8c721a87ae
- Remove deprecated patch "work-around-SA_RESTART-race" (boo#982208) - Patch queue updated from git://github.com/openSUSE/qemu.git opensuse-2.6 * Patches dropped: 0002-XXX-work-around-SA_RESTART-race-wit.patch 0003-qemu-0.9.0.cvs-binfmt.patch 0004-qemu-cvs-alsa_bitfield.patch 0005-qemu-cvs-alsa_ioctl.patch 0006-qemu-cvs-alsa_mmap.patch 0007-qemu-cvs-gettimeofday.patch 0008-qemu-cvs-ioctl_debug.patch 0009-qemu-cvs-ioctl_nodirection.patch 0010-block-vmdk-Support-creation-of-SCSI.patch 0011-linux-user-add-binfmt-wrapper-for-a.patch 0012-PPC-KVM-Disable-mmu-notifier-check.patch 0013-linux-user-fix-segfault-deadlock.patch 0014-linux-user-binfmt-support-host-bina.patch 0015-linux-user-Ignore-broken-loop-ioctl.patch 0016-linux-user-lock-tcg.patch 0017-linux-user-Run-multi-threaded-code-.patch 0018-linux-user-lock-tb-flushing-too.patch 0019-linux-user-Fake-proc-cpuinfo.patch 0020-linux-user-implement-FS_IOC_GETFLAG.patch 0021-linux-user-implement-FS_IOC_SETFLAG.patch 0022-linux-user-XXX-disable-fiemap.patch 0023-slirp-nooutgoing.patch 0024-vnc-password-file-and-incoming-conn.patch 0025-linux-user-add-more-blk-ioctls.patch 0026-linux-user-use-target_ulong.patch 0027-block-Add-support-for-DictZip-enabl.patch 0028-block-Add-tar-container-format.patch OBS-URL: https://build.opensuse.org/request/show/408549 OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=305
77 lines
2.5 KiB
Diff
77 lines
2.5 KiB
Diff
From ff65fa87b6d7d4e7dbda895181c9afc80b07c5e3 Mon Sep 17 00:00:00 2001
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From: Prasad J Pandit <pjp@fedoraproject.org>
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Date: Thu, 19 May 2016 16:09:31 +0530
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Subject: [PATCH] esp: check dma length before reading scsi
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command(CVE-2016-4441)
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The 53C9X Fast SCSI Controller(FSC) comes with an internal 16-byte
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FIFO buffer. It is used to handle command and data transfer.
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Routine get_cmd() uses DMA to read scsi commands into this buffer.
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Add check to validate DMA length against buffer size to avoid any
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overrun.
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Fixes CVE-2016-4441.
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Reported-by: Li Qiang <liqiang6-s@360.cn>
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Cc: qemu-stable@nongnu.org
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Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
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Message-Id: <1463654371-11169-3-git-send-email-ppandit@redhat.com>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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(cherry picked from commit 6c1fef6b59563cc415f21e03f81539ed4b33ad90)
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[BR: CVE-2016-4441 BSC#980723]
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Signed-off-by: Bruce Rogers <brogers@suse.com>
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---
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hw/scsi/esp.c | 11 +++++++----
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1 file changed, 7 insertions(+), 4 deletions(-)
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diff --git a/hw/scsi/esp.c b/hw/scsi/esp.c
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index 01497e6..591c817 100644
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--- a/hw/scsi/esp.c
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+++ b/hw/scsi/esp.c
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@@ -82,7 +82,7 @@ void esp_request_cancelled(SCSIRequest *req)
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}
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}
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-static uint32_t get_cmd(ESPState *s, uint8_t *buf)
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+static uint32_t get_cmd(ESPState *s, uint8_t *buf, uint8_t buflen)
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{
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uint32_t dmalen;
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int target;
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@@ -92,6 +92,9 @@ static uint32_t get_cmd(ESPState *s, uint8_t *buf)
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dmalen = s->rregs[ESP_TCLO];
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dmalen |= s->rregs[ESP_TCMID] << 8;
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dmalen |= s->rregs[ESP_TCHI] << 16;
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+ if (dmalen > buflen) {
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+ return 0;
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+ }
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s->dma_memory_read(s->dma_opaque, buf, dmalen);
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} else {
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dmalen = s->ti_size;
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@@ -166,7 +169,7 @@ static void handle_satn(ESPState *s)
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s->dma_cb = handle_satn;
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return;
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}
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- len = get_cmd(s, buf);
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+ len = get_cmd(s, buf, sizeof(buf));
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if (len)
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do_cmd(s, buf);
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}
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@@ -180,7 +183,7 @@ static void handle_s_without_atn(ESPState *s)
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s->dma_cb = handle_s_without_atn;
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return;
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}
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- len = get_cmd(s, buf);
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+ len = get_cmd(s, buf, sizeof(buf));
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if (len) {
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do_busid_cmd(s, buf, 0);
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}
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@@ -192,7 +195,7 @@ static void handle_satn_stop(ESPState *s)
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s->dma_cb = handle_satn_stop;
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return;
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}
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- s->cmdlen = get_cmd(s, s->cmdbuf);
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+ s->cmdlen = get_cmd(s, s->cmdbuf, sizeof(s->cmdbuf));
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if (s->cmdlen) {
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trace_esp_handle_satn_stop(s->cmdlen);
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s->do_cmd = 1;
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