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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2018-09-30 21:51:16 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2018-10-05 10:22:48 +0800
commitfd27b571c9f6cf95ddbdf9de7cf0aa8c8cfe8066 (patch)
tree60a94e9e832692d11c9af702429dc1cdd2395691 /crypto/lrw.c
parent5155e118dda982342c2d21ecb292c8cc8b566e8d (diff)
downloadlinux-fd27b571c9f6cf95ddbdf9de7cf0aa8c8cfe8066.tar.bz2
crypto: lrw - fix rebase error after out of bounds fix
Due to an unfortunate interaction between commit fbe1a850b3b1 ("crypto: lrw - Fix out-of bounds access on counter overflow") and commit c778f96bf347 ("crypto: lrw - Optimize tweak computation"), we ended up with a version of next_index() that always returns 127. Fixes: c778f96bf347 ("crypto: lrw - Optimize tweak computation") Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/lrw.c')
-rw-r--r--crypto/lrw.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/crypto/lrw.c b/crypto/lrw.c
index 6fcf0d431185..0430ccd08728 100644
--- a/crypto/lrw.c
+++ b/crypto/lrw.c
@@ -122,10 +122,9 @@ static int next_index(u32 *counter)
int i, res = 0;
for (i = 0; i < 4; i++) {
- if (counter[i] + 1 != 0) {
- res += ffz(counter[i]++);
- break;
- }
+ if (counter[i] + 1 != 0)
+ return res + ffz(counter[i]++);
+
counter[i] = 0;
res += 32;
}