diff mbox series

[v3] examples/vm_power: fix strcpy buffer overrun

Message ID 20190716111900.33553-1-david.hunt@intel.com (mailing list archive)
State Accepted, archived
Headers
Series [v3] examples/vm_power: fix strcpy buffer overrun |

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/mellanox-Performance-Testing success Performance Testing PASS
ci/intel-Performance-Testing success Performance Testing PASS
ci/Intel-compilation fail apply issues

Commit Message

Hunt, David July 16, 2019, 11:19 a.m. UTC 
  replace strcpy with strlcpy to prevent buffer overrun
With fix, attempting to use a VERY lonng vm name results in a nicely
truncated 32 character name rather than a segfault:
Setting VM Name to [sdfdsfsfsdffdsdsasdsadasdakjshd]

Using strlcpy rather than rte_strlcpy, as the rte_ version is only a
fallback.

As well as the fix in main.c, this patch also changes an occurrence of
rte_strlcpy in channel_manager.c and channel_monitor.c to strlcpy.

Fixes: 59287933a0bb ("examples/vm_power: add options to guest app")
Cc: stable@dpdk.org
Signed-off-by: David Hunt <david.hunt@intel.com>
Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>
---
 examples/vm_power_manager/channel_manager.c | 2 +-
 examples/vm_power_manager/channel_monitor.c | 2 +-
 examples/vm_power_manager/guest_cli/main.c  | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

Comments

Thomas Monjalon July 16, 2019, 11:28 a.m. UTC | #1 
16/07/2019 13:19, David Hunt:
> replace strcpy with strlcpy to prevent buffer overrun
> With fix, attempting to use a VERY lonng vm name results in a nicely
> truncated 32 character name rather than a segfault:
> Setting VM Name to [sdfdsfsfsdffdsdsasdsadasdakjshd]
> 
> Using strlcpy rather than rte_strlcpy, as the rte_ version is only a
> fallback.
> 
> As well as the fix in main.c, this patch also changes an occurrence of
> rte_strlcpy in channel_manager.c and channel_monitor.c to strlcpy.
> 
> Fixes: 59287933a0bb ("examples/vm_power: add options to guest app")
> Cc: stable@dpdk.org
> Signed-off-by: David Hunt <david.hunt@intel.com>
> Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>

Applied, thanks
diff mbox series

Patch

diff --git a/examples/vm_power_manager/channel_manager.c b/examples/vm_power_manager/channel_manager.c
index 2c1332257..4db225755 100644
--- a/examples/vm_power_manager/channel_manager.c
+++ b/examples/vm_power_manager/channel_manager.c
@@ -588,7 +588,7 @@  add_host_channels(void)
 			goto error;
 		}
 		chan_infos[i] = chan_info;
-		rte_strlcpy(chan_info->channel_path, socket_path,
+		strlcpy(chan_info->channel_path, socket_path,
 				sizeof(chan_info->channel_path));
 
 		if (setup_host_channel_info(&chan_info, i) < 0) {
diff --git a/examples/vm_power_manager/channel_monitor.c b/examples/vm_power_manager/channel_monitor.c
index 9d7474da0..496772f8a 100644
--- a/examples/vm_power_manager/channel_monitor.c
+++ b/examples/vm_power_manager/channel_monitor.c
@@ -309,7 +309,7 @@  parse_json_to_pkt(json_t *element, struct channel_packet *pkt,
 				vm_name);
 			return -1;
 		}
-		rte_strlcpy(pkt->vm_name, vm_name, VM_MAX_NAME_SZ);
+		strlcpy(pkt->vm_name, vm_name, VM_MAX_NAME_SZ);
 		pkt->resource_id = resource_id;
 	}
 	return 0;
diff --git a/examples/vm_power_manager/guest_cli/main.c b/examples/vm_power_manager/guest_cli/main.c
index 36365b124..2094145eb 100644
--- a/examples/vm_power_manager/guest_cli/main.c
+++ b/examples/vm_power_manager/guest_cli/main.c
@@ -65,7 +65,7 @@  parse_args(int argc, char **argv)
 		switch (opt) {
 		/* portmask */
 		case 'n':
-			strcpy(policy->vm_name, optarg);
+			strlcpy(policy->vm_name, optarg, VM_MAX_NAME_SZ);
 			printf("Setting VM Name to [%s]\n", policy->vm_name);
 			break;
 		case 'b':