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: 0 PID: 4931 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: 0 PID: 4931 Comm: syz-executor.0 Not tainted 5.15.181-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
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 : ffff80001f9777a0
x29: ffff80001f977850 x28: 1fffe0001b4eb00b x27: 0000000000000002
x26: dfff800000000000 x25: 0000000000000000 x24: 0000000000000006
x23: 1fffe0001b9f04a5 x22: ffff0000da7599d0 x21: ffff0000dcf82528
x20: 00000000fffffff4 x19: ffff0000dcf824d0 x18: 0000000000000001
x17: 0000000000000000 x16: ffff8000111a3970 x15: 00000000ffffffff
x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : ac186867d4a7cf00
x8 : ac186867d4a7cf00 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff80001f977098 x4 : ffff80001422f280 x3 : ffff800008503848
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:2669 [inline]
 path_mount+0xc80/0x1000 fs/namespace.c:3335
 do_mount fs/namespace.c:3356 [inline]
 __do_sys_mount fs/namespace.c:3564 [inline]
 __se_sys_mount fs/namespace.c:3541 [inline]
 __arm64_sys_mount+0x514/0x5e4 fs/namespace.c:3541
 __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: 80430
hardirqs last  enabled at (80429): [<ffff8000082f7640>] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:257
hardirqs last disabled at (80430): [<ffff80001119f244>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (80406): [<ffff80000819d0d8>] softirq_handle_end kernel/softirq.c:401 [inline]
softirqs last  enabled at (80406): [<ffff80000819d0d8>] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:586
softirqs last disabled at (80351): [<ffff80000819d6dc>] __do_softirq kernel/softirq.c:592 [inline]
softirqs last disabled at (80351): [<ffff80000819d6dc>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (80351): [<ffff80000819d6dc>] invoke_softirq kernel/softirq.c:439 [inline]
softirqs last disabled at (80351): [<ffff80000819d6dc>] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:641
---[ end trace 842b21a5db7f0014 ]---
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