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_open fs/namei.c:3391 [inline]
 open_last_lookups fs/namei.c:3481 [inline]
 path_openat+0x2709/0x5bc0 fs/namei.c:3711
 do_filp_open+0x309/0x760 fs/namei.c:3741
 do_sys_openat2+0x257/0x8e0 fs/open.c:1310
 do_sys_open fs/open.c:1326 [inline]
 __do_compat_sys_openat fs/open.c:1386 [inline]
 __se_compat_sys_openat fs/open.c:1384 [inline]
 __ia32_compat_sys_openat+0x351/0x3b0 fs/open.c:1384
 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: 1 PID: 10463 Comm: syz-executor.4 Not tainted 6.2.0-rc8-syzkaller-80999-g31b504f219a9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
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