[moderation] [bcachefs?] general protection fault in __bch2_btree_node_write
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syzbot
May 27, 2024, 4:14:23 AMMay 27
to syzkaller-upst...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: c760b3725e52 Merge tag 'mm-nonmm-stable-2024-05-22-17-30' ..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11ef0e44980000
kernel config: https://syzkaller.appspot.com/x/.config?x=2b8d1faad9ceb620
dashboard link: https://syzkaller.appspot.com/bug?extid=fc94f8f2007fe097c9a4
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: i386
CC: [bfo...@redhat.com kent.ov...@linux.dev linux-b...@vger.kernel.org linux-...@vger.kernel.org]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-c760b372.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/0237367631af/vmlinux-c760b372.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a9a84e3f8512/bzImage-c760b372.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+fc94f8...@syzkaller.appspotmail.com
bcachefs (loop0): alloc_read... done
bcachefs (loop0): stripes_read... done
bcachefs (loop0): snapshots_read... done
bcachefs (loop0): going read-write
bcachefs (loop0): journal_replay...
Oops: general protection fault, probably for non-canonical address 0xe01ffbf11005867e: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: maybe wild-memory-access in range [0x00ffff88802c33f0-0x00ffff88802c33f7]
CPU: 3 PID: 6039 Comm: syz-executor.0 Not tainted 6.9.0-syzkaller-11952-gc760b3725e52 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__lock_acquire+0xe3e/0x3b30 kernel/locking/lockdep.c:5005
Code: 11 00 00 39 05 a3 ff 1f 12 0f 82 be 05 00 00 ba 01 00 00 00 e9 e4 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 82 1f 00 00 49 81 3c 24 a0 6d e3 92 0f 84 98 f2
RSP: 0018:ffffc90003c56be0 EFLAGS: 00010007
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 001ffff11005867e RSI: ffff888020248000 RDI: 00ffff88802c33f7
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8fe2b0d7 R11: 0000000000000004 R12: 00ffff88802c33f7
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff88802c300000(0063) knlGS:00000000f5ea9b40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00005574da18aef8 CR3: 000000005c4d2000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
__queue_work+0x39e/0x1020 kernel/workqueue.c:2319
queue_work_on+0x11a/0x140 kernel/workqueue.c:2410
queue_work include/linux/workqueue.h:621 [inline]
__bch2_btree_node_write+0x1ec6/0x2ca0 fs/bcachefs/btree_io.c:2227
bch2_btree_node_write+0xaa/0x2f0 fs/bcachefs/btree_io.c:2302
btree_node_write_if_need fs/bcachefs/btree_io.h:151 [inline]
__btree_node_flush+0x2fb/0x3c0 fs/bcachefs/btree_trans_commit.c:250
journal_flush_pins.constprop.0+0x4b6/0xa50 fs/bcachefs/journal_reclaim.c:553
journal_flush_done+0x253/0x2c0 fs/bcachefs/journal_reclaim.c:809
bch2_journal_flush_pins+0x131/0x240 fs/bcachefs/journal_reclaim.c:839
bch2_journal_flush_all_pins fs/bcachefs/journal_reclaim.h:76 [inline]
bch2_journal_replay+0x1094/0x1390 fs/bcachefs/recovery.c:301
bch2_run_recovery_pass+0x8e/0x1a0 fs/bcachefs/recovery_passes.c:182
bch2_run_recovery_passes+0x33b/0x710 fs/bcachefs/recovery_passes.c:225
bch2_fs_recovery+0x259f/0x3b60 fs/bcachefs/recovery.c:804
bch2_fs_start+0x2e9/0x600 fs/bcachefs/super.c:1031
bch2_fs_open+0xde0/0x10f0 fs/bcachefs/super.c:2123
bch2_mount+0xd41/0x1090 fs/bcachefs/fs.c:1917
legacy_get_tree+0x109/0x220 fs/fs_context.c:662
vfs_get_tree+0x8f/0x380 fs/super.c:1780
do_new_mount fs/namespace.c:3352 [inline]
path_mount+0x6e1/0x1f10 fs/namespace.c:3679
do_mount fs/namespace.c:3692 [inline]
__do_sys_mount fs/namespace.c:3898 [inline]
__se_sys_mount fs/namespace.c:3875 [inline]
__ia32_sys_mount+0x295/0x320 fs/namespace.c:3875
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf72b7579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f5ea9400 EFLAGS: 00000292 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00000000f5ea9460 RCX: 0000000020000040
RDX: 0000000020000340 RSI: 0000000000000000 RDI: 00000000f5ea94a0
RBP: 00000000f5ea9460 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire+0xe3e/0x3b30 kernel/locking/lockdep.c:5005
Code: 11 00 00 39 05 a3 ff 1f 12 0f 82 be 05 00 00 ba 01 00 00 00 e9 e4 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 82 1f 00 00 49 81 3c 24 a0 6d e3 92 0f 84 98 f2
RSP: 0018:ffffc90003c56be0 EFLAGS: 00010007
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 001ffff11005867e RSI: ffff888020248000 RDI: 00ffff88802c33f7
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8fe2b0d7 R11: 0000000000000004 R12: 00ffff88802c33f7
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff88802c300000(0063) knlGS:00000000f5ea9b40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00005574da18aef8 CR3: 000000005c4d2000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 11 00 adc %eax,(%rax)
2: 00 39 add %bh,(%rcx)
4: 05 a3 ff 1f 12 add $0x121fffa3,%eax
9: 0f 82 be 05 00 00 jb 0x5cd
f: ba 01 00 00 00 mov $0x1,%edx
14: e9 e4 00 00 00 jmp 0xfd
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
23: 4c 89 e2 mov %r12,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 0f 85 82 1f 00 00 jne 0x1fb6
34: 49 81 3c 24 a0 6d e3 cmpq $0xffffffff92e36da0,(%r12)
3b: 92
3c: 0f .byte 0xf
3d: 84 .byte 0x84
3e: 98 cwtl
3f: f2 repnz
---
This report 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 syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: c760b3725e52 Merge tag 'mm-nonmm-stable-2024-05-22-17-30' ..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11ef0e44980000
kernel config: https://syzkaller.appspot.com/x/.config?x=2b8d1faad9ceb620
dashboard link: https://syzkaller.appspot.com/bug?extid=fc94f8f2007fe097c9a4
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: i386
CC: [bfo...@redhat.com kent.ov...@linux.dev linux-b...@vger.kernel.org linux-...@vger.kernel.org]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-c760b372.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/0237367631af/vmlinux-c760b372.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a9a84e3f8512/bzImage-c760b372.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+fc94f8...@syzkaller.appspotmail.com
bcachefs (loop0): alloc_read... done
bcachefs (loop0): stripes_read... done
bcachefs (loop0): snapshots_read... done
bcachefs (loop0): going read-write
bcachefs (loop0): journal_replay...
Oops: general protection fault, probably for non-canonical address 0xe01ffbf11005867e: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: maybe wild-memory-access in range [0x00ffff88802c33f0-0x00ffff88802c33f7]
CPU: 3 PID: 6039 Comm: syz-executor.0 Not tainted 6.9.0-syzkaller-11952-gc760b3725e52 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__lock_acquire+0xe3e/0x3b30 kernel/locking/lockdep.c:5005
Code: 11 00 00 39 05 a3 ff 1f 12 0f 82 be 05 00 00 ba 01 00 00 00 e9 e4 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 82 1f 00 00 49 81 3c 24 a0 6d e3 92 0f 84 98 f2
RSP: 0018:ffffc90003c56be0 EFLAGS: 00010007
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 001ffff11005867e RSI: ffff888020248000 RDI: 00ffff88802c33f7
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8fe2b0d7 R11: 0000000000000004 R12: 00ffff88802c33f7
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff88802c300000(0063) knlGS:00000000f5ea9b40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00005574da18aef8 CR3: 000000005c4d2000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
__queue_work+0x39e/0x1020 kernel/workqueue.c:2319
queue_work_on+0x11a/0x140 kernel/workqueue.c:2410
queue_work include/linux/workqueue.h:621 [inline]
__bch2_btree_node_write+0x1ec6/0x2ca0 fs/bcachefs/btree_io.c:2227
bch2_btree_node_write+0xaa/0x2f0 fs/bcachefs/btree_io.c:2302
btree_node_write_if_need fs/bcachefs/btree_io.h:151 [inline]
__btree_node_flush+0x2fb/0x3c0 fs/bcachefs/btree_trans_commit.c:250
journal_flush_pins.constprop.0+0x4b6/0xa50 fs/bcachefs/journal_reclaim.c:553
journal_flush_done+0x253/0x2c0 fs/bcachefs/journal_reclaim.c:809
bch2_journal_flush_pins+0x131/0x240 fs/bcachefs/journal_reclaim.c:839
bch2_journal_flush_all_pins fs/bcachefs/journal_reclaim.h:76 [inline]
bch2_journal_replay+0x1094/0x1390 fs/bcachefs/recovery.c:301
bch2_run_recovery_pass+0x8e/0x1a0 fs/bcachefs/recovery_passes.c:182
bch2_run_recovery_passes+0x33b/0x710 fs/bcachefs/recovery_passes.c:225
bch2_fs_recovery+0x259f/0x3b60 fs/bcachefs/recovery.c:804
bch2_fs_start+0x2e9/0x600 fs/bcachefs/super.c:1031
bch2_fs_open+0xde0/0x10f0 fs/bcachefs/super.c:2123
bch2_mount+0xd41/0x1090 fs/bcachefs/fs.c:1917
legacy_get_tree+0x109/0x220 fs/fs_context.c:662
vfs_get_tree+0x8f/0x380 fs/super.c:1780
do_new_mount fs/namespace.c:3352 [inline]
path_mount+0x6e1/0x1f10 fs/namespace.c:3679
do_mount fs/namespace.c:3692 [inline]
__do_sys_mount fs/namespace.c:3898 [inline]
__se_sys_mount fs/namespace.c:3875 [inline]
__ia32_sys_mount+0x295/0x320 fs/namespace.c:3875
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf72b7579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f5ea9400 EFLAGS: 00000292 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00000000f5ea9460 RCX: 0000000020000040
RDX: 0000000020000340 RSI: 0000000000000000 RDI: 00000000f5ea94a0
RBP: 00000000f5ea9460 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire+0xe3e/0x3b30 kernel/locking/lockdep.c:5005
Code: 11 00 00 39 05 a3 ff 1f 12 0f 82 be 05 00 00 ba 01 00 00 00 e9 e4 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 82 1f 00 00 49 81 3c 24 a0 6d e3 92 0f 84 98 f2
RSP: 0018:ffffc90003c56be0 EFLAGS: 00010007
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 001ffff11005867e RSI: ffff888020248000 RDI: 00ffff88802c33f7
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8fe2b0d7 R11: 0000000000000004 R12: 00ffff88802c33f7
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff88802c300000(0063) knlGS:00000000f5ea9b40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00005574da18aef8 CR3: 000000005c4d2000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 11 00 adc %eax,(%rax)
2: 00 39 add %bh,(%rcx)
4: 05 a3 ff 1f 12 add $0x121fffa3,%eax
9: 0f 82 be 05 00 00 jb 0x5cd
f: ba 01 00 00 00 mov $0x1,%edx
14: e9 e4 00 00 00 jmp 0xfd
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
23: 4c 89 e2 mov %r12,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 0f 85 82 1f 00 00 jne 0x1fb6
34: 49 81 3c 24 a0 6d e3 cmpq $0xffffffff92e36da0,(%r12)
3b: 92
3c: 0f .byte 0xf
3d: 84 .byte 0x84
3e: 98 cwtl
3f: f2 repnz
---
This report 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 syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
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