------------[ cut here ]------------
WARNING: CPU: 1 PID: 6603 at fs/bcachefs/btree_iter.c:3194 __bch2_trans_kmalloc+0x4cc/0x96c fs/bcachefs/btree_iter.c:3194
Modules linked in:
CPU: 1 UID: 0 PID: 6603 Comm: kworker/1:6 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Workqueue: bcachefs_write_ref bch2_do_discards_work
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : __bch2_trans_kmalloc+0x4cc/0x96c fs/bcachefs/btree_iter.c:3194
lr : __bch2_trans_kmalloc+0x4cc/0x96c fs/bcachefs/btree_iter.c:3194
sp : ffff8000a2f56970
x29: ffff8000a2f569a0 x28: dfff800000000000 x27: 1fffe000185e2000
x26: 0000000000010000 x25: ffff0000c2f10034 x24: ffff0000c2f10030
x23: 1fffe000185e2006 x22: 000000000000002f x21: 0000000000020000
x20: 6fbe8000827fcb80 x19: ffff0000c2f10000 x18: 00000000ffffffff
x17: ffff800093605000 x16: ffff80008b065ce0 x15: 0000000000000001
x14: 1ffff000145ead60 x13: 0000000000000000 x12: 0000000000000000
x11: ffff7000145ead61 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : ffff0000ce34bd00 x7 : 0000000000000003 x6 : 0000000000000001
x5 : 0000000000000001 x4 : ffff8000a2f56df0 x3 : ffff0000ff59dbc0
x2 : ffff8000827fcac0 x1 : 0000000000020000 x0 : 0000000000010000
Call trace:
 __bch2_trans_kmalloc+0x4cc/0x96c fs/bcachefs/btree_iter.c:3194 (P)
 bch2_trans_kmalloc_nomemzero_ip fs/bcachefs/btree_iter.h:586 [inline]
 bch2_trans_kmalloc_nomemzero+0xe4/0x13c fs/bcachefs/btree_iter.h:621
 bch2_alloc_sectors_start_trans+0x78/0x1880 fs/bcachefs/alloc_foreground.c:1251
 __bch2_btree_node_alloc fs/bcachefs/btree_update_interior.c:320 [inline]
 bch2_btree_reserve_get+0x4ec/0xe80 fs/bcachefs/btree_update_interior.c:534
 bch2_btree_update_start+0x15b4/0x1ab8 fs/bcachefs/btree_update_interior.c:1289
 bch2_btree_split_leaf+0x118/0x71c fs/bcachefs/btree_update_interior.c:1921
 bch2_trans_commit_error+0x17c/0x11a0 fs/bcachefs/btree_trans_commit.c:914
 __bch2_trans_commit+0x17a4/0x625c fs/bcachefs/btree_trans_commit.c:1104
 bch2_trans_commit fs/bcachefs/btree_update.h:241 [inline]
 bch2_discard_one_bucket+0x680/0xcd8 fs/bcachefs/alloc_background.c:1913
 bch2_do_discards_work+0x210/0x740 fs/bcachefs/alloc_background.c:1947
 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x958/0xed8 kernel/workqueue.c:3400
 kthread+0x5fc/0x75c kernel/kthread.c:463
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844
irq event stamp: 108984
hardirqs last  enabled at (108983): [<ffff80008b0878f8>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last  enabled at (108983): [<ffff80008b0878f8>] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194
hardirqs last disabled at (108984): [<ffff80008b05ee64>] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:434
softirqs last  enabled at (108760): [<ffff8000803db160>] softirq_handle_end kernel/softirq.c:425 [inline]
softirqs last  enabled at (108760): [<ffff8000803db160>] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607
softirqs last disabled at (108737): [<ffff800080022028>] __do_softirq+0x14/0x20 kernel/softirq.c:613
---[ end trace 0000000000000000 ]---
bcachefs (loop1): bch2_btree_update_start(): error ENOMEM_trans_kmalloc