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authorMichael Halcrow <mhalcrow@us.ibm.com>2008-10-16 05:02:49 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-16 18:21:38 (GMT)
commit7d6c7045581d3736c5f14053eb59342aa0b2cc07 (patch)
tree3906a3e8b0d4a2e4752c4eb19defc62691d200d7 /fs/ecryptfs/file.c
parent9d793b0bcbbbc37d80241862dfa5257963d5415e (diff)
downloadlinux-7d6c7045581d3736c5f14053eb59342aa0b2cc07.tar.xz
eCryptfs: remove retry loop in ecryptfs_readdir()
The retry block in ecryptfs_readdir() has been in the eCryptfs code base for a while, apparently for no good reason. This loop could potentially run without terminating. This patch removes the loop, instead erroring out if vfs_readdir() on the lower file fails. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Reported-by: Al Viro <viro@ZinIV.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ecryptfs/file.c')
-rw-r--r--fs/ecryptfs/file.c17
1 files changed, 8 insertions, 9 deletions
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index 9244d65..eb3dc4c 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -71,12 +71,11 @@ struct ecryptfs_getdents_callback {
void *dirent;
struct dentry *dentry;
filldir_t filldir;
- int err;
int filldir_called;
int entries_written;
};
-/* Inspired by generic filldir in fs/readir.c */
+/* Inspired by generic filldir in fs/readdir.c */
static int
ecryptfs_filldir(void *dirent, const char *name, int namelen, loff_t offset,
u64 ino, unsigned int d_type)
@@ -125,18 +124,18 @@ static int ecryptfs_readdir(struct file *file, void *dirent, filldir_t filldir)
buf.dirent = dirent;
buf.dentry = file->f_path.dentry;
buf.filldir = filldir;
-retry:
buf.filldir_called = 0;
buf.entries_written = 0;
- buf.err = 0;
rc = vfs_readdir(lower_file, ecryptfs_filldir, (void *)&buf);
- if (buf.err)
- rc = buf.err;
- if (buf.filldir_called && !buf.entries_written)
- goto retry;
file->f_pos = lower_file->f_pos;
+ if (rc < 0)
+ goto out;
+ if (buf.filldir_called && !buf.entries_written)
+ goto out;
if (rc >= 0)
- fsstack_copy_attr_atime(inode, lower_file->f_path.dentry->d_inode);
+ fsstack_copy_attr_atime(inode,
+ lower_file->f_path.dentry->d_inode);
+out:
return rc;
}