general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 15170 Comm: udevadm 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:ffffc90003f3fd80 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff88823bd98fc0 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff81ad243d RDI: ffffffff8db5fbd0 RBP: ffff88807fb987f0 R08: 0000000000000000 R09: ffffffff8db5fbd7 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: ffff88807f82c480 R14: 0000000000000080 R15: 0000000000000000 FS: 00007f54463a8840(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007efe64f9c028 CR3: 000000007e780000 CR4: 00000000003506f0 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 path_put+0x2d/0x60 fs/namei.c:557 do_readlinkat+0x1cf/0x2f0 fs/stat.c:472 __do_sys_readlink fs/stat.c:490 [inline] __se_sys_readlink fs/stat.c:487 [inline] __x64_sys_readlink+0x74/0xb0 fs/stat.c:487 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: 0033:0x7f5445f27277 Code: 73 01 c3 48 8b 0d 01 dc 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 59 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d d1 db 0c 00 f7 d8 64 89 01 48 RSP: 002b:00007ffe1bdb4428 EFLAGS: 00000202 ORIG_RAX: 0000000000000059 RAX: ffffffffffffffda RBX: 000055e6ca8811e0 RCX: 00007f5445f27277 RDX: 0000000000000400 RSI: 00007ffe1bdb4838 RDI: 00007ffe1bdb4438 RBP: 00007ffe1bdb4c78 R08: 000055e6ca804837 R09: 0000000000000000 R10: 000055e6ca8780c0 R11: 0000000000000202 R12: 0000000000000200 R13: 00007ffe1bdb4838 R14: 00007ffe1bdb4438 R15: 000055e6ca877ba0 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:ffffc90003f3fd80 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff88823bd98fc0 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff81ad243d RDI: ffffffff8db5fbd0 RBP: ffff88807fb987f0 R08: 0000000000000000 R09: ffffffff8db5fbd7 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: ffff88807f82c480 R14: 0000000000000080 R15: 0000000000000000 FS: 00007f54463a8840(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007efe64f9c028 CR3: 000000007e780000 CR4: 00000000003506f0 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