]> git.baikalelectronics.ru Git - kernel.git/commit
drm/vc4: Fix NULL pointer dereference in vc4_save_hang_state()
authorBoris Brezillon <boris.brezillon@free-electrons.com>
Thu, 18 Jan 2018 14:58:21 +0000 (15:58 +0100)
committerEric Anholt <eric@anholt.net>
Thu, 18 Jan 2018 20:17:03 +0000 (12:17 -0800)
commit5a080b7753a192e2700e2fcb2c9a2ae95ec80469
treea664338716ad69536f4330670b8ffee74e6916e8
parentfc1b1cb22ffd93957fae4f5c89cbe6b15d12a1b7
drm/vc4: Fix NULL pointer dereference in vc4_save_hang_state()

When saving BOs in the hang state we skip one entry of the
kernel_state->bo[] array, thus leaving it to NULL. This leads to a NULL
pointer dereference when, later in this function, we iterate over all
BOs to check their ->madv state.

Fixes: 447903ee0e05 ("drm/vc4: improve throughput by pipelining binning and rendering jobs")
Cc: <stable@vger.kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20180118145821.22344-1-boris.brezillon@free-electrons.com
drivers/gpu/drm/vc4/vc4_gem.c