diff mbox series

[PULL,05/64] slirp: remove unused EMU_RSH

Message ID 20181218230442.27887-6-samuel.thibault@ens-lyon.org (mailing list archive)
State New, archived
Headers show
Series [PULL,01/64] slirp: associate slirp_output callback with the Slirp context | expand

Commit Message

Samuel Thibault Dec. 18, 2018, 11:03 p.m. UTC 
From: Marc-André Lureau <marcandre.lureau@redhat.com>

EMU_RSH handling was dropped in commit
0d62c4cfe21752df4c1d6e2c2398f15d5eaa794a.

The assignment, and subsequent free() of ex_ptr->ex_exec to so->extra
looks unsafe (double free is likely to occur).

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
---
 slirp/misc.h     | 1 -
 slirp/slirp.c    | 2 --
 slirp/socket.c   | 4 ----
 slirp/tcp_subr.c | 1 -
 4 files changed, 8 deletions(-)
diff mbox series

Patch

diff --git a/slirp/misc.h b/slirp/misc.h
index 64ca88c3b7..94829722cd 100644
--- a/slirp/misc.h
+++ b/slirp/misc.h
@@ -26,7 +26,6 @@  struct ex_list {
 #define EMU_REALAUDIO 0x5
 #define EMU_RLOGIN 0x6
 #define EMU_IDENT 0x7
-#define EMU_RSH 0x8
 
 #define EMU_NOCONNECT 0x10	/* Don't connect */
 
diff --git a/slirp/slirp.c b/slirp/slirp.c
index 06b5c76939..e5968d9aea 100644
--- a/slirp/slirp.c
+++ b/slirp/slirp.c
@@ -1499,8 +1499,6 @@  static int slirp_state_load(QEMUFile *f, void *opaque, int version_id)
         }
         if (!ex_ptr)
             return -EINVAL;
-
-        so->extra = (void *)ex_ptr->ex_exec;
     }
 
     return vmstate_load_state(f, &vmstate_slirp, slirp, version_id);
diff --git a/slirp/socket.c b/slirp/socket.c
index c01d8696af..041ec5061a 100644
--- a/slirp/socket.c
+++ b/slirp/socket.c
@@ -89,10 +89,6 @@  sofree(struct socket *so)
   soqfree(so, &slirp->if_fastq);
   soqfree(so, &slirp->if_batchq);
 
-  if (so->so_emu==EMU_RSH && so->extra) {
-	sofree(so->extra);
-	so->extra=NULL;
-  }
   if (so == slirp->tcp_last_so) {
       slirp->tcp_last_so = &slirp->tcb;
   } else if (so == slirp->udp_last_so) {
diff --git a/slirp/tcp_subr.c b/slirp/tcp_subr.c
index e7b2baa087..fd7521854e 100644
--- a/slirp/tcp_subr.c
+++ b/slirp/tcp_subr.c
@@ -541,7 +541,6 @@  static const struct tos_t tcptos[] = {
 	  {0, 23, IPTOS_LOWDELAY, 0},	/* telnet */
 	  {0, 80, IPTOS_THROUGHPUT, 0},	/* WWW */
 	  {0, 513, IPTOS_LOWDELAY, EMU_RLOGIN|EMU_NOCONNECT},	/* rlogin */
-	  {0, 514, IPTOS_LOWDELAY, EMU_RSH|EMU_NOCONNECT},	/* shell */
 	  {0, 544, IPTOS_LOWDELAY, EMU_KSH},		/* kshell */
 	  {0, 543, IPTOS_LOWDELAY, 0},	/* klogin */
 	  {0, 6667, IPTOS_THROUGHPUT, EMU_IRC},	/* IRC */