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x86_64: fix kernel rodata NX setting 

Without CONFIG_DYNAMIC_FTRACE, mark_rodata_ro() would mark a wrong
number of pages as no-execute. The bug was introduced in the patch
"ftrace: dont write protect kernel text". The symptom was machine reboot
after a CPU hotplug.

Signed-off-by: Pekka Paalanen <pq@iki.fi>
Acked-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Pekka Paalanen 2008-05-12 21:21:01 +02:00 committed by Thomas Gleixner
parent 25b0b44a1c
commit 72b59d67f8
1 changed files with 1 additions and 1 deletions
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2
arch/x86/mm/init_64.c
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@ -782,7 +782,7 @@ void mark_rodata_ro(void)
* The rodata section (but not the kernel text!) should also be
* not-executable.
*/
set_memory_nx(rodata_start, (end - start) >> PAGE_SHIFT);
set_memory_nx(rodata_start, (end - rodata_start) >> PAGE_SHIFT);
rodata_test();