lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Fri, 24 Mar 2017 12:22:25 -0700 From: Wendy Liang <wendy.liang@...inx.com> To: <bjorn.andersson@...aro.org> CC: <linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>, "Wendy Liang" <wendy.liang@...inx.com>, Wendy Liang <jliang@...inx.com>, Michal Simek <michal.simek@...inx.com> Subject: [RFC LINUX PATCH 09/19] remoteproc: check firmware checksum in rproc_is_running_fw() From: Wendy Liang <wendy.liang@...inx.com> In rproc_is_running_fw() function, set the firmware checksum in resource in the resource table and compared it with the one in the loaded resource table. If the firmware checksum in the loaded resource table matches the one calculated with the firmware, the remote is running with the expected firmware. Signed-off-by: Wendy Liang <jliang@...inx.com> Signed-off-by: Michal Simek <michal.simek@...inx.com> --- drivers/remoteproc/remoteproc_core.c | 29 ++++++++++++++++++++++++++--- 1 file changed, 26 insertions(+), 3 deletions(-) diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index 447c28b..e4fb289 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -956,10 +956,33 @@ struct fw_rsc_fw_chksum *rproc_handle_fw_chksum(struct rproc *rproc, */ static bool rproc_is_running_fw(struct rproc *rproc, const struct firmware *fw) { - (void)rproc; - (void) fw; + struct resource_table *loaded_table; + struct fw_rsc_fw_chksum *rsc, *loaded_rsc; + int rsc_fw_chksum_offset; - return false; + rsc = rproc_handle_fw_chksum(rproc, fw, &rsc_fw_chksum_offset); + if (!rsc) + return false; + + if (!rproc_is_running(rproc)) + return false; + + /* look for the loaded resource table */ + loaded_table = rproc_find_loaded_rsc_table(rproc, fw); + if (!loaded_table) + return false; + + loaded_rsc = (void *)loaded_table + rsc_fw_chksum_offset; + if (!loaded_rsc->algo || !loaded_rsc->chksum) + return false; + + if (strncmp(rsc->algo, loaded_rsc->algo, strlen(rsc->algo))) + return false; + + if (memcmp(rsc->chksum, loaded_rsc->chksum, sizeof(rsc->chksum))) + return false; + + return true; } /* -- 1.9.1
Powered by blists - more mailing lists