| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.4 115/135] ecryptfs: replace BUG_ON with error handling code | Date | Thu, 27 Feb 2020 14:37:35 +0100 |
| |
From: Aditya Pakki <pakki001@umn.edu>
commit 2c2a7552dd6465e8fde6bc9cccf8d66ed1c1eb72 upstream.
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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- fs/ecryptfs/crypto.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
--- a/fs/ecryptfs/crypto.c +++ b/fs/ecryptfs/crypto.c @@ -311,8 +311,10 @@ static int crypt_scatterlist(struct ecry 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);
|