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| author | Aditya Pakki <pakki001@umn.edu> | 2020-02-14 12:21:01 -0600 |
|---|---|---|
| committer | Tyler Hicks <code@tyhicks.com> | 2020-02-14 20:07:46 +0000 |
| commit | 2c2a7552dd6465e8fde6bc9cccf8d66ed1c1eb72 (patch) | |
| tree | 5ce545b447440ebe23331c9abd06c304631a4a4e /fs/ecryptfs | |
| parent | f8e48a8408f5e23dd514916fda128a87e34f8ffd (diff) | |
| download | lwn-2c2a7552dd6465e8fde6bc9cccf8d66ed1c1eb72.tar.gz lwn-2c2a7552dd6465e8fde6bc9cccf8d66ed1c1eb72.zip | |
ecryptfs: replace BUG_ON with error handling code
In crypt_scatterlist, if the crypt_stat argument is not set up
correctly, the kernel crashes. Instead, by returning an error code
upstream, the error is handled safely.
The issue is detected via a static analysis tool written by us.
Fixes: 237fead619984 (ecryptfs: fs/Makefile and fs/Kconfig)
Signed-off-by: Aditya Pakki <pakki001@umn.edu>
Signed-off-by: Tyler Hicks <code@tyhicks.com>
Diffstat (limited to 'fs/ecryptfs')
| -rw-r--r-- | fs/ecryptfs/crypto.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c index f91db24bbf3b..a064b408d841 100644 --- a/fs/ecryptfs/crypto.c +++ b/fs/ecryptfs/crypto.c @@ -311,8 +311,10 @@ static int crypt_scatterlist(struct ecryptfs_crypt_stat *crypt_stat, struct extent_crypt_result ecr; int rc = 0; - BUG_ON(!crypt_stat || !crypt_stat->tfm - || !(crypt_stat->flags & ECRYPTFS_STRUCT_INITIALIZED)); + if (!crypt_stat || !crypt_stat->tfm + || !(crypt_stat->flags & ECRYPTFS_STRUCT_INITIALIZED)) + return -EINVAL; + if (unlikely(ecryptfs_verbosity > 0)) { ecryptfs_printk(KERN_DEBUG, "Key size [%zd]; key:\n", crypt_stat->key_size); |