vfs: introduce helper function to safely NUL-terminate symlinks
A number of filesystems were potentially triggering kernel bugs due to corrupted symlink names on disk. This function helps safely terminate the names. Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Duane Griffin <duaneg@dghda.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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@ -94,4 +94,9 @@ static inline char *nd_get_link(struct nameidata *nd)
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return nd->saved_names[nd->depth];
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return nd->saved_names[nd->depth];
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}
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}
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static inline void nd_terminate_link(void *name, size_t len, size_t maxlen)
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{
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((char *) name)[min(len, maxlen)] = '\0';
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}
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#endif /* _LINUX_NAMEI_H */
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#endif /* _LINUX_NAMEI_H */
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