| Message ID | 1445438095-30693-1-git-send-email-luis.henriques@canonical.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/drivers/mtd/ubi/io.c b/drivers/mtd/ubi/io.c index d36134925d31..db657f2168d7 100644 --- a/drivers/mtd/ubi/io.c +++ b/drivers/mtd/ubi/io.c @@ -921,6 +921,11 @@ static int validate_vid_hdr(const struct ubi_device *ubi, goto bad; } + if (data_size > ubi->leb_size) { + ubi_err("bad data_size"); + goto bad; + } + if (vol_type == UBI_VID_STATIC) { /* * Although from high-level point of view static volumes may
This is a note to let you know that I have just added a patch titled UBI: Validate data_size to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree which can be found at: http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.16.y-queue This patch is scheduled to be released in version 3.16.7-ckt19. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.16.y-ckt tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ------ From 80fe92d4075b6b72a371b7bfa4093f2bfa02f321 Mon Sep 17 00:00:00 2001 From: Richard Weinberger <richard@nod.at> Date: Tue, 22 Sep 2015 23:58:07 +0200 Subject: UBI: Validate data_size commit 281fda27673f833a01d516658a64d22a32c8e072 upstream. Make sure that data_size is less than LEB size. Otherwise a handcrafted UBI image is able to trigger an out of bounds memory access in ubi_compare_lebs(). Signed-off-by: Richard Weinberger <richard@nod.at> Reviewed-by: David Gstir <david@sigma-star.at> [ luis: backported to 3.16: - no ubi_device parameter for the ubi_err() macro in 3.16 ] Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- drivers/mtd/ubi/io.c | 5 +++++ 1 file changed, 5 insertions(+)