diff options
Diffstat (limited to 'gnu/packages/patches/qemu-CVE-2016-1568.patch')
| -rw-r--r-- | gnu/packages/patches/qemu-CVE-2016-1568.patch | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/gnu/packages/patches/qemu-CVE-2016-1568.patch b/gnu/packages/patches/qemu-CVE-2016-1568.patch new file mode 100644 index 0000000000..53863704cd --- /dev/null +++ b/gnu/packages/patches/qemu-CVE-2016-1568.patch @@ -0,0 +1,39 @@ +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> +--- + hw/ide/ahci.c | 1 + + 1 file changed, 1 insertion(+) + +diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c +index dd1912e..17f1cbd 100644 +--- a/hw/ide/ahci.c ++++ b/hw/ide/ahci.c +@@ -910,6 +910,7 @@ static void ncq_err(NCQTransferState *ncq_tfs) + 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) +-- +2.6.3 + |