From 7475c4c2e5d6997de0582eaec85748ab99c30d0a Mon Sep 17 00:00:00 2001 From: Armin Kuster Date: Mon, 8 Feb 2016 17:29:41 -0800 Subject: qemu: Security fix CVE-2016-1568 CVE-2016-1568 Qemu: ide: ahci use-after-free vulnerability in aio port commands (From OE-Core rev: b1b2f629f8e2febd086eae8fabd24322333ea172) Signed-off-by: Armin Kuster Signed-off-by: Ross Burton Signed-off-by: Richard Purdie --- .../recipes-devtools/qemu/qemu/CVE-2016-1568.patch | 46 ++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 meta/recipes-devtools/qemu/qemu/CVE-2016-1568.patch (limited to 'meta/recipes-devtools/qemu/qemu') 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 0000000000..56fd346ae6 --- /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 +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 +Signed-off-by: Prasad J Pandit +Reviewed-by: John Snow +Message-id: 1452282511-4116-1-git-send-email-ppandit@redhat.com +Signed-off-by: John Snow + +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 + +--- + hw/ide/ahci.c | 1 + + 1 file changed, 1 insertion(+) + +Index: qemu-2.5.0/hw/ide/ahci.c +=================================================================== +--- qemu-2.5.0.orig/hw/ide/ahci.c ++++ qemu-2.5.0/hw/ide/ahci.c +@@ -910,6 +910,7 @@ 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) -- cgit v1.2.3-54-g00ecf