diff options
Diffstat (limited to 'gnu/packages/patches/qemu-CVE-2015-5154-pt3.patch')
| -rw-r--r-- | gnu/packages/patches/qemu-CVE-2015-5154-pt3.patch | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/gnu/packages/patches/qemu-CVE-2015-5154-pt3.patch b/gnu/packages/patches/qemu-CVE-2015-5154-pt3.patch new file mode 100644 index 0000000000..3ade9b1600 --- /dev/null +++ b/gnu/packages/patches/qemu-CVE-2015-5154-pt3.patch @@ -0,0 +1,71 @@ +From 1d3c2268f8708126a34064c2e0c1000b40e6f3e5 Mon Sep 17 00:00:00 2001 +From: Kevin Wolf <kwolf@redhat.com> +Date: Wed, 3 Jun 2015 14:41:27 +0200 +Subject: [PATCH 3/3] ide: Clear DRQ after handling all expected accesses + +This is additional hardening against an end_transfer_func that fails to +clear the DRQ status bit. The bit must be unset as soon as the PIO +transfer has completed, so it's better to do this in a central place +instead of duplicating the code in all commands (and forgetting it in +some). + +Signed-off-by: Kevin Wolf <kwolf@redhat.com> +--- + hw/ide/core.c | 16 ++++++++++++---- + 1 file changed, 12 insertions(+), 4 deletions(-) + +diff --git a/hw/ide/core.c b/hw/ide/core.c +index 44fcc23..50449ca 100644 +--- a/hw/ide/core.c ++++ b/hw/ide/core.c +@@ -2028,8 +2028,10 @@ void ide_data_writew(void *opaque, uint32_t addr, uint32_t val) + *(uint16_t *)p = le16_to_cpu(val); + p += 2; + s->data_ptr = p; +- if (p >= s->data_end) ++ if (p >= s->data_end) { ++ s->status &= ~DRQ_STAT; + s->end_transfer_func(s); ++ } + } + + uint32_t ide_data_readw(void *opaque, uint32_t addr) +@@ -2053,8 +2055,10 @@ uint32_t ide_data_readw(void *opaque, uint32_t addr) + ret = cpu_to_le16(*(uint16_t *)p); + p += 2; + s->data_ptr = p; +- if (p >= s->data_end) ++ if (p >= s->data_end) { ++ s->status &= ~DRQ_STAT; + s->end_transfer_func(s); ++ } + return ret; + } + +@@ -2078,8 +2082,10 @@ void ide_data_writel(void *opaque, uint32_t addr, uint32_t val) + *(uint32_t *)p = le32_to_cpu(val); + p += 4; + s->data_ptr = p; +- if (p >= s->data_end) ++ if (p >= s->data_end) { ++ s->status &= ~DRQ_STAT; + s->end_transfer_func(s); ++ } + } + + uint32_t ide_data_readl(void *opaque, uint32_t addr) +@@ -2103,8 +2109,10 @@ uint32_t ide_data_readl(void *opaque, uint32_t addr) + ret = cpu_to_le32(*(uint32_t *)p); + p += 4; + s->data_ptr = p; +- if (p >= s->data_end) ++ if (p >= s->data_end) { ++ s->status &= ~DRQ_STAT; + s->end_transfer_func(s); ++ } + return ret; + } + +-- +1.8.3.1 + |