From 84168d1b54e76a1bcb5192991adde5176abe02e3 Mon Sep 17 00:00:00 2001 From: Bjorn Andersson Date: Thu, 7 Jan 2021 15:31:19 -0800 Subject: soc: qcom: mdt_loader: Validate that p_filesz < p_memsz The code validates that segments of p_memsz bytes of a segment will fit in the provided memory region, but does not validate that p_filesz bytes will, which means that an incorrectly crafted ELF header might write beyond the provided memory region. Fixes: 051fb70fd4ea ("remoteproc: qcom: Driver for the self-authenticating Hexagon v5") Reviewed-by: Sibi Sankar Link: https://lore.kernel.org/r/20210107233119.717173-1-bjorn.andersson@linaro.org Signed-off-by: Bjorn Andersson --- drivers/soc/qcom/mdt_loader.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers/soc') diff --git a/drivers/soc/qcom/mdt_loader.c b/drivers/soc/qcom/mdt_loader.c index 24cd193dec55..2ddaee5ef9cc 100644 --- a/drivers/soc/qcom/mdt_loader.c +++ b/drivers/soc/qcom/mdt_loader.c @@ -230,6 +230,14 @@ static int __qcom_mdt_load(struct device *dev, const struct firmware *fw, break; } + if (phdr->p_filesz > phdr->p_memsz) { + dev_err(dev, + "refusing to load segment %d with p_filesz > p_memsz\n", + i); + ret = -EINVAL; + break; + } + ptr = mem_region + offset; if (phdr->p_filesz && phdr->p_offset < fw->size) { -- cgit v1.2.3