| Message ID | 20240828030321.20688-8-laoar.shao@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Improve the copy of task comm | expand |
Hi, On Wed, Aug 28, 2024 at 11:03:20AM GMT, Yafang Shao wrote: > To prevent errors from occurring when the src string is longer than the dst > string in strcpy(), we should use strscpy() 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(-) > > diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c > index b8eec1b6cc2c..cf7c36463b33 100644 > --- a/net/ipv6/ndisc.c > +++ b/net/ipv6/ndisc.c > @@ -1944,7 +1944,7 @@ 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); > + strscpy(warncomm, current->comm); > 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, > -- > 2.43.5 > > Reviewed-by: Justin Stitt <justinstitt@google.com> Thanks Justin
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c index b8eec1b6cc2c..cf7c36463b33 100644 --- a/net/ipv6/ndisc.c +++ b/net/ipv6/ndisc.c @@ -1944,7 +1944,7 @@ 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); + strscpy(warncomm, current->comm); 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,
To prevent errors from occurring when the src string is longer than the dst string in strcpy(), we should use strscpy() 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(-)