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16b52bbee4
The writable file /sys/power/resume may call vfs lookup helpers for
arbitrary paths and readonly files can be read by overlayfs from vfs
helpers when sysfs is a lower layer of overalyfs.
To avoid a lockdep warning of circular dependency between overlayfs
inode lock and kernfs of->mutex, use a different lockdep class for
writable and readonly kernfs files.
Reported-by: syzbot+9a5b0ced8b1bfb238b56@syzkaller.appspotmail.com
Fixes:
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.. | ||
dir.c | ||
file.c | ||
inode.c | ||
Kconfig | ||
kernfs-internal.h | ||
Makefile | ||
mount.c | ||
symlink.c |