general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 1 PID: 3601 Comm: udevd Tainted: G W 5.17.0-syzkaller-10753-gbddac7c1e02b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:list_add_tail include/linux/list.h:102 [inline] RIP: 0010:list_lru_add+0x277/0x510 mm/list_lru.c:129 Code: 04 64 4d 8d 7c c7 10 4c 89 3c 24 e8 93 a2 ca ff 49 8d 47 08 48 89 c2 48 89 44 24 10 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 4d 02 00 00 4d 8b 77 08 48 89 df 48 8b 14 24 4c RSP: 0018:ffffc9000318fdb0 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff88823bd3e0f8 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff81ad98cd RDI: ffffffff8db49590 RBP: ffff88807ed0e7f0 R08: 0000000000000000 R09: ffffffff8db49597 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: ffff88807f4eaa80 R14: 0000000000000080 R15: 0000000000000000 FS: 00007f99d6095840(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020002000 CR3: 00000000169dc000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_lru_add fs/dcache.c:431 [inline] retain_dentry fs/dcache.c:685 [inline] dput+0x7a7/0xdb0 fs/dcache.c:908 __fput+0x3ab/0x9f0 fs/file_table.c:330 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:190 [inline] exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:222 __syscall_exit_to_user_mode_work kernel/entry/common.c:304 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:315 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f99d6190fc3 Code: 48 ff ff ff b8 ff ff ff ff e9 3e ff ff ff 66 0f 1f 84 00 00 00 00 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 RSP: 002b:00007ffe0725e6e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 00007f99d60956a8 RCX: 00007f99d6190fc3 RDX: 0000000000000009 RSI: 00007ffe0725e74f RDI: 0000000000000008 RBP: 00007ffe0726ee28 R08: 00000000ffffffff R09: 00007ffe0725e5d0 R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000002 R13: 0000000000000072 R14: 00007ffe0725e757 R15: 00007ffe0725e74f Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:list_add_tail include/linux/list.h:102 [inline] RIP: 0010:list_lru_add+0x277/0x510 mm/list_lru.c:129 Code: 04 64 4d 8d 7c c7 10 4c 89 3c 24 e8 93 a2 ca ff 49 8d 47 08 48 89 c2 48 89 44 24 10 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 4d 02 00 00 4d 8b 77 08 48 89 df 48 8b 14 24 4c RSP: 0018:ffffc9000318fdb0 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff88823bd3e0f8 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff81ad98cd RDI: ffffffff8db49590 RBP: ffff88807ed0e7f0 R08: 0000000000000000 R09: ffffffff8db49597 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: ffff88807f4eaa80 R14: 0000000000000080 R15: 0000000000000000 FS: 00007f99d6095840(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020002000 CR3: 00000000169dc000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 04 64 add $0x64,%al 2: 4d 8d 7c c7 10 lea 0x10(%r15,%rax,8),%r15 7: 4c 89 3c 24 mov %r15,(%rsp) b: e8 93 a2 ca ff callq 0xffcaa2a3 10: 49 8d 47 08 lea 0x8(%r15),%rax 14: 48 89 c2 mov %rax,%rdx 17: 48 89 44 24 10 mov %rax,0x10(%rsp) 1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 23: fc ff df 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 4d 02 00 00 jne 0x281 34: 4d 8b 77 08 mov 0x8(%r15),%r14 38: 48 89 df mov %rbx,%rdi 3b: 48 8b 14 24 mov (%rsp),%rdx 3f: 4c rex.WR