BTRFS info (device loop0): using blake2b (blake2b-256-generic) checksum algorithm
BTRFS info (device loop0): turning on sync discard
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): enabling ssd optimizations
=====================================================
BUG: KMSAN: uninit-value in btrfs_comp_cpu_keys fs/btrfs/ctree.c:753 [inline]
BUG: KMSAN: uninit-value in comp_keys fs/btrfs/ctree.c:729 [inline]
BUG: KMSAN: uninit-value in btrfs_generic_bin_search+0x74c/0xb30 fs/btrfs/ctree.c:918
 btrfs_comp_cpu_keys fs/btrfs/ctree.c:753 [inline]
 comp_keys fs/btrfs/ctree.c:729 [inline]
 btrfs_generic_bin_search+0x74c/0xb30 fs/btrfs/ctree.c:918
 search_for_key_slot fs/btrfs/ctree.c:1867 [inline]
 btrfs_search_slot+0x1be9/0x44e0 fs/btrfs/ctree.c:2179
 btrfs_insert_empty_items+0xb3/0x220 fs/btrfs/ctree.c:4202
 btrfs_create_new_inode+0x188e/0x3d30 fs/btrfs/inode.c:6332
 btrfs_create_common+0x267/0x3b0 fs/btrfs/inode.c:6563
 btrfs_create+0x16b/0x210 fs/btrfs/inode.c:6603
 lookup_open fs/namei.c:3416 [inline]
 open_last_lookups fs/namei.c:3484 [inline]
 path_openat+0x2c9f/0x5a00 fs/namei.c:3712
 do_filp_open+0x20d/0x590 fs/namei.c:3742
 do_sys_openat2+0x1e9/0x8a0 fs/open.c:1348
 do_sys_open fs/open.c:1364 [inline]
 __do_compat_sys_open fs/open.c:1415 [inline]
 __se_compat_sys_open fs/open.c:1413 [inline]
 __ia32_compat_sys_open+0x26c/0x2c0 fs/open.c:1413
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

Uninit was created at:
 __alloc_pages+0x9a4/0xe00 mm/page_alloc.c:5615
 alloc_pages+0xd01/0x1040
 folio_alloc+0x42/0x120 mm/mempolicy.c:2287
 filemap_alloc_folio+0xa5/0x430 mm/filemap.c:976
 __filemap_get_folio+0xe02/0x1850 mm/filemap.c:1970
 pagecache_get_page+0x4f/0x290 mm/folio-compat.c:99
 find_or_create_page include/linux/pagemap.h:632 [inline]
 alloc_extent_buffer+0x6c5/0x31d0 fs/btrfs/extent_io.c:4044
 btrfs_find_create_tree_block+0x46/0x60 fs/btrfs/disk-io.c:835
 btrfs_init_new_buffer fs/btrfs/extent-tree.c:4799 [inline]
 btrfs_alloc_tree_block+0x344/0x1d20 fs/btrfs/extent-tree.c:4918
 __btrfs_cow_block+0x562/0x1d50 fs/btrfs/ctree.c:541
 btrfs_cow_block+0x7cc/0xa00 fs/btrfs/ctree.c:696
 btrfs_search_slot+0x180e/0x44e0 fs/btrfs/ctree.c:2136
 btrfs_insert_empty_items+0xb3/0x220 fs/btrfs/ctree.c:4202
 btrfs_create_new_inode+0x188e/0x3d30 fs/btrfs/inode.c:6332
 btrfs_create_common+0x267/0x3b0 fs/btrfs/inode.c:6563
 btrfs_create+0x16b/0x210 fs/btrfs/inode.c:6603
 lookup_open fs/namei.c:3416 [inline]
 open_last_lookups fs/namei.c:3484 [inline]
 path_openat+0x2c9f/0x5a00 fs/namei.c:3712
 do_filp_open+0x20d/0x590 fs/namei.c:3742
 do_sys_openat2+0x1e9/0x8a0 fs/open.c:1348
 do_sys_open fs/open.c:1364 [inline]
 __do_compat_sys_open fs/open.c:1415 [inline]
 __se_compat_sys_open fs/open.c:1413 [inline]
 __ia32_compat_sys_open+0x26c/0x2c0 fs/open.c:1413
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

CPU: 0 PID: 12707 Comm: syz-executor.0 Tainted: G        W          6.3.0-syzkaller-g81af97bdef5e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
=====================================================