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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2017-06-15 17:54:51 +0900 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-06-15 17:54:51 +0900 |
| commit | 54ed0f71f0a0cbf3218e2503a50364f178b1e855 (patch) | |
| tree | 6bb2b4a205bbc208311fbf46e9ed02eb05357a17 /lib | |
| parent | Merge tag 'acpi-4.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm (diff) | |
| parent | crypto: Work around deallocated stack frame reference gcc bug on sparc. (diff) | |
| download | wireguard-linux-54ed0f71f0a0cbf3218e2503a50364f178b1e855.tar.xz wireguard-linux-54ed0f71f0a0cbf3218e2503a50364f178b1e855.zip | |
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fix from Herbert Xu:
"This fixes a bug on sparc where we may dereference freed stack memory"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: Work around deallocated stack frame reference gcc bug on sparc.
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/libcrc32c.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/libcrc32c.c b/lib/libcrc32c.c index 74a54b7f2562..9f79547d1b97 100644 --- a/lib/libcrc32c.c +++ b/lib/libcrc32c.c @@ -43,7 +43,7 @@ static struct crypto_shash *tfm; u32 crc32c(u32 crc, const void *address, unsigned int length) { SHASH_DESC_ON_STACK(shash, tfm); - u32 *ctx = (u32 *)shash_desc_ctx(shash); + u32 ret, *ctx = (u32 *)shash_desc_ctx(shash); int err; shash->tfm = tfm; @@ -53,7 +53,9 @@ u32 crc32c(u32 crc, const void *address, unsigned int length) err = crypto_shash_update(shash, address, length); BUG_ON(err); - return *ctx; + ret = *ctx; + barrier_data(ctx); + return ret; } EXPORT_SYMBOL(crc32c); |