=====================================================
BUG: KMSAN: uninit-value in bch2_alloc_to_v4 fs/bcachefs/alloc_background.h:233 [inline]
BUG: KMSAN: uninit-value in bch2_bucket_alloc_early+0xe70/0x2950 fs/bcachefs/alloc_foreground.c:354
 bch2_alloc_to_v4 fs/bcachefs/alloc_background.h:233 [inline]
 bch2_bucket_alloc_early+0xe70/0x2950 fs/bcachefs/alloc_foreground.c:354
 bch2_bucket_alloc_trans+0x9c5/0x3290 fs/bcachefs/alloc_foreground.c:575
 bch2_bucket_alloc_set_trans+0x92c/0x1620 fs/bcachefs/alloc_foreground.c:730
 __open_bucket_add_buckets+0x1e6e/0x30f0 fs/bcachefs/alloc_foreground.c:973
 open_bucket_add_buckets+0x328/0x530 fs/bcachefs/alloc_foreground.c:1017
 bch2_alloc_sectors_start_trans+0x1730/0x32b0 fs/bcachefs/alloc_foreground.c:1340
 __bch2_btree_node_alloc fs/bcachefs/btree_update_interior.c:322 [inline]
 bch2_btree_reserve_get+0x9d6/0x2290 fs/bcachefs/btree_update_interior.c:532
 bch2_btree_update_start+0x1af9/0x2d60 fs/bcachefs/btree_update_interior.c:1232
 bch2_btree_node_rewrite+0x1d7/0x1ae0 fs/bcachefs/btree_update_interior.c:2144
 async_btree_node_rewrite_trans fs/bcachefs/btree_update_interior.c:2217 [inline]
 async_btree_node_rewrite_work+0x74c/0x1aa0 fs/bcachefs/btree_update_interior.c:2253
 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:662
 btree_node_data_alloc fs/bcachefs/btree_cache.c:156 [inline]
 __bch2_btree_node_mem_alloc+0x2be/0xa80 fs/bcachefs/btree_cache.c:201
 bch2_fs_btree_cache_init+0x4f0/0xb60 fs/bcachefs/btree_cache.c:655
 bch2_fs_alloc fs/bcachefs/super.c:919 [inline]
 bch2_fs_open+0x4d84/0x5ba0 fs/bcachefs/super.c:2064
 bch2_fs_get_tree+0x98a/0x24e0 fs/bcachefs/fs.c:2190
 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: 4075 Comm: kworker/u8:21 Not tainted 6.14.0-rc4-syzkaller-00090-gdd83757f6e68 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: btree_node_rewrite async_btree_node_rewrite_work
=====================================================