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NET: ROSE: Don't use static buffer.

Telusuri Sumber 
The use of a static buffer in rose2asc() to return its result is not
threadproof and can result in corruption if multiple threads are trying
to use one of the procfs files based on rose2asc().

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ralf Baechle
2009-07-26 19:11:14 -07:00
committed by David S. Miller
orang tua d513d018e2
melakukan dcf777f6ed
3 mengubah file dengan 21 tambahan dan 22 penghapusan
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18
net/rose/af_rose.c
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@@ -92,23 +92,21 @@ static void rose_set_lockdep_key(struct net_device *dev)
/*
* Convert a ROSE address into text.
*/
const char *rose2asc(const rose_address *addr)
char *rose2asc(char *buf, const rose_address *addr)
{
static char buffer[11];
if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
addr->rose_addr[4] == 0x00) {
strcpy(buffer, "*");
strcpy(buf, "*");
} else {
sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
addr->rose_addr[1] & 0xFF,
addr->rose_addr[2] & 0xFF,
addr->rose_addr[3] & 0xFF,
addr->rose_addr[4] & 0xFF);
}
return buffer;
return buf;
}
/*
@@ -1437,7 +1435,7 @@ static void rose_info_stop(struct seq_file *seq, void *v)
static int rose_info_show(struct seq_file *seq, void *v)
{
char buf[11];
char buf[11], rsbuf[11];
if (v == SEQ_START_TOKEN)
seq_puts(seq,
@@ -1455,8 +1453,8 @@ static int rose_info_show(struct seq_file *seq, void *v)
devname = dev->name;
seq_printf(seq, "%-10s %-9s ",
rose2asc(&rose->dest_addr),
ax2asc(buf, &rose->dest_call));
rose2asc(rsbuf, &rose->dest_addr),
ax2asc(buf, &rose->dest_call));
if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
callsign = "??????-?";
@@ -1465,7 +1463,7 @@ static int rose_info_show(struct seq_file *seq, void *v)
seq_printf(seq,
"%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
rose2asc(&rose->source_addr),
rose2asc(rsbuf, &rose->source_addr),
callsign,
devname,
rose->lci & 0x0FFF,