svn commit: r289768 - head/sys/amd64/linux32

[John Baldwin]

Author: jhb
Date: Thu Oct 22 21:23:58 2015
New Revision: 289768
URL: https://svnweb.freebsd.org/changeset/base/289768

Log:
  Merge r289055 to amd64/linux32:
  
  linux: fix handling of out-of-bounds syscall attempts
  
  Due to an off by one the code would read an entry past the table, as
  opposed to the last entry which contains the nosys handler.

Modified:
  head/sys/amd64/linux32/linux32_sysvec.c

Modified: head/sys/amd64/linux32/linux32_sysvec.c
==============================================================================
--- head/sys/amd64/linux32/linux32_sysvec.c	Thu Oct 22 21:13:35 2015	(r289767)
+++ head/sys/amd64/linux32/linux32_sysvec.c	Thu Oct 22 21:23:58 2015	(r289768)
@@ -741,7 +741,7 @@ linux32_fetch_syscall_args(struct thread
 
 	if (sa->code >= p->p_sysent->sv_size)
 		/* nosys */
-		sa->callp = &p->p_sysent->sv_table[LINUX_SYS_MAXSYSCALL];
+		sa->callp = &p->p_sysent->sv_table[p->p_sysent->sv_size - 1];
 	else
 		sa->callp = &p->p_sysent->sv_table[sa->code];
 	sa->narg = sa->callp->sy_narg;