[SCSI] gdth: Allocate sense_buffer to prevent NULL pointer dereference
Fix NULL pointer dereference during execution of Internal commands,
where gdth only allocates scp, but not scp->sense_buffer. The rest of
the code assumes that sense_buffer is allocated, which leads to a kernel
oops e.g. on reboot (during cache flush).
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/gdth.c b/drivers/scsi/gdth.c
index 27ebd33..0b2080d 100644
--- a/drivers/scsi/gdth.c
+++ b/drivers/scsi/gdth.c
@@ -493,6 +493,12 @@
if (!scp)
return -ENOMEM;
+ scp->sense_buffer = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_KERNEL);
+ if (!scp->sense_buffer) {
+ kfree(scp);
+ return -ENOMEM;
+ }
+
scp->device = sdev;
memset(&cmndinfo, 0, sizeof(cmndinfo));
@@ -513,6 +519,7 @@
rval = cmndinfo.status;
if (info)
*info = cmndinfo.info;
+ kfree(scp->sense_buffer);
kfree(scp);
return rval;
}