db_root: cannot open:
Oops: general protection fault, probably for non-canonical address 0xdffffc000000000a: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000050-0x0000000000000057]
CPU: 1 UID: 0 PID: 5829 Comm: syz-executor Not tainted 6.14.0-rc1-syzkaller-00020-g0de63bb7d919 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:__lock_acquire+0xe4/0x3c40 kernel/locking/lockdep.c:5091
Code: 08 84 d2 0f 85 15 14 00 00 44 8b 0d 2a 2c ca 0e 45 85 c9 0f 84 b4 0e 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 96 2c 00 00 49 8b 04 24 48 3d a0 27 79 93 0f 84
RSP: 0018:ffffc90003df6f80 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000002
RDX: 000000000000000a RSI: 1ffff920007bee02 RDI: 0000000000000050
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff905fd817 R11: 0000000000000005 R12: 0000000000000050
R13: ffff88807bee5a00 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557f7c74a8 CR3: 0000000025152000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5851
seqcount_lockdep_reader_access include/linux/seqlock.h:72 [inline]
path_init+0x14a5/0x1ab0 fs/namei.c:2556
path_openat+0x192/0x2d80 fs/namei.c:3984
do_filp_open+0x20c/0x470 fs/namei.c:4016
file_open_name+0x2a4/0x450 fs/open.c:1372
filp_open+0x4b/0x80 fs/open.c:1392
target_core_item_dbroot_store+0x10d/0x2e0 drivers/target/target_core_configfs.c:134
flush_write_buffer fs/configfs/file.c:207 [inline]
configfs_write_iter+0x2f6/0x4b0 fs/configfs/file.c:229
__kernel_write_iter+0x318/0xa90 fs/read_write.c:612
__kernel_write+0xf6/0x140 fs/read_write.c:632
do_acct_process+0xd11/0x1530 kernel/acct.c:539
acct_pin_kill+0x2d/0x100 kernel/acct.c:192
pin_kill+0x194/0x7c0 fs/fs_pin.c:44
mnt_pin_kill+0x61/0x1e0 fs/fs_pin.c:81
cleanup_mnt+0x3ac/0x450 fs/namespace.c:1406
task_work_run+0x14e/0x250 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0xad8/0x2d70 kernel/exit.c:938
do_group_exit+0xd3/0x2a0 kernel/exit.c:1087
get_signal+0x2576/0x2610 kernel/signal.c:3036
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa93658b7bc
Code: Unable to access opcode bytes at 0x7fa93658b792.
RSP: 002b:00007ffe6c1104d0 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: fffffffffffffe00 RBX: 00000000ffffffff RCX: 00007fa93658b7bc
RDX: 0000000000000030 RSI: 00007ffe6c110590 RDI: 00000000000000f9
RBP: 00007ffe6c11053c R08: 0000000000000000 R09: 0079746972756365
R10: 00007fa9367797e0 R11: 0000000000000246 R12: 0000000000000125
R13: 0000555561069590 R14: 000000000005fa6a R15: 00007ffe6c110590
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire+0xe4/0x3c40 kernel/locking/lockdep.c:5091
Code: 08 84 d2 0f 85 15 14 00 00 44 8b 0d 2a 2c ca 0e 45 85 c9 0f 84 b4 0e 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 96 2c 00 00 49 8b 04 24 48 3d a0 27 79 93 0f 84
RSP: 0018:ffffc90003df6f80 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000002
RDX: 000000000000000a RSI: 1ffff920007bee02 RDI: 0000000000000050
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff905fd817 R11: 0000000000000005 R12: 0000000000000050
R13: ffff88807bee5a00 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557f7c74a8 CR3: 0000000025152000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 08 84 d2 0f 85 15 14 or %al,0x1415850f(%rdx,%rdx,8)
7: 00 00 add %al,(%rax)
9: 44 8b 0d 2a 2c ca 0e mov 0xeca2c2a(%rip),%r9d # 0xeca2c3a
10: 45 85 c9 test %r9d,%r9d
13: 0f 84 b4 0e 00 00 je 0xecd
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 96 2c 00 00 jne 0x2cca
34: 49 8b 04 24 mov (%r12),%rax
38: 48 3d a0 27 79 93 cmp $0xffffffff937927a0,%rax
3e: 0f .byte 0xf
3f: 84 .byte 0x84