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: 2966 Comm: udevd Not tainted 5.17.0-syzkaller #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+0x1b6/0x4a0 mm/list_lru.c:138 Code: 0f 84 ec 01 00 00 8b 44 24 08 4d 89 e9 85 c0 0f 89 93 01 00 00 4d 8d 45 08 48 b8 00 00 00 00 00 fc ff df 4c 89 c2 48 c1 ea 03 <80> 3c 02 00 0f 85 70 02 00 00 4d 8b 7d 08 4c 89 ca 48 89 df 4c 89 RSP: 0018:ffffc90001b37940 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff88823bcee0f8 RCX: 0000000000000001 RDX: 0000000000000001 RSI: ffffffff88eba2c0 RDI: ffff888021ed8090 RBP: ffff88801c36c7f0 R08: 0000000000000008 R09: 0000000000000000 R10: fffff940011de770 R11: 0000000000000001 R12: 0000000000000001 R13: 0000000000000000 R14: ffff88807e28d680 R15: ffff888021ed8080 FS: 00007fa26194b840(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200c1038 CR3: 000000007b83e000 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+0x543/0xa00 fs/dcache.c:908 handle_mounts fs/namei.c:1552 [inline] step_into+0xca2/0x20f0 fs/namei.c:1850 open_last_lookups fs/namei.c:3423 [inline] path_openat+0x3d4/0x2390 fs/namei.c:3606 do_filp_open+0x199/0x3d0 fs/namei.c:3636 do_sys_openat2+0x11e/0x400 fs/open.c:1214 do_sys_open fs/open.c:1230 [inline] __do_sys_openat fs/open.c:1246 [inline] __se_sys_openat fs/open.c:1241 [inline] __x64_sys_openat+0x11b/0x1d0 fs/open.c:1241 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fa261aa2697 Code: 25 00 00 41 00 3d 00 00 41 00 74 37 64 8b 04 25 18 00 00 00 85 c0 75 5b 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 85 00 00 00 48 83 c4 68 5d 41 5c c3 0f 1f RSP: 002b:00007ffd66e35720 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000560344daeba0 RCX: 00007fa261aa2697 RDX: 0000000000080000 RSI: 00007ffd66e35858 RDI: 00000000ffffff9c RBP: 00007ffd66e35858 R08: 0000000000000008 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000080000 R13: 0000560344daeba0 R14: 0000000000000001 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:list_add_tail include/linux/list.h:102 [inline] RIP: 0010:list_lru_add+0x1b6/0x4a0 mm/list_lru.c:138 Code: 0f 84 ec 01 00 00 8b 44 24 08 4d 89 e9 85 c0 0f 89 93 01 00 00 4d 8d 45 08 48 b8 00 00 00 00 00 fc ff df 4c 89 c2 48 c1 ea 03 <80> 3c 02 00 0f 85 70 02 00 00 4d 8b 7d 08 4c 89 ca 48 89 df 4c 89 RSP: 0018:ffffc90001b37940 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff88823bcee0f8 RCX: 0000000000000001 RDX: 0000000000000001 RSI: ffffffff88eba2c0 RDI: ffff888021ed8090 RBP: ffff88801c36c7f0 R08: 0000000000000008 R09: 0000000000000000 R10: fffff940011de770 R11: 0000000000000001 R12: 0000000000000001 R13: 0000000000000000 R14: ffff88807e28d680 R15: ffff888021ed8080 FS: 00007fa26194b840(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200c1038 CR3: 000000007b83e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 0f 84 ec 01 00 00 je 0x1f2 6: 8b 44 24 08 mov 0x8(%rsp),%eax a: 4d 89 e9 mov %r13,%r9 d: 85 c0 test %eax,%eax f: 0f 89 93 01 00 00 jns 0x1a8 15: 4d 8d 45 08 lea 0x8(%r13),%r8 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 4c 89 c2 mov %r8,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 70 02 00 00 jne 0x2a4 34: 4d 8b 7d 08 mov 0x8(%r13),%r15 38: 4c 89 ca mov %r9,%rdx 3b: 48 89 df mov %rbx,%rdi 3e: 4c rex.WR 3f: 89 .byte 0x89