From: Thelford Williams Date: Wed, 13 Oct 2021 20:04:13 +0000 (-0400) Subject: drm/amdgpu: fix out of bounds write X-Git-Tag: accepted/tizen/unified/20230118.172025~6114^2~5^2~7 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5afa7898ab7a0ec9c28556a91df714bf3c2f725e;p=platform%2Fkernel%2Flinux-rpi.git drm/amdgpu: fix out of bounds write Size can be any value and is user controlled resulting in overwriting the 40 byte array wr_buf with an arbitrary length of data from buf. Signed-off-by: Thelford Williams Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org --- diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c index 87daa78..17f2756 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c @@ -263,7 +263,7 @@ static ssize_t dp_link_settings_write(struct file *f, const char __user *buf, if (!wr_buf) return -ENOSPC; - if (parse_write_buffer_into_params(wr_buf, size, + if (parse_write_buffer_into_params(wr_buf, wr_buf_size, (long *)param, buf, max_param_num, ¶m_nums)) {