[AX25]: Make ax2asc thread-proof

Ax2asc was still using a static buffer for all invocations which isn't
exactly SMP-safe.  Change ax2asc to take an additional result buffer as
the argument.  Change all callers to provide such a buffer.

Signed-off-by: Ralf Baechle DL5RB <ralf@linux-mips.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 2 deletions

diff --git a/net/ax25/ax25_route.c b/net/ax25/ax25_route.c
index c288526da4ce..26b77d972220 100644
--- a/net/ax25/ax25_route.c
+++ b/net/ax25/ax25_route.c
@@ -298,6 +298,8 @@ static void ax25_rt_seq_stop(struct seq_file *seq, void *v)
 
 static int ax25_rt_seq_show(struct seq_file *seq, void *v)
 {
+        char buf[11];
+
         if (v == SEQ_START_TOKEN)
                 seq_puts(seq, "callsign  dev  mode digipeaters\n");
         else {
@@ -308,7 +310,7 @@ static int ax25_rt_seq_show(struct seq_file *seq, void *v)
                 if (ax25cmp(&ax25_rt->callsign, &null_ax25_address) == 0)
                         callsign = "default";
                 else
-                        callsign = ax2asc(&ax25_rt->callsign);
+                        callsign = ax2asc(buf, &ax25_rt->callsign);
 
                 seq_printf(seq, "%-9s %-4s",
                         callsign,
@@ -328,7 +330,8 @@ static int ax25_rt_seq_show(struct seq_file *seq, void *v)
 
                 if (ax25_rt->digipeat != NULL)
                         for (i = 0; i < ax25_rt->digipeat->ndigi; i++)
-                                seq_printf(seq, " %s", ax2asc(&ax25_rt->digipeat->calls[i]));
+                                seq_printf(seq, " %s",
+                                     ax2asc(buf, &ax25_rt->digipeat->calls[i]));
 
                 seq_puts(seq, "\n");
         }