From 17f386e6b7695afdb10474431dfd754c92feaedd Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Wed, 11 Nov 2020 17:22:32 +0100 Subject: [PATCH] fuse: always revalidate if exclusive create commit df8629af293493757beccac2d3168fe5a315636e upstream. Failure to do so may result in EEXIST even if the file only exists in the cache and not in the filesystem. The atomic nature of O_EXCL mandates that the cached state should be ignored and existence verified anew. Reported-by: Ken Schalk Signed-off-by: Miklos Szeredi Signed-off-by: Wu Bo Signed-off-by: Greg Kroah-Hartman --- fs/fuse/dir.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 8e95a75a4559c..80a9e50392a09 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -205,7 +205,7 @@ static int fuse_dentry_revalidate(struct dentry *entry, unsigned int flags) if (inode && fuse_is_bad(inode)) goto invalid; else if (time_before64(fuse_dentry_time(entry), get_jiffies_64()) || - (flags & LOOKUP_REVAL)) { + (flags & (LOOKUP_EXCL | LOOKUP_REVAL))) { struct fuse_entry_out outarg; FUSE_ARGS(args); struct fuse_forget_link *forget; -- 2.47.3