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[v4,10/11] net: Replace strcpy() with __get_task_comm()

Message ID 20240729023719.1933-11-laoar.shao@gmail.com (mailing list archive)
State Handled Elsewhere
Delegated to: Paul Moore
Headers show
Series Improve the copy of task comm | expand

Commit Message

Yafang Shao July 29, 2024, 2:37 a.m. UTC 
To prevent errors from occurring when the src string is longer than the dst
string in strcpy(), we should use __get_task_comm() instead. This approach
also facilitates future extensions to the task comm.

Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: David Ahern <dsahern@kernel.org>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
---
 net/ipv6/ndisc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 254b192c5705..10d8e8c6ca02 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1942,7 +1942,7 @@  static void ndisc_warn_deprecated_sysctl(const struct ctl_table *ctl,
 	static char warncomm[TASK_COMM_LEN];
 	static int warned;
 	if (strcmp(warncomm, current->comm) && warned < 5) {
-		strcpy(warncomm, current->comm);
+		__get_task_comm(warncomm, TASK_COMM_LEN, current);
 		pr_warn("process `%s' is using deprecated sysctl (%s) net.ipv6.neigh.%s.%s - use net.ipv6.neigh.%s.%s_ms instead\n",
 			warncomm, func,
 			dev_name, ctl->procname,