------------[ cut here ]------------
WARNING: CPU: 1 PID: 5920 at fs/bcachefs/btree_iter.c:3194 __bch2_trans_kmalloc+0x50e/0x9d0 fs/bcachefs/btree_iter.c:3194
Modules linked in:
CPU: 1 UID: 0 PID: 5920 Comm: kworker/1:4 Tainted: G        W           syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: bcachefs_write_ref bch2_do_discards_work
RIP: 0010:__bch2_trans_kmalloc+0x50e/0x9d0 fs/bcachefs/btree_iter.c:3194
Code: 00 28 00 00 e8 03 60 35 00 48 c7 c0 75 f7 ff ff 48 83 c4 48 5b 41 5c 41 5d 41 5e 41 5f 5d e9 89 e1 da 06 cc e8 93 6d 9f fd 90 <0f> 0b 90 e9 d4 fb ff ff e8 85 6d 9f fd 90 0f 0b 90 e9 dc fd ff ff
RSP: 0018:ffffc90005056a70 EFLAGS: 00010293
RAX: ffffffff841eee5d RBX: ffff888075798000 RCX: ffff888030f41dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000020000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc90005056d80 R11: fffffbfff1e3a7c7 R12: dffffc0000000000
R13: ffff888075798030 R14: 1ffff1100eaf3000 R15: 0000000000000011
FS:  0000000000000000(0000) GS:ffff8881269c5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f38e5734000 CR3: 000000002f676000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 bch2_trans_kmalloc_nomemzero_ip fs/bcachefs/btree_iter.h:586 [inline]
 bch2_trans_kmalloc_nomemzero fs/bcachefs/btree_iter.h:621 [inline]
 bch2_alloc_sectors_start_trans+0x1d6b/0x1e90 fs/bcachefs/alloc_foreground.c:1251
 __bch2_btree_node_alloc fs/bcachefs/btree_update_interior.c:320 [inline]
 bch2_btree_reserve_get+0x641/0x1820 fs/bcachefs/btree_update_interior.c:534
 bch2_btree_update_start+0x18ff/0x1de0 fs/bcachefs/btree_update_interior.c:1289
 bch2_btree_split_leaf+0x14b/0x8e0 fs/bcachefs/btree_update_interior.c:1921
 bch2_trans_commit_error+0x1b7/0x1130 fs/bcachefs/btree_trans_commit.c:914
 __bch2_trans_commit+0x1bb5/0x8870 fs/bcachefs/btree_trans_commit.c:1104
 bch2_trans_commit fs/bcachefs/btree_update.h:241 [inline]
 bch2_discard_one_bucket+0xa32/0x11a0 fs/bcachefs/alloc_background.c:1913
 bch2_do_discards_work+0x3b3/0x9c0 fs/bcachefs/alloc_background.c:1947
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>