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: 12157 Comm: syz-executor.3 Tainted: G W 6.1.68-syzkaller-00095-g8790a94475c9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 RIP: 0010:traverse_mounts fs/namei.c:1428 [inline] RIP: 0010:handle_mounts fs/namei.c:1540 [inline] RIP: 0010:step_into+0x1c4/0x1090 fs/namei.c:1831 Code: c0 0f 85 bb 0b 00 00 44 8b 3b 43 80 3c 34 00 74 0a 48 8b 7c 24 10 e8 7b fa f2 ff 48 8b 9c 24 d8 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 a8 0b 00 00 8b 1b 89 de 81 e6 00 00 07 RSP: 0018:ffffc90000bef780 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: 0000000000040000 RDX: ffffc90005dbc000 RSI: 000000000000013e RDI: 000000000000013f RBP: ffffc90000bef8d0 R08: ffffffff81c949f9 R09: ffffed1023dd56fd R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200017df0b R13: ffffc90000befb00 R14: dffffc0000000000 R15: 0000000000000015 FS: 00007f08af9866c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f08af943fa8 CR3: 00000001252d6000 CR4: 00000000003506b0 Call Trace: walk_component fs/namei.c:1999 [inline] link_path_walk+0x72c/0xee0 fs/namei.c:2320 path_lookupat+0xa0/0x450 fs/namei.c:2473 filename_lookup+0x251/0x600 fs/namei.c:2503 vfs_statx+0x107/0x4b0 fs/stat.c:229 do_statx fs/stat.c:643 [inline] __do_sys_statx fs/stat.c:670 [inline] __se_sys_statx fs/stat.c:661 [inline] __x64_sys_statx+0x1a1/0x230 fs/stat.c:661 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f08aec7dda9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f08af9860c8 EFLAGS: 00000246 ORIG_RAX: 000000000000014c RAX: ffffffffffffffda RBX: 00007f08aedac050 RCX: 00007f08aec7dda9 RDX: 0000000000004000 RSI: 0000000020008680 RDI: 0000000000000004 RBP: 00007f08aecca47a R08: 0000000020008840 R09: 0000000000000000 R10: 0000000000000010 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f08aedac050 R15: 00007ffc5e2d4058 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:traverse_mounts fs/namei.c:1428 [inline] RIP: 0010:handle_mounts fs/namei.c:1540 [inline] RIP: 0010:step_into+0x1c4/0x1090 fs/namei.c:1831 Code: c0 0f 85 bb 0b 00 00 44 8b 3b 43 80 3c 34 00 74 0a 48 8b 7c 24 10 e8 7b fa f2 ff 48 8b 9c 24 d8 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 a8 0b 00 00 8b 1b 89 de 81 e6 00 00 07 RSP: 0018:ffffc90000bef780 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: 0000000000040000 RDX: ffffc90005dbc000 RSI: 000000000000013e RDI: 000000000000013f RBP: ffffc90000bef8d0 R08: ffffffff81c949f9 R09: ffffed1023dd56fd R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200017df0b R13: ffffc90000befb00 R14: dffffc0000000000 R15: 0000000000000015 FS: 00007f08af9866c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555720f818 CR3: 00000001252d6000 CR4: 00000000003506a0 ---------------- Code disassembly (best guess): 0: c0 0f 85 rorb $0x85,(%rdi) 3: bb 0b 00 00 44 mov $0x4400000b,%ebx 8: 8b 3b mov (%rbx),%edi a: 43 80 3c 34 00 cmpb $0x0,(%r12,%r14,1) f: 74 0a je 0x1b 11: 48 8b 7c 24 10 mov 0x10(%rsp),%rdi 16: e8 7b fa f2 ff call 0xfff2fa96 1b: 48 8b 9c 24 d8 00 00 mov 0xd8(%rsp),%rbx 22: 00 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 a8 0b 00 00 jne 0xbdf 37: 8b 1b mov (%rbx),%ebx 39: 89 de mov %ebx,%esi 3b: 81 .byte 0x81 3c: e6 00 out %al,$0x0 3e: 00 07 add %al,(%rdi)