* gnu/packages/patches/qemu-CVE-2015-5154-pt1.patch, gnu/packages/patches/qemu-CVE-2015-5154-pt2.patch, gnu/packages/patches/qemu-CVE-2015-5154-pt3.patch, gnu/packages/patches/qemu-CVE-2015-5158.patch: New files. * gnu-system.am (dist_patch_DATA): Add them. * gnu/packages/qemu.scm (qemu-headless)[source]: Add patches.
72 lines
2 KiB
Diff
72 lines
2 KiB
Diff
From 1d3c2268f8708126a34064c2e0c1000b40e6f3e5 Mon Sep 17 00:00:00 2001
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From: Kevin Wolf <kwolf@redhat.com>
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Date: Wed, 3 Jun 2015 14:41:27 +0200
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Subject: [PATCH 3/3] ide: Clear DRQ after handling all expected accesses
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This is additional hardening against an end_transfer_func that fails to
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clear the DRQ status bit. The bit must be unset as soon as the PIO
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transfer has completed, so it's better to do this in a central place
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instead of duplicating the code in all commands (and forgetting it in
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some).
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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---
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hw/ide/core.c | 16 ++++++++++++----
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1 file changed, 12 insertions(+), 4 deletions(-)
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diff --git a/hw/ide/core.c b/hw/ide/core.c
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index 44fcc23..50449ca 100644
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--- a/hw/ide/core.c
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+++ b/hw/ide/core.c
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@@ -2028,8 +2028,10 @@ void ide_data_writew(void *opaque, uint32_t addr, uint32_t val)
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*(uint16_t *)p = le16_to_cpu(val);
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p += 2;
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s->data_ptr = p;
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- if (p >= s->data_end)
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+ if (p >= s->data_end) {
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+ s->status &= ~DRQ_STAT;
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s->end_transfer_func(s);
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+ }
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}
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uint32_t ide_data_readw(void *opaque, uint32_t addr)
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@@ -2053,8 +2055,10 @@ uint32_t ide_data_readw(void *opaque, uint32_t addr)
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ret = cpu_to_le16(*(uint16_t *)p);
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p += 2;
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s->data_ptr = p;
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- if (p >= s->data_end)
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+ if (p >= s->data_end) {
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+ s->status &= ~DRQ_STAT;
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s->end_transfer_func(s);
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+ }
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return ret;
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}
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@@ -2078,8 +2082,10 @@ void ide_data_writel(void *opaque, uint32_t addr, uint32_t val)
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*(uint32_t *)p = le32_to_cpu(val);
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p += 4;
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s->data_ptr = p;
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- if (p >= s->data_end)
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+ if (p >= s->data_end) {
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+ s->status &= ~DRQ_STAT;
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s->end_transfer_func(s);
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+ }
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}
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uint32_t ide_data_readl(void *opaque, uint32_t addr)
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@@ -2103,8 +2109,10 @@ uint32_t ide_data_readl(void *opaque, uint32_t addr)
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ret = cpu_to_le32(*(uint32_t *)p);
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p += 4;
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s->data_ptr = p;
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- if (p >= s->data_end)
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+ if (p >= s->data_end) {
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+ s->status &= ~DRQ_STAT;
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s->end_transfer_func(s);
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+ }
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return ret;
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}
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--
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1.8.3.1
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