el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
BTRFS error (device loop0): failed to run delayed ref for logical 5255168 num_bytes 4096 type 176 action 2 ref_mod 1: -12
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4395 at fs/btrfs/extent-tree.c:2173 btrfs_run_delayed_refs+0x3e8/0x460 fs/btrfs/extent-tree.c:2173
Modules linked in:
CPU: 0 PID: 4395 Comm: syz-executor.0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : btrfs_run_delayed_refs+0x3e8/0x460 fs/btrfs/extent-tree.c:2173
lr : btrfs_run_delayed_refs+0x3e8/0x460 fs/btrfs/extent-tree.c:2173
sp : ffff80001f2f7570
x29: ffff80001f2f7580 x28: ffff0000c177a000 x27: dfff800000000000
x26: dfff800000000000 x25: ffff0000dedf3160 x24: 1fffe0001bdbe637
x23: ffff0000dedf31b8 x22: 00000000fffffff4 x21: 0000000000000000
x20: 00000000fffffff4 x19: ffff0000dedf3160 x18: 0000000000000000
x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000
x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000
x11: ff8080000830061c x10: 0000000000000000 x9 : be438c26ca6b2600
x8 : be438c26ca6b2600 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff80001f2f6e78 x4 : ffff80001446f500 x3 : ffff80000850f688
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026
Call trace:
 btrfs_run_delayed_refs+0x3e8/0x460 fs/btrfs/extent-tree.c:2173
 btrfs_commit_transaction+0x1d8/0x30ac fs/btrfs/transaction.c:2169
 btrfs_sync_fs+0x240/0xb2c fs/btrfs/super.c:1454
 sync_filesystem+0x1a0/0x218 fs/sync.c:66
 btrfs_remount+0x190/0x12ac fs/btrfs/super.c:1927
 legacy_reconfigure+0xfc/0x114 fs/fs_context.c:634
 reconfigure_super+0x1d0/0x6c4 fs/super.c:938
 do_remount fs/namespace.c:2697 [inline]
 path_mount+0xd20/0xfe8 fs/namespace.c:3356
 do_mount fs/namespace.c:3377 [inline]
 __do_sys_mount fs/namespace.c:3585 [inline]
 __se_sys_mount fs/namespace.c:3562 [inline]
 __arm64_sys_mount+0x488/0x5f8 fs/namespace.c:3562
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x28c arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x5c/0x140 arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1d0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 81942
hardirqs last  enabled at (81941): [<ffff8000082fe98c>] __up_console_sem+0xb4/0xfc kernel/printk/printk.c:257
hardirqs last disabled at (81942): [<ffff800011349e40>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (81894): [<ffff8000081a2b70>] softirq_handle_end kernel/softirq.c:419 [inline]
softirqs last  enabled at (81894): [<ffff8000081a2b70>] handle_softirqs+0xa70/0xc14 kernel/softirq.c:604
softirqs last disabled at (81821): [<ffff8000081a3178>] __do_softirq kernel/softirq.c:610 [inline]
softirqs last disabled at (81821): [<ffff8000081a3178>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (81821): [<ffff8000081a3178>] invoke_softirq kernel/softirq.c:457 [inline]
softirqs last disabled at (81821): [<ffff8000081a3178>] __irq_exit_rcu+0x240/0x434 kernel/softirq.c:659
---[ end trace 811c90d7563d9f72 ]---
BTRFS: error (device loop0) in btrfs_run_delayed_refs:2173: errno=-12 Out of memory
BTRFS info (device loop0): forced readonly
BTRFS error (device loop0): Remounting read-write after error is not allowed