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remoteproc: imx_rproc: Skip over memory region when node value is NULL 

ANBZ: #12926

commit 2fa26ca8b7 upstream.

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: a0ff4aa6f0 ("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>
Fixes: CVE-2024-43860
Signed-off-by: Guanghui Feng <guanghuifeng@linux.alibaba.com>
Reviewed-by: Guixin Liu <kanie@linux.alibaba.com>
Link: https://gitee.com/anolis/cloud-kernel/pulls/4976
This commit is contained in:
Aleksandr Mishin 2024-06-06 10:52:04 +03:00 committed by 小龙
parent 7df5dd5eac
commit dfa30b1558
1 changed files with 2 additions and 0 deletions
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2
drivers/remoteproc/imx_rproc.c
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@ -287,6 +287,8 @@ static int imx_rproc_addr_init(struct imx_rproc *priv,
struct resource res;
node = of_parse_phandle(np, "memory-region", a);
if (!node)
continue;
err = of_address_to_resource(node, 0, &res);
if (err) {
dev_err(dev, "unable to resolve memory region\n");