tree 91377a7cc8b1b8892d7084aab2190a0f86b4696e
parent bb2b54f19e202d5781ec6c05b3d584fcd85cddcc
author Tadeusz Struk <tadeusz.struk@linaro.org> 1665012570 -0700
committer Pierre-Clément Tosi <ptosi@google.com> 1697045598 +0100

FROMGIT: libfdt: prevent integer overflow in fdt_next_tag

Since fdt_next_tag() in a public API function all input parameters,
including the fdt blob should not be trusted. It is possible to forge
a blob with invalid property length that will cause integer overflow
during offset calculation. To prevent that, validate the property length
read from the blob before doing calculations.

Signed-off-by: Tadeusz Struk <tadeusz.struk@linaro.org>
Message-Id: <20221005232931.3016047-1-tadeusz.struk@linaro.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

(cherry-picked from commit 73590342fc85ca207ca1e6cbc110179873a96962 git://git.kernel.org/pub/scm/utils/dtc/dtc.git main)

Test: N/A
Change-Id: I894051ed101255800717001a71a5a74ac66fd897