loop4: detected capacity change from 0 to 16
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BUG: KMSAN: uninit-value in ondemand_readahead+0xddf/0x1a10 mm/readahead.c:596
 ondemand_readahead+0xddf/0x1a10 mm/readahead.c:596
 page_cache_sync_ra+0x899/0x8d0 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+0x76d/0x1530 fs/cramfs/inode.c:278
 cramfs_lookup+0x247/0x9e0 fs/cramfs/inode.c:767
 __lookup_hash+0x2b5/0x590 fs/namei.c:1601
 filename_create+0x441/0x8f0 fs/namei.c:3808
 do_mkdirat+0xf7/0x8a0 fs/namei.c:4051
 __do_sys_mkdirat fs/namei.c:4076 [inline]
 __se_sys_mkdirat fs/namei.c:4074 [inline]
 __ia32_sys_mkdirat+0x11e/0x170 fs/namei.c:4074
 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+0x10a/0x1530 fs/cramfs/inode.c:278
 cramfs_lookup+0x247/0x9e0 fs/cramfs/inode.c:767

CPU: 0 PID: 5308 Comm: syz-executor.4 Not tainted 6.2.0-rc8-syzkaller-80998-g9c866a280876 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
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