lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Sun, 15 Nov 2015 01:45:45 +0000 From: Ben Hutchings <ben@...adent.org.uk> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org CC: akpm@...ux-foundation.org, "Richard Weinberger" <richard@....at>, "David Gstir" <david@...ma-star.at> Subject: [PATCH 3.2 08/60] UBI: Validate data_size 3.2.73-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Richard Weinberger <richard@....at> 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@....at> Reviewed-by: David Gstir <david@...ma-star.at> [bwh: Backported to 3.2: drop first argument to ubi_err()] Signed-off-by: Ben Hutchings <ben@...adent.org.uk> --- drivers/mtd/ubi/io.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/mtd/ubi/io.c +++ b/drivers/mtd/ubi/io.c @@ -943,6 +943,11 @@ static int validate_vid_hdr(const struct 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists