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Groups > linux.kernel > #1403544
| From | Jiri Slaby <jslaby@suse.cz> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 3.12 53/76] crypto: hash - Fix page length clamping in hash walk |
| Date | 2016-05-19 11:20 +0200 |
| Message-ID | <rAshA-6ee-33@gated-at.bofh.it> (permalink) |
| References | <rAs7T-6aN-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: Herbert Xu <herbert@gondor.apana.org.au> 3.12-stable review patch. If anyone has any objections, please let me know. =============== commit 13f4bb78cf6a312bbdec367ba3da044b09bf0e29 upstream. The crypto hash walk code is broken when supplied with an offset greater than or equal to PAGE_SIZE. This patch fixes it by adjusting walk->pg and walk->offset when this happens. Reported-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Jiri Slaby <jslaby@suse.cz> --- crypto/ahash.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/crypto/ahash.c b/crypto/ahash.c index b246858ca032..781a8a73a7ff 100644 --- a/crypto/ahash.c +++ b/crypto/ahash.c @@ -64,8 +64,9 @@ static int hash_walk_new_entry(struct crypto_hash_walk *walk) struct scatterlist *sg; sg = walk->sg; - walk->pg = sg_page(sg); walk->offset = sg->offset; + walk->pg = sg_page(walk->sg) + (walk->offset >> PAGE_SHIFT); + walk->offset = offset_in_page(walk->offset); walk->entrylen = sg->length; if (walk->entrylen > walk->total) -- 2.8.2
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[PATCH 3.12 53/76] crypto: hash - Fix page length clamping in hash walk Jiri Slaby <jslaby@suse.cz> - 2016-05-19 11:20 +0200
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