The patch titled
sgi-xp: add type cast to kzalloc()'d space to avoid slab corruption
has been added to the -mm tree. Its filename is
sgi-xp-add-type-cast-to-kzallocd-space-to-avoid-slab-corruption.patch
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------------------------------------------------------
Subject: sgi-xp: add type cast to kzalloc()'d space to avoid slab corruption
From: Dean Nelson <dcn@xxxxxxx>
A missing type cast results in writing way beyond the end of a kzalloc()'d
memory segment resulting in slab corruption.
Signed-off-by: Dean Nelson <dcn@xxxxxxx>
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/misc/sgi-xp/xpc_uv.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff -puN drivers/misc/sgi-xp/xpc_uv.c~sgi-xp-add-type-cast-to-kzallocd-space-to-avoid-slab-corruption drivers/misc/sgi-xp/xpc_uv.c
--- a/drivers/misc/sgi-xp/xpc_uv.c~sgi-xp-add-type-cast-to-kzallocd-space-to-avoid-slab-corruption
+++ a/drivers/misc/sgi-xp/xpc_uv.c
@@ -3,7 +3,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2008-2009 Silicon Graphics, Inc. All Rights Reserved.
*/
/*
@@ -1010,8 +1010,8 @@ xpc_allocate_recv_msg_slot_uv(struct xpc
continue;
for (entry = 0; entry < nentries; entry++) {
- msg_slot = ch_uv->recv_msg_slots + entry *
- ch->entry_size;
+ msg_slot = (struct xpc_notify_mq_msg_uv *)((u8 *)
+ ch_uv->recv_msg_slots + entry * ch->entry_size);
msg_slot->hdr.msg_slot_number = entry;
}
@@ -1308,7 +1308,7 @@ xpc_handle_notify_mq_msg_uv(struct xpc_p
/* we're dealing with a normal message sent via the notify_mq */
ch_uv = &ch->sn.uv;
- msg_slot = (struct xpc_notify_mq_msg_uv *)((u64)ch_uv->recv_msg_slots +
+ msg_slot = (struct xpc_notify_mq_msg_uv *)((u8 *)ch_uv->recv_msg_slots +
(msg->hdr.msg_slot_number % ch->remote_nentries) *
ch->entry_size);
_
Patches currently in -mm which might be from dcn@xxxxxxx are
origin.patch
sgi-xp-add-type-cast-to-kzallocd-space-to-avoid-slab-corruption.patch
linux-next.patch
sgi-gru-add-support-to-the-gru-driver-for-message-queue-interrupts.patch
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