The patch below does not apply to the 5.4-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@vger.kernel.org.
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-5.4.y git checkout FETCH_HEAD git cherry-pick -x 2fa26ca8b786888673689ccc9da6094150939982 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2024073033-santa-unscrew-ac70@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^..
Possible dependencies:
2fa26ca8b786 ("remoteproc: imx_rproc: Skip over memory region when node value is NULL") afe670e23af9 ("remoteproc: imx_rproc: Fix ignoring mapping vdev regions") 8f2d8961640f ("remoteproc: imx_rproc: ignore mapping vdev regions")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 2fa26ca8b786888673689ccc9da6094150939982 Mon Sep 17 00:00:00 2001 From: Aleksandr Mishin amishin@t-argos.ru Date: Thu, 6 Jun 2024 10:52:04 +0300 Subject: [PATCH] remoteproc: imx_rproc: Skip over memory region when node value is NULL
In imx_rproc_addr_init() "nph = of_count_phandle_with_args()" just counts number of phandles. But phandles may be empty. So of_parse_phandle() in the parsing loop (0 < a < nph) may return NULL which is later dereferenced. Adjust this issue by adding NULL-return check.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: a0ff4aa6f010 ("remoteproc: imx_rproc: add a NXP/Freescale imx_rproc driver") Signed-off-by: Aleksandr Mishin amishin@t-argos.ru Reviewed-by: Peng Fan peng.fan@nxp.com Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20240606075204.12354-1-amishin@t-argos.ru [Fixed title to fit within the prescribed 70-75 charcters] Signed-off-by: Mathieu Poirier mathieu.poirier@linaro.org
diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c index 5a3fb902acc9..39eacd90af14 100644 --- a/drivers/remoteproc/imx_rproc.c +++ b/drivers/remoteproc/imx_rproc.c @@ -726,6 +726,8 @@ static int imx_rproc_addr_init(struct imx_rproc *priv, struct resource res;
node = of_parse_phandle(np, "memory-region", a); + if (!node) + continue; /* Not map vdevbuffer, vdevring region */ if (!strncmp(node->name, "vdev", strlen("vdev"))) { of_node_put(node);