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Commit bdb279ba authored by Bernd Eckenfels's avatar Bernd Eckenfels
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fixes debian bug#134600 (sigsegv in netstat on negative inoded in 

/proc/net/udp) on "netstat -lpu". Thanks to Arnaud Giersch for the report.
parent 4478c3cf
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Showing with 34 additions and 30 deletions
netstat.c
View file @ bdb279ba
......@@ -6,7 +6,7 @@
* NET-3 Networking Distribution for the LINUX operating
* system.
*
* Version: $Id: netstat.c,v 1.45 2001/11/25 06:48:50 ecki Exp $
* Version: $Id: netstat.c,v 1.46 2002/02/19 00:55:35 ecki Exp $
*
* Authors: Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de>
* Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
......@@ -216,7 +216,7 @@ FILE *procinfo;
static struct prg_node {
struct prg_node *next;
int inode;
unsigned long inode;
char name[PROGNAME_WIDTH];
} *prg_hash[PRG_HASH_SIZE];
......@@ -249,7 +249,7 @@ static char prg_cache_loaded = 0;
/* NOT working as of glibc-2.0.7: */
#undef DIRENT_HAVE_D_TYPE_WORKS
static void prg_cache_add(int inode, char *name)
static void prg_cache_add(unsigned long inode, char *name)
{
unsigned hi = PRG_HASHIT(inode);
struct prg_node **pnp,*pn;
......@@ -272,7 +272,7 @@ static void prg_cache_add(int inode, char *name)
strcpy(pn->name,name);
}
static const char *prg_cache_get(int inode)
static const char *prg_cache_get(unsigned long inode)
{
unsigned hi=PRG_HASHIT(inode);
struct prg_node *pn;
......@@ -295,16 +295,18 @@ static void prg_cache_clear(void)
prg_cache_loaded=0;
}
static void extract_type_1_socket_inode(const char lname[], long * inode_p) {
static int extract_type_1_socket_inode(const char lname[], unsigned long * inode_p) {
/* If lname is of the form "socket:[12345]", extract the "12345"
as *inode_p. Otherwise, return -1 as *inode_p.
*/
if (strlen(lname) < PRG_SOCKET_PFXl+3) *inode_p = -1;
else if (memcmp(lname, PRG_SOCKET_PFX, PRG_SOCKET_PFXl)) *inode_p = -1;
else if (lname[strlen(lname)-1] != ']') *inode_p = -1;
else {
if (strlen(lname) < PRG_SOCKET_PFXl+3) return(-1);
if (memcmp(lname, PRG_SOCKET_PFX, PRG_SOCKET_PFXl)) return(-1);
if (lname[strlen(lname)-1] != ']') return(-1);
{
char inode_str[strlen(lname + 1)]; /* e.g. "12345" */
const int inode_str_len = strlen(lname) - PRG_SOCKET_PFXl - 1;
char *serr;
......@@ -313,37 +315,41 @@ static void extract_type_1_socket_inode(const char lname[], long * inode_p) {
inode_str[inode_str_len] = '\0';
*inode_p = strtol(inode_str,&serr,0);
if (!serr || *serr || *inode_p < 0 || *inode_p >= INT_MAX)
*inode_p = -1;
return(-1);
}
return(0);
}
static void extract_type_2_socket_inode(const char lname[], long * inode_p) {
static int extract_type_2_socket_inode(const char lname[], unsigned long * inode_p) {
/* If lname is of the form "[0000]:12345", extract the "12345"
as *inode_p. Otherwise, return -1 as *inode_p.
*/
if (strlen(lname) < PRG_SOCKET_PFX2l+1) *inode_p = -1;
else if (memcmp(lname, PRG_SOCKET_PFX2, PRG_SOCKET_PFX2l)) *inode_p = -1;
else {
if (strlen(lname) < PRG_SOCKET_PFX2l+1) return(-1);
if (memcmp(lname, PRG_SOCKET_PFX2, PRG_SOCKET_PFX2l)) return(-1);
{
char *serr;
*inode_p=strtol(lname + PRG_SOCKET_PFX2l,&serr,0);
if (!serr || *serr || *inode_p < 0 || *inode_p >= INT_MAX)
*inode_p = -1;
return(-1);
}
return(0);
}
static void prg_cache_load(void)
{
char line[LINE_MAX],eacces=0;
int procfdlen,fd,cmdllen,lnamelen;
char lname[30],cmdlbuf[512],finbuf[PROGNAME_WIDTH];
long inode;
unsigned long inode;
const char *cs,*cmdlp;
DIR *dirproc=NULL,*dirfd=NULL;
struct dirent *direproc,*direfd;
......@@ -386,11 +392,9 @@ static void prg_cache_load(void)
lnamelen=readlink(line,lname,sizeof(lname)-1);
lname[lnamelen] = '\0'; /*make it a null-terminated string*/
extract_type_1_socket_inode(lname, &inode);
if (inode < 0) extract_type_2_socket_inode(lname, &inode);
if (inode < 0) continue;
if (extract_type_1_socket_inode(lname, &inode) < 0)
if (extract_type_2_socket_inode(lname, &inode) < 0)
continue;
if (!cmdlp) {
if (procfdlen - PATH_FD_SUFFl + PATH_CMDLINEl >=
......@@ -530,7 +534,7 @@ static void finish_this_one(int uid, unsigned long inode, const char *timers)
printf("%-10s ", pw->pw_name);
else
printf("%-10d ", uid);
printf("%-10ld ",inode);
printf("%-10lu ",inode);
}
if (flag_prg)
printf("%-" PROGNAME_WIDTHs "s",prg_cache_get(inode));
......@@ -719,7 +723,7 @@ static void tcp_do_one(int lnr, const char *line)
return;
num = sscanf(line,
"%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n",
"%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %lu %512s\n",
&d, local_addr, &local_port, rem_addr, &rem_port, &state,
&txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more);
......@@ -847,7 +851,7 @@ static void udp_do_one(int lnr, const char *line)
more[0] = '\0';
num = sscanf(line,
"%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n",
"%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %lu %512s\n",
&d, local_addr, &local_port,
rem_addr, &rem_port, &state,
&txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more);
......@@ -987,7 +991,7 @@ static void raw_do_one(int lnr, const char *line)
more[0] = '\0';
num = sscanf(line,
"%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n",
"%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %lu %512s\n",
&d, local_addr, &local_port, rem_addr, &rem_port, &state,
&txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more);
......@@ -1099,9 +1103,9 @@ static void unix_do_one(int nr, const char *line)
static int has = 0;
char path[MAXPATHLEN], ss_flags[32];
char *ss_proto, *ss_state, *ss_type;
int num, state, type, inode;
int num, state, type;
void *d;
unsigned long refcnt, proto, flags;
unsigned long refcnt, proto, flags, inode;
if (nr == 0) {
if (strstr(line, "Inode"))
......@@ -1109,14 +1113,14 @@ static void unix_do_one(int nr, const char *line)
return;
}
path[0] = '\0';
num = sscanf(line, "%p: %lX %lX %lX %X %X %d %s",
num = sscanf(line, "%p: %lX %lX %lX %X %X %lu %s",
&d, &refcnt, &proto, &flags, &type, &state, &inode, path);
if (num < 6) {
fprintf(stderr, _("warning, got bogus unix line.\n"));
return;
}
if (!(has & HAS_INODE))
snprintf(path,sizeof(path),"%d",inode);
snprintf(path,sizeof(path),"%lu",inode);
if (!flag_all) {
if ((state == SS_UNCONNECTED) && (flags & SO_ACCEPTCON)) {
......@@ -1208,7 +1212,7 @@ static void unix_do_one(int nr, const char *line)
printf("%-5s %-6ld %-11s %-10s %-13s ",
ss_proto, refcnt, ss_flags, ss_type, ss_state);
if (has & HAS_INODE)
printf("%-6d ",inode);
printf("%-6lu ",inode);
else
printf("- ");
if (flag_prg)
......
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