diff options
Diffstat (limited to 'recipes-kernel/linux/files/CVE-2016-6480.patch')
-rw-r--r-- | recipes-kernel/linux/files/CVE-2016-6480.patch | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/recipes-kernel/linux/files/CVE-2016-6480.patch b/recipes-kernel/linux/files/CVE-2016-6480.patch new file mode 100644 index 0000000..2cd521a --- /dev/null +++ b/recipes-kernel/linux/files/CVE-2016-6480.patch | |||
@@ -0,0 +1,71 @@ | |||
1 | From e4878ef66e5b8d01d6734b1952f9abb3eeea454c Mon Sep 17 00:00:00 2001 | ||
2 | From: Dave Carroll <david.carroll@microsemi.com> | ||
3 | Date: Fri, 5 Aug 2016 13:44:10 -0600 | ||
4 | Subject: aacraid: Check size values after double-fetch from user | ||
5 | |||
6 | commit fa00c437eef8dc2e7b25f8cd868cfa405fcc2bb3 upstream. | ||
7 | |||
8 | In aacraid's ioctl_send_fib() we do two fetches from userspace, one the | ||
9 | get the fib header's size and one for the fib itself. Later we use the | ||
10 | size field from the second fetch to further process the fib. If for some | ||
11 | reason the size from the second fetch is different than from the first | ||
12 | fix, we may encounter an out-of- bounds access in aac_fib_send(). We | ||
13 | also check the sender size to insure it is not out of bounds. This was | ||
14 | reported in https://bugzilla.kernel.org/show_bug.cgi?id=116751 and was | ||
15 | assigned CVE-2016-6480. | ||
16 | |||
17 | CVE: CVE-2016-6480 | ||
18 | Upstream-Status: Backport | ||
19 | |||
20 | Reported-by: Pengfei Wang <wpengfeinudt@gmail.com> | ||
21 | Fixes: 7c00ffa31 '[SCSI] 2.6 aacraid: Variable FIB size (updated patch)' | ||
22 | Signed-off-by: Dave Carroll <david.carroll@microsemi.com> | ||
23 | Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> | ||
24 | Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> | ||
25 | Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> | ||
26 | Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com> | ||
27 | --- | ||
28 | drivers/scsi/aacraid/commctrl.c | 13 +++++++++++-- | ||
29 | 1 file changed, 11 insertions(+), 2 deletions(-) | ||
30 | |||
31 | diff --git a/drivers/scsi/aacraid/commctrl.c b/drivers/scsi/aacraid/commctrl.c | ||
32 | index 54195a1..f78cc94 100644 | ||
33 | --- a/drivers/scsi/aacraid/commctrl.c | ||
34 | +++ b/drivers/scsi/aacraid/commctrl.c | ||
35 | @@ -63,7 +63,7 @@ static int ioctl_send_fib(struct aac_dev * dev, void __user *arg) | ||
36 | struct fib *fibptr; | ||
37 | struct hw_fib * hw_fib = (struct hw_fib *)0; | ||
38 | dma_addr_t hw_fib_pa = (dma_addr_t)0LL; | ||
39 | - unsigned size; | ||
40 | + unsigned int size, osize; | ||
41 | int retval; | ||
42 | |||
43 | if (dev->in_reset) { | ||
44 | @@ -87,7 +87,8 @@ static int ioctl_send_fib(struct aac_dev * dev, void __user *arg) | ||
45 | * will not overrun the buffer when we copy the memory. Return | ||
46 | * an error if we would. | ||
47 | */ | ||
48 | - size = le16_to_cpu(kfib->header.Size) + sizeof(struct aac_fibhdr); | ||
49 | + osize = size = le16_to_cpu(kfib->header.Size) + | ||
50 | + sizeof(struct aac_fibhdr); | ||
51 | if (size < le16_to_cpu(kfib->header.SenderSize)) | ||
52 | size = le16_to_cpu(kfib->header.SenderSize); | ||
53 | if (size > dev->max_fib_size) { | ||
54 | @@ -118,6 +119,14 @@ static int ioctl_send_fib(struct aac_dev * dev, void __user *arg) | ||
55 | goto cleanup; | ||
56 | } | ||
57 | |||
58 | + /* Sanity check the second copy */ | ||
59 | + if ((osize != le16_to_cpu(kfib->header.Size) + | ||
60 | + sizeof(struct aac_fibhdr)) | ||
61 | + || (size < le16_to_cpu(kfib->header.SenderSize))) { | ||
62 | + retval = -EINVAL; | ||
63 | + goto cleanup; | ||
64 | + } | ||
65 | + | ||
66 | if (kfib->header.Command == cpu_to_le16(TakeABreakPt)) { | ||
67 | aac_adapter_interrupt(dev); | ||
68 | /* | ||
69 | -- | ||
70 | cgit v0.12 | ||
71 | |||