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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-06-15 11:54:51 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-06-15 11:54:51 +0300 |
| commit | 54ed0f71f0a0cbf3218e2503a50364f178b1e855 (patch) | |
| tree | 6bb2b4a205bbc208311fbf46e9ed02eb05357a17 | |
| parent | 35e60a6b7577218ac7eb7777c8849822a080e127 (diff) | |
| parent | d41519a69b35b10af7fda867fb9100df24fdf403 (diff) | |
| download | linux-54ed0f71f0a0cbf3218e2503a50364f178b1e855.tar.xz | |
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.
| -rw-r--r-- | drivers/infiniband/sw/rxe/rxe.h | 5 | ||||
| -rw-r--r-- | fs/btrfs/hash.c | 5 | ||||
| -rw-r--r-- | fs/f2fs/f2fs.h | 5 | ||||
| -rw-r--r-- | lib/libcrc32c.c | 6 |
4 files changed, 16 insertions, 5 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe.h b/drivers/infiniband/sw/rxe/rxe.h index ecdba2fce083..1ac5b8551a4d 100644 --- a/drivers/infiniband/sw/rxe/rxe.h +++ b/drivers/infiniband/sw/rxe/rxe.h @@ -68,6 +68,7 @@ static inline u32 rxe_crc32(struct rxe_dev *rxe, u32 crc, void *next, size_t len) { + u32 retval; int err; SHASH_DESC_ON_STACK(shash, rxe->tfm); @@ -81,7 +82,9 @@ static inline u32 rxe_crc32(struct rxe_dev *rxe, return crc32_le(crc, next, len); } - return *(u32 *)shash_desc_ctx(shash); + retval = *(u32 *)shash_desc_ctx(shash); + barrier_data(shash_desc_ctx(shash)); + return retval; } int rxe_set_mtu(struct rxe_dev *rxe, unsigned int dev_mtu); diff --git a/fs/btrfs/hash.c b/fs/btrfs/hash.c index a97fdc156a03..baacc1866861 100644 --- a/fs/btrfs/hash.c +++ b/fs/btrfs/hash.c @@ -38,6 +38,7 @@ u32 btrfs_crc32c(u32 crc, const void *address, unsigned int length) { SHASH_DESC_ON_STACK(shash, tfm); u32 *ctx = (u32 *)shash_desc_ctx(shash); + u32 retval; int err; shash->tfm = tfm; @@ -47,5 +48,7 @@ u32 btrfs_crc32c(u32 crc, const void *address, unsigned int length) err = crypto_shash_update(shash, address, length); BUG_ON(err); - return *ctx; + retval = *ctx; + barrier_data(ctx); + return retval; } diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 2185c7a040a1..fd2e651bad6d 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -1078,6 +1078,7 @@ static inline u32 f2fs_crc32(struct f2fs_sb_info *sbi, const void *address, { SHASH_DESC_ON_STACK(shash, sbi->s_chksum_driver); u32 *ctx = (u32 *)shash_desc_ctx(shash); + u32 retval; int err; shash->tfm = sbi->s_chksum_driver; @@ -1087,7 +1088,9 @@ static inline u32 f2fs_crc32(struct f2fs_sb_info *sbi, const void *address, err = crypto_shash_update(shash, address, length); BUG_ON(err); - return *ctx; + retval = *ctx; + barrier_data(ctx); + return retval; } static inline bool f2fs_crc_valid(struct f2fs_sb_info *sbi, __u32 blk_crc, 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); |