* [syzbot] [bcachefs?] general protection fault in six_lock_ip_waiter
@ 2024-11-11 9:39 syzbot
2024-11-12 23:11 ` syzbot
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: syzbot @ 2024-11-11 9:39 UTC (permalink / raw)
To: kent.overstreet, linux-bcachefs, linux-kernel, syzkaller-bugs
Hello,
syzbot found the following issue on:
HEAD commit: f1dce1f09380 Merge tag 'slab-for-6.12-rc7' of git://git.ke..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15e99e30580000
kernel config: https://syzkaller.appspot.com/x/.config?x=64aa0d9945bd5c1
dashboard link: https://syzkaller.appspot.com/bug?extid=13b85e45ca365499aad5
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-f1dce1f0.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/c2f2da35f667/vmlinux-f1dce1f0.xz
kernel image: https://storage.googleapis.com/syzbot-assets/31f60f71e8a7/bzImage-f1dce1f0.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+13b85e45ca365499aad5@syzkaller.appspotmail.com
loop0: detected capacity change from 0 to 32768
bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=metadata_checksum=none,data_checksum=none,compression=lz4,str_hash=crc64,journal_flush_disabled,norecovery,nojournal_transaction_names,allocator_stuck_timeout=32767,no_data_io
bcachefs (loop0): recovering from clean shutdown, journal seq 10
bcachefs (loop0): accounting_read... done
bcachefs (loop0): alloc_read... done
bcachefs (loop0): stripes_read... done
bcachefs (loop0): snapshots_read... done
bcachefs (loop0): going read-write
bcachefs (loop0): done starting filesystem
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 1
CPU: 0 UID: 0 PID: 5331 Comm: syz.0.0 Not tainted 6.12.0-rc6-syzkaller-00192-gf1dce1f09380 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
fail_dump lib/fault-inject.c:53 [inline]
should_fail_ex+0x3b0/0x4e0 lib/fault-inject.c:154
should_failslab+0xac/0x100 mm/failslab.c:46
slab_pre_alloc_hook mm/slub.c:4038 [inline]
slab_alloc_node mm/slub.c:4114 [inline]
kmem_cache_alloc_noprof+0x6c/0x2a0 mm/slub.c:4141
__bkey_cached_alloc+0x26/0xe0 fs/bcachefs/btree_key_cache.c:123
bkey_cached_alloc fs/bcachefs/btree_key_cache.c:149 [inline]
btree_key_cache_create fs/bcachefs/btree_key_cache.c:220 [inline]
btree_key_cache_fill+0x2043/0x2920 fs/bcachefs/btree_key_cache.c:309
bch2_btree_path_traverse_cached+0x84e/0xbe0 fs/bcachefs/btree_key_cache.c:361
bch2_btree_path_traverse_one+0x45d/0x2940 fs/bcachefs/btree_iter.c:1159
bch2_btree_path_traverse fs/bcachefs/btree_iter.h:247 [inline]
bch2_trans_update_get_key_cache+0x6c0/0x1230 fs/bcachefs/btree_update.c:494
bch2_trans_update+0x9b1/0x2550 fs/bcachefs/btree_update.c:539
bch2_inode_write fs/bcachefs/inode.h:139 [inline]
bch2_create_trans+0xdfb/0x1af0 fs/bcachefs/fs-common.c:179
__bch2_create+0x7ae/0xf60 fs/bcachefs/fs.c:522
bch2_mknod fs/bcachefs/fs.c:673 [inline]
bch2_create+0xea/0x1b0 fs/bcachefs/fs.c:687
lookup_open fs/namei.c:3595 [inline]
open_last_lookups fs/namei.c:3694 [inline]
path_openat+0x1c03/0x3590 fs/namei.c:3930
do_filp_open+0x235/0x490 fs/namei.c:3960
do_sys_openat2+0x13e/0x1d0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x225/0x270 fs/open.c:1434
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f061377e719
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f061457d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f0613935f80 RCX: 00007f061377e719
RDX: 0000000000000000 RSI: 000000000014927e RDI: 0000000020000180
RBP: 00007f061457d090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000000 R14: 00007f0613935f80 R15: 00007ffdaceeed98
</TASK>
Oops: general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077]
CPU: 0 UID: 0 PID: 5331 Comm: syz.0.0 Not tainted 6.12.0-rc6-syzkaller-00192-gf1dce1f09380 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__lock_acquire+0x69/0x2050 kernel/locking/lockdep.c:5065
Code: b6 04 30 84 c0 0f 85 9b 16 00 00 45 31 f6 83 3d e8 ed ac 0e 00 0f 84 b6 13 00 00 89 54 24 54 89 5c 24 68 4c 89 f8 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 ff e8 a9 51 8e 00 48 be 00 00 00 00 00 fc
RSP: 0018:ffffc9000d9a60d0 EFLAGS: 00010002
RAX: 000000000000000e RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000070
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff203a146 R12: ffff888000adc880
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000070
FS: 00007f061457d6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f9c4079148 CR3: 0000000042e60000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
six_lock_ip_waiter+0x9e/0x160 fs/bcachefs/six.c:553
six_lock_ip fs/bcachefs/six.h:253 [inline]
six_lock_ip_intent fs/bcachefs/six.h:366 [inline]
six_lock_intent fs/bcachefs/six.h:366 [inline]
bkey_cached_alloc fs/bcachefs/btree_key_cache.c:169 [inline]
btree_key_cache_create fs/bcachefs/btree_key_cache.c:220 [inline]
btree_key_cache_fill+0x59a/0x2920 fs/bcachefs/btree_key_cache.c:309
bch2_btree_path_traverse_cached+0x84e/0xbe0 fs/bcachefs/btree_key_cache.c:361
bch2_btree_path_traverse_one+0x45d/0x2940 fs/bcachefs/btree_iter.c:1159
bch2_btree_path_traverse fs/bcachefs/btree_iter.h:247 [inline]
bch2_trans_update_get_key_cache+0x6c0/0x1230 fs/bcachefs/btree_update.c:494
bch2_trans_update+0x9b1/0x2550 fs/bcachefs/btree_update.c:539
bch2_inode_write fs/bcachefs/inode.h:139 [inline]
bch2_create_trans+0xdfb/0x1af0 fs/bcachefs/fs-common.c:179
__bch2_create+0x7ae/0xf60 fs/bcachefs/fs.c:522
bch2_mknod fs/bcachefs/fs.c:673 [inline]
bch2_create+0xea/0x1b0 fs/bcachefs/fs.c:687
lookup_open fs/namei.c:3595 [inline]
open_last_lookups fs/namei.c:3694 [inline]
path_openat+0x1c03/0x3590 fs/namei.c:3930
do_filp_open+0x235/0x490 fs/namei.c:3960
do_sys_openat2+0x13e/0x1d0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x225/0x270 fs/open.c:1434
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f061377e719
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f061457d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f0613935f80 RCX: 00007f061377e719
RDX: 0000000000000000 RSI: 000000000014927e RDI: 0000000020000180
RBP: 00007f061457d090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000000 R14: 00007f0613935f80 R15: 00007ffdaceeed98
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire+0x69/0x2050 kernel/locking/lockdep.c:5065
Code: b6 04 30 84 c0 0f 85 9b 16 00 00 45 31 f6 83 3d e8 ed ac 0e 00 0f 84 b6 13 00 00 89 54 24 54 89 5c 24 68 4c 89 f8 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 ff e8 a9 51 8e 00 48 be 00 00 00 00 00 fc
RSP: 0018:ffffc9000d9a60d0 EFLAGS: 00010002
RAX: 000000000000000e RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000070
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff203a146 R12: ffff888000adc880
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000070
FS: 00007f061457d6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f9c4079148 CR3: 0000000042e60000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: b6 04 mov $0x4,%dh
2: 30 84 c0 0f 85 9b 16 xor %al,0x169b850f(%rax,%rax,8)
9: 00 00 add %al,(%rax)
b: 45 31 f6 xor %r14d,%r14d
e: 83 3d e8 ed ac 0e 00 cmpl $0x0,0xeacede8(%rip) # 0xeacedfd
15: 0f 84 b6 13 00 00 je 0x13d1
1b: 89 54 24 54 mov %edx,0x54(%rsp)
1f: 89 5c 24 68 mov %ebx,0x68(%rsp)
23: 4c 89 f8 mov %r15,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 80 3c 30 00 cmpb $0x0,(%rax,%rsi,1) <-- trapping instruction
2e: 74 12 je 0x42
30: 4c 89 ff mov %r15,%rdi
33: e8 a9 51 8e 00 call 0x8e51e1
38: 48 rex.W
39: be 00 00 00 00 mov $0x0,%esi
3e: 00 fc add %bh,%ah
---
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 syzkaller@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
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [syzbot] [bcachefs?] general protection fault in six_lock_ip_waiter
2024-11-11 9:39 [syzbot] [bcachefs?] general protection fault in six_lock_ip_waiter syzbot
@ 2024-11-12 23:11 ` syzbot
2024-12-08 9:42 ` syzbot
2024-12-15 2:08 ` syzbot
2 siblings, 0 replies; 4+ messages in thread
From: syzbot @ 2024-11-12 23:11 UTC (permalink / raw)
To: kent.overstreet, linux-bcachefs, linux-kernel, syzkaller-bugs
syzbot has found a reproducer for the following issue on:
HEAD commit: 3022e9d00ebe Merge tag 'sched_ext-for-6.12-rc7-fixes' of g..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11b2a4c0580000
kernel config: https://syzkaller.appspot.com/x/.config?x=d2aeec8c0b2e420c
dashboard link: https://syzkaller.appspot.com/bug?extid=13b85e45ca365499aad5
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15b2a4c0580000
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-3022e9d0.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/4c8c676ae511/vmlinux-3022e9d0.xz
kernel image: https://storage.googleapis.com/syzbot-assets/9434a43ad72f/bzImage-3022e9d0.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/8c323cc169b7/mount_12.gz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+13b85e45ca365499aad5@syzkaller.appspotmail.com
RBP: 00007f85c3d27090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000000 R14: 00007f85c3135f80 R15: 00007fffe91d3d88
</TASK>
Oops: general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077]
CPU: 0 UID: 0 PID: 5577 Comm: syz.0.15 Not tainted 6.12.0-rc7-syzkaller-00012-g3022e9d00ebe #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__lock_acquire+0x69/0x2050 kernel/locking/lockdep.c:5065
Code: b6 04 30 84 c0 0f 85 9b 16 00 00 45 31 f6 83 3d f8 ed ac 0e 00 0f 84 b6 13 00 00 89 54 24 54 89 5c 24 68 4c 89 f8 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 ff e8 19 56 8e 00 48 be 00 00 00 00 00 fc
RSP: 0018:ffffc9000cb6e0d0 EFLAGS: 00010002
RAX: 000000000000000e RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000070
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff203a13e R12: ffff88801f93a440
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000070
FS: 00007f85c3d276c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd2b4000000 CR3: 000000005671c000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
six_lock_ip_waiter+0x9e/0x160 fs/bcachefs/six.c:553
six_lock_ip fs/bcachefs/six.h:253 [inline]
six_lock_ip_intent fs/bcachefs/six.h:366 [inline]
six_lock_intent fs/bcachefs/six.h:366 [inline]
bkey_cached_alloc fs/bcachefs/btree_key_cache.c:169 [inline]
btree_key_cache_create fs/bcachefs/btree_key_cache.c:220 [inline]
btree_key_cache_fill+0x59a/0x2920 fs/bcachefs/btree_key_cache.c:309
bch2_btree_path_traverse_cached+0x84e/0xbe0 fs/bcachefs/btree_key_cache.c:361
bch2_btree_path_traverse_one+0x45d/0x2940 fs/bcachefs/btree_iter.c:1159
bch2_btree_path_traverse fs/bcachefs/btree_iter.h:247 [inline]
bch2_trans_update_get_key_cache+0x6c0/0x1230 fs/bcachefs/btree_update.c:494
bch2_trans_update+0x9b1/0x2550 fs/bcachefs/btree_update.c:539
bch2_inode_write fs/bcachefs/inode.h:139 [inline]
bch2_create_trans+0xdfb/0x1af0 fs/bcachefs/fs-common.c:179
__bch2_create+0x7ae/0xf60 fs/bcachefs/fs.c:522
bch2_mknod fs/bcachefs/fs.c:673 [inline]
bch2_create+0xea/0x1b0 fs/bcachefs/fs.c:687
lookup_open fs/namei.c:3595 [inline]
open_last_lookups fs/namei.c:3694 [inline]
path_openat+0x1c03/0x3590 fs/namei.c:3930
do_filp_open+0x235/0x490 fs/namei.c:3960
do_sys_openat2+0x13e/0x1d0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x225/0x270 fs/open.c:1434
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f85c2f7e719
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f85c3d27038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f85c3135f80 RCX: 00007f85c2f7e719
RDX: 00000000000000a0 RSI: 000000000014927e RDI: 0000000020000180
RBP: 00007f85c3d27090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000000 R14: 00007f85c3135f80 R15: 00007fffe91d3d88
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire+0x69/0x2050 kernel/locking/lockdep.c:5065
Code: b6 04 30 84 c0 0f 85 9b 16 00 00 45 31 f6 83 3d f8 ed ac 0e 00 0f 84 b6 13 00 00 89 54 24 54 89 5c 24 68 4c 89 f8 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 ff e8 19 56 8e 00 48 be 00 00 00 00 00 fc
RSP: 0018:ffffc9000cb6e0d0 EFLAGS: 00010002
RAX: 000000000000000e RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000070
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff203a13e R12: ffff88801f93a440
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000070
FS: 00007f85c3d276c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd2b4000000 CR3: 000000005671c000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: b6 04 mov $0x4,%dh
2: 30 84 c0 0f 85 9b 16 xor %al,0x169b850f(%rax,%rax,8)
9: 00 00 add %al,(%rax)
b: 45 31 f6 xor %r14d,%r14d
e: 83 3d f8 ed ac 0e 00 cmpl $0x0,0xeacedf8(%rip) # 0xeacee0d
15: 0f 84 b6 13 00 00 je 0x13d1
1b: 89 54 24 54 mov %edx,0x54(%rsp)
1f: 89 5c 24 68 mov %ebx,0x68(%rsp)
23: 4c 89 f8 mov %r15,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 80 3c 30 00 cmpb $0x0,(%rax,%rsi,1) <-- trapping instruction
2e: 74 12 je 0x42
30: 4c 89 ff mov %r15,%rdi
33: e8 19 56 8e 00 call 0x8e5651
38: 48 rex.W
39: be 00 00 00 00 mov $0x0,%esi
3e: 00 fc add %bh,%ah
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [syzbot] [bcachefs?] general protection fault in six_lock_ip_waiter
2024-11-11 9:39 [syzbot] [bcachefs?] general protection fault in six_lock_ip_waiter syzbot
2024-11-12 23:11 ` syzbot
@ 2024-12-08 9:42 ` syzbot
2024-12-15 2:08 ` syzbot
2 siblings, 0 replies; 4+ messages in thread
From: syzbot @ 2024-12-08 9:42 UTC (permalink / raw)
To: kent.overstreet, linux-bcachefs, linux-kernel, syzkaller-bugs
syzbot has found a reproducer for the following issue on:
HEAD commit: 7503345ac5f5 Merge tag 'block-6.13-20241207' of git://git...
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15b00c0f980000
kernel config: https://syzkaller.appspot.com/x/.config?x=1362a5aee630ff34
dashboard link: https://syzkaller.appspot.com/bug?extid=13b85e45ca365499aad5
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10a8c820580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=114008f8580000
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-7503345a.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/e95a2b302e11/vmlinux-7503345a.xz
kernel image: https://storage.googleapis.com/syzbot-assets/e78c0c786fb3/bzImage-7503345a.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/38589268f3dc/mount_0.gz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+13b85e45ca365499aad5@syzkaller.appspotmail.com
bcachefs (loop0): bch2_get_scanned_nodes(): recovering subvolumes l=0 POS_MIN - SPOS_MAX
bcachefs (loop0): bch2_get_scanned_nodes(): recovering u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c0bef60d07000640 written 8 min_key POS_MIN durability: 1 ptr: 0:35:0 gen 0
Oops: general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077]
CPU: 0 UID: 0 PID: 5305 Comm: syz-executor212 Not tainted 6.13.0-rc1-syzkaller-00337-g7503345ac5f5 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__lock_acquire+0x6a/0x2100 kernel/locking/lockdep.c:5089
Code: b6 04 30 84 c0 0f 85 f8 16 00 00 45 31 f6 83 3d 7b cd 9e 0e 00 0f 84 c8 13 00 00 89 54 24 60 89 5c 24 38 4c 89 f8 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 ff e8 a8 ac 8f 00 48 be 00 00 00 00 00 fc
RSP: 0018:ffffc9000d0cef50 EFLAGS: 00010002
RAX: 000000000000000e RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000070
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff20329a7 R12: ffff888000b8c880
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000070
FS: 000055557a2a8380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd8e5afde0 CR3: 0000000041100000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
six_lock_ip_waiter+0x9e/0x160 fs/bcachefs/six.c:553
__btree_node_lock_nopath fs/bcachefs/btree_locking.h:225 [inline]
btree_node_lock_nopath_nofail fs/bcachefs/btree_locking.h:248 [inline]
bch2_check_topology+0x619/0xb20 fs/bcachefs/btree_gc.c:549
bch2_run_recovery_pass+0xf0/0x1e0 fs/bcachefs/recovery_passes.c:191
bch2_run_recovery_passes+0x3a7/0x880 fs/bcachefs/recovery_passes.c:244
bch2_fs_recovery+0x25cc/0x39d0 fs/bcachefs/recovery.c:861
bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1037
bch2_fs_get_tree+0xd68/0x1710 fs/bcachefs/fs.c:2170
vfs_get_tree+0x90/0x2b0 fs/super.c:1814
do_new_mount+0x2be/0xb40 fs/namespace.c:3507
do_mount fs/namespace.c:3847 [inline]
__do_sys_mount fs/namespace.c:4057 [inline]
__se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff165df18fa
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffeea454f58 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffeea454f70 RCX: 00007ff165df18fa
RDX: 00000000200000c0 RSI: 0000000020000180 RDI: 00007ffeea454f70
RBP: 0000000000000010 R08: 00007ffeea454fb0 R09: 0000000000005953
R10: 0000000000000010 R11: 0000000000000282 R12: 0000000000000004
R13: 00007ffeea454fb0 R14: 0000000000000003 R15: 0000000001000000
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire+0x6a/0x2100 kernel/locking/lockdep.c:5089
Code: b6 04 30 84 c0 0f 85 f8 16 00 00 45 31 f6 83 3d 7b cd 9e 0e 00 0f 84 c8 13 00 00 89 54 24 60 89 5c 24 38 4c 89 f8 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 ff e8 a8 ac 8f 00 48 be 00 00 00 00 00 fc
RSP: 0018:ffffc9000d0cef50 EFLAGS: 00010002
RAX: 000000000000000e RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000070
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff20329a7 R12: ffff888000b8c880
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000070
FS: 000055557a2a8380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd8e5afde0 CR3: 0000000041100000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: b6 04 mov $0x4,%dh
2: 30 84 c0 0f 85 f8 16 xor %al,0x16f8850f(%rax,%rax,8)
9: 00 00 add %al,(%rax)
b: 45 31 f6 xor %r14d,%r14d
e: 83 3d 7b cd 9e 0e 00 cmpl $0x0,0xe9ecd7b(%rip) # 0xe9ecd90
15: 0f 84 c8 13 00 00 je 0x13e3
1b: 89 54 24 60 mov %edx,0x60(%rsp)
1f: 89 5c 24 38 mov %ebx,0x38(%rsp)
23: 4c 89 f8 mov %r15,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 80 3c 30 00 cmpb $0x0,(%rax,%rsi,1) <-- trapping instruction
2e: 74 12 je 0x42
30: 4c 89 ff mov %r15,%rdi
33: e8 a8 ac 8f 00 call 0x8face0
38: 48 rex.W
39: be 00 00 00 00 mov $0x0,%esi
3e: 00 fc add %bh,%ah
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [syzbot] [bcachefs?] general protection fault in six_lock_ip_waiter
2024-11-11 9:39 [syzbot] [bcachefs?] general protection fault in six_lock_ip_waiter syzbot
2024-11-12 23:11 ` syzbot
2024-12-08 9:42 ` syzbot
@ 2024-12-15 2:08 ` syzbot
2 siblings, 0 replies; 4+ messages in thread
From: syzbot @ 2024-12-15 2:08 UTC (permalink / raw)
To: bfoster, kent.overstreet, linux-bcachefs, linux-kernel,
syzkaller-bugs
syzbot has bisected this issue to:
commit 03ef80b469d5d83530ce1ce15be78a40e5300f9b
Author: Kent Overstreet <kent.overstreet@linux.dev>
Date: Sat Sep 23 22:41:51 2023 +0000
bcachefs: Ignore unknown mount options
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15d46730580000
start commit: 243f750a2df0 Merge tag 'gpio-fixes-for-v6.13-rc3' of git:/..
git tree: upstream
final oops: https://syzkaller.appspot.com/x/report.txt?x=17d46730580000
console output: https://syzkaller.appspot.com/x/log.txt?x=13d46730580000
kernel config: https://syzkaller.appspot.com/x/.config?x=c7c9f223bfe8924e
dashboard link: https://syzkaller.appspot.com/bug?extid=13b85e45ca365499aad5
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17312730580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11f4bbe8580000
Reported-by: syzbot+13b85e45ca365499aad5@syzkaller.appspotmail.com
Fixes: 03ef80b469d5 ("bcachefs: Ignore unknown mount options")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2024-12-15 2:08 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2024-11-11 9:39 [syzbot] [bcachefs?] general protection fault in six_lock_ip_waiter syzbot
2024-11-12 23:11 ` syzbot
2024-12-08 9:42 ` syzbot
2024-12-15 2:08 ` syzbot
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