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[16/24] ubifs: Make r5 hash binary string aware

Message ID 1480627271-10441-17-git-send-email-richard@nod.at
State Accepted
Delegated to: Richard Weinberger
Headers show

Commit Message

Richard Weinberger Dec. 1, 2016, 9:21 p.m. UTC 
As of now all filenames known by UBIFS are strings with a NUL
terminator. With encrypted filenames a filename can be any binary
string and the r5 function cannot search for the NUL terminator.
UBIFS always knows how long a filename is, therefore we can change
the hash function to iterate over the filename length to work
correctly with binary strings.

Signed-off-by: Richard Weinberger <richard@nod.at>
---
 fs/ubifs/key.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/fs/ubifs/key.h b/fs/ubifs/key.h
index c0a95e393347..ca4371fdfa7d 100644
--- a/fs/ubifs/key.h
+++ b/fs/ubifs/key.h
@@ -69,7 +69,7 @@  static inline uint32_t key_r5_hash(const char *s, int len)
 	uint32_t a = 0;
 	const signed char *str = (const signed char *)s;
 
-	while (*str) {
+	while (len--) {
 		a += *str << 4;
 		a += *str >> 4;
 		a *= 11;