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| author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2019-01-16 19:46:16 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-18 16:14:14 +0300 |
| commit | e25df7812c91f62581301f9a7ac102acf92e4937 (patch) | |
| tree | 6e5615c058f1384c5772c7d5ec2ef194f0764d73 /drivers/misc/ibmvmc.c | |
| parent | 7e7ca7744a539f1a172e3b81c29d000787e3d774 (diff) | |
| download | linux-e25df7812c91f62581301f9a7ac102acf92e4937.tar.xz | |
misc: ibmvsm: Fix potential NULL pointer dereference
There is a potential NULL pointer dereference in case kzalloc()
fails and returns NULL.
Fix this by adding a NULL check on *session*
Also, update the function header with information about the
expected return on failure and remove unnecessary variable rc.
This issue was detected with the help of Coccinelle.
Fixes: 0eca353e7ae7 ("misc: IBM Virtual Management Channel Driver (VMC)")
Cc: stable@vger.kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/ibmvmc.c')
| -rw-r--r-- | drivers/misc/ibmvmc.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/misc/ibmvmc.c b/drivers/misc/ibmvmc.c index b8aaa684c397..2ed23c99f59f 100644 --- a/drivers/misc/ibmvmc.c +++ b/drivers/misc/ibmvmc.c @@ -820,21 +820,24 @@ static int ibmvmc_send_msg(struct crq_server_adapter *adapter, * * Return: * 0 - Success + * Non-zero - Failure */ static int ibmvmc_open(struct inode *inode, struct file *file) { struct ibmvmc_file_session *session; - int rc = 0; pr_debug("%s: inode = 0x%lx, file = 0x%lx, state = 0x%x\n", __func__, (unsigned long)inode, (unsigned long)file, ibmvmc.state); session = kzalloc(sizeof(*session), GFP_KERNEL); + if (!session) + return -ENOMEM; + session->file = file; file->private_data = session; - return rc; + return 0; } /** |