loop4: detected capacity change from 0 to 8
=====================================================
BUG: KMSAN: uninit-value in ondemand_readahead+0xddf/0x1720 mm/readahead.c:596
 ondemand_readahead+0xddf/0x1720 mm/readahead.c:596
 page_cache_sync_ra+0x72b/0x760 mm/readahead.c:709
 page_cache_sync_readahead include/linux/pagemap.h:1210 [inline]
 cramfs_blkdev_read fs/cramfs/inode.c:217 [inline]
 cramfs_read+0x611/0x1280 fs/cramfs/inode.c:278
 cramfs_lookup+0x1b8/0x870 fs/cramfs/inode.c:767
 __lookup_slow+0x528/0x730 fs/namei.c:1685
 lookup_slow+0x6a/0xc0 fs/namei.c:1702
 walk_component+0x462/0x650 fs/namei.c:1993
 lookup_last fs/namei.c:2450 [inline]
 path_lookupat+0x27d/0x6f0 fs/namei.c:2474
 filename_lookup+0x250/0x800 fs/namei.c:2503
 vfs_statx+0xf2/0x690 fs/stat.c:232
 do_statx fs/stat.c:646 [inline]
 __do_sys_statx fs/stat.c:673 [inline]
 __se_sys_statx fs/stat.c:664 [inline]
 __ia32_sys_statx+0x34c/0x4c0 fs/stat.c:664
 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

Local variable ra.i created at:
 cramfs_blkdev_read fs/cramfs/inode.c:186 [inline]
 cramfs_read+0xc0/0x1280 fs/cramfs/inode.c:278
 cramfs_lookup+0x1b8/0x870 fs/cramfs/inode.c:767

CPU: 1 PID: 17398 Comm: syz-executor.4 Not tainted 6.2.0-syzkaller-81152-g97e36f4aa06f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
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