x160
[ 47.410866] mmput+0x56/0x100
[ 47.413836] do_exit+0x2f8/0xb40
[ 47.417062] rewind_stack_do_exit+0x11/0x13
[ 47.421246] EIP: 0xb7d37e10
[ 47.424037] Code: Bad RIP value.
[ 47.427267] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2
[ 47.433527] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c
[ 47.439783] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206
[ 47.446566] swap_info_get: Bad swap file entry 70077a2a
[ 47.451800] BUG: Bad page map in process systemd-journal
pte:0ef4543c pmd:8c4a6067
[ 47.459450] addr:b7ea0000 vm_flags:00000075 anon_vma:00000000
mapping:f5008c20 index:156
[ 47.467539] file:libsystemd-shared-237.so fault:filemap_fault
mmap:nfs_file_mmap readpage:nfs_readpage
[ 47.476836] CPU: 3 PID: 324 Comm: systemd-journal Tainted: G B D
W 5.6.0 #1
[ 47.484745] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
2.0b 07/27/2017
[ 47.492214] Call Trace:
[ 47.494660] dump_stack+0x6e/0x96
[ 47.497970] ? nfs_readpage_async+0x2f0/0x2f0
[ 47.502323] print_bad_pte+0x11d/0x1b0
[ 47.506076] ? read_cache_page_gfp+0x20/0x20
[ 47.510345] ? nfs_file_read+0xa0/0xa0
[ 47.514091] ? nfs_readpage_async+0x2f0/0x2f0
[ 47.518442] unmap_page_range+0x3fe/0x740
[ 47.522458] unmap_single_vma+0x60/0xc0
[ 47.526294] unmap_vmas+0xb3/0x140
[ 47.529693] exit_mmap+0x80/0x160
[ 47.533012] mmput+0x56/0x100
[ 47.535982] do_exit+0x2f8/0xb40
[ 47.539207] rewind_stack_do_exit+0x11/0x13
[ 47.543384] EIP: 0xb7d37e10
[ 47.546172] Code: Bad RIP value.
[ 47.549396] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2
[ 47.555657] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c
[ 47.561920] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206
[ 47.568712] swap_info_get: Bad swap file entry 7007444a
[ 47.573944] BUG: Bad page map in process systemd-journal
pte:0e88943c pmd:8c4a6067
[ 47.581598] addr:b7f81000 vm_flags:00000875 anon_vma:00000000
mapping:f5008360 index:4
[ 47.589510] file:ld-2.27.so fault:filemap_fault mmap:nfs_file_mmap
readpage:nfs_readpage
[ 47.597597] CPU: 3 PID: 324 Comm: systemd-journal Tainted: G B D
W 5.6.0 #1
[ 47.605505] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
2.0b 07/27/2017
[ 47.612974] Call Trace:
[ 47.615419] dump_stack+0x6e/0x96
[ 47.618731] ? nfs_readpage_async+0x2f0/0x2f0
[ 47.623083] print_bad_pte+0x11d/0x1b0
[ 47.626834] ? read_cache_page_gfp+0x20/0x20
[ 47.631099] ? nfs_file_read+0xa0/0xa0
[ 47.634843] ? nfs_readpage_async+0x2f0/0x2f0
[ 47.639201] unmap_page_range+0x3fe/0x740
[ 47.643209] unmap_single_vma+0x60/0xc0
[ 47.647045] unmap_vmas+0xb3/0x140
[ 47.650445] exit_mmap+0x80/0x160
[ 47.653764] mmput+0x56/0x100
[ 47.656735] do_exit+0x2f8/0xb40
[ 47.659969] rewind_stack_do_exit+0x11/0x13
[ 47.664150] EIP: 0xb7d37e10
[ 47.666941] Code: Bad RIP value.
[ 47.670166] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2
[ 47.676425] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c
[ 47.682682] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206
[ 47.689464] swap_info_get: Bad swap file entry 700742c6
[ 47.694686] BUG: Bad page map in process systemd-journal
pte:0e858c3c pmd:8c4a6067
[ 47.702339] addr:b7f82000 vm_flags:00000875 anon_vma:00000000
mapping:f5008360 index:5
[ 47.710255] file:ld-2.27.so fault:filemap_fault mmap:nfs_file_mmap
readpage:nfs_readpage
[ 47.718338] CPU: 3 PID: 324 Comm: systemd-journal Tainted: G B D
W 5.6.0 #1
[ 47.726248] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
2.0b 07/27/2017
[ 47.733718] Call Trace:
[ 47.736163] dump_stack+0x6e/0x96
[ 47.739473] ? nfs_readpage_async+0x2f0/0x2f0
[ 47.743824] print_bad_pte+0x11d/0x1b0
[ 47.747570] ? read_cache_page_gfp+0x20/0x20
[ 47.751841] ? nfs_file_read+0xa0/0xa0
[ 47.755585] ? nfs_readpage_async+0x2f0/0x2f0
[ 47.759937] unmap_page_range+0x3fe/0x740
[ 47.763953] unmap_single_vma+0x60/0xc0
[ 47.767789] unmap_vmas+0xb3/0x140
[ 47.771196] exit_mmap+0x80/0x160
[ 47.774515] mmput+0x56/0x100
[ 47.777485] do_exit+0x2f8/0xb40
[ 47.780712] rewind_stack_do_exit+0x11/0x13
[ 47.784896] EIP: 0xb7d37e10
[ 47.787694] Code: Bad RIP value.
[ 47.790918] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2
[ 47.797176] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c
[ 47.803432] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206
[ 47.810255] BUG: Bad rss-counter state mm:6923ef64 type:MM_FILEPAGES val:12
[ 47.817226] BUG: Bad rss-counter state mm:6923ef64 type:MM_SWAPENTS val:-12
[ 47.832458] get_swap_device: Bad swap file entry 7007a82a
[ 47.837875] BUG: kernel NULL pointer dereference, address: 00000000
[ 47.844150] #PF: supervisor read access in kernel mode
[ 47.849289] #PF: error_code(0x0000) - not-present page
[ 47.854427] *pde = 00000000
[ 47.857304] Oops: 0000 [#2] SMP
[ 47.860444] CPU: 1 PID: 1 Comm: systemd Tainted: G B D W 5.6.0 #1
[ 47.867488] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
2.0b 07/27/2017
[ 47.874962] EIP: do_swap_page+0x172/0x9d0
[ 47.878971] Code: 00 8b 4d f0 65 33 0d 14 00 00 00 8b 45 e0 0f 85
6c 08 00 00 8d 65 f4 5b 5e 5f 5d c3 8d 74 26 00 8b 75 e4 89 f0 e8 9e
0e 02 00 <8b> 00 f6 c4 10 74 10 89 f0 e8 30 dd 01 00 83 f8 01 0f 84 a7
04 00
[ 47.897707] EAX: 00000000 EBX: f555df28 ECX: cb161967 EDX: 00000000
[ 47.903964] ESI: 7007a82a EDI: 00000000 EBP: f555df08 ESP: f555ded0
[ 47.910223] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010246
[ 47.917001] CR0: 80050033 CR2: 00000000 CR3: 3313b000 CR4: 003406d0
[ 47.923257] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[ 47.929515] DR6: fffe0ff0 DR7: 00000400
[ 47.933344] Call Trace:
[ 47.935790] ? handle_mm_fault+0xca/0xcf0
[ 47.939804] handle_mm_fault+0x430/0xcf0
[ 47.943731] ? security_file_free+0x4e/0x60
[ 47.947918] do_page_fault+0x1ab/0x620
[ 47.951669] ? vmalloc_sync+0x180/0x180
[ 47.955505] common_exception_read_cr2+0x15f/0x164
[ 47.960289] EIP: 0xb7a3d0f6
[ 47.963081] Code: c0 74 08 38 d8 75 04 39 fe 75 e9 0f b6 fb 5b 29
f8 5e 5f c3 56 57 8b 7c 24 0c 31 c0 89 f9 83 e1 3f 66 0f ef c0 83 f9
30 77 17 <f3> 0f 6f 0f 66 0f 74 c1 66 0f d7 d0 85 d2 75 73 89 f8 83 e0
f0 eb
[ 47.981816] EAX: 00000000 EBX: b7ed02e4 ECX: 00000025 EDX: 012e13dc
[ 47.988073] ESI: 005c34a5 EDI: 005c34a5 EBP: 005c34a5 ESP: bfe689d4
[ 47.994332] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010287
[ 48.001111] Modules linked in: x86_pkg_temp_thermal fuse
[ 48.006424] CR2: 0000000000000000
[ 48.009742] ---[ end trace 27c0fb4a809b98f7 ]---
[ 48.014362] EIP: do_swap_page+0x172/0x9d0
[ 48.018373] Code: 00 8b 4d f0 65 33 0d 14 00 00 00 8b 45 e0 0f 85
6c 08 00 00 8d 65 f4 5b 5e 5f 5d c3 8d 74 26 00 8b 75 e4 89 f0 e8 9e
0e 02 00 <8b> 00 f6 c4 10 74 10 89 f0 e8 30 dd 01 00 83 f8 01 0f 84 a7
04 00
[ 48.037111] EAX: 00000000 EBX: f3739f28 ECX: f590e840 EDX: 00000000
[ 48.043367] ESI: 7007504a EDI: 00000000 EBP: f3739f08 ESP: f3739ed0
[ 48.049624] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010246
[ 48.056402] CR0: 80050033 CR2: 00000000 CR3: 3313b000 CR4: 003406d0
[ 48.062658] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[ 48.068916] DR6: fffe0ff0 DR7: 00000400
[ 48.072746] BUG: sleeping function called from invalid context at
/usr/src/kernel/include/linux/percpu-rwsem.h:49
[ 48.082990] in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid:
1, name: systemd
[ 48.090634] INFO: lockdep is turned off.
[ 48.094576] irq event stamp: 2162056
[ 48.098150] hardirqs last enabled at (2162055): [<cbe036a2>]
_raw_write_unlock_irq+0x22/0x30
[ 48.106670] hardirqs last disabled at (2162056): [<cbdfcc4f>]
__schedule+0xbf/0x970
[ 48.114322] softirqs last enabled at (2161816): [<cbc34343>]
unix_sock_destructor+0x63/0x100
[ 48.122831] softirqs last disabled at (2161814): [<cbc34343>]
unix_sock_destructor+0x63/0x100
[ 48.131341] CPU: 1 PID: 1 Comm: systemd Tainted: G B D W 5.6.0 #1
[ 48.138378] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
2.0b 07/27/2017
[ 48.145849] Call Trace:
[ 48.148294] dump_stack+0x6e/0x96
[ 48.151606] ___might_sleep+0x14d/0x240
[ 48.155438] __might_sleep+0x33/0x80
[ 48.159017] exit_signals+0x2a/0x2d0
[ 48.162596] do_exit+0x8e/0xb40
[ 48.165741] rewind_stack_do_exit+0x11/0x13
[ 48.169916] EIP: 0xb7a3d0f6
[ 48.172709] Code: c0 74 08 38 d8 75 04 39 fe 75 e9 0f b6 fb 5b 29
f8 5e 5f c3 56 57 8b 7c 24 0c 31 c0 89 f9 83 e1 3f 66 0f ef c0 83 f9
30 77 17 <f3> 0f 6f 0f 66 0f 74 c1 66 0f d7 d0 85 d2 75 73 89 f8 83 e0
f0 eb
[ 48.191452] EAX: 00000000 EBX: b7ed02e4 ECX: 00000025 EDX: 012e13dc
[ 48.197711] ESI: 005c34a5 EDI: 005c34a5 EBP: 005c34a5 ESP: bfe689d4
[ 48.203968] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010287
[ 48.210748] Kernel panic - not syncing: Attempted to kill init!
exitcode=0x00000009
[ 48.218422] Kernel Offset: 0xa000000 from 0xc1000000 (relocation
range: 0xc0000000-0xf77fdfff)
[ 48.227030] ---[ end Kernel panic - not syncing: Attempted to kill
init! exitcode=0x00000009 ]---
git repo: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git branch: master
kernel-config: http://snapshots.linaro.org/openembedded/lkft/lkft/sumo/intel-core2-32/lkft/linux-mainline/2606/config
git log --oneline compaction.c
77337edee759 mm/compaction: add missing annotation for compact_lock_irqsave
9de4f22a60f7 mm: code cleanup for MADV_FREE
250046e7ba2a mm/compaction.c: clean code by removing unnecessary assignment
6923aa0d8c62 mm/compaction: Disable compact_unevictable_allowed on RT
6467552ca64c mm, compaction: fully assume capture is not NULL in
compact_zone_order()
1da2f328fa64 mm,thp,compaction,cma: allow THP migration for CMA allocations
a2e9a5afce08 mm, compaction: fix wrong pfn handling in __reset_isolation_pfn()
32aaf0553df9 mm/compaction.c: remove unnecessary zone parameter in
isolate_migratepages()
a94b525241c0 mm/compaction.c: clear total_{migrate,free}_scanned
before scanning a new zone
d8c6546b1aea mm: introduce compound_nr()
full test log,
https://lkft.validation.linaro.org/scheduler/job/1360870
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
--
Linaro LKFT
https://lkft.linaro.org
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: i386: selftests: vm: compaction_test: BUG: kernel NULL pointer dereference, address: 00000000
2020-04-12 6:54 i386: selftests: vm: compaction_test: BUG: kernel NULL pointer dereference, address: 00000000 Naresh Kamboju
@ 2020-04-12 21:41 ` Peter Xu
2020-04-13 11:21 ` Naresh Kamboju
2020-04-13 17:53 ` Dave Hansen
1 sibling, 1 reply; 5+ messages in thread
From: Peter Xu @ 2020-04-12 21:41 UTC (permalink / raw)
To: Naresh Kamboju
Cc: open list, open list:KERNEL SELFTEST FRAMEWORK, linux-mm,
lkft-triage, Shuah Khan, Anders Roxell, Christophe Leroy,
Andrew Morton, Leonardo Bras, Michael Ellerman, Mike Rapoport,
Arnd Bergmann, Jules Irenge, Huang, Ying, Pankaj Gupta,
Rik van Riel, Hugh Dickins, Minchan Kim, Mel Gorman, Dave Hansen,
Mateusz Nosek, Sebastian Andrzej Siewior, Kees Cook,
Vlastimil Babka, Hillf Danton
Hi, Naresh,
On Sun, Apr 12, 2020 at 12:24:57PM +0530, Naresh Kamboju wrote:
> On Linux mainline kernel 5.6.0 running kselftest vm compaction_test on i386
> kernel running on x86_64 devices we have noticed this Kernel BUG followed by
> Kernel panic.
>
> BUG: kernel NULL pointer dereference, address: 00000000
> Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009
>
> Steps to reproduce:
> --------------------------
> # cd /opt/kselftests/default-in-kernel/vm/
> # ./compaction_test
>
> [ 45.955706] kauditd_printk_skb: 15 callbacks suppressed
> [ 45.955707] audit: type=1334 audit(1586671685.974:25): prog-id=13 op=UNLOAD
> [ 45.968082] audit: type=1334 audit(1586671685.974:26): prog-id=12 op=UNLOAD
> [ 46.008163] get_swap_device: Bad swap file entry 7007504a
> [ 46.013647] BUG: kernel NULL pointer dereference, address: 00000000
I suspect this is the same issue with:
https://lore.kernel.org/lkml/20200410002518.GG8179@shao2-debian/
And since this one is very easy to reproduce, I finally noticed that
we have wrongly enabled uffd-wp on x86_32, which is definely not going
to work... Because we'll use bit 2 of swap entry assuming that's the
uffd-wp bit, while that's part of swp offset on 32bit systems.
Naresh, could you try whether below change fixes the issue for you?
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 8d078642b4be..7ac524d1316e 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -149,7 +149,7 @@ config X86
select HAVE_ARCH_TRACEHOOK
select HAVE_ARCH_TRANSPARENT_HUGEPAGE
select HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD if X86_64
- select HAVE_ARCH_USERFAULTFD_WP if USERFAULTFD
+ select HAVE_ARCH_USERFAULTFD_WP if X86_64 && USERFAULTFD
select HAVE_ARCH_VMAP_STACK if X86_64
select HAVE_ARCH_WITHIN_STACK_FRAMES
select HAVE_ASM_MODVERSIONS
Thanks,
--
Peter Xu
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: i386: selftests: vm: compaction_test: BUG: kernel NULL pointer dereference, address: 00000000
2020-04-12 21:41 ` Peter Xu
@ 2020-04-13 11:21 ` Naresh Kamboju
2020-04-13 14:14 ` Peter Xu
0 siblings, 1 reply; 5+ messages in thread
From: Naresh Kamboju @ 2020-04-13 11:21 UTC (permalink / raw)
To: Peter Xu
Cc: open list, open list:KERNEL SELFTEST FRAMEWORK, linux-mm,
lkft-triage, Shuah Khan, Anders Roxell, Christophe Leroy,
Andrew Morton, Leonardo Bras, Michael Ellerman, Mike Rapoport,
Arnd Bergmann, Jules Irenge, Huang, Ying, Pankaj Gupta,
Rik van Riel, Hugh Dickins, Minchan Kim, Mel Gorman, Dave Hansen,
Mateusz Nosek, Sebastian Andrzej Siewior, Kees Cook,
Vlastimil Babka, Hillf Danton
On Mon, 13 Apr 2020 at 03:12, Peter Xu <peterx@redhat.com> wrote:
> And since this one is very easy to reproduce, I finally noticed that
> we have wrongly enabled uffd-wp on x86_32, which is definely not going
> to work... Because we'll use bit 2 of swap entry assuming that's the
> uffd-wp bit, while that's part of swp offset on 32bit systems.
>
> Naresh, could you try whether below change fixes the issue for you?
>
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index 8d078642b4be..7ac524d1316e 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -149,7 +149,7 @@ config X86
> select HAVE_ARCH_TRACEHOOK
> select HAVE_ARCH_TRANSPARENT_HUGEPAGE
> select HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD if X86_64
> - select HAVE_ARCH_USERFAULTFD_WP if USERFAULTFD
> + select HAVE_ARCH_USERFAULTFD_WP if X86_64 && USERFAULTFD
> select HAVE_ARCH_VMAP_STACK if X86_64
> select HAVE_ARCH_WITHIN_STACK_FRAMES
> select HAVE_ASM_MODVERSIONS
>
Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org>
The above patch tested and did not notice the crash.
+ cd /opt/kselftests/default-in-kernel/vm/
+ ./compaction_test
No of huge pages allocated = 297
+ ./compaction_test
[ 46.059785] kauditd_printk_skb: 15 callbacks suppressed
[ 46.059786] audit: type=1334 audit(1586776582.927:25): prog-id=17 op=UNLOAD
[ 46.071997] audit: type=1334 audit(1586776582.927:26): prog-id=16 op=UNLOAD
No of huge pages allocated = 160
Full test log,
https://lkft.validation.linaro.org/scheduler/job/1362495#L1308
Build artifacts.
https://builds.tuxbuild.com/w0ol7cCsGan0wzPp7bNqkg/
- Naresh
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: i386: selftests: vm: compaction_test: BUG: kernel NULL pointer dereference, address: 00000000
2020-04-13 11:21 ` Naresh Kamboju
@ 2020-04-13 14:14 ` Peter Xu
0 siblings, 0 replies; 5+ messages in thread
From: Peter Xu @ 2020-04-13 14:14 UTC (permalink / raw)
To: Naresh Kamboju
Cc: open list, open list:KERNEL SELFTEST FRAMEWORK, linux-mm,
lkft-triage, Shuah Khan, Anders Roxell, Christophe Leroy,
Andrew Morton, Leonardo Bras, Michael Ellerman, Mike Rapoport,
Arnd Bergmann, Jules Irenge, Huang, Ying, Pankaj Gupta,
Rik van Riel, Hugh Dickins, Minchan Kim, Mel Gorman, Dave Hansen,
Mateusz Nosek, Sebastian Andrzej Siewior, Kees Cook,
Vlastimil Babka, Hillf Danton
On Mon, Apr 13, 2020 at 04:51:25PM +0530, Naresh Kamboju wrote:
> On Mon, 13 Apr 2020 at 03:12, Peter Xu <peterx@redhat.com> wrote:
> > And since this one is very easy to reproduce, I finally noticed that
> > we have wrongly enabled uffd-wp on x86_32, which is definely not going
> > to work... Because we'll use bit 2 of swap entry assuming that's the
> > uffd-wp bit, while that's part of swp offset on 32bit systems.
> >
> > Naresh, could you try whether below change fixes the issue for you?
> >
> > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> > index 8d078642b4be..7ac524d1316e 100644
> > --- a/arch/x86/Kconfig
> > +++ b/arch/x86/Kconfig
> > @@ -149,7 +149,7 @@ config X86
> > select HAVE_ARCH_TRACEHOOK
> > select HAVE_ARCH_TRANSPARENT_HUGEPAGE
> > select HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD if X86_64
> > - select HAVE_ARCH_USERFAULTFD_WP if USERFAULTFD
> > + select HAVE_ARCH_USERFAULTFD_WP if X86_64 && USERFAULTFD
> > select HAVE_ARCH_VMAP_STACK if X86_64
> > select HAVE_ARCH_WITHIN_STACK_FRAMES
> > select HAVE_ASM_MODVERSIONS
> >
>
> Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org>
>
> The above patch tested and did not notice the crash.
> + cd /opt/kselftests/default-in-kernel/vm/
> + ./compaction_test
> No of huge pages allocated = 297
> + ./compaction_test
> [ 46.059785] kauditd_printk_skb: 15 callbacks suppressed
> [ 46.059786] audit: type=1334 audit(1586776582.927:25): prog-id=17 op=UNLOAD
> [ 46.071997] audit: type=1334 audit(1586776582.927:26): prog-id=16 op=UNLOAD
> No of huge pages allocated = 160
>
> Full test log,
> https://lkft.validation.linaro.org/scheduler/job/1362495#L1308
>
> Build artifacts.
> https://builds.tuxbuild.com/w0ol7cCsGan0wzPp7bNqkg/
Thanks! I'll post a formal patch soon.
--
Peter Xu
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: i386: selftests: vm: compaction_test: BUG: kernel NULL pointer dereference, address: 00000000
2020-04-12 6:54 i386: selftests: vm: compaction_test: BUG: kernel NULL pointer dereference, address: 00000000 Naresh Kamboju
2020-04-12 21:41 ` Peter Xu
@ 2020-04-13 17:53 ` Dave Hansen
1 sibling, 0 replies; 5+ messages in thread
From: Dave Hansen @ 2020-04-13 17:53 UTC (permalink / raw)
To: Naresh Kamboju, open list, open list:KERNEL SELFTEST FRAMEWORK, linux-mm
Cc: lkft-triage, Shuah Khan, Anders Roxell, Christophe Leroy,
Andrew Morton, Leonardo Bras, Michael Ellerman, Peter Xu,
Mike Rapoport, Arnd Bergmann, Jules Irenge, Huang, Ying,
Pankaj Gupta, Rik van Riel, Hugh Dickins, Minchan Kim,
Mel Gorman, Dave Hansen, Mateusz Nosek,
Sebastian Andrzej Siewior, Kees Cook, Vlastimil Babka
On 4/11/20 11:54 PM, Naresh Kamboju wrote:
> On Linux mainline kernel 5.6.0 running kselftest vm compaction_test on i386
> kernel running on x86_64 devices we have noticed this Kernel BUG followed by
> Kernel panic.
Any chance we could talk you into doing a bisect on this sucker?
The "Bad swap file entry" message could be a lot of things.
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-- links below jump to the message on this page --
2020-04-12 6:54 i386: selftests: vm: compaction_test: BUG: kernel NULL pointer dereference, address: 00000000 Naresh Kamboju
2020-04-12 21:41 ` Peter Xu
2020-04-13 11:21 ` Naresh Kamboju
2020-04-13 14:14 ` Peter Xu
2020-04-13 17:53 ` Dave Hansen
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