loop6: detected capacity change from 0 to 32768
ocfs2: Mounting device (7,6) on (node local, slot 0) with writeback data mode.
=====================================================
BUG: KMSAN: uninit-value in ocfs2_find_smallest_chain fs/ocfs2/suballoc.c:412 [inline]
BUG: KMSAN: uninit-value in ocfs2_block_group_alloc_contig fs/ocfs2/suballoc.c:430 [inline]
BUG: KMSAN: uninit-value in ocfs2_block_group_alloc fs/ocfs2/suballoc.c:699 [inline]
BUG: KMSAN: uninit-value in ocfs2_reserve_suballoc_bits+0x15f4/0x71b0 fs/ocfs2/suballoc.c:832
 ocfs2_find_smallest_chain fs/ocfs2/suballoc.c:412 [inline]
 ocfs2_block_group_alloc_contig fs/ocfs2/suballoc.c:430 [inline]
 ocfs2_block_group_alloc fs/ocfs2/suballoc.c:699 [inline]
 ocfs2_reserve_suballoc_bits+0x15f4/0x71b0 fs/ocfs2/suballoc.c:832
 ocfs2_reserve_new_metadata_blocks+0x44f/0xcb0 fs/ocfs2/suballoc.c:982
 ocfs2_reserve_new_metadata fs/ocfs2/suballoc.c:1025 [inline]
 ocfs2_lock_allocators+0x2d4/0x990 fs/ocfs2/suballoc.c:2735
 ocfs2_extend_allocation+0x630/0x2710 fs/ocfs2/file.c:589
 ocfs2_allocate_unwritten_extents+0x432/0xc00 fs/ocfs2/file.c:1496
 __ocfs2_change_file_space+0xec6/0x19e0 fs/ocfs2/file.c:2023
 ocfs2_fallocate+0x392/0x3c0 fs/ocfs2/file.c:2138
 vfs_fallocate+0x79e/0x860 fs/open.c:338
 ksys_fallocate fs/open.c:362 [inline]
 __do_sys_fallocate fs/open.c:367 [inline]
 __se_sys_fallocate fs/open.c:365 [inline]
 __x64_sys_fallocate+0x148/0x280 fs/open.c:365
 x64_sys_call+0x4c9/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:286
 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:
 __alloc_frozen_pages_noprof+0x9a7/0xe00 mm/page_alloc.c:4763
 alloc_pages_mpol+0x4cd/0x890 mm/mempolicy.c:2270
 alloc_frozen_pages_noprof mm/mempolicy.c:2341 [inline]
 alloc_pages_noprof mm/mempolicy.c:2361 [inline]
 folio_alloc_noprof+0x1dc/0x350 mm/mempolicy.c:2371
 filemap_alloc_folio_noprof+0xa6/0x440 mm/filemap.c:1018
 __filemap_get_folio+0xb40/0x18e0 mm/filemap.c:1969
 grow_dev_folio fs/buffer.c:1039 [inline]
 grow_buffers fs/buffer.c:1105 [inline]
 __getblk_slow fs/buffer.c:1131 [inline]
 bdev_getblk+0x2c9/0xab0 fs/buffer.c:1431
 __getblk include/linux/buffer_head.h:380 [inline]
 sb_getblk include/linux/buffer_head.h:386 [inline]
 ocfs2_read_blocks_sync+0x37f/0x1020 fs/ocfs2/buffer_head_io.c:109
 ocfs2_read_locked_inode fs/ocfs2/inode.c:517 [inline]
 ocfs2_iget+0xf39/0x2cd0 fs/ocfs2/inode.c:159
 _ocfs2_get_system_file_inode fs/ocfs2/sysfile.c:142 [inline]
 ocfs2_get_system_file_inode+0x546/0xc30 fs/ocfs2/sysfile.c:112
 ocfs2_init_local_system_inodes fs/ocfs2/super.c:491 [inline]
 ocfs2_mount_volume fs/ocfs2/super.c:1756 [inline]
 ocfs2_fill_super+0x6ec3/0xb550 fs/ocfs2/super.c:1083
 get_tree_bdev_flags+0x6ec/0x910 fs/super.c:1636
 get_tree_bdev+0x37/0x50 fs/super.c:1659
 ocfs2_get_tree+0x34/0x40 fs/ocfs2/super.c:1184
 vfs_get_tree+0xb1/0x5a0 fs/super.c:1814
 do_new_mount+0x71f/0x15e0 fs/namespace.c:3560
 path_mount+0x742/0x1f10 fs/namespace.c:3887
 do_mount fs/namespace.c:3900 [inline]
 __do_sys_mount fs/namespace.c:4111 [inline]
 __se_sys_mount+0x71f/0x800 fs/namespace.c:4088
 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4088
 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: 8099 Comm: syz.6.426 Not tainted 6.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
=====================================================