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authorEric Sandeen <sandeen@redhat.com>2007-12-22 14:03:24 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-12-23 12:54:36 -0800
commitb88629060b03adc58639f818fe0968bf5fe81b5d (patch)
tree5ee2455acde11f0f229de31a73a4475df3445e82
parented367fc3a7349b17354c7acef551533337764859 (diff)
ecryptfs: fix string overflow on long cipher names
Passing a cipher name > 32 chars on mount results in an overflow when the cipher name is printed, because the last character in the struct ecryptfs_key_tfm's cipher_name string was never zeroed. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Acked-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/ecryptfs/crypto.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index bbed2fd40fdc..67e8b16f7bcb 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -1847,6 +1847,7 @@ ecryptfs_add_new_key_tfm(struct ecryptfs_key_tfm **key_tfm, char *cipher_name,
mutex_init(&tmp_tfm->key_tfm_mutex);
strncpy(tmp_tfm->cipher_name, cipher_name,
ECRYPTFS_MAX_CIPHER_NAME_SIZE);
+ tmp_tfm->cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE] = '\0';
tmp_tfm->key_size = key_size;
rc = ecryptfs_process_key_cipher(&tmp_tfm->key_tfm,
tmp_tfm->cipher_name,