=====================================================
BUG: KMSAN: uninit-value in bch2_alloc_to_v4_mut_inlined fs/bcachefs/alloc_background.c:441 [inline]
BUG: KMSAN: uninit-value in bch2_trans_start_alloc_update_noupdate fs/bcachefs/alloc_background.c:466 [inline]
BUG: KMSAN: uninit-value in bch2_trans_start_alloc_update+0x674/0x14b0 fs/bcachefs/alloc_background.c:481
 bch2_alloc_to_v4_mut_inlined fs/bcachefs/alloc_background.c:441 [inline]
 bch2_trans_start_alloc_update_noupdate fs/bcachefs/alloc_background.c:466 [inline]
 bch2_trans_start_alloc_update+0x674/0x14b0 fs/bcachefs/alloc_background.c:481
 bch2_trigger_pointer fs/bcachefs/buckets.c:587 [inline]
 __trigger_extent+0x1877/0x6450 fs/bcachefs/buckets.c:736
 bch2_trigger_extent+0x9fe/0x1210 fs/bcachefs/buckets.c:865
 bch2_key_trigger fs/bcachefs/bkey_methods.h:88 [inline]
 bch2_key_trigger_old fs/bcachefs/bkey_methods.h:102 [inline]
 btree_update_nodes_written_trans fs/bcachefs/btree_update_interior.c:634 [inline]
 btree_update_nodes_written fs/bcachefs/btree_update_interior.c:708 [inline]
 btree_interior_update_work+0x16e0/0x4830 fs/bcachefs/btree_update_interior.c:846
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xc1a/0x1e80 kernel/workqueue.c:3319
 worker_thread+0xea7/0x14f0 kernel/workqueue.c:3400
 kthread+0x6b9/0xef0 kernel/kthread.c:464
 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Uninit was stored to memory at:
 memcpy_u64s_small fs/bcachefs/util.h:416 [inline]
 bkey_reassemble fs/bcachefs/bkey.h:506 [inline]
 btree_key_cache_create fs/bcachefs/btree_key_cache.c:261 [inline]
 btree_key_cache_fill+0x142b/0x4b30 fs/bcachefs/btree_key_cache.c:319
 bch2_btree_path_traverse_cached+0x9fe/0xe90 fs/bcachefs/btree_key_cache.c:381
 bch2_btree_path_traverse_one+0x3ba6/0x4790 fs/bcachefs/btree_iter.c:1179
 bch2_btree_path_traverse fs/bcachefs/btree_iter.h:249 [inline]
 bch2_btree_iter_peek_slot+0xf43/0x3290 fs/bcachefs/btree_iter.c:2784
 __bch2_bkey_get_iter fs/bcachefs/btree_iter.h:585 [inline]
 bch2_bkey_get_iter fs/bcachefs/btree_iter.h:599 [inline]
 bch2_trans_start_alloc_update_noupdate fs/bcachefs/alloc_background.c:458 [inline]
 bch2_trans_start_alloc_update+0x3d8/0x14b0 fs/bcachefs/alloc_background.c:481
 bch2_trigger_pointer fs/bcachefs/buckets.c:587 [inline]
 __trigger_extent+0x1877/0x6450 fs/bcachefs/buckets.c:736
 bch2_trigger_extent+0x9fe/0x1210 fs/bcachefs/buckets.c:865
 bch2_key_trigger fs/bcachefs/bkey_methods.h:88 [inline]
 bch2_key_trigger_old fs/bcachefs/bkey_methods.h:102 [inline]
 btree_update_nodes_written_trans fs/bcachefs/btree_update_interior.c:634 [inline]
 btree_update_nodes_written fs/bcachefs/btree_update_interior.c:708 [inline]
 btree_interior_update_work+0x16e0/0x4830 fs/bcachefs/btree_update_interior.c:846
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xc1a/0x1e80 kernel/workqueue.c:3319
 worker_thread+0xea7/0x14f0 kernel/workqueue.c:3400
 kthread+0x6b9/0xef0 kernel/kthread.c:464
 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Uninit was created at:
 ___kmalloc_large_node+0x22c/0x370 mm/slub.c:4249
 __kmalloc_large_node_noprof+0x3f/0x1e0 mm/slub.c:4266
 __do_kmalloc_node mm/slub.c:4282 [inline]
 __kmalloc_node_noprof+0xc96/0x1250 mm/slub.c:4300
 __kvmalloc_node_noprof+0xc0/0x2d0 mm/util.c:665
 btree_node_data_alloc fs/bcachefs/btree_cache.c:156 [inline]
 bch2_btree_node_mem_alloc+0xa96/0x2f10 fs/bcachefs/btree_cache.c:835
 __bch2_btree_node_alloc fs/bcachefs/btree_update_interior.c:304 [inline]
 bch2_btree_reserve_get+0x37f/0x2290 fs/bcachefs/btree_update_interior.c:532
 bch2_btree_update_start+0x1af9/0x2d60 fs/bcachefs/btree_update_interior.c:1232
 bch2_btree_split_leaf+0x120/0xc90 fs/bcachefs/btree_update_interior.c:1853
 bch2_trans_commit_error+0x1c0/0x1d60 fs/bcachefs/btree_trans_commit.c:908
 __bch2_trans_commit+0x1d5f/0xd310 fs/bcachefs/btree_trans_commit.c:1089
 bch2_trans_commit fs/bcachefs/btree_update.h:191 [inline]
 bch2_journal_replay+0x3125/0x4e20 fs/bcachefs/recovery.c:373
 bch2_run_recovery_pass fs/bcachefs/recovery_passes.c:226 [inline]
 bch2_run_recovery_passes+0x5a2/0x1160 fs/bcachefs/recovery_passes.c:291
 bch2_fs_recovery+0x489c/0x6230 fs/bcachefs/recovery.c:936
 bch2_fs_start+0x7ca/0xc20 fs/bcachefs/super.c:1041
 bch2_fs_get_tree+0x1564/0x24e0 fs/bcachefs/fs.c:2203
 vfs_get_tree+0xb1/0x5a0 fs/super.c:1814
 do_new_mount+0x71f/0x15e0 fs/namespace.c:3560
 path_mount+0x742/0x1f10 fs/namespace.c:3887
 do_mount fs/namespace.c:3900 [inline]
 __do_sys_mount fs/namespace.c:4111 [inline]
 __se_sys_mount+0x71f/0x800 fs/namespace.c:4088
 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4088
 x64_sys_call+0x39bf/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 0 UID: 0 PID: 35 Comm: kworker/u8:2 Not tainted 6.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: btree_update btree_interior_update_work
=====================================================