general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] CPU: 1 PID: 367 Comm: syz-executor.0 Not tainted 6.1.99-syzkaller-1151497-g0d60f50b9da4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:traverse_mounts fs/namei.c:1430 [inline] RIP: 0010:handle_mounts fs/namei.c:1542 [inline] RIP: 0010:step_into+0x1c4/0x1090 fs/namei.c:1835 Code: c0 0f 85 bb 0b 00 00 44 8b 3b 43 80 3c 34 00 74 0a 48 8b 7c 24 10 e8 fb b4 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:ffffc90001527780 EFLAGS: 00010202 RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff88810f236540 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900015278d0 R08: ffffffff81ca1259 R09: ffffed1023cc9235 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920002a4f0b R13: ffffc90001527a00 R14: dffffc0000000000 R15: 0000000000000000 FS: 00007f147b1de6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f147b1ded58 CR3: 000000011d5ba000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: walk_component+0x234/0x410 fs/namei.c:2003 lookup_last fs/namei.c:2454 [inline] path_lookupat+0x16d/0x450 fs/namei.c:2478 filename_lookup+0x251/0x600 fs/namei.c:2507 vfs_statx+0x107/0x4b0 fs/stat.c:229 vfs_fstatat fs/stat.c:267 [inline] vfs_lstat include/linux/fs.h:3382 [inline] __do_sys_newlstat fs/stat.c:423 [inline] __se_sys_newlstat+0xda/0x7c0 fs/stat.c:417 __x64_sys_newlstat+0x5b/0x70 fs/stat.c:417 x64_sys_call+0x52/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:7 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f147b67cd29 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:00007f147b1de0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000006 RAX: ffffffffffffffda RBX: 00007f147b7ac120 RCX: 00007f147b67cd29 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000240 RBP: 00007f147b6c947a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f147b7ac120 R15: 00007ffed1dde028 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:traverse_mounts fs/namei.c:1430 [inline] RIP: 0010:handle_mounts fs/namei.c:1542 [inline] RIP: 0010:step_into+0x1c4/0x1090 fs/namei.c:1835 Code: c0 0f 85 bb 0b 00 00 44 8b 3b 43 80 3c 34 00 74 0a 48 8b 7c 24 10 e8 fb b4 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:ffffc90001527780 EFLAGS: 00010202 RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff88810f236540 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900015278d0 R08: ffffffff81ca1259 R09: ffffed1023cc9235 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920002a4f0b R13: ffffc90001527a00 R14: dffffc0000000000 R15: 0000000000000000 FS: 00007f147b1de6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f147b1ded58 CR3: 000000011d5ba000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- 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 fb b4 f2 ff call 0xfff2b516 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)