squashfs: SQUASHFS error: unable to read xattr id index table general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 17653 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 RIP: 0010:cache_first_page+0x5c/0x90 fs/squashfs/page_actor.c:27 Code: 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 30 48 b8 00 00 00 00 00 fc ff df 48 8b 1b 48 89 da 48 c1 ea 03 <80> 3c 02 00 75 0c 48 8b 03 5b c3 e8 84 7b a4 ff eb bc 48 89 df e8 RSP: 0018:ffff88804e587a88 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000010 RCX: ffffc90008886000 RDX: 0000000000000002 RSI: ffffffff81f3e8b9 RDI: ffff888092a7e2b0 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000001 R13: 00000000000001f8 R14: 0000000000000001 R15: 0000000000000000 FS: 00007f2986956700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc1df616000 CR3: 0000000096db6000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: squashfs_first_page fs/squashfs/page_actor.h:70 [inline] squashfs_read_data+0xabb/0x13a0 fs/squashfs/block.c:181 squashfs_read_table+0x184/0x1f0 fs/squashfs/cache.c:445 squashfs_read_xattr_id_table+0x208/0x440 fs/squashfs/xattr_id.c:108 squashfs_fill_super+0xcc0/0x1cf0 fs/squashfs/super.c:234 mount_bdev+0x2fc/0x3b0 fs/super.c:1158 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f29883e562a Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2986955f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000000001cb RCX: 00007f29883e562a RDX: 0000000020000200 RSI: 0000000020000240 RDI: 00007f2986955fe0 RBP: 00007f2986956020 R08: 00007f2986956020 R09: 0000000000000004 R10: 0000000000000004 R11: 0000000000000202 R12: 0000000020000200 R13: 0000000020000240 R14: 00007f2986955fe0 R15: 00000000200001c0 Modules linked in: ---[ end trace 7c7f5d91563adb82 ]--- RIP: 0010:cache_first_page+0x5c/0x90 fs/squashfs/page_actor.c:27 Code: 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 30 48 b8 00 00 00 00 00 fc ff df 48 8b 1b 48 89 da 48 c1 ea 03 <80> 3c 02 00 75 0c 48 8b 03 5b c3 e8 84 7b a4 ff eb bc 48 89 df e8 squashfs: SQUASHFS error: unable to read id index table RSP: 0018:ffff88804e587a88 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000010 RCX: ffffc90008886000 RDX: 0000000000000002 RSI: ffffffff81f3e8b9 RDI: ffff888092a7e2b0 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000001 squashfs: SQUASHFS error: unable to read xattr id index table R13: 00000000000001f8 R14: 0000000000000001 R15: 0000000000000000 FS: 00007f2986956700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 squashfs: SQUASHFS error: unable to read id index table CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd3c7178000 CR3: 0000000096db6000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 9: fc ff df c: 48 c1 ea 03 shr $0x3,%rdx 10: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 14: 75 30 jne 0x46 16: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1d: fc ff df 20: 48 8b 1b mov (%rbx),%rbx 23: 48 89 da mov %rbx,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 75 0c jne 0x3c 30: 48 8b 03 mov (%rbx),%rax 33: 5b pop %rbx 34: c3 retq 35: e8 84 7b a4 ff callq 0xffa47bbe 3a: eb bc jmp 0xfffffff8 3c: 48 89 df mov %rbx,%rdi 3f: e8 .byte 0xe8