------------[ cut here ]------------
WARNING: CPU: 1 PID: 13905 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 13905 Comm: syz.6.2525 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 3d f7 d8 ff 85 db 48 c7 c0 f2 ff ff ff 49 0f 44 c6 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 c0 f3 d8 ff <0f> 0b e9 1c ff ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c ea fe
RSP: 0018:ffffc90000dd0cf8 EFLAGS: 00010006
RAX: ffffffff819ed760 RBX: 0000000000000008 RCX: ffff8880207a9dc0
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed10040f53b9
R10: ffffed10040f53b9 R11: 1ffff110040f53b8 R12: ffff8880207ab548
R13: 00007ffffffff000 R14: ffffc90000dd0d68 R15: 0000000000000000
FS: 00007f6ac77626c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000000 CR3: 00000000677cb000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
bpf_probe_read_user_common kernel/trace/bpf_trace.c:157 [inline]
____bpf_probe_read_compat kernel/trace/bpf_trace.c:281 [inline]
bpf_probe_read_compat+0xdd/0x170 kernel/trace/bpf_trace.c:277
bpf_prog_1ccb8ba97563bf77+0x59/0x268
bpf_dispatcher_nop_func include/linux/bpf.h:888 [inline]
__bpf_prog_run include/linux/filter.h:628 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1878 [inline]
bpf_trace_run2+0x15b/0x2d0 kernel/trace/bpf_trace.c:1915
__traceiter_tlb_flush+0x69/0xb0 include/trace/events/tlb.h:38
trace_tlb_flush+0xe6/0x110 include/trace/events/tlb.h:38
flush_tlb_func+0x43f/0x510 arch/x86/mm/tlb.c:855
flush_smp_call_function_queue+0x2a9/0x760 kernel/smp.c:628
__sysvec_call_function_single+0x98/0x240 arch/x86/kernel/smp.c:248
instr_sysvec_call_function_single arch/x86/kernel/smp.c:243 [inline]
sysvec_call_function_single+0x98/0xc0 arch/x86/kernel/smp.c:243
asm_sysvec_call_function_single+0x16/0x20 arch/x86/include/asm/idtentry.h:684
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:205
Code: 84 00 00 00 00 00 53 48 89 fb e8 17 00 00 00 48 8b 3d 00 c9 f1 0b 48 89 de 5b e9 47 9e 43 00 00 00 cc cc 00 00 cc 48 8b 04 24 <65> 48 8b 0d 94 a4 8a 7e 65 8b 15 95 a4 8a 7e 81 e2 00 01 ff 00 74
RSP: 0018:ffffc9000322f8f0 EFLAGS: 00000287
RAX: ffffffff81359d3f RBX: ffff88801d117098 RCX: ffff8880207a9dc0
RDX: 0000000000000000 RSI: 0000000000000030 RDI: 0000000000000041
RBP: 0000000000000f01 R08: dffffc0000000000 R09: fffffbfff1ad323e
R10: fffffbfff1ad323e R11: 1ffffffff1ad323d R12: 0000000000000004
R13: ffff88801d117098 R14: 0000000000000010 R15: 0000000000000030
__canonical_address arch/x86/include/asm/page.h:76 [inline]
__is_canonical_address arch/x86/include/asm/page.h:81 [inline]
copy_from_kernel_nofault_allowed+0x9f/0x130 arch/x86/mm/maccess.c:36
copy_from_kernel_nofault+0x27/0x310 mm/maccess.c:32
prepend_copy fs/d_path.c:49 [inline]
prepend fs/d_path.c:75 [inline]
prepend_name fs/d_path.c:101 [inline]
__dentry_path+0x25c/0x5c0 fs/d_path.c:348
dentry_path_raw+0x80/0xc0 fs/d_path.c:369
tomoyo_get_dentry_path security/tomoyo/realpath.c:131 [inline]
tomoyo_get_local_path+0xce/0x740 security/tomoyo/realpath.c:157
tomoyo_realpath_from_path+0x2dc/0x610 security/tomoyo/realpath.c:-1
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_number_perm+0x1d5/0x5d0 security/tomoyo/file.c:723
security_file_ioctl+0x6c/0xa0 security/security.c:1555
__do_sys_ioctl fs/ioctl.c:868 [inline]
__se_sys_ioctl+0x48/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f6ac94fa7ab
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007f6ac7762050 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6ac9742038 RCX: 00007f6ac94fa7ab
RDX: 0000000000000000 RSI: 0000000000006364 RDI: 00000000000000d8
RBP: 0000000000000000 R08: 00007ffd3764dd77 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f6ac9742038 R14: 00007ffd3764dc90 R15: 00007ffd3764dd78
----------------
Code disassembly (best guess):
0: 84 00 test %al,(%rax)
2: 00 00 add %al,(%rax)
4: 00 00 add %al,(%rax)
6: 53 push %rbx
7: 48 89 fb mov %rdi,%rbx
a: e8 17 00 00 00 call 0x26
f: 48 8b 3d 00 c9 f1 0b mov 0xbf1c900(%rip),%rdi # 0xbf1c916
16: 48 89 de mov %rbx,%rsi
19: 5b pop %rbx
1a: e9 47 9e 43 00 jmp 0x439e66
1f: 00 00 add %al,(%rax)
21: cc int3
22: cc int3
23: 00 00 add %al,(%rax)
25: cc int3
26: 48 8b 04 24 mov (%rsp),%rax
* 2a: 65 48 8b 0d 94 a4 8a mov %gs:0x7e8aa494(%rip),%rcx # 0x7e8aa4c6 <-- trapping instruction
31: 7e
32: 65 8b 15 95 a4 8a 7e mov %gs:0x7e8aa495(%rip),%edx # 0x7e8aa4ce
39: 81 e2 00 01 ff 00 and $0xff0100,%edx
3f: 74 .byte 0x74