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[PATCH] Fix do_path_lookup() to add the check for error in link_path_walk()

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Fix do_path_lookup() to avoid accessing invalid dentry or inode when the
link_path_walk() has failed.  This should fix Bugme #5897.

Signed-off-by: Suzuki K P <suzuki@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Suzuki 2006-02-07 12:58:36 -08:00 committed by Linus Torvalds
parent c00a76aea3
commit 3bc8414b07
1 changed files with 4 additions and 2 deletions
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6
fs/namei.c
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@ -1119,9 +1119,11 @@ static int fastcall do_path_lookup(int dfd, const char *name,
current->total_link_count = 0;
retval = link_path_walk(name, nd);
out:
if (unlikely(current->audit_context
&& nd && nd->dentry && nd->dentry->d_inode))
if (likely(retval == 0)) {
if (unlikely(current->audit_context && nd && nd->dentry &&
nd->dentry->d_inode))
audit_inode(name, nd->dentry->d_inode, flags);
}
return retval;
fput_unlock_fail: