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Message-Id: <20200227132251.383291850@linuxfoundation.org>
Date: Thu, 27 Feb 2020 14:37:44 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Aditya Pakki <pakki001@....edu>,
Tyler Hicks <code@...icks.com>
Subject: [PATCH 5.5 127/150] ecryptfs: replace BUG_ON with error handling code
From: Aditya Pakki <pakki001@....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@....edu>
Signed-off-by: Tyler Hicks <code@...icks.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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);
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