| Message ID | 1379637389-15222-1-git-send-email-kamal@canonical.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index a1dcdc3..bc108d2 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -2421,14 +2421,9 @@ sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) } } - if (modepage == 0x3F) { - sd_printk(KERN_ERR, sdkp, "No Caching mode page " - "present\n"); - goto defaults; - } else if ((buffer[offset] & 0x3f) != modepage) { - sd_printk(KERN_ERR, sdkp, "Got wrong page\n"); - goto defaults; - } + sd_printk(KERN_ERR, sdkp, "No Caching mode page found\n"); + goto defaults; + Page_found: if (modepage == 8) { sdkp->WCE = ((buffer[offset + 2] & 0x04) != 0);
This is a note to let you know that I have just added a patch titled [SCSI] sd: Fix potential out-of-bounds access to the linux-3.8.y-queue branch of the 3.8.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.8.y-queue This patch is scheduled to be released in version 3.8.13.10. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.8.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Kamal ------ From c0536c5524ee2fadafdbbeea6f9e2dc23292f530 Mon Sep 17 00:00:00 2001 From: Alan Stern <stern@rowland.harvard.edu> Date: Fri, 6 Sep 2013 11:49:51 -0400 Subject: [SCSI] sd: Fix potential out-of-bounds access commit 984f1733fcee3fbc78d47e26c5096921c5d9946a upstream. This patch fixes an out-of-bounds error in sd_read_cache_type(), found by Google's AddressSanitizer tool. When the loop ends, we know that "offset" lies beyond the end of the data in the buffer, so no Caching mode page was found. In theory it may be present, but the buffer size is limited to 512 bytes. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Reported-by: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- drivers/scsi/sd.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) -- 1.8.1.2