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| author | Jan Kara <jack@suse.cz> | 2010-05-13 12:52:57 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-13 08:46:04 -0700 |
| commit | 002baeecf53677d2034113e34197ec221f42e037 (patch) | |
| tree | 081c54c4a9a266a894a00165e97dabfb212a2470 /fs/namei.c | |
| parent | fc8e38f142dd59f81306ff6a81c1351e9eb0e014 (diff) | |
| download | linux-002baeecf53677d2034113e34197ec221f42e037.tar.gz linux-002baeecf53677d2034113e34197ec221f42e037.tar.bz2 linux-002baeecf53677d2034113e34197ec221f42e037.zip | |
vfs: Fix O_NOFOLLOW behavior for paths with trailing slashes
According to specification
mkdir d; ln -s d a; open("a/", O_NOFOLLOW | O_RDONLY)
should return success but currently it returns ELOOP. This is a
regression caused by path lookup cleanup patch series.
Fix the code to ignore O_NOFOLLOW in case the provided path has trailing
slashes.
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Reported-by: Marius Tolzmann <tolzmann@molgen.mpg.de>
Acked-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/namei.c')
| -rw-r--r-- | fs/namei.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/namei.c b/fs/namei.c index a7dce91a7e42..16df7277a92e 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -1641,7 +1641,7 @@ static struct file *do_last(struct nameidata *nd, struct path *path, if (nd->last.name[nd->last.len]) { if (open_flag & O_CREAT) goto exit; - nd->flags |= LOOKUP_DIRECTORY; + nd->flags |= LOOKUP_DIRECTORY | LOOKUP_FOLLOW; } /* just plain open? */ @@ -1830,6 +1830,8 @@ reval: } if (open_flag & O_DIRECTORY) nd.flags |= LOOKUP_DIRECTORY; + if (!(open_flag & O_NOFOLLOW)) + nd.flags |= LOOKUP_FOLLOW; filp = do_last(&nd, &path, open_flag, acc_mode, mode, pathname); while (unlikely(!filp)) { /* trailing symlink */ struct path holder; @@ -1837,7 +1839,7 @@ reval: void *cookie; error = -ELOOP; /* S_ISDIR part is a temporary automount kludge */ - if ((open_flag & O_NOFOLLOW) && !S_ISDIR(inode->i_mode)) + if (!(nd.flags & LOOKUP_FOLLOW) && !S_ISDIR(inode->i_mode)) goto exit_dput; if (count++ == 32) goto exit_dput; |