The patch below does not apply to the 6.3-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable@xxxxxxxxxxxxxxx>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.3.y git checkout FETCH_HEAD git cherry-pick -x f5442b35e69e42015ef3082008c0d85cdcc0ca05 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable@xxxxxxxxxxxxxxx>' --in-reply-to '2023051306-elves-dividers-01e7@gregkh' --subject-prefix 'PATCH 6.3.y' HEAD^.. Possible dependencies: f5442b35e69e ("drm/amd/display: fix double memory allocation") b5006f873b99 ("drm/amd/display: initialize link_srv in virtual env") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From f5442b35e69e42015ef3082008c0d85cdcc0ca05 Mon Sep 17 00:00:00 2001 From: Martin Leung <Martin.Leung@xxxxxxx> Date: Tue, 14 Mar 2023 09:27:20 -0400 Subject: [PATCH] drm/amd/display: fix double memory allocation [Why & How] when trying to fix a nullptr dereference on VMs, accidentally doubly allocated memory for the non VM case. removed the extra link_srv creation since dc_construct_ctx is called in both VM and non VM cases Also added a proper fail check for if kzalloc fails Cc: stable@xxxxxxxxxxxxxxx Cc: Mario Limonciello <mario.limonciello@xxxxxxx> Reviewed-by: Leo Ma <Hanghong.Ma@xxxxxxx> Acked-by: Qingqing Zhuo <qingqing.zhuo@xxxxxxx> Signed-off-by: Martin Leung <Martin.Leung@xxxxxxx> Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index 40f2e174c524..52564b93f7eb 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -887,7 +887,10 @@ static bool dc_construct_ctx(struct dc *dc, } dc->ctx = dc_ctx; + dc->link_srv = link_create_link_service(); + if (!dc->link_srv) + return false; return true; } @@ -986,8 +989,6 @@ static bool dc_construct(struct dc *dc, goto fail; } - dc->link_srv = link_create_link_service(); - dc->res_pool = dc_create_resource_pool(dc, init_params, dc_ctx->dce_version); if (!dc->res_pool) goto fail;
