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authorTheodore Ts'o <tytso@mit.edu>2011-06-06 19:19:40 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2011-06-07 08:51:14 -0400
commite6bc45d65df8599fdbae73be9cec4ceed274db53 (patch)
tree2a9a5a0c0835b431d605332ebbfa6dad66e069f0 /fs/namei.c
parent9054760ff585a7fa436599990b63a585ae89ff4d (diff)
downloadlinux-e6bc45d65df8599fdbae73be9cec4ceed274db53.tar.bz2
vfs: make unlink() and rmdir() return ENOENT in preference to EROFS
If user space attempts to remove a non-existent file or directory, and the file system is mounted read-only, return ENOENT instead of EROFS. Either error code is arguably valid/correct, but ENOENT is a more specific error message. Reported-by: Michael Tokarev <mjt@tls.msk.ru> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namei.c')
-rw-r--r--fs/namei.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/fs/namei.c b/fs/namei.c
index e2e4e8d032ee..9802345df5e7 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2624,6 +2624,10 @@ static long do_rmdir(int dfd, const char __user *pathname)
error = PTR_ERR(dentry);
if (IS_ERR(dentry))
goto exit2;
+ if (!dentry->d_inode) {
+ error = -ENOENT;
+ goto exit3;
+ }
error = mnt_want_write(nd.path.mnt);
if (error)
goto exit3;
@@ -2709,11 +2713,10 @@ static long do_unlinkat(int dfd, const char __user *pathname)
error = PTR_ERR(dentry);
if (!IS_ERR(dentry)) {
/* Why not before? Because we want correct error value */
- if (nd.last.name[nd.last.len])
- goto slashes;
inode = dentry->d_inode;
- if (inode)
- ihold(inode);
+ if (nd.last.name[nd.last.len] || !inode)
+ goto slashes;
+ ihold(inode);
error = mnt_want_write(nd.path.mnt);
if (error)
goto exit2;