diff options
Diffstat (limited to 'gnu/packages/patches/qemu-CVE-2015-5154-pt1.patch')
-rw-r--r-- | gnu/packages/patches/qemu-CVE-2015-5154-pt1.patch | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/gnu/packages/patches/qemu-CVE-2015-5154-pt1.patch b/gnu/packages/patches/qemu-CVE-2015-5154-pt1.patch deleted file mode 100644 index 8a41848ddf..0000000000 --- a/gnu/packages/patches/qemu-CVE-2015-5154-pt1.patch +++ /dev/null @@ -1,76 +0,0 @@ -From a9de14175548c04e0f8be7fae219246509ba46a9 Mon Sep 17 00:00:00 2001 -From: Kevin Wolf <kwolf@redhat.com> -Date: Wed, 3 Jun 2015 14:13:31 +0200 -Subject: [PATCH 1/3] ide: Check array bounds before writing to io_buffer - (CVE-2015-5154) - -If the end_transfer_func of a command is called because enough data has -been read or written for the current PIO transfer, and it fails to -correctly call the command completion functions, the DRQ bit in the -status register and s->end_transfer_func may remain set. This allows the -guest to access further bytes in s->io_buffer beyond s->data_end, and -eventually overflowing the io_buffer. - -One case where this currently happens is emulation of the ATAPI command -START STOP UNIT. - -This patch fixes the problem by adding explicit array bounds checks -before accessing the buffer instead of relying on end_transfer_func to -function correctly. - -Cc: qemu-stable@nongnu.org -Signed-off-by: Kevin Wolf <kwolf@redhat.com> ---- - hw/ide/core.c | 16 ++++++++++++++++ - 1 file changed, 16 insertions(+) - -diff --git a/hw/ide/core.c b/hw/ide/core.c -index 122e955..44fcc23 100644 ---- a/hw/ide/core.c -+++ b/hw/ide/core.c -@@ -2021,6 +2021,10 @@ void ide_data_writew(void *opaque, uint32_t addr, uint32_t val) - } - - p = s->data_ptr; -+ if (p + 2 > s->data_end) { -+ return; -+ } -+ - *(uint16_t *)p = le16_to_cpu(val); - p += 2; - s->data_ptr = p; -@@ -2042,6 +2046,10 @@ uint32_t ide_data_readw(void *opaque, uint32_t addr) - } - - p = s->data_ptr; -+ if (p + 2 > s->data_end) { -+ return 0; -+ } -+ - ret = cpu_to_le16(*(uint16_t *)p); - p += 2; - s->data_ptr = p; -@@ -2063,6 +2071,10 @@ void ide_data_writel(void *opaque, uint32_t addr, uint32_t val) - } - - p = s->data_ptr; -+ if (p + 4 > s->data_end) { -+ return; -+ } -+ - *(uint32_t *)p = le32_to_cpu(val); - p += 4; - s->data_ptr = p; -@@ -2084,6 +2096,10 @@ uint32_t ide_data_readl(void *opaque, uint32_t addr) - } - - p = s->data_ptr; -+ if (p + 4 > s->data_end) { -+ return 0; -+ } -+ - ret = cpu_to_le32(*(uint32_t *)p); - p += 4; - s->data_ptr = p; --- -1.8.3.1 |