Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 UID: 0 PID: 27185 Comm: syz.2.4308 Not tainted 6.13.0-rc5-syzkaller-00012-g0bc21e701a6f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:strlen+0x1e/0xa0 lib/string.c:413
Code: 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 48 89 fd 48 c1 ea 03 53 48 83 ec 08 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 50 80 7d 00 00
RSP: 0018:ffffc9000d6679f0 EFLAGS: 00010286
RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: ffffffff845000d4
RDX: 0000000000000000 RSI: ffffffff84500115 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000003 R12: 0000000000000000
R13: 0000000000000000 R14: 1ffff1100867ae16 R15: 0000000000000002
FS: 00007fa57d3f66c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000007000 CR3: 000000003289e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
tomoyo_flush+0xb1/0x4b0 security/tomoyo/common.c:209
tomoyo_set_string+0xaf/0xe0 security/tomoyo/common.c:255
tomoyo_print_condition security/tomoyo/common.c:1292 [inline]
tomoyo_print_entry+0xef8/0x2720 security/tomoyo/common.c:1570
tomoyo_read_domain2+0xa3/0x380 security/tomoyo/common.c:1596
tomoyo_read_domain security/tomoyo/common.c:1649 [inline]
tomoyo_read_domain+0x3d2/0x9c0 security/tomoyo/common.c:1610
tomoyo_read_control+0x281/0x510 security/tomoyo/common.c:2591
vfs_read+0x1df/0xbe0 fs/read_write.c:563
ksys_read+0x12b/0x250 fs/read_write.c:708
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa57f585d29
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:00007fa57d3f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fa57f775fa0 RCX: 00007fa57f585d29
RDX: 000000000000b4d3 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007fa57f601b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa57f775fa0 R15: 00007ffdc9ebbd58
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:strlen+0x1e/0xa0 lib/string.c:413
Code: 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 48 89 fd 48 c1 ea 03 53 48 83 ec 08 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 50 80 7d 00 00
RSP: 0018:ffffc9000d6679f0 EFLAGS: 00010286
RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: ffffffff845000d4
RDX: 0000000000000000 RSI: ffffffff84500115 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000003 R12: 0000000000000000
R13: 0000000000000000 R14: 1ffff1100867ae16 R15: 0000000000000002
FS: 00007fa57d3f66c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c824cf7 CR3: 000000003289e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 90 nop
1: 90 nop
2: 90 nop
3: 90 nop
4: 90 nop
5: 90 nop
6: 90 nop
7: 90 nop
8: 90 nop
9: 90 nop
a: 90 nop
b: 90 nop
c: f3 0f 1e fa endbr64
10: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
17: fc ff df
1a: 48 89 fa mov %rdi,%rdx
1d: 55 push %rbp
1e: 48 89 fd mov %rdi,%rbp
21: 48 c1 ea 03 shr $0x3,%rdx
25: 53 push %rbx
26: 48 83 ec 08 sub $0x8,%rsp
* 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction
2e: 48 89 fa mov %rdi,%rdx
31: 83 e2 07 and $0x7,%edx
34: 38 d0 cmp %dl,%al
36: 7f 04 jg 0x3c
38: 84 c0 test %al,%al
3a: 75 50 jne 0x8c
3c: 80 7d 00 00 cmpb $0x0,0x0(%rbp)