BTRFS info (device loop5): using free space tree
BTRFS info (device loop5): enabling ssd optimizations
BTRFS info (device loop5): auto enabling async discard
=====================================================
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 generic_bin_search+0x784/0xb80 fs/btrfs/ctree.c:913
 btrfs_comp_cpu_keys fs/btrfs/ctree.c:753 [inline]
 comp_keys fs/btrfs/ctree.c:729 [inline]
 generic_bin_search+0x784/0xb80 fs/btrfs/ctree.c:913
 search_for_key_slot fs/btrfs/ctree.c:1872 [inline]
 btrfs_search_slot+0x1caa/0x4710 fs/btrfs/ctree.c:2184
 btrfs_lookup_match_dir fs/btrfs/dir-item.c:187 [inline]
 btrfs_lookup_dir_item+0x196/0x360 fs/btrfs/dir-item.c:225
 __btrfs_unlink_inode+0x1a9/0x1570 fs/btrfs/inode.c:4308
 btrfs_unlink_inode fs/btrfs/inode.c:4397 [inline]
 btrfs_unlink+0x26e/0x600 fs/btrfs/inode.c:4450
 vfs_unlink+0x66f/0xa20 fs/namei.c:4252
 do_unlinkat+0x881/0xf60 fs/namei.c:4320
 __do_sys_unlinkat fs/namei.c:4363 [inline]
 __se_sys_unlinkat fs/namei.c:4356 [inline]
 __ia32_sys_unlinkat+0x17c/0x220 fs/namei.c:4356
 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+0x9f6/0xe90 mm/page_alloc.c:5572
 alloc_pages+0xab0/0xd80 mm/mempolicy.c:2287
 folio_alloc+0x42/0x120 mm/mempolicy.c:2297
 filemap_alloc_folio+0xb2/0x460 mm/filemap.c:972
 __filemap_get_folio+0xe4b/0x1920 mm/filemap.c:1966
 pagecache_get_page+0x4f/0x290 mm/folio-compat.c:98
 find_or_create_page include/linux/pagemap.h:612 [inline]
 alloc_extent_buffer+0x733/0x3190 fs/btrfs/extent_io.c:4500
 btrfs_find_create_tree_block+0x46/0x60 fs/btrfs/disk-io.c:1002
 btrfs_init_new_buffer fs/btrfs/extent-tree.c:4873 [inline]
 btrfs_alloc_tree_block+0x371/0x1f70 fs/btrfs/extent-tree.c:4992
 __btrfs_cow_block+0x578/0x1f20 fs/btrfs/ctree.c:541
 btrfs_cow_block+0x7cc/0xa00 fs/btrfs/ctree.c:696
 btrfs_search_slot+0x189f/0x4710 fs/btrfs/ctree.c:2141
 btrfs_lookup_match_dir fs/btrfs/dir-item.c:187 [inline]
 btrfs_lookup_dir_item+0x196/0x360 fs/btrfs/dir-item.c:225
 __btrfs_unlink_inode+0x1a9/0x1570 fs/btrfs/inode.c:4308
 btrfs_unlink_inode fs/btrfs/inode.c:4397 [inline]
 btrfs_unlink+0x26e/0x600 fs/btrfs/inode.c:4450
 vfs_unlink+0x66f/0xa20 fs/namei.c:4252
 do_unlinkat+0x881/0xf60 fs/namei.c:4320
 __do_sys_unlinkat fs/namei.c:4363 [inline]
 __se_sys_unlinkat fs/namei.c:4356 [inline]
 __ia32_sys_unlinkat+0x17c/0x220 fs/namei.c:4356
 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: 6084 Comm: syz-executor.5 Not tainted 6.2.0-syzkaller-81151-g224e1375d540 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
=====================================================