=====================================================
BUG: KMSAN: uninit-value in crc32_body lib/crc32.c:110 [inline]
BUG: KMSAN: uninit-value in crc32_le_generic lib/crc32.c:179 [inline]
BUG: KMSAN: uninit-value in crc32_le_base+0x43c/0xd80 lib/crc32.c:197
 crc32_body lib/crc32.c:110 [inline]
 crc32_le_generic lib/crc32.c:179 [inline]
 crc32_le_base+0x43c/0xd80 lib/crc32.c:197
 nilfs_segbuf_fill_in_data_crc fs/nilfs2/segbuf.c:224 [inline]
 nilfs_add_checksums_on_logs+0xbe4/0xf60 fs/nilfs2/segbuf.c:327
 nilfs_segctor_do_construct+0xa0a3/0xe3e0 fs/nilfs2/segment.c:2115
 nilfs_segctor_construct+0x1eb/0xe30 fs/nilfs2/segment.c:2418
 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2526 [inline]
 nilfs_segctor_thread+0xc4f/0x11e0 fs/nilfs2/segment.c:2610
 kthread+0x3ed/0x550 kernel/kthread.c:388
 ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:243

Uninit was created at:
 __alloc_pages+0x9a6/0xe00 mm/page_alloc.c:4590
 alloc_pages_mpol+0x62b/0x9d0 mm/mempolicy.c:2133
 alloc_pages mm/mempolicy.c:2204 [inline]
 folio_alloc+0x1da/0x380 mm/mempolicy.c:2211
 filemap_alloc_folio+0xa5/0x430 mm/filemap.c:975
 __filemap_get_folio+0x9aa/0x13f0 mm/filemap.c:1919
 pagecache_get_page+0x4a/0x1a0 mm/folio-compat.c:93
 grab_cache_page_write_begin+0x55/0x70 mm/folio-compat.c:103
 block_write_begin+0x4f/0x450 fs/buffer.c:2207
 nilfs_write_begin+0xfc/0x200 fs/nilfs2/inode.c:262
 generic_perform_write+0x3f5/0xc40 mm/filemap.c:3930
 __generic_file_write_iter+0x20a/0x460 mm/filemap.c:4025
 generic_file_write_iter+0x103/0x5b0 mm/filemap.c:4051
 __kernel_write_iter+0x686/0xc30 fs/read_write.c:523
 dump_emit_page fs/coredump.c:888 [inline]
 dump_user_range+0x593/0xcd0 fs/coredump.c:915
 elf_core_dump+0x59ee/0x5c60 fs/binfmt_elf.c:2077
 do_coredump+0x32c9/0x4920 fs/coredump.c:764
 get_signal+0x21fa/0x2d80 kernel/signal.c:2879
 arch_do_signal_or_restart+0x53/0xca0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
 syscall_exit_to_user_mode+0x5c/0x160 kernel/entry/common.c:212
 __do_fast_syscall_32+0xc5/0x110 arch/x86/entry/common.c:324
 do_fast_syscall_32+0x37/0x70 arch/x86/entry/common.c:346
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384
 entry_SYSENTER_compat_after_hwframe+0x70/0x7a

CPU: 1 PID: 5988 Comm: segctord Not tainted 6.8.0-rc6-syzkaller-00037-g805d849d7c3c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
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