Oops: general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] CPU: 0 UID: 101 PID: 5498 Comm: dhcpcd Not tainted 6.13.0-rc2-syzkaller-00036-g231825b2e1ff #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 RIP: 0010:tomoyo_check_acl+0xb0/0x410 security/tomoyo/domain.c:173 Code: 00 0f 85 57 03 00 00 49 8b 5d 00 49 39 dd 0f 84 fc 01 00 00 e8 01 08 48 fd 48 8d 7b 18 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 <0f> b6 04 28 38 d0 7f 08 84 c0 0f 85 cc 02 00 00 44 0f b6 7b 18 31 RSP: 0018:ffffc90003987bf0 EFLAGS: 00010246 RAX: 0000000000000003 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff845135ef RDI: 0000000000000018 RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000001 R12: ffffc90003987cb0 R13: ffff8880331aec90 R14: 0000000000000000 R15: 0000000000000002 FS: 00007f033cef4740(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f658cdb8f98 CR3: 000000002ffb8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tomoyo_path_number_perm+0x350/0x5b0 security/tomoyo/file.c:733 security_file_ioctl+0x9b/0x240 security/security.c:2908 __do_sys_ioctl fs/ioctl.c:900 [inline] __se_sys_ioctl fs/ioctl.c:892 [inline] __x64_sys_ioctl+0xb7/0x200 fs/ioctl.c:892 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: 0033:0x7f033cfc2d49 Code: 5c c3 48 8d 44 24 08 48 89 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 b8 10 00 00 00 c7 44 24 b8 10 00 00 00 0f 05 <41> 89 c0 3d 00 f0 ff ff 76 10 48 8b 15 ae 60 0d 00 f7 d8 41 83 c8 RSP: 002b:00007ffcd46d7688 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000041 RCX: 00007f033cfc2d49 RDX: 00007ffcd46d7690 RSI: 0000000000008913 RDI: 0000000000000011 RBP: 0000556515c99aa0 R08: 0000000000000000 R09: 00007ffcd46d75cc R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcd46d7690 R14: 00007ffcd46d7728 R15: 0000556515c99aa0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:tomoyo_check_acl+0xb0/0x410 security/tomoyo/domain.c:173 Code: 00 0f 85 57 03 00 00 49 8b 5d 00 49 39 dd 0f 84 fc 01 00 00 e8 01 08 48 fd 48 8d 7b 18 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 <0f> b6 04 28 38 d0 7f 08 84 c0 0f 85 cc 02 00 00 44 0f b6 7b 18 31 RSP: 0018:ffffc90003987bf0 EFLAGS: 00010246 RAX: 0000000000000003 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff845135ef RDI: 0000000000000018 RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000001 R12: ffffc90003987cb0 R13: ffff8880331aec90 R14: 0000000000000000 R15: 0000000000000002 FS: 00007f033cef4740(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff76b148178 CR3: 000000002ffb8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 0f add %cl,(%rdi) 2: 85 57 03 test %edx,0x3(%rdi) 5: 00 00 add %al,(%rax) 7: 49 8b 5d 00 mov 0x0(%r13),%rbx b: 49 39 dd cmp %rbx,%r13 e: 0f 84 fc 01 00 00 je 0x210 14: e8 01 08 48 fd call 0xfd48081a 19: 48 8d 7b 18 lea 0x18(%rbx),%rdi 1d: 48 89 f8 mov %rdi,%rax 20: 48 89 fa mov %rdi,%rdx 23: 48 c1 e8 03 shr $0x3,%rax 27: 83 e2 07 and $0x7,%edx * 2a: 0f b6 04 28 movzbl (%rax,%rbp,1),%eax <-- trapping instruction 2e: 38 d0 cmp %dl,%al 30: 7f 08 jg 0x3a 32: 84 c0 test %al,%al 34: 0f 85 cc 02 00 00 jne 0x306 3a: 44 0f b6 7b 18 movzbl 0x18(%rbx),%r15d 3f: 31 .byte 0x31