EXT4-fs error (device loop3): ext4_map_blocks:783: inode #11: block 2: comm syz.3.24: lblock 0 mapped to illegal pblock 2 (length 1) EXT4-fs warning (device loop3): ext4_expand_extra_isize_ea:2857: Unable to expand inode 15. Delete some EAs or run e2fsck. ------------[ cut here ]------------ EA inode 11 i_nlink=2 WARNING: fs/ext4/xattr.c:1058 at ext4_xattr_inode_update_ref+0x444/0x44c fs/ext4/xattr.c:1056, CPU#1: syz.3.24/6760 Modules linked in: CPU: 1 UID: 0 PID: 6760 Comm: syz.3.24 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : ext4_xattr_inode_update_ref+0x444/0x44c fs/ext4/xattr.c:1056 lr : ext4_xattr_inode_update_ref+0x444/0x44c fs/ext4/xattr.c:1056 sp : ffff8000a3f96e80 x29: ffff8000a3f96f20 x28: 0000000000000000 x27: 1fffe0001f02b1c5 x26: dfff800000000000 x25: ffff8000a3f96ea0 x24: ffff7000147f2dd4 x23: ffff800092e86000 x22: ffff0000f8158c78 x21: 0000000000000002 x20: 0000000000000001 x19: ffff0000f8158c38 x18: 1fffe00033781890 x17: ffff80008f86e000 x16: ffff800082e5c71c x15: 0000000000000001 x14: 1fffe0001c3a5150 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000080000 x10: 0000000000000003 x9 : d393a9aa8798a400 x8 : d393a9aa8798a400 x7 : ffff80008049e510 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff80008048fef4 x2 : 0000000000000001 x1 : ffff80008b5a9be0 x0 : 0000000000000001 Call trace: ext4_xattr_inode_update_ref+0x444/0x44c fs/ext4/xattr.c:1056 (P) ext4_xattr_inode_dec_ref fs/ext4/xattr.c:1081 [inline] ext4_xattr_inode_dec_ref_all+0x79c/0xc50 fs/ext4/xattr.c:1227 ext4_xattr_delete_inode+0x8b0/0xa40 fs/ext4/xattr.c:2951 ext4_evict_inode+0xb50/0x1058 fs/ext4/inode.c:270 evict+0x4e0/0xa74 fs/inode.c:837 iput_final fs/inode.c:1951 [inline] iput+0xc54/0xfdc fs/inode.c:2003 ext4_process_orphan+0x240/0x2b4 fs/ext4/orphan.c:358 ext4_orphan_cleanup+0x930/0x107c fs/ext4/orphan.c:472 __ext4_fill_super fs/ext4/super.c:5658 [inline] ext4_fill_super+0x47e8/0x4f5c fs/ext4/super.c:5777 get_tree_bdev_flags+0x360/0x414 fs/super.c:1691 get_tree_bdev+0x2c/0x3c fs/super.c:1714 ext4_get_tree+0x28/0x38 fs/ext4/super.c:5809 vfs_get_tree+0x90/0x28c fs/super.c:1751 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3636 [inline] do_new_mount+0x284/0x944 fs/namespace.c:3712 path_mount+0x5b4/0xdfc fs/namespace.c:4022 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount fs/namespace.c:4201 [inline] __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4201 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 irq event stamp: 26512 hardirqs last enabled at (26511): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1570 [inline] hardirqs last enabled at (26511): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:4995 hardirqs last disabled at (26512): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412 softirqs last enabled at (25812): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (25812): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:650 softirqs last disabled at (25749): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ end trace 0000000000000000 ]--- EXT4-fs (loop3): 1 orphan inode deleted EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000.