| commit | 8561c9244ddf1122dfe7ccac9b23f506062f1499 | |
| author | Michael S. Tsirkin <mst@redhat.com> | |
| Thu, 10 Sep 2015 13:41:17 +0000 (10 16:41 +0300) | ||
| committer | Michael S. Tsirkin <mst@redhat.com> | |
| Thu, 1 Oct 2015 13:16:52 +0000 (1 16:16 +0300) | ||
| tree | 80ad18ab7472e7cdc9bab615093c29cd92067cdb | treesnapshot (tar.gz zip) |
| parent | 9fac18f03a9040b67ec38e14d3e1ed34db9c7e06 | commitdiff |
exec: allocate PROT_NONE pages on top of RAM
This inserts a read and write protected page between RAM and QEMU
memory, for file-backend RAM.
This makes it harder to exploit QEMU bugs resulting from buffer
overflows in devices using variants of cpu_physical_memory_map,
dma_memory_map etc.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
This inserts a read and write protected page between RAM and QEMU
memory, for file-backend RAM.
This makes it harder to exploit QEMU bugs resulting from buffer
overflows in devices using variants of cpu_physical_memory_map,
dma_memory_map etc.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
| exec.c | diffblobblamehistory |