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x86/mm: Do verify W^X at boot up 

Straight up revert of commit:

  a970174d7a ("x86/mm: Do not verify W^X at boot up")

now that the root cause has been fixed.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20221025201058.011279208@infradead.org
This commit is contained in:
Peter Zijlstra 2022-10-25 21:39:43 +02:00 committed by Dave Hansen
parent eb7d389d5b
commit 414ebf148c
1 changed files with 0 additions and 4 deletions
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4
arch/x86/mm/pat/set_memory.c
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@ -587,10 +587,6 @@ static inline pgprot_t verify_rwx(pgprot_t old, pgprot_t new, unsigned long star
{ {
unsigned long end; unsigned long end;
/* Kernel text is rw at boot up */
if (system_state == SYSTEM_BOOTING)
return new;
/* /*
* 32-bit has some unfixable W+X issues, like EFI code * 32-bit has some unfixable W+X issues, like EFI code
* and writeable data being in the same page. Disable * and writeable data being in the same page. Disable