general protection fault, probably for non-canonical address 0xdffffc00000000b2: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000590-0x0000000000000597] CPU: 0 PID: 15626 Comm: syz-executor.0 Not tainted 5.14.0-rc6-next-20210819-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:ffffc90000007c98 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000100 RDX: 00000000000000b2 RSI: ffffffff83d3ea3d RDI: 0000000000000590 RBP: ffff88801b638c00 R08: 0000000000000003 R09: ffff88801b638d83 R10: ffffffff83d3ea32 R11: 0000000000000000 R12: 0000000000000003 R13: 0000000000000000 R14: ffff88801ba70f80 R15: ffff88801b638cd0 FS: 00007f6ecf230700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2cc26000 CR3: 000000007c8d2000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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_switch+0x59/0xf0 kernel/kcov.c:320 Code: 85 83 00 00 00 bb 03 00 00 00 4d 8b 10 31 c9 65 4c 8b 24 25 40 f0 01 00 4d 85 d2 74 6b 4c 89 e6 bf 03 00 00 00 4c 8b 4c 24 20 <49> 8b 6c c8 10 e8 2d ff ff ff 84 c0 74 47 49 8b 84 24 20 15 00 00 RSP: 0018:ffffc9000529f340 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000003 RDX: 0000000000000000 RSI: ffff888077fe3900 RDI: 0000000000000003 RBP: 0000000000000002 R08: ffffffff89dd1020 R09: ffffffff83a0b3bc R10: 0000000000000007 R11: 0000000000000000 R12: ffff888077fe3900 R13: 0000000000000265 R14: dffffc0000000000 R15: 0000000000000000 tomoyo_domain_quota_is_ok+0x1cc/0x560 security/tomoyo/util.c:1066 tomoyo_supervisor+0x2ec/0xeb0 security/tomoyo/common.c:2089 tomoyo_audit_path_number_log security/tomoyo/file.c:235 [inline] tomoyo_path_number_perm+0x41e/0x590 security/tomoyo/file.c:734 tomoyo_path_mknod+0x10d/0x190 security/tomoyo/tomoyo.c:239 security_path_mknod+0xf9/0x170 security/security.c:1132 may_o_create fs/namei.c:3103 [inline] lookup_open.isra.0+0x47b/0x13e0 fs/namei.c:3245 open_last_lookups fs/namei.c:3352 [inline] path_openat+0x9b1/0x28b0 fs/namei.c:3558 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_creat fs/open.c:1294 [inline] __se_sys_creat fs/open.c:1288 [inline] __x64_sys_creat+0xc9/0x120 fs/open.c:1288 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: 0033:0x4665e9 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6ecf230188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000140 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe0c84df0f R14: 00007f6ecf230300 R15: 0000000000022000 Modules linked in: ---[ end trace 22fcba7303068d4e ]--- 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:ffffc90000007c98 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000100 RDX: 00000000000000b2 RSI: ffffffff83d3ea3d RDI: 0000000000000590 RBP: ffff88801b638c00 R08: 0000000000000003 R09: ffff88801b638d83 R10: ffffffff83d3ea32 R11: 0000000000000000 R12: 0000000000000003 R13: 0000000000000000 R14: ffff88801ba70f80 R15: ffff88801b638cd0 FS: 00007f6ecf230700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2cc26000 CR3: 000000007c8d2000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- 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)