loop0: detected capacity change from 0 to 8 SQUASHFS error: Unable to read inode 0x87 Oops: general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] CPU: 1 UID: 0 PID: 5647 Comm: syz-executor337 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026 RIP: 0010:security_d_instantiate+0x2f/0x1d0 security/security.c:3781 Code: 41 57 41 56 53 48 89 f3 49 89 fe e8 bb 2c 20 fd 48 85 db 74 42 4c 8d 7b 04 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 9d 00 00 00 41 8b 2f 89 ee 81 e6 00 02 00 RSP: 0018:ffffc90003b1f758 EFLAGS: 00010203 RAX: 0000000000000004 RBX: 0000000000000020 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000020 RDI: ffff888077497d40 RBP: ffffc90003b1f9b0 R08: ffffffff91bec8bf R09: 1ffffffff237d917 R10: dffffc0000000000 R11: fffffbfff237d918 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff888077497d40 R15: 0000000000000024 FS: 0000555576a8a400(0000) GS:ffff8881234cd000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000000000c0 CR3: 0000000034bb2000 CR4: 00000000003526f0 Call Trace: d_splice_alias_ops+0x72/0x440 fs/dcache.c:3458 squashfs_lookup+0xc5e/0x14e0 fs/squashfs/namei.c:273 finish_lookup fs/namei.c:1934 [inline] lookup_open+0x816/0x16e0 fs/namei.c:4644 open_last_lookups fs/namei.c:4880 [inline] path_openat+0x7a5/0x20e0 fs/namei.c:5119 do_file_open+0x23e/0x4a0 fs/namei.c:5151 do_sys_openat2+0x115/0x200 fs/open.c:1492 do_sys_open fs/open.c:1498 [inline] __do_sys_openat fs/open.c:1838 [inline] __se_sys_openat fs/open.c:1833 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1833 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x171/0x540 arch/x86/entry/syscall_64.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x00007f101b51a909 Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 0f 1f 44 00 00 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 d8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd8afc50d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f101b51a909 RDX: 0000000000040042 RSI: 00002000000000c0 RDI: 00000000ffffff9c RBP: 0000000000000001 R08: 00000000ec776000 R09: 00000000ec776000 R10: 0000000000000001 R11: 0000000000000246 R12: 00007ffd8afc5110 R13: 0000000000000002 R14: 431bde82d7b634db R15: 00007f101b57a04b Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:security_d_instantiate+0x2f/0x1d0 security/security.c:3781 Code: 41 57 41 56 53 48 89 f3 49 89 fe e8 bb 2c 20 fd 48 85 db 74 42 4c 8d 7b 04 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 9d 00 00 00 41 8b 2f 89 ee 81 e6 00 02 00 RSP: 0018:ffffc90003b1f758 EFLAGS: 00010203 RAX: 0000000000000004 RBX: 0000000000000020 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000020 RDI: ffff888077497d40 RBP: ffffc90003b1f9b0 R08: ffffffff91bec8bf R09: 1ffffffff237d917 R10: dffffc0000000000 R11: fffffbfff237d918 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff888077497d40 R15: 0000000000000024 FS: 0000555576a8a400(0000) GS:ffff8881234cd000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000000000c0 CR3: 0000000034bb2000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 41 57 push %r15 2: 41 56 push %r14 4: 53 push %rbx 5: 48 89 f3 mov %rsi,%rbx 8: 49 89 fe mov %rdi,%r14 b: e8 bb 2c 20 fd call 0xfd202ccb 10: 48 85 db test %rbx,%rbx 13: 74 42 je 0x57 15: 4c 8d 7b 04 lea 0x4(%rbx),%r15 19: 4c 89 f8 mov %r15,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 9d 00 00 00 jne 0xd3 36: 41 8b 2f mov (%r15),%ebp 39: 89 ee mov %ebp,%esi 3b: 81 .byte 0x81 3c: e6 00 out %al,$0x0 3e: 02 00 add (%rax),%al