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* WARNING in loop_add
@ 2019-08-23  2:28 syzbot
  0 siblings, 0 replies; 6+ messages in thread
From: syzbot @ 2019-08-23  2:28 UTC (permalink / raw)
  To: akinobu.mita, akpm, axboe, dvyukov, gregkh, linux-block,
	linux-kernel, mhocko, syzkaller-bugs, torvalds

Hello,

syzbot found the following crash on:

HEAD commit:    bb7ba806 Merge tag 'for-linus' of git://git.kernel.org/pub..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1272e012600000
kernel config:  https://syzkaller.appspot.com/x/.config?x=6919752cc1b760b4
dashboard link: https://syzkaller.appspot.com/bug?extid=f41893bb8c45cd18cf08
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12aa5af2600000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=173eea1e600000

The bug was bisected to:

commit e41d58185f1444368873d4d7422f7664a68be61d
Author: Dmitry Vyukov <dvyukov@google.com>
Date:   Wed Jul 12 21:34:35 2017 +0000

     fault-inject: support systematic fault injection

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12979da6600000
final crash:    https://syzkaller.appspot.com/x/report.txt?x=11979da6600000
console output: https://syzkaller.appspot.com/x/log.txt?x=16979da6600000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+f41893bb8c45cd18cf08@syzkaller.appspotmail.com
Fixes: e41d58185f14 ("fault-inject: support systematic fault injection")

RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003
RBP: 00007fff862aa420 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000005 R14: 0000000000000000 R15: 0000000000000000
------------[ cut here ]------------
WARNING: CPU: 0 PID: 10346 at block/genhd.c:732  
__device_add_disk.cold+0x11/0x19e block/genhd.c:732
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 10346 Comm: syz-executor227 Not tainted 5.3.0-rc5+ #139
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS  
Google 01/01/2011
Call Trace:
  __dump_stack lib/dump_stack.c:77 [inline]
  dump_stack+0x172/0x1f0 lib/dump_stack.c:113
  panic+0x2dc/0x755 kernel/panic.c:219
  __warn.cold+0x20/0x4c kernel/panic.c:576
  report_bug+0x263/0x2b0 lib/bug.c:186
  fixup_bug arch/x86/kernel/traps.c:179 [inline]
  fixup_bug arch/x86/kernel/traps.c:174 [inline]
  do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272
  do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291
  invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1028
RIP: 0010:__device_add_disk.cold+0x11/0x19e block/genhd.c:732
Code: 41 bc f0 ff ff ff e8 ff c7 2c fe 48 8b 7d d0 e8 52 ed 7c fe e9 ba 7a  
ff ff e8 18 27 43 fe 48 c7 c7 40 c5 c4 87 e8 e0 c7 2c fe <0f> 0b e9 7b de  
ff ff e8 00 27 43 fe 48 c7 c7 40 c5 c4 87 e8 c8 c7
RSP: 0018:ffff88808899faf8 EFLAGS: 00010286
RAX: 0000000000000024 RBX: 00000000fffffff4 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815c2526 RDI: ffffed1011133f51
RBP: ffff88808899fc10 R08: 0000000000000024 R09: ffffed1015d060d1
R10: ffffed1015d060d0 R11: ffff8880ae830687 R12: ffff8880a9a895c0
R13: ffff8880a9a89650 R14: ffff88808899fbe8 R15: ffff8880a9a895c4
  device_add_disk+0x2b/0x40 block/genhd.c:754
  add_disk include/linux/genhd.h:429 [inline]
  loop_add+0x635/0x8d0 drivers/block/loop.c:2050
  loop_control_ioctl drivers/block/loop.c:2151 [inline]
  loop_control_ioctl+0x165/0x360 drivers/block/loop.c:2133
  vfs_ioctl fs/ioctl.c:46 [inline]
  file_ioctl fs/ioctl.c:509 [inline]
  do_vfs_ioctl+0xdb6/0x13e0 fs/ioctl.c:696
  ksys_ioctl+0xab/0xd0 fs/ioctl.c:713
  __do_sys_ioctl fs/ioctl.c:720 [inline]
  __se_sys_ioctl fs/ioctl.c:718 [inline]
  __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718
  do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296
  entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441319
Code: e8 5c ae 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7  
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff  
ff 0f 83 bb 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fff862aa408 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441319
RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003
RBP: 00007fff862aa420 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000005 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..


---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.

syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches

^ permalink raw reply	[flat|nested] 6+ messages in thread
* WARNING in loop_add
@ 2021-09-03  7:36 Hao Sun
  0 siblings, 0 replies; 6+ messages in thread
From: Hao Sun @ 2021-09-03  7:36 UTC (permalink / raw)
  To: axboe, linux-block; +Cc: linux-kernel

Hello,

When using Healer to fuzz the latest Linux kernel, the following crash
was triggered.

HEAD commit: 7d2a07b76933 Linux 5.14
git tree: upstream
console output:
https://drive.google.com/file/d/1lL94fy2uAtUMlfTnDDI6ooGLUGGvlDwl/view?usp=sharing
kernel config: https://drive.google.com/file/d/1XD9WYDViQLSXN7RGwH8AGGDvP9JvOghx/view?usp=sharing
C reproducer: https://drive.google.com/file/d/12LXTfEg30h-Y6s5smCLIP7Jtr3g6PFOK/view?usp=sharing
Syzlang reproducer:
https://drive.google.com/file/d/1mUCxjzeD5w2bOjuw80srDBwpCh0zSpdW/view?usp=sharing

If you fix this issue, please add the following tag to the commit:
Reported-by: Hao Sun <sunhao.th@gmail.com>

oop4: detected capacity change from 0 to 20480
ISOFS: Unable to identify CD-ROM format.
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 PID: 10131 Comm: syz-executor Not tainted 5.14.0 #25
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.13.0-1ubuntu1.1 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x8b/0xb3 lib/dump_stack.c:105
 fail_dump lib/fault-inject.c:52 [inline]
 should_fail.cold+0x5/0xa lib/fault-inject.c:146
 should_failslab+0x5/0x10 mm/slab_common.c:1326
 slab_pre_alloc_hook mm/slab.h:494 [inline]
 slab_alloc_node mm/slub.c:2880 [inline]
 slab_alloc mm/slub.c:2967 [inline]
 kmem_cache_alloc_trace+0x62/0x350 mm/slub.c:2984
 kmalloc include/linux/slab.h:591 [inline]
 kzalloc include/linux/slab.h:721 [inline]
 device_create_groups_vargs+0x8a/0x280 drivers/base/core.c:3996
 device_create+0xdf/0x120 drivers/base/core.c:4056
 bdi_register_va.part.0+0x9c/0x800 mm/backing-dev.c:871
 bdi_register_va mm/backing-dev.c:906 [inline]
 bdi_register+0x12a/0x140 mm/backing-dev.c:903
 __device_add_disk+0x923/0xd10 block/genhd.c:521
 add_disk include/linux/genhd.h:217 [inline]
 loop_add+0x6ec/0x8c0 drivers/block/loop.c:2395
 loop_control_ioctl+0x130/0x3c0 drivers/block/loop.c:2492
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:1069 [inline]
 __se_sys_ioctl fs/ioctl.c:1055 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:1055
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4739cd
Code: 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa 48 89 f8 48
89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d
01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6e331da198 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000059c0a0 RCX: 00000000004739cd
RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003
RBP: 00007f6e331da1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000030
R13: 00007ffe496b21bf R14: 00007ffe496b2360 R15: 00007f6e331da300
------------[ cut here ]------------
WARNING: CPU: 1 PID: 10131 at block/genhd.c:523
__device_add_disk+0xba9/0xd10 block/genhd.c:523
Modules linked in:
CPU: 1 PID: 10131 Comm: syz-executor Not tainted 5.14.0 #25
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.13.0-1ubuntu1.1 04/01/2014
RIP: 0010:__device_add_disk+0xba9/0xd10 block/genhd.c:523
Code: fd ff ff 4c 89 ef 89 44 24 28 e8 22 a5 f3 fd 8b 44 24 28 e9 6f
fd ff ff 4c 89 ef e8 a1 a4 f3 fd e9 d5 fd ff ff e8 f7 b6 ac fd <0f> 0b
e9 8c fd ff ff 48 8b 7c 24 08 e8 96 a4 f3 fd e9 0a f6 ff ff
RSP: 0018:ffffc90006527dc0 EFLAGS: 00010216
RAX: 0000000000027667 RBX: ffff888107d54ec0 RCX: 0000000000040000
RDX: ffffc90000889000 RSI: ffff888104715640 RDI: 0000000000000002
RBP: ffff888110beb400 R08: ffffffff83c84189 R09: 0000000000000000
R10: 0000000000000005 R11: fffffbfff17578ea R12: 0000000000000001
R13: ffff888107d5539c R14: ffff888110beb4a0 R15: 0000000000000000
FS:  00007f6e331da700(0000) GS:ffff888119f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005572256db150 CR3: 0000000104b9f006 CR4: 0000000000770ee0
PKRU: 55555554
Call Trace:
 add_disk include/linux/genhd.h:217 [inline]
 loop_add+0x6ec/0x8c0 drivers/block/loop.c:2395
 loop_control_ioctl+0x130/0x3c0 drivers/block/loop.c:2492
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:1069 [inline]
 __se_sys_ioctl fs/ioctl.c:1055 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:1055
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4739cd
Code: 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa 48 89 f8 48
89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d
01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6e331da198 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000059c0a0 RCX: 00000000004739cd
RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003
RBP: 00007f6e331da1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000030
R13: 00007ffe496b21bf R14: 00007ffe496b2360 R15: 00007f6e331da300

^ permalink raw reply	[flat|nested] 6+ messages in thread
* WARNING in loop_add
@ 2022-07-17 14:06 Wei Chen
  2022-07-17 14:40 ` Keith Busch
  0 siblings, 1 reply; 6+ messages in thread
From: Wei Chen @ 2022-07-17 14:06 UTC (permalink / raw)
  To: axboe, linux-kernel; +Cc: linux-block

Dear Linux Developer,

Recently when using our tool to fuzz kernel, the following crash was triggered:

HEAD commit: 64570fbc14f8 Linux 5.15-rc5
git tree: upstream
compiler: clang 12.0.0
console output:
https://drive.google.com/file/d/1JxspkioQiZrQQ9BwsRjm5KJVY6z2KCTW/view?usp=sharing
Syzlang reproducer:
https://drive.google.com/file/d/1b7QJc_OVw-U7ugxWyvisfMbyQe-aBjWZ/view?usp=sharing
C reproducer: https://drive.google.com/file/d/1ymwqhBp9VYd7jRdpcfwiqUSUV0BnzCC0/view?usp=sharing
kernel config: https://drive.google.com/file/d/1lNwvovjLNrcuyFGrg05IoSmgO5jaKBBJ/view?usp=sharing

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: Wei Chen <harperchen1110@gmail.com>

WARNING: CPU: 0 PID: 8479 at block/genhd.c:537 device_add_disk+0x8aa/0xf20
Modules linked in:
CPU: 0 PID: 8479 Comm: syz-executor Not tainted 5.15.0-rc5+ #14
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.13.0-1ubuntu1.1 04/01/2014
RIP: 0010:device_add_disk+0x8aa/0xf20
Code: 00 48 8b 44 24 10 89 18 e8 93 8e 6a fd 4c 89 e7 e8 7b 66 fb ff
4c 89 e7 e8 73 ca 03 00 45 31 f6 e9 b1 fe ff ff e8 76 8e 6a fd <0f> 0b
e9 96 fe ff ff e8 6a 8e 6a fd 0f 0b 41 be ea ff ff ff e9 93
RSP: 0018:ffffc9000b297d28 EFLAGS: 00010283
RAX: ffffffff841b4a0a RBX: 0000000000000007 RCX: 0000000000040000
RDX: ffffc90002211000 RSI: 000000000002f3b2 RDI: 000000000002f3b3
RBP: ffff88803017bb00 R08: ffffffff841b4899 R09: ffffed100c7864a2
R10: ffffed100c7864a2 R11: 0000000000000000 R12: ffff88802f915000
R13: 00000000ffffffea R14: 1ffff11005f22a00 R15: 1ffff11005f22a01
FS:  00007ff387033700(0000) GS:ffff888063c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f65c6510000 CR3: 0000000030409000 CR4: 0000000000750ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
Call Trace:
 loop_add+0x62d/0x8c0
 loop_control_ioctl+0x11d/0x770
 __se_sys_ioctl+0x10a/0x190
 do_syscall_64+0x3d/0xb0
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff389acac4d
Code: 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa 48 89 f8 48
89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d
01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff387032c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ff389bf10a0 RCX: 00007ff389acac4d
RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000004
RBP: 00007ff387032c90 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000026
R13: 00007fff0e90e49f R14: 00007fff0e90e640 R15: 00007ff387032dc0

Best,
Wei

^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2022-11-02 12:34 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-08-23  2:28 WARNING in loop_add syzbot
2021-09-03  7:36 Hao Sun
2022-07-17 14:06 Wei Chen
2022-07-17 14:40 ` Keith Busch
2022-11-02  7:02   ` Wei Chen
2022-11-02 12:34     ` Yu Kuai

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