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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2016-04-16 15:01:09 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2016-04-20 17:50:01 +0800 |
| commit | e81f3340bba2bdcdf021aff511830e718e6e2112 (patch) | |
| tree | 2fce034abb35b8caed6170cb9ebad27cc813f95f /fs/ecryptfs/ecryptfs_kernel.h | |
| parent | b3ab30a7cbdaf7ba20dddeac252cc0238312fff0 (diff) | |
| download | linux-e81f3340bba2bdcdf021aff511830e718e6e2112.tar.gz | |
eCryptfs: Do not allocate hash tfm in NORECLAIM context
You cannot allocate crypto tfm objects in NORECLAIM or NOFS contexts.
The ecryptfs code currently does exactly that for the MD5 tfm.
This patch fixes it by preallocating the MD5 tfm in a safe context.
The MD5 tfm is also reentrant so this patch removes the superfluous
cs_hash_tfm_mutex.
Reported-by: Nicolas Boichat <drinkcat@chromium.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'fs/ecryptfs/ecryptfs_kernel.h')
| -rw-r--r-- | fs/ecryptfs/ecryptfs_kernel.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h index d123fbaa28e00..c7761a91cc2ca 100644 --- a/fs/ecryptfs/ecryptfs_kernel.h +++ b/fs/ecryptfs/ecryptfs_kernel.h @@ -242,7 +242,6 @@ struct ecryptfs_crypt_stat { struct list_head keysig_list; struct mutex keysig_list_mutex; struct mutex cs_tfm_mutex; - struct mutex cs_hash_tfm_mutex; struct mutex cs_mutex; }; @@ -577,7 +576,7 @@ int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg, int sg_size); int ecryptfs_compute_root_iv(struct ecryptfs_crypt_stat *crypt_stat); void ecryptfs_rotate_iv(unsigned char *iv); -void ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); +int ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); void ecryptfs_destroy_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); void ecryptfs_destroy_mount_crypt_stat( struct ecryptfs_mount_crypt_stat *mount_crypt_stat); |