>From Alexey Kuznetsov <[email protected]>
[PATCH] IPC: access to unmapped vmalloc area in grow_ary()
grow_ary() should not copy struct ipc_id_ary (it copies new->p, not
new). Due to this, memcpy() src pointer could hit unmapped vmalloc page
when near page boundary.
Found during OpenVZ stress testing
Signed-off-by: Alexey Kuznetsov <[email protected]>
Signed-off-by: Kirill Korotaev <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
ipc/util.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- linux-2.6.16.9.orig/ipc/util.c
+++ linux-2.6.16.9/ipc/util.c
@@ -182,8 +182,7 @@ static int grow_ary(struct ipc_ids* ids,
if(new == NULL)
return size;
new->size = newsize;
- memcpy(new->p, ids->entries->p, sizeof(struct kern_ipc_perm *)*size +
- sizeof(struct ipc_id_ary));
+ memcpy(new->p, ids->entries->p, sizeof(struct kern_ipc_perm *)*size);
for(i=size;i<newsize;i++) {
new->p[i] = NULL;
}
--
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
