| Message ID | 20200722201047.12975-2-sibis@codeaurora.org (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | e013f455d95add874f310dc47c608e8c70692ae5 |
| Headers | show |
| Series | Add modem debug features | expand |
On Wed 22 Jul 13:10 PDT 2020, Sibi Sankar wrote: > The following mem abort is observed when the mba firmware size exceeds > the allocated mba region. MBA firmware size is restricted to a maximum > size of 1M and remaining memory region is used by modem debug policy > firmware when available. Hence verify whether the MBA firmware size lies > within the allocated memory region and is not greater than 1M before > loading. > > Err Logs: > Unable to handle kernel paging request at virtual address > Mem abort info: > ... > Call trace: > __memcpy+0x110/0x180 > rproc_start+0x40/0x218 > rproc_boot+0x5b4/0x608 > state_store+0x54/0xf8 > dev_attr_store+0x44/0x60 > sysfs_kf_write+0x58/0x80 > kernfs_fop_write+0x140/0x230 > vfs_write+0xc4/0x208 > ksys_write+0x74/0xf8 > __arm64_sys_write+0x24/0x30 > ... > > Fixes: 051fb70fd4ea4 ("remoteproc: qcom: Driver for the self-authenticating Hexagon v5") > Cc: stable@vger.kernel.org Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> > Signed-off-by: Sibi Sankar <sibis@codeaurora.org> > --- > drivers/remoteproc/qcom_q6v5_mss.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c > index 718acebae777f..4e72c9e30426c 100644 > --- a/drivers/remoteproc/qcom_q6v5_mss.c > +++ b/drivers/remoteproc/qcom_q6v5_mss.c > @@ -412,6 +412,12 @@ static int q6v5_load(struct rproc *rproc, const struct firmware *fw) > { > struct q6v5 *qproc = rproc->priv; > > + /* MBA is restricted to a maximum size of 1M */ > + if (fw->size > qproc->mba_size || fw->size > SZ_1M) { > + dev_err(qproc->dev, "MBA firmware load failed\n"); I'll change this to "MBA firmware exceeds size limit\n". Please let me know if you object. Regards, Bjorn > + return -EINVAL; > + } > + > memcpy(qproc->mba_region, fw->data, fw->size); > > return 0; > -- > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, > a Linux Foundation Collaborative Project >
diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c index 718acebae777f..4e72c9e30426c 100644 --- a/drivers/remoteproc/qcom_q6v5_mss.c +++ b/drivers/remoteproc/qcom_q6v5_mss.c @@ -412,6 +412,12 @@ static int q6v5_load(struct rproc *rproc, const struct firmware *fw) { struct q6v5 *qproc = rproc->priv; + /* MBA is restricted to a maximum size of 1M */ + if (fw->size > qproc->mba_size || fw->size > SZ_1M) { + dev_err(qproc->dev, "MBA firmware load failed\n"); + return -EINVAL; + } + memcpy(qproc->mba_region, fw->data, fw->size); return 0;
The following mem abort is observed when the mba firmware size exceeds the allocated mba region. MBA firmware size is restricted to a maximum size of 1M and remaining memory region is used by modem debug policy firmware when available. Hence verify whether the MBA firmware size lies within the allocated memory region and is not greater than 1M before loading. Err Logs: Unable to handle kernel paging request at virtual address Mem abort info: ... Call trace: __memcpy+0x110/0x180 rproc_start+0x40/0x218 rproc_boot+0x5b4/0x608 state_store+0x54/0xf8 dev_attr_store+0x44/0x60 sysfs_kf_write+0x58/0x80 kernfs_fop_write+0x140/0x230 vfs_write+0xc4/0x208 ksys_write+0x74/0xf8 __arm64_sys_write+0x24/0x30 ... Fixes: 051fb70fd4ea4 ("remoteproc: qcom: Driver for the self-authenticating Hexagon v5") Cc: stable@vger.kernel.org Signed-off-by: Sibi Sankar <sibis@codeaurora.org> --- drivers/remoteproc/qcom_q6v5_mss.c | 6 ++++++ 1 file changed, 6 insertions(+)