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-rw-r--r--meta/recipes-devtools/qemu/qemu/CVE-2016-1568.patch46
1 files changed, 46 insertions, 0 deletions
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2016-1568.patch b/meta/recipes-devtools/qemu/qemu/CVE-2016-1568.patch
new file mode 100644
index 00000000000..9c40ffb5f8a
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2016-1568.patch
@@ -0,0 +1,46 @@
+From 4ab0359a8ae182a7ac5c99609667273167703fab Mon Sep 17 00:00:00 2001
+From: Prasad J Pandit <pjp@fedoraproject.org>
+Date: Mon, 11 Jan 2016 14:10:42 -0500
+Subject: [PATCH] ide: ahci: reset ncq object to unused on error
+
+When processing NCQ commands, AHCI device emulation prepares a
+NCQ transfer object; To which an aio control block(aiocb) object
+is assigned in 'execute_ncq_command'. In case, when the NCQ
+command is invalid, the 'aiocb' object is not assigned, and NCQ
+transfer object is left as 'used'. This leads to a use after
+free kind of error in 'bdrv_aio_cancel_async' via 'ahci_reset_port'.
+Reset NCQ transfer object to 'unused' to avoid it.
+
+[Maintainer edit: s/ACHI/AHCI/ in the commit message. --js]
+
+Reported-by: Qinghao Tang <luodalongde@gmail.com>
+Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
+Reviewed-by: John Snow <jsnow@redhat.com>
+Message-id: 1452282511-4116-1-git-send-email-ppandit@redhat.com
+Signed-off-by: John Snow <jsnow@redhat.com>
+
+Upstream-Status: Backport
+
+http://git.qemu.org/?p=qemu.git;a=commit;h=4ab0359a8ae182a7ac5c99609667273167703fab
+
+CVE: CVE-2016-1568
+[Yocto # 9013]
+
+Signed-off-by: Armin Kuster <akuster@mvista.com>
+
+---
+ hw/ide/ahci.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+Index: qemu-2.4.0/hw/ide/ahci.c
+===================================================================
+--- qemu-2.4.0.orig/hw/ide/ahci.c
++++ qemu-2.4.0/hw/ide/ahci.c
+@@ -898,6 +898,7 @@ static void ncq_err(NCQTransferState *nc
+ ide_state->error = ABRT_ERR;
+ ide_state->status = READY_STAT | ERR_STAT;
+ ncq_tfs->drive->port_regs.scr_err |= (1 << ncq_tfs->tag);
++ ncq_tfs->used = 0;
+ }
+
+ static void ncq_finish(NCQTransferState *ncq_tfs)