el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 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
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4621 at fs/btrfs/free-space-tree.c:1267 btrfs_clear_free_space_tree+0x6c0/0x9cc fs/btrfs/free-space-tree.c:1267
Modules linked in:
CPU: 1 PID: 4621 Comm: syz-executor.0 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : btrfs_clear_free_space_tree+0x6c0/0x9cc fs/btrfs/free-space-tree.c:1267
lr : btrfs_clear_free_space_tree+0x6c0/0x9cc fs/btrfs/free-space-tree.c:1267
sp : ffff80001f5c77a0
x29: ffff80001f5c7850 x28: 1fffe0001917300b x27: 0000000000000002
x26: dfff800000000000 x25: 0000000000000000 x24: 0000000000000006
x23: 1fffe0001bd31c4d x22: ffff0000c8b999d0 x21: ffff0000de98e268
x20: 00000000fffffff4 x19: ffff0000de98e210 x18: 0000000000000001
x17: 0000000000000000 x16: ffff8000111bc798 x15: 00000000ffffffff
x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : 3c6ab2470f241100
x8 : 3c6ab2470f241100 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff80001f5c7098 x4 : ffff80001424f400 x3 : ffff80000850433c
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026
Call trace:
 btrfs_clear_free_space_tree+0x6c0/0x9cc fs/btrfs/free-space-tree.c:1267
 btrfs_start_pre_rw_mount+0x240/0x568 fs/btrfs/disk-io.c:3079
 btrfs_remount+0xa98/0x12b8 fs/btrfs/super.c:2081
 legacy_reconfigure+0xf8/0x110 fs/fs_context.c:634
 reconfigure_super+0x1d4/0x6f4 fs/super.c:938
 do_remount fs/namespace.c:2670 [inline]
 path_mount+0xc80/0x1000 fs/namespace.c:3336
 do_mount fs/namespace.c:3357 [inline]
 __do_sys_mount fs/namespace.c:3565 [inline]
 __se_sys_mount fs/namespace.c:3542 [inline]
 __arm64_sys_mount+0x514/0x5e4 fs/namespace.c:3542
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 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: 82372
hardirqs last  enabled at (82371): [<ffff8000082f8f64>] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:257
hardirqs last disabled at (82372): [<ffff8000111b7ff8>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (82348): [<ffff80000819e9e8>] softirq_handle_end kernel/softirq.c:419 [inline]
softirqs last  enabled at (82348): [<ffff80000819e9e8>] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:604
softirqs last disabled at (82223): [<ffff80000819efec>] __do_softirq kernel/softirq.c:610 [inline]
softirqs last disabled at (82223): [<ffff80000819efec>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (82223): [<ffff80000819efec>] invoke_softirq kernel/softirq.c:457 [inline]
softirqs last disabled at (82223): [<ffff80000819efec>] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659
---[ end trace 80b0901206a7fec7 ]---
BTRFS: error (device loop0) in btrfs_clear_free_space_tree:1267: errno=-12 Out of memory
BTRFS warning (device loop0): failed to clear free space tree: -12