From 7dde60c06cff611b9f88676ef9e67365dc77b19a Mon Sep 17 00:00:00 2001 From: Colin Ian King Date: Tue, 2 Jan 2018 17:54:19 +0000 Subject: slimbus: avoid null pointer dereference on msg The pointer msg is checked to see if it is null at the start of the function and jumps to the error exit label reterr that then dereferences msg when it prints a dev_err error message. Avoid this potential null pointer dereference by only printing the error message if msg is not null. Detected by CoverityScan, CID#1463141 ("Dereference after null check") Signed-off-by: Colin Ian King Signed-off-by: Srinivas Kandagatla Signed-off-by: Greg Kroah-Hartman --- drivers/slimbus/messaging.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/slimbus/messaging.c b/drivers/slimbus/messaging.c index 755462a..8b2c77f 100644 --- a/drivers/slimbus/messaging.c +++ b/drivers/slimbus/messaging.c @@ -170,8 +170,9 @@ static int slim_val_inf_sanity(struct slim_controller *ctrl, break; } reterr: - dev_err(ctrl->dev, "Sanity check failed:msg:offset:0x%x, mc:%d\n", - msg->start_offset, mc); + if (msg) + dev_err(ctrl->dev, "Sanity check failed:msg:offset:0x%x, mc:%d\n", + msg->start_offset, mc); return -EINVAL; } -- cgit v1.1