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: 23489 Comm: syz-executor.1 Tainted: G W 5.10.209-syzkaller-00002-g4e1bc8d8e8ae #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:traverse_mounts fs/namei.c:1357 [inline] RIP: 0010:handle_mounts fs/namei.c:1477 [inline] RIP: 0010:step_into+0x1b9/0xec0 fs/namei.c:1782 Code: 24 0f 85 cf 0a 00 00 44 8b 3a 43 80 3c 2c 00 74 0a 48 8b 7c 24 18 e8 b6 99 f3 ff 48 8b 9c 24 b8 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 c1 0a 00 00 8b 1b 89 de 81 e6 00 00 07 RSP: 0018:ffffc900011df5e0 EFLAGS: 00010203 RAX: 0000000000000001 RBX: 000000000000000f RCX: 0000000000040000 RDX: ffffc900011dfbf8 RSI: 00000000000001cb RDI: 00000000000001cc RBP: ffffc900011df710 R08: ffffffff81b4894f R09: ffffed102392e135 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200023bed3 R13: dffffc0000000000 R14: ffffc900011dfbc0 R15: 0000000000000011 FS: 00007fac9854d6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fac9858efa8 CR3: 0000000113d3b000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: walk_component+0x359/0x610 fs/namei.c:1958 link_path_walk+0x5c7/0xbd0 path_openat+0x26a/0x3000 fs/namei.c:3511 do_filp_open+0x21c/0x460 fs/namei.c:3542 do_sys_openat2+0x13f/0x6f0 fs/open.c:1217 do_sys_open fs/open.c:1233 [inline] __do_sys_creat fs/open.c:1307 [inline] __se_sys_creat fs/open.c:1301 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1301 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7fac9981be69 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:00007fac9854d0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007fac9994a120 RCX: 00007fac9981be69 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200001c0 RBP: 00007fac9986847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fac9994a120 R15: 00007ffe9ecf7028 Modules linked in: ---[ end trace ba21ddb7f091b527 ]--- RIP: 0010:traverse_mounts fs/namei.c:1357 [inline] RIP: 0010:handle_mounts fs/namei.c:1477 [inline] RIP: 0010:step_into+0x1b9/0xec0 fs/namei.c:1782 Code: 24 0f 85 cf 0a 00 00 44 8b 3a 43 80 3c 2c 00 74 0a 48 8b 7c 24 18 e8 b6 99 f3 ff 48 8b 9c 24 b8 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 c1 0a 00 00 8b 1b 89 de 81 e6 00 00 07 RSP: 0018:ffffc900011df5e0 EFLAGS: 00010203 RAX: 0000000000000001 RBX: 000000000000000f RCX: 0000000000040000 RDX: ffffc900011dfbf8 RSI: 00000000000001cb RDI: 00000000000001cc RBP: ffffc900011df710 R08: ffffffff81b4894f R09: ffffed102392e135 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200023bed3 R13: dffffc0000000000 R14: ffffc900011dfbc0 R15: 0000000000000011 FS: 00007fac9854d6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020004100 CR3: 0000000113d3b000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 24 0f and $0xf,%al 2: 85 cf test %ecx,%edi 4: 0a 00 or (%rax),%al 6: 00 44 8b 3a add %al,0x3a(%rbx,%rcx,4) a: 43 80 3c 2c 00 cmpb $0x0,(%r12,%r13,1) f: 74 0a je 0x1b 11: 48 8b 7c 24 18 mov 0x18(%rsp),%rdi 16: e8 b6 99 f3 ff call 0xfff399d1 1b: 48 8b 9c 24 b8 00 00 mov 0xb8(%rsp),%rbx 22: 00 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 c1 0a 00 00 jne 0xaf8 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)