5.15-stable review patch. If anyone has any objections, please let me know.
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From: Aleksandr Mishin amishin@t-argos.ru
commit 2fa26ca8b786888673689ccc9da6094150939982 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: 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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/remoteproc/imx_rproc.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/remoteproc/imx_rproc.c +++ b/drivers/remoteproc/imx_rproc.c @@ -588,6 +588,8 @@ static int imx_rproc_addr_init(struct im 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);