syzbot

EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
EXT4-fs error (device loop0): ext4_orphan_get:1424: comm syz.0.34: bad orphan inode 15
ext4_test_bit(bit=14, block=4) = 1
is_bad_inode(inode)=0
NEXT_ORPHAN(inode)=1768390742
max_ino=32
i_nlink=0
------------[ cut here ]------------
EA inode 11 i_nlink=0
WARNING: CPU: 0 PID: 5964 at fs/ext4/xattr.c:1058 ext4_xattr_inode_update_ref+0x4fb/0x550 fs/ext4/xattr.c:1056
Modules linked in:
CPU: 0 PID: 5964 Comm: syz.0.34 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:ext4_xattr_inode_update_ref+0x4fb/0x550 fs/ext4/xattr.c:1056
Code: 8d 7e 50 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 f6 20 9a ff 49 8b 37 48 c7 c7 60 c7 be 8a 89 da e8 c5 12 0d ff <0f> 0b 4c 8b 74 24 08 4c 8b 7c 24 10 e9 b9 fe ff ff e8 0f 0c 25 08
RSP: 0018:ffffc90003447280 EFLAGS: 00010246
RAX: 909e42d7e4f6f100 RBX: 0000000000000000 RCX: ffff888028675a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffc90003447370 R08: ffff8880b8e28c13 R09: 1ffff110171c5182
R10: dffffc0000000000 R11: ffffed10171c5183 R12: dffffc0000000000
R13: ffff888071cad4a8 R14: ffff888071cad2b0 R15: ffff888071cad300
FS:  000055556e7f4500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb66a3b2000 CR3: 000000005ecdc000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 ext4_xattr_inode_dec_ref fs/ext4/xattr.c:1081 [inline]
 ext4_xattr_inode_dec_ref_all+0x9a1/0x1030 fs/ext4/xattr.c:1227
 ext4_xattr_delete_inode+0xa45/0xc00 fs/ext4/xattr.c:2948
 ext4_evict_inode+0xaa3/0xea0 fs/ext4/inode.c:269
 evict+0x486/0x870 fs/inode.c:705
 ext4_orphan_get+0x4e7/0x600 fs/ext4/ialloc.c:1439
 ext4_orphan_cleanup+0xa86/0x1400 fs/ext4/orphan.c:465
 __ext4_fill_super fs/ext4/super.c:5617 [inline]
 ext4_fill_super+0x5e29/0x66f0 fs/ext4/super.c:5740
 get_tree_bdev+0x3e4/0x510 fs/super.c:1591
 vfs_get_tree+0x8c/0x280 fs/super.c:1764
 do_new_mount+0x24b/0xa40 fs/namespace.c:3386
 do_mount fs/namespace.c:3726 [inline]
 __do_sys_mount fs/namespace.c:3935 [inline]
 __se_sys_mount+0x2da/0x3c0 fs/namespace.c:3912
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f917e990eea
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffffd2a68e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffffd2a6970 RCX: 00007f917e990eea
RDX: 0000200000000180 RSI: 0000200000000080 RDI: 00007ffffd2a6930
RBP: 0000200000000180 R08: 00007ffffd2a6970 R09: 0000000000800700
R10: 0000000000800700 R11: 0000000000000246 R12: 0000200000000080
R13: 00007ffffd2a6930 R14: 000000000000046f R15: 00002000000000c0
 </TASK>