=====================================================
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]
 search_leaf fs/btrfs/ctree.c:1964 [inline]
 btrfs_search_slot+0x3a51/0x4710 fs/btrfs/ctree.c:2177
 update_dev_stat_item fs/btrfs/volumes.c:7666 [inline]
 btrfs_run_dev_stats+0x3f6/0x16d0 fs/btrfs/volumes.c:7743
 commit_cowonly_roots+0x340/0x1120 fs/btrfs/transaction.c:1288
 btrfs_commit_transaction+0x2346/0x6810 fs/btrfs/transaction.c:2398
 btrfs_commit_super+0x13c/0x180 fs/btrfs/disk-io.c:4604
 close_ctree+0x3e1/0x1480 fs/btrfs/disk-io.c:4758
 btrfs_put_super+0x3c/0x50 fs/btrfs/super.c:81
 generic_shutdown_super+0x190/0x570 fs/super.c:492
 kill_anon_super+0x3d/0x70 fs/super.c:1086
 btrfs_kill_super+0x3d/0x60 fs/btrfs/super.c:2132
 deactivate_locked_super+0xc0/0x150 fs/super.c:332
 deactivate_super+0x14b/0x160 fs/super.c:363
 cleanup_mnt+0x6b5/0x730 fs/namespace.c:1291
 __cleanup_mnt+0x22/0x30 fs/namespace.c:1298
 task_work_run+0x263/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0x2a9/0x320 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0x16e/0x230 kernel/entry/common.c:203
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x2a/0x140 kernel/entry/common.c:296
 __do_fast_syscall_32+0xb1/0x100 arch/x86/entry/common.c:181
 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
 update_dev_stat_item fs/btrfs/volumes.c:7666 [inline]
 btrfs_run_dev_stats+0x3f6/0x16d0 fs/btrfs/volumes.c:7743
 commit_cowonly_roots+0x340/0x1120 fs/btrfs/transaction.c:1288
 btrfs_commit_transaction+0x2346/0x6810 fs/btrfs/transaction.c:2398
 btrfs_commit_super+0x13c/0x180 fs/btrfs/disk-io.c:4604
 close_ctree+0x3e1/0x1480 fs/btrfs/disk-io.c:4758
 btrfs_put_super+0x3c/0x50 fs/btrfs/super.c:81
 generic_shutdown_super+0x190/0x570 fs/super.c:492
 kill_anon_super+0x3d/0x70 fs/super.c:1086
 btrfs_kill_super+0x3d/0x60 fs/btrfs/super.c:2132
 deactivate_locked_super+0xc0/0x150 fs/super.c:332
 deactivate_super+0x14b/0x160 fs/super.c:363
 cleanup_mnt+0x6b5/0x730 fs/namespace.c:1291
 __cleanup_mnt+0x22/0x30 fs/namespace.c:1298
 task_work_run+0x263/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0x2a9/0x320 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0x16e/0x230 kernel/entry/common.c:203
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x2a/0x140 kernel/entry/common.c:296
 __do_fast_syscall_32+0xb1/0x100 arch/x86/entry/common.c:181
 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: 3941 Comm: syz-executor.3 Not tainted 6.2.0-syzkaller-81151-g224e1375d540 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
=====================================================