Oops: general protection fault, probably for non-canonical address 0xfbd59c0000000025: 0000 [#1] SMP KASAN PTI KASAN: maybe wild-memory-access in range [0xdead000000000128-0xdead00000000012f] CPU: 0 UID: 0 PID: 5747 Comm: syz-executor348 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:__hlist_del include/linux/list.h:1031 [inline] RIP: 0010:detach_timer+0x120/0x2d0 kernel/time/timer.c:891 Code: c1 e8 03 80 3c 28 00 74 08 4c 89 e7 e8 a9 51 80 00 4d 89 3c 24 4d 85 ff 74 46 e8 cb f9 13 00 49 83 c7 08 4c 89 f8 48 c1 e8 03 <80> 3c 28 00 74 08 4c 89 ff e8 82 51 80 00 4d 89 27 80 7c 24 04 00 RSP: 0018:ffffc9000515fae8 EFLAGS: 00010802 RAX: 1bd5a00000000025 RBX: 1ffff110170e4694 RCX: ffff888041178000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: fffffbfff1fa1890 R12: ffff8880b8625840 R13: ffff8880b87234a8 R14: 1ffff110170e4695 R15: dead00000000012a FS: 00007f61576b06c0(0000) GS:ffff8881259f2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555584f3c768 CR3: 0000000035472000 CR4: 00000000003526f0 Call Trace: detach_if_pending kernel/time/timer.c:910 [inline] __try_to_del_timer_sync kernel/time/timer.c:1462 [inline] __timer_delete_sync+0x4fb/0x600 kernel/time/timer.c:1621 mce_timer_delete_all arch/x86/kernel/cpu/mce/core.c:1817 [inline] set_ignore_ce+0x1c2/0x2a0 arch/x86/kernel/cpu/mce/core.c:2562 kernfs_fop_write_iter+0x3a5/0x540 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x61e/0xbb0 fs/read_write.c:687 ksys_write+0x156/0x270 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x17b/0x530 arch/x86/entry/syscall_64.c:85 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f61576f9159 Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 0f 1f 44 00 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 d0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f61576b01d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f61577a9b58 RCX: 00007f61576f9159 RDX: 0000000000000002 RSI: 00002000000001a0 RDI: 0000000000000003 RBP: 00007f61577a9b50 R08: 00007f61576b06c0 R09: 35203a6b63617473 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f615777b378 R13: 0000200000000700 R14: 0000200000000180 R15: 00002000000001a0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__hlist_del include/linux/list.h:1031 [inline] RIP: 0010:detach_timer+0x120/0x2d0 kernel/time/timer.c:891 Code: c1 e8 03 80 3c 28 00 74 08 4c 89 e7 e8 a9 51 80 00 4d 89 3c 24 4d 85 ff 74 46 e8 cb f9 13 00 49 83 c7 08 4c 89 f8 48 c1 e8 03 <80> 3c 28 00 74 08 4c 89 ff e8 82 51 80 00 4d 89 27 80 7c 24 04 00 RSP: 0018:ffffc9000515fae8 EFLAGS: 00010802 RAX: 1bd5a00000000025 RBX: 1ffff110170e4694 RCX: ffff888041178000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: fffffbfff1fa1890 R12: ffff8880b8625840 R13: ffff8880b87234a8 R14: 1ffff110170e4695 R15: dead00000000012a FS: 00007f61576b06c0(0000) GS:ffff8881259f2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555584f3c768 CR3: 0000000035472000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: c1 e8 03 shr $0x3,%eax 3: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) 7: 74 08 je 0x11 9: 4c 89 e7 mov %r12,%rdi c: e8 a9 51 80 00 call 0x8051ba 11: 4d 89 3c 24 mov %r15,(%r12) 15: 4d 85 ff test %r15,%r15 18: 74 46 je 0x60 1a: e8 cb f9 13 00 call 0x13f9ea 1f: 49 83 c7 08 add $0x8,%r15 23: 4c 89 f8 mov %r15,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 ff mov %r15,%rdi 33: e8 82 51 80 00 call 0x8051ba 38: 4d 89 27 mov %r12,(%r15) 3b: 80 7c 24 04 00 cmpb $0x0,0x4(%rsp)