bucket 0:34 gen 0 data type user sector count overflow: 0 + -8 > U32_MAX
while marking u64s 7 type extent 4099:8:U32_MAX len 8 ver 0: durability: 1 crc: c_size 8 size 8 offset 0 nonce 0 csum none 0:0  compress incompressible ptr: 0:34:0 gen 0, continuing
=====================================================
BUG: KMSAN: uninit-value in bch2_alloc_to_v4_mut_inlined fs/bcachefs/alloc_background.c:447 [inline]
BUG: KMSAN: uninit-value in bch2_trans_start_alloc_update_noupdate fs/bcachefs/alloc_background.c:472 [inline]
BUG: KMSAN: uninit-value in bch2_trans_start_alloc_update+0x674/0x14b0 fs/bcachefs/alloc_background.c:487
 bch2_alloc_to_v4_mut_inlined fs/bcachefs/alloc_background.c:447 [inline]
 bch2_trans_start_alloc_update_noupdate fs/bcachefs/alloc_background.c:472 [inline]
 bch2_trans_start_alloc_update+0x674/0x14b0 fs/bcachefs/alloc_background.c:487
 bch2_trigger_pointer fs/bcachefs/buckets.c:588 [inline]
 __trigger_extent+0x2425/0x6810 fs/bcachefs/buckets.c:740
 bch2_trigger_extent+0x90e/0x11a0 fs/bcachefs/buckets.c:869
 bch2_key_trigger fs/bcachefs/bkey_methods.h:87 [inline]
 bch2_key_trigger_old fs/bcachefs/bkey_methods.h:101 [inline]
 run_one_trans_trigger fs/bcachefs/btree_trans_commit.c:512 [inline]
 run_btree_triggers+0xa30/0x16b0 fs/bcachefs/btree_trans_commit.c:540
 bch2_trans_commit_run_triggers fs/bcachefs/btree_trans_commit.c:572 [inline]
 __bch2_trans_commit+0x4a3/0xd190 fs/bcachefs/btree_trans_commit.c:1057
 bch2_trans_commit fs/bcachefs/btree_update.h:184 [inline]
 bch2_inode_delete_keys+0xe2b/0x1010 fs/bcachefs/inode.c:986
 bch2_inode_rm+0x1c1/0x1260 fs/bcachefs/inode.c:1015
 bch2_evict_inode+0x2d5/0x6a0 fs/bcachefs/fs.c:1836
 evict+0x723/0xd10 fs/inode.c:796
 iput_final fs/inode.c:1946 [inline]
 iput+0x97b/0xdb0 fs/inode.c:1972
 do_unlinkat+0x6aa/0xe20 fs/namei.c:4594
 __do_sys_unlink fs/namei.c:4635 [inline]
 __se_sys_unlink fs/namei.c:4633 [inline]
 __x64_sys_unlink+0x76/0xa0 fs/namei.c:4633
 x64_sys_call+0x2957/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:88
 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

Uninit was stored to memory at:
 memcpy_u64s_small fs/bcachefs/util.h:393 [inline]
 bkey_reassemble fs/bcachefs/bkey.h:513 [inline]
 btree_key_cache_create fs/bcachefs/btree_key_cache.c:259 [inline]
 btree_key_cache_fill+0x13da/0x3d60 fs/bcachefs/btree_key_cache.c:309
 bch2_btree_path_traverse_cached+0x988/0xe20 fs/bcachefs/btree_key_cache.c:361
 bch2_btree_path_traverse_one+0x749/0x47b0 fs/bcachefs/btree_iter.c:1159
 bch2_btree_path_traverse fs/bcachefs/btree_iter.h:247 [inline]
 bch2_btree_iter_peek_slot+0x10b7/0x3950 fs/bcachefs/btree_iter.c:2629
 __bch2_bkey_get_iter fs/bcachefs/btree_iter.h:575 [inline]
 bch2_bkey_get_iter fs/bcachefs/btree_iter.h:589 [inline]
 bch2_trans_start_alloc_update_noupdate fs/bcachefs/alloc_background.c:464 [inline]
 bch2_trans_start_alloc_update+0x3d8/0x14b0 fs/bcachefs/alloc_background.c:487
 bch2_trigger_pointer fs/bcachefs/buckets.c:588 [inline]
 __trigger_extent+0x2425/0x6810 fs/bcachefs/buckets.c:740
 bch2_trigger_extent+0x90e/0x11a0 fs/bcachefs/buckets.c:869
 bch2_key_trigger fs/bcachefs/bkey_methods.h:87 [inline]
 bch2_key_trigger_old fs/bcachefs/bkey_methods.h:101 [inline]
 run_one_trans_trigger fs/bcachefs/btree_trans_commit.c:512 [inline]
 run_btree_triggers+0xa30/0x16b0 fs/bcachefs/btree_trans_commit.c:540
 bch2_trans_commit_run_triggers fs/bcachefs/btree_trans_commit.c:572 [inline]
 __bch2_trans_commit+0x4a3/0xd190 fs/bcachefs/btree_trans_commit.c:1057
 bch2_trans_commit fs/bcachefs/btree_update.h:184 [inline]
 bch2_inode_delete_keys+0xe2b/0x1010 fs/bcachefs/inode.c:986
 bch2_inode_rm+0x1c1/0x1260 fs/bcachefs/inode.c:1015
 bch2_evict_inode+0x2d5/0x6a0 fs/bcachefs/fs.c:1836
 evict+0x723/0xd10 fs/inode.c:796
 iput_final fs/inode.c:1946 [inline]
 iput+0x97b/0xdb0 fs/inode.c:1972
 do_unlinkat+0x6aa/0xe20 fs/namei.c:4594
 __do_sys_unlink fs/namei.c:4635 [inline]
 __se_sys_unlink fs/namei.c:4633 [inline]
 __x64_sys_unlink+0x76/0xa0 fs/namei.c:4633
 x64_sys_call+0x2957/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:88
 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

Uninit was created at:
 ___kmalloc_large_node+0x22c/0x370 mm/slub.c:4253
 __kmalloc_large_node_noprof+0x3f/0x1e0 mm/slub.c:4270
 __do_kmalloc_node mm/slub.c:4286 [inline]
 __kmalloc_node_noprof+0xc96/0x1250 mm/slub.c:4304
 __kvmalloc_node_noprof+0xc0/0x2d0 mm/util.c:645
 btree_node_data_alloc fs/bcachefs/btree_cache.c:153 [inline]
 __bch2_btree_node_mem_alloc+0x2be/0xa80 fs/bcachefs/btree_cache.c:198
 bch2_fs_btree_cache_init+0x4e4/0xb50 fs/bcachefs/btree_cache.c:653
 bch2_fs_alloc fs/bcachefs/super.c:917 [inline]
 bch2_fs_open+0x4d3a/0x5b40 fs/bcachefs/super.c:2065
 bch2_fs_get_tree+0x983/0x22d0 fs/bcachefs/fs.c:2157
 vfs_get_tree+0xb1/0x5a0 fs/super.c:1814
 do_new_mount+0x71f/0x15e0 fs/namespace.c:3513
 path_mount+0x742/0x1f10 fs/namespace.c:3840
 do_mount fs/namespace.c:3853 [inline]
 __do_sys_mount fs/namespace.c:4063 [inline]
 __se_sys_mount+0x722/0x810 fs/namespace.c:4040
 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4040
 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: 5784 Comm: syz-executor Not tainted 6.13.0-rc6-syzkaller-00038-g09a0fa92e5b4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
=====================================================