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: 7660 Comm: udevd Tainted: G W 5.17.0-syzkaller-11406-gf82da161ea75 #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 d3 a7 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:ffffc900098d7858 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff88823bcfa0f8 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff81ad243d RDI: ffffffff8db5fbd0 RBP: ffff8880263987f0 R08: 0000000000000000 R09: ffffffff8db5fbd7 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: ffff88802623ee80 R14: 0000000000000080 R15: 0000000000000000 FS: 00007f0522cfb840(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d733000 CR3: 0000000047ebd000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 00000000e08e0077 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 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 handle_mounts fs/namei.c:1552 [inline] step_into+0xcb3/0x1d80 fs/namei.c:1850 walk_component+0x171/0x6a0 fs/namei.c:2026 lookup_last fs/namei.c:2475 [inline] path_lookupat+0x1bb/0x860 fs/namei.c:2499 filename_lookup+0x1c6/0x590 fs/namei.c:2528 vfs_statx+0x148/0x390 fs/stat.c:228 vfs_fstatat+0x8c/0xb0 fs/stat.c:255 __do_sys_newfstatat+0x91/0x110 fs/stat.c:426 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f05229251da Code: 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 0b 00 00 00 66 2e 0f 1f 84 00 00 00 00 00 90 41 89 ca b8 06 01 00 00 0f 05 <3d> 00 f0 ff ff 77 07 31 c0 c3 0f 1f 40 00 48 8b 15 69 fc 0c 00 f7 RSP: 002b:00007fffca0f7818 EFLAGS: 00000202 ORIG_RAX: 0000000000000106 RAX: ffffffffffffffda RBX: 000055c6d8c8cd60 RCX: 00007f05229251da RDX: 00007fffca0f7828 RSI: 00007fffca0f78b8 RDI: 00000000ffffff9c RBP: 000055c6d8c8df7f R08: 000055c6d8c8df7f R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000202 R12: 0000000000000000 R13: 000055c6d8c8ce50 R14: 00007fffca0f78b8 R15: 000055c6d7e88160 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 d3 a7 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:ffffc900098d7858 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff88823bcfa0f8 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff81ad243d RDI: ffffffff8db5fbd0 RBP: ffff8880263987f0 R08: 0000000000000000 R09: ffffffff8db5fbd7 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: ffff88802623ee80 R14: 0000000000000080 R15: 0000000000000000 FS: 00007f0522cfb840(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d733000 CR3: 0000000047ebd000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 00000000e08e0077 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 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 d3 a7 ca ff callq 0xffcaa7e3 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