From cfde4697ea4d66c7bfb1599eef189211471b2c38 Mon Sep 17 00:00:00 2001 From: Aditya Pakki Date: Fri, 14 Feb 2020 12:21:01 -0600 Subject: [PATCH] ecryptfs: replace BUG_ON with error handling code 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 Signed-off-by: Tyler Hicks Signed-off-by: Greg Kroah-Hartman --- fs/ecryptfs/crypto.c | 6 ++++-- 1 file 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);