loop1: detected capacity change from 0 to 512 ------------[ cut here ]------------ EA inode 11 i_nlink=2 WARNING: fs/ext4/xattr.c:1057 at ext4_xattr_inode_update_ref+0x477/0x590 fs/ext4/xattr.c:1057, CPU#0: syz.1.6514/27212 Modules linked in: CPU: 0 UID: 0 PID: 27212 Comm: syz.1.6514 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 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 59 77 e2 0d 48 8b 73 40 44 89 e2 <67> 48 0f b9 3a eb a6 e8 e6 a8 2a ff 48 8d 7b 40 48 b8 00 00 00 00 RSP: 0018:ffffc900038cf3e0 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff88807dd80298 RCX: ffffc9000ca7d000 RDX: 0000000000000002 RSI: 000000000000000b RDI: ffffffff90bec6c0 RBP: ffffc900038cf4a8 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000002 R13: 1ffff92000719e7f R14: 00000000ffffffff R15: 0000000000000000 FS: 00007f8e2a5426c0(0000) GS:ffff8881245ba000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f529be37000 CR3: 000000003c562000 CR4: 0000000000350ef0 Call Trace: ext4_xattr_inode_dec_ref fs/ext4/xattr.c:1082 [inline] ext4_xattr_inode_dec_ref_all+0x526/0xed0 fs/ext4/xattr.c:1228 ext4_xattr_delete_inode+0x4ef/0xbb0 fs/ext4/xattr.c:2952 ext4_evict_inode+0x89b/0x1760 fs/ext4/inode.c:270 evict+0x3c2/0xad0 fs/inode.c:837 iput_final fs/inode.c:1957 [inline] iput.part.0+0x605/0xf50 fs/inode.c:2006 iput+0x35/0x40 fs/inode.c:1972 ext4_orphan_cleanup+0x71e/0x11e0 fs/ext4/orphan.c:472 __ext4_fill_super fs/ext4/super.c:5663 [inline] ext4_fill_super+0x90b2/0xb400 fs/ext4/super.c:5782 get_tree_bdev_flags+0x38c/0x620 fs/super.c:1694 vfs_get_tree+0x92/0x320 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline] do_new_mount_fc fs/namespace.c:3760 [inline] do_new_mount fs/namespace.c:3836 [inline] path_mount+0x7d0/0x23d0 fs/namespace.c:4146 do_mount fs/namespace.c:4159 [inline] __do_sys_mount fs/namespace.c:4348 [inline] __se_sys_mount fs/namespace.c:4325 [inline] __x64_sys_mount+0x293/0x310 fs/namespace.c:4325 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8e2959d20a 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:00007f8e2a541e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f8e2a541ee0 RCX: 00007f8e2959d20a RDX: 00002000000009c0 RSI: 0000200000000540 RDI: 00007f8e2a541ea0 RBP: 00002000000009c0 R08: 00007f8e2a541ee0 R09: 0000000000800718 R10: 0000000000800718 R11: 0000000000000246 R12: 0000200000000540 R13: 00007f8e2a541ea0 R14: 000000000000048d R15: 0000200000000200 ---------------- 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 59 77 e2 0d lea 0xde27759(%rip),%rdi # 0xde2777c 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 e6 a8 2a ff call 0xff2aa91c 36: 48 8d 7b 40 lea 0x40(%rbx),%rdi 3a: 48 rex.W 3b: b8 00 00 00 00 mov $0x0,%eax