Adding patch for the CAN-2004-0109 issue; bug #47881.

1 files changed, 87 insertions, 0 deletions

diff --git a/sys-kernel/selinux-sources/files/selinux-sources-2.4.25.CAN-2004-0109.patch b/sys-kernel/selinux-sources/files/selinux-sources-2.4.25.CAN-2004-0109.patch
new file mode 100644
index 000000000000..d02b51c57fc6
--- /dev/null
+++ b/sys-kernel/selinux-sources/files/selinux-sources-2.4.25.CAN-2004-0109.patch
@@ -0,0 +1,87 @@
+--- linux/fs/isofs/rock.c.orig
++++ linux/fs/isofs/rock.c
+@@ -14,6 +14,7 @@
+ #include <linux/slab.h>
+ #include <linux/pagemap.h>
+ #include <linux/smp_lock.h>
++#include <asm/page.h>
+ 
+ #include "rock.h"
+ 
+@@ -419,7 +420,7 @@
+   return 0;
+ }
+ 
+-static char *get_symlink_chunk(char *rpnt, struct rock_ridge *rr)
++static char *get_symlink_chunk(char *rpnt, struct rock_ridge *rr, char *plimit)
+ {
+ 	int slen;
+ 	int rootflag;
+@@ -431,16 +432,25 @@
+ 		rootflag = 0;
+ 		switch (slp->flags & ~1) {
+ 		case 0:
++			if (slp->len > plimit - rpnt)
++				return NULL;
+ 			memcpy(rpnt, slp->text, slp->len);
+ 			rpnt+=slp->len;
+ 			break;
++		case 2:
++			if (rpnt >= plimit)
++				return NULL;
++			*rpnt++='.';
++			break;
+ 		case 4:
++			if (2 > plimit - rpnt)
++				return NULL;
+ 			*rpnt++='.';
+-			/* fallthru */
+-		case 2:
+ 			*rpnt++='.';
+ 			break;
+ 		case 8:
++			if (rpnt >= plimit)
++				return NULL;
+ 			rootflag = 1;
+ 			*rpnt++='/';
+ 			break;
+@@ -457,17 +467,23 @@
+ 			 * If there is another SL record, and this component
+ 			 * record isn't continued, then add a slash.
+ 			 */
+-			if ((!rootflag) && (rr->u.SL.flags & 1) && !(oldslp->flags & 1))
++			if ((!rootflag) && (rr->u.SL.flags & 1) &&
++			    !(oldslp->flags & 1)) {
++				if (rpnt >= plimit)
++					return NULL;
+ 				*rpnt++='/';
++			}
+ 			break;
+ 		}
+ 
+ 		/*
+ 		 * If this component record isn't continued, then append a '/'.
+ 		 */
+-		if (!rootflag && !(oldslp->flags & 1))
++		if (!rootflag && !(oldslp->flags & 1)) {
++			if (rpnt >= plimit)
++				return NULL;
+ 			*rpnt++='/';
+-
++		}
+ 	}
+ return rpnt;
+ }
+@@ -548,7 +564,10 @@
+ 			CHECK_SP(goto out);
+ 			break;
+ 		case SIG('S', 'L'):
+-			rpnt = get_symlink_chunk(rpnt, rr);
++			rpnt = get_symlink_chunk(rpnt, rr,
++						 link + (PAGE_SIZE - 1));
++			if (rpnt == NULL)
++				goto out;
+ 			break;
+ 		case SIG('C', 'E'):
+ 			/* This tells is if there is a continuation record */
+