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authorOleg Nesterov <[email protected]>2017-08-15 17:39:52 +0200
committerThomas Gleixner <[email protected]>2017-08-16 20:32:01 +0200
commit47ac5484fd961420e5ec0bb5b972fde381f57365 (patch)
treec18c896db669c488159a0ad412dc999931127346 /tools/perf/scripts/python/export-to-postgresql.py
parent84393817db09bb436e934f8f8cc981cbca9ea4dc (diff)
x86: Fix norandmaps/ADDR_NO_RANDOMIZE
Documentation/admin-guide/kernel-parameters.txt says: norandmaps Don't use address space randomization. Equivalent to echo 0 > /proc/sys/kernel/randomize_va_space but it doesn't work because arch_rnd() which is used to randomize mm->mmap_base returns a random value unconditionally. And as Kirill pointed out, ADDR_NO_RANDOMIZE is broken by the same reason. Just shift the PF_RANDOMIZE check from arch_mmap_rnd() to arch_rnd(). Fixes: 1b028f784e8c ("x86/mm: Introduce mmap_compat_base() for 32-bit mmap()") Signed-off-by: Oleg Nesterov <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Acked-by: Kirill A. Shutemov <[email protected]> Acked-by: Cyrill Gorcunov <[email protected]> Reviewed-by: Dmitry Safonov <[email protected]> Cc: [email protected] Cc: Andy Lutomirski <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Linus Torvalds <[email protected]> Link: http://lkml.kernel.org/r/[email protected]
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