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| author | Ashutosh Dixit <ashutosh.dixit@intel.com> | 2013-11-27 17:58:41 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-11-27 20:03:38 +0100 |
| commit | 1e31aa9270daab40c7aef9d5488982e3475b87ef (patch) | |
| tree | b1c30376de230c4b21965622c5fc4e2705188ac5 /Documentation/mic | |
| parent | misc: mic: Bug fix for sysfs poll usage. (diff) | |
| download | linux-1e31aa9270daab40c7aef9d5488982e3475b87ef.tar.xz linux-1e31aa9270daab40c7aef9d5488982e3475b87ef.zip | |
misc: mic: Fix user space namespace pollution from mic_common.h.
Avoid declaring ALIGN() and __aligned() in
include/uapi/linux/mic_common.h since they pollute user space
namespace. Also, mic_aligned_size() can be simply replaced simply by
sizeof() since all structures where mic_aligned_size() is used are
declared using __attribute__ ((aligned(8)));
--
>From mail from H Peter Anvin about this:
On Fri, Nov 08, 2013 H Peter Anvin <h.peter.anvin@intel.com> wrote:
Subject: Namespace pollution in mic_common.h
This puts two macros, ALIGN() and __aligned(), into arbitrary user space
namespace. This really isn't safe or acceptable, especially since those
symbols are highly generic.
...
When these structures are forced-aligned, they will in fact have padding
automatically added by the compiler to an 8-byte boundary anyway, so
mic_aligned_size() does nothing.
...
Reported-by: H Peter Anvin <h.peter.anvin@intel.com>
Reviewed-by: Sudeep Dutt <sudeep.dutt@intel.com>
Signed-off-by: Nikhil Rao <nikhil.rao@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/mic')
| -rw-r--r-- | Documentation/mic/mpssd/mpssd.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/mic/mpssd/mpssd.c b/Documentation/mic/mpssd/mpssd.c index 5c7fdda56f0e..91f9e8e4ef7b 100644 --- a/Documentation/mic/mpssd/mpssd.c +++ b/Documentation/mic/mpssd/mpssd.c @@ -313,7 +313,7 @@ static struct mic_device_desc *get_device_desc(struct mic_info *mic, int type) int i; void *dp = get_dp(mic, type); - for (i = mic_aligned_size(struct mic_bootparam); i < PAGE_SIZE; + for (i = sizeof(struct mic_bootparam); i < PAGE_SIZE; i += mic_total_desc_size(d)) { d = dp + i; @@ -520,7 +520,7 @@ static void * virtio_net(void *arg) { static __u8 vnet_hdr[2][sizeof(struct virtio_net_hdr)]; - static __u8 vnet_buf[2][MAX_NET_PKT_SIZE] __aligned(64); + static __u8 vnet_buf[2][MAX_NET_PKT_SIZE] __attribute__ ((aligned(64))); struct iovec vnet_iov[2][2] = { { { .iov_base = vnet_hdr[0], .iov_len = sizeof(vnet_hdr[0]) }, { .iov_base = vnet_buf[0], .iov_len = sizeof(vnet_buf[0]) } }, |