general protection fault, probably for non-canonical address 0xdffffc00000000b2: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000590-0x0000000000000597] CPU: 1 PID: 18759 Comm: systemd-udevd Not tainted 5.14.0-rc6-next-20210820-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:latency_exceeded block/blk-wbt.c:237 [inline] RIP: 0010:wb_timer_fn+0x149/0x1750 block/blk-wbt.c:360 Code: 03 80 3c 02 00 0f 85 79 13 00 00 48 8b 9b c8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 90 05 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 46 13 00 00 48 8b 9b 90 05 00 00 48 b8 00 00 00 RSP: 0018:ffffc90000dc0c98 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000100 RDX: 00000000000000b2 RSI: ffffffff83d4247d RDI: 0000000000000590 RBP: ffff88801b391c00 R08: 0000000000000003 R09: ffff88801b391d83 R10: ffffffff83d42472 R11: 0000000000000000 R12: 0000000000000003 R13: 0000000000000000 R14: ffff888145cf1a80 R15: ffff88801b391cd0 FS: 00007ff673c388c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000051a070 CR3: 00000000773c5000 CR4: 00000000001506e0 Call Trace: call_timer_fn+0x1ab/0x6c0 kernel/time/timer.c:1421 expire_timers kernel/time/timer.c:1466 [inline] __run_timers.part.0+0x675/0xa20 kernel/time/timer.c:1734 __run_timers kernel/time/timer.c:1715 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x133/0x190 kernel/softirq.c:636 irq_exit_rcu+0x9/0x30 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x60 kernel/kcov.c:197 Code: 81 e1 00 01 00 00 65 48 8b 14 25 40 f0 01 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82 3c 15 00 00 85 c0 74 2b 8b 82 18 15 00 00 <83> f8 02 75 20 48 8b 8a 20 15 00 00 8b 92 1c 15 00 00 48 8b 01 48 RSP: 0018:ffffc90002d57530 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000000000 RDX: ffff8880260ad580 RSI: ffffffff83a0ef04 RDI: 0000000000000003 RBP: ffff88807be46980 R08: 0000000000000000 R09: 0000000000000005 R10: ffffffff83a0ef3d R11: 0000000000000010 R12: 0000000000000020 R13: 00000000000002f9 R14: dffffc0000000000 R15: 0000000000000000 tomoyo_domain_quota_is_ok+0x2f4/0x560 security/tomoyo/util.c:1093 tomoyo_supervisor+0x2ec/0xeb0 security/tomoyo/common.c:2089 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline] tomoyo_path_permission security/tomoyo/file.c:587 [inline] tomoyo_path_permission+0x270/0x3a0 security/tomoyo/file.c:573 tomoyo_check_open_permission+0x348/0x380 security/tomoyo/file.c:777 tomoyo_file_open security/tomoyo/tomoyo.c:311 [inline] tomoyo_file_open+0xa3/0xd0 security/tomoyo/tomoyo.c:306 security_file_open+0x49/0xb0 security/security.c:1634 do_dentry_open+0x353/0x11d0 fs/open.c:813 do_open fs/namei.c:3428 [inline] path_openat+0x1cbe/0x28b0 fs/namei.c:3561 do_filp_open+0x1aa/0x400 fs/namei.c:3588 do_sys_openat2+0x16d/0x4e0 fs/open.c:1204 do_sys_open fs/open.c:1220 [inline] __do_sys_open fs/open.c:1228 [inline] __se_sys_open fs/open.c:1224 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1224 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7ff672d7e840 Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 RSP: 002b:00007fff77558f18 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000703 RCX: 00007ff672d7e840 RDX: 0000000000000003 RSI: 0000000000080000 RDI: 00007fff77558f20 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000012 R10: 0000000000000064 R11: 0000000000000246 R12: 00007fff77559f60 R13: 0000000000000000 R14: 0000000000000000 R15: 000000000000000f Modules linked in: ---[ end trace a85ff29e767fbe68 ]--- RIP: 0010:latency_exceeded block/blk-wbt.c:237 [inline] RIP: 0010:wb_timer_fn+0x149/0x1750 block/blk-wbt.c:360 Code: 03 80 3c 02 00 0f 85 79 13 00 00 48 8b 9b c8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 90 05 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 46 13 00 00 48 8b 9b 90 05 00 00 48 b8 00 00 00 RSP: 0018:ffffc90000dc0c98 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000100 RDX: 00000000000000b2 RSI: ffffffff83d4247d RDI: 0000000000000590 RBP: ffff88801b391c00 R08: 0000000000000003 R09: ffff88801b391d83 R10: ffffffff83d42472 R11: 0000000000000000 R12: 0000000000000003 R13: 0000000000000000 R14: ffff888145cf1a80 R15: ffff88801b391cd0 FS: 00007ff673c388c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000051a070 CR3: 00000000773c5000 CR4: 00000000001506e0 ---------------- Code disassembly (best guess): 0: 03 80 3c 02 00 0f add 0xf00023c(%rax),%eax 6: 85 79 13 test %edi,0x13(%rcx) 9: 00 00 add %al,(%rax) b: 48 8b 9b c8 00 00 00 mov 0xc8(%rbx),%rbx 12: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 19: fc ff df 1c: 48 8d bb 90 05 00 00 lea 0x590(%rbx),%rdi 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 46 13 00 00 jne 0x137a 34: 48 8b 9b 90 05 00 00 mov 0x590(%rbx),%rbx 3b: 48 rex.W 3c: b8 .byte 0xb8 3d: 00 00 add %al,(%rax)