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ANDROID: scsi: Add segment checking in sg_read 

Bug: 65023233
Signed-off-by: Roberto Pereira <rpere@google.com>
Change-Id: Ib45f402cf304f9b8bf18884738f92b9c3db55573
This commit is contained in:
Roberto Pereira 2017-10-10 17:14:48 -07:00 committed by Artem Borisov
parent b7f0468bb9
commit 7b53ae9e92
1 changed files with 3 additions and 0 deletions
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3
drivers/scsi/sg.c
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@ -353,6 +353,9 @@ sg_read(struct file *filp, char __user *buf, size_t count, loff_t * ppos)
struct sg_header *old_hdr = NULL;
int retval = 0;
if (unlikely(segment_eq(get_fs(), KERNEL_DS)))
return -EINVAL;
if ((!(sfp = (Sg_fd *) filp->private_data)) || (!(sdp = sfp->parentdp)))
return -ENXIO;
SCSI_LOG_TIMEOUT(3, printk("sg_read: %s, count=%d\n",