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: 290 Comm: syz-executor337 Not tainted 5.10.216-syzkaller-00510-ga4a2b7a82ee4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 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 16 97 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:ffffc90000b675c0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff88811f4393c0 RDX: ffffc90000b67bd8 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000b676f0 R08: ffffffff81b4a74f R09: ffffed1023924255 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200016cecf R13: dffffc0000000000 R14: ffffc90000b67ba0 R15: 0000000000000011 FS: 00007f61b948c6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002000b000 CR3: 000000011f2ba000 CR4: 00000000003506a0 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:3505 do_filp_open+0x21c/0x460 fs/namei.c:3536 do_sys_openat2+0x13f/0x6f0 fs/open.c:1217 do_sys_open fs/open.c:1233 [inline] __do_sys_open fs/open.c:1241 [inline] __se_sys_open fs/open.c:1237 [inline] __x64_sys_open+0x221/0x270 fs/open.c:1237 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f61b94ee799 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 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:00007f61b948c218 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f61b957e3d8 RCX: 00007f61b94ee799 RDX: 0000000000000002 RSI: 000000000004c07f RDI: 0000000020000300 RBP: 00007f61b957e3d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f61b954b0fc R13: 000000000000006e R14: 00007f61b95470f0 R15: 00007f61b95490f8 Modules linked in: ---[ end trace 0ec4af64f64d0609 ]--- 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 16 97 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:ffffc90000b675c0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff88811f4393c0 RDX: ffffc90000b67bd8 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000b676f0 R08: ffffffff81b4a74f R09: ffffed1023924255 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200016cecf R13: dffffc0000000000 R14: ffffc90000b67ba0 R15: 0000000000000011 FS: 00007f61b948c6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002000b000 CR3: 000000011f2ba000 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 16 97 f3 ff call 0xfff39731 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)