loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): orphan cleanup on readonly fs ------------[ cut here ]------------ EA inode 11 i_nlink=0 WARNING: fs/ext4/xattr.c:1057 at ext4_xattr_inode_update_ref+0x477/0x590 fs/ext4/xattr.c:1057, CPU#1: syz.0.17/5895 Modules linked in: CPU: 1 UID: 0 PID: 5895 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:ext4_xattr_inode_update_ref+0x47e/0x590 fs/ext4/xattr.c:1057 Code: 40 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 0a 01 00 00 48 8d 3d 09 17 fb 0d 48 8b 73 40 44 89 e2 <67> 48 0f b9 3a eb a6 e8 86 db 21 ff 48 8d 7b 40 48 b8 00 00 00 00 RSP: 0018:ffffc900037a7170 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff888067a4f2c0 RCX: ffffffff82e78295 RDX: 0000000000000000 RSI: 000000000000000b RDI: ffffffff90e299f0 RBP: ffffc900037a7238 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 1ffff920006f4e31 R14: 00000000ffffffff R15: 0000000000000000 FS: 0000555571677500(0000) GS:ffff8881243e7000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f09a38ae9c0 CR3: 000000006f1d1000 CR4: 0000000000350ef0 Call Trace: ext4_xattr_inode_dec_ref fs/ext4/xattr.c:1082 [inline] ext4_xattr_set_entry+0x185b/0x20b0 fs/ext4/xattr.c:1726 ext4_xattr_ibody_set+0x3d3/0x5d0 fs/ext4/xattr.c:2275 ext4_xattr_move_to_block fs/ext4/xattr.c:2678 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2746 [inline] ext4_expand_extra_isize_ea+0x180d/0x1d70 fs/ext4/xattr.c:2834 __ext4_expand_extra_isize+0x346/0x480 fs/ext4/inode.c:6486 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6529 [inline] __ext4_mark_inode_dirty+0x668/0x880 fs/ext4/inode.c:6607 ext4_evict_inode+0x835/0x1960 fs/ext4/inode.c:267 evict+0x3c2/0xad0 fs/inode.c:825 iput_final fs/inode.c:2019 [inline] iput.part.0+0x989/0x1050 fs/inode.c:2068 iput+0x35/0x40 fs/inode.c:2034 ext4_orphan_cleanup+0x71e/0x11e0 fs/ext4/orphan.c:472 __ext4_fill_super fs/ext4/super.c:5705 [inline] ext4_fill_super+0x917f/0xb470 fs/ext4/super.c:5828 get_tree_bdev_flags+0x38c/0x620 fs/super.c:1634 vfs_get_tree+0x92/0x320 fs/super.c:1694 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3765 [inline] do_new_mount fs/namespace.c:3841 [inline] path_mount+0x7d0/0x23d0 fs/namespace.c:4161 do_mount fs/namespace.c:4174 [inline] __do_sys_mount fs/namespace.c:4390 [inline] __se_sys_mount fs/namespace.c:4367 [inline] __x64_sys_mount+0x293/0x310 fs/namespace.c:4367 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6f0639e0ca Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc4c63bad8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffc4c63bb60 RCX: 00007f6f0639e0ca RDX: 0000200000000180 RSI: 0000200000000000 RDI: 00007ffc4c63bb20 RBP: 0000200000000180 R08: 00007ffc4c63bb60 R09: 000000000000001f R10: 000000000000001f R11: 0000000000000246 R12: 0000200000000000 R13: 00007ffc4c63bb20 R14: 000000000000047a R15: 00002000000001c0 ---------------- Code disassembly (best guess): 0: 40 rex 1: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 8: fc ff df b: 48 89 fa mov %rdi,%rdx e: 48 c1 ea 03 shr $0x3,%rdx 12: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 16: 0f 85 0a 01 00 00 jne 0x126 1c: 48 8d 3d 09 17 fb 0d lea 0xdfb1709(%rip),%rdi # 0xdfb172c 23: 48 8b 73 40 mov 0x40(%rbx),%rsi 27: 44 89 e2 mov %r12d,%edx * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: eb a6 jmp 0xffffffd7 31: e8 86 db 21 ff call 0xff21dbbc 36: 48 8d 7b 40 lea 0x40(%rbx),%rdi 3a: 48 rex.W 3b: b8 00 00 00 00 mov $0x0,%eax