syzbot

BTRFS warning (device loop2): the 'inode_cache' option is deprecated and has no effect since 5.11
BTRFS info (device loop2): force zlib compression, level 3
BTRFS info (device loop2): allowing degraded mounts
BTRFS info (device loop2): using free space tree
BTRFS info (device loop2): auto enabling async discard
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BUG: KMSAN: uninit-value in btrfs_comp_cpu_keys fs/btrfs/ctree.c:769 [inline]
BUG: KMSAN: uninit-value in comp_keys fs/btrfs/ctree.c:745 [inline]
BUG: KMSAN: uninit-value in btrfs_bin_search+0x74c/0xb30 fs/btrfs/ctree.c:935
 btrfs_comp_cpu_keys fs/btrfs/ctree.c:769 [inline]
 comp_keys fs/btrfs/ctree.c:745 [inline]
 btrfs_bin_search+0x74c/0xb30 fs/btrfs/ctree.c:935
 search_for_key_slot fs/btrfs/ctree.c:1925 [inline]
 btrfs_search_slot+0x1adc/0x4680 fs/btrfs/ctree.c:2237
 btrfs_insert_empty_items+0xb3/0x220 fs/btrfs/ctree.c:4376
 btrfs_create_new_inode+0x1aa3/0x3e30 fs/btrfs/inode.c:6426
 btrfs_create_common+0x267/0x3b0 fs/btrfs/inode.c:6657
 btrfs_create+0x16b/0x210 fs/btrfs/inode.c:6697
 lookup_open fs/namei.c:3492 [inline]
 open_last_lookups fs/namei.c:3560 [inline]
 path_openat+0x2ca4/0x5a00 fs/namei.c:3790
 do_filp_open+0x20d/0x590 fs/namei.c:3820
 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1407
 do_sys_open fs/open.c:1422 [inline]
 __do_sys_creat fs/open.c:1498 [inline]
 __se_sys_creat fs/open.c:1492 [inline]
 __ia32_sys_creat+0xe4/0x140 fs/open.c:1492
 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:4500
 alloc_pages+0xd01/0x1040
 folio_alloc+0x42/0x120 mm/mempolicy.c:2308
 filemap_alloc_folio+0xa5/0x430 mm/filemap.c:979
 __filemap_get_folio+0x908/0x13a0 mm/filemap.c:1933
 pagecache_get_page+0x4e/0x200 mm/folio-compat.c:99
 find_or_create_page include/linux/pagemap.h:639 [inline]
 alloc_extent_buffer+0x6e8/0x2e60 fs/btrfs/extent_io.c:3601
 btrfs_find_create_tree_block+0x46/0x60 fs/btrfs/disk-io.c:588
 btrfs_init_new_buffer fs/btrfs/extent-tree.c:4771 [inline]
 btrfs_alloc_tree_block+0x344/0x1d10 fs/btrfs/extent-tree.c:4892
 __btrfs_cow_block+0x57a/0x2200 fs/btrfs/ctree.c:546
 btrfs_cow_block+0x7cc/0xa00 fs/btrfs/ctree.c:712
 btrfs_search_slot+0x16fb/0x4680 fs/btrfs/ctree.c:2194
 btrfs_insert_empty_items+0xb3/0x220 fs/btrfs/ctree.c:4376
 btrfs_create_new_inode+0x1aa3/0x3e30 fs/btrfs/inode.c:6426
 btrfs_create_common+0x267/0x3b0 fs/btrfs/inode.c:6657
 btrfs_create+0x16b/0x210 fs/btrfs/inode.c:6697
 lookup_open fs/namei.c:3492 [inline]
 open_last_lookups fs/namei.c:3560 [inline]
 path_openat+0x2ca4/0x5a00 fs/namei.c:3790
 do_filp_open+0x20d/0x590 fs/namei.c:3820
 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1407
 do_sys_open fs/open.c:1422 [inline]
 __do_sys_creat fs/open.c:1498 [inline]
 __se_sys_creat fs/open.c:1492 [inline]
 __ia32_sys_creat+0xe4/0x140 fs/open.c:1492
 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: 1 PID: 7128 Comm: syz-executor.2 Not tainted 6.5.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
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