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These patches make the changes necessary to build the kernel as Position Independent Executable (PIE) on x86_64. A PIE kernel can be relocated below the top 2G of the virtual address space. It allows to optionally extend the KASLR randomization range from 1G to 3G. Thanks a lot to Ard Biesheuvel & Kees Cook on their feedback on compiler changes, PIE support and KASLR in general. Thanks to

These patches make the changes necessary to build the kernel as Position Independent Executable (PIE) on x86_64. A PIE kernel can be relocated below the top 2G of the virtual address space. It allows to optionally extend the KASLR randomization range from 1G to 3G. Thanks a lot to Ard Biesheuvel & Kees Cook on their feedback on compiler changes, PIE support and KASLR in general. Thanks to

...mp; len >= VHOST_GOODCOPY_LEN - && (nvq->upend_idx + 1) % UIO_MAXIOV != - nvq->done_idx + && !vhost_exceeds_maxpend(net) && vhost_net_tx_select_zcopy(net); /* use msg_control to pass vhost zerocopy ubuf info to skb */ -- 2.14.2.920.gcf0c67979c-goog

...mp; len >= VHOST_GOODCOPY_LEN - && (nvq->upend_idx + 1) % UIO_MAXIOV != - nvq->done_idx + && !vhost_exceeds_maxpend(net) && vhost_net_tx_select_zcopy(net); /* use msg_control to pass vhost zerocopy ubuf info to skb */ -- 2.14.2.920.gcf0c67979c-goog

...eturn(unsigned long self_addr, unsigned long *parent, diff --git a/arch/x86/kernel/module.lds b/arch/x86/kernel/module.lds new file mode 100644 index 000000000000..fd6e95a4b454 --- /dev/null +++ b/arch/x86/kernel/module.lds @@ -0,0 +1,3 @@ +SECTIONS { + .got (NOLOAD) : { BYTE(0) } +} -- 2.14.2.920.gcf0c67979c-goog