linux

mirror of https://github.com/FEX-Emu/linux.git synced 2025-02-11 14:26:34 +00:00

History

Martin Schwidefsky a9809407f6 s390/mm: fix vunmap vs finish_arch_post_lock_switch

The vunmap_pte_range() function calls ptep_get_and_clear() without any
locking. ptep_get_and_clear() uses ptep_xchg_lazy()/ptep_flush_direct()
for the page table update. ptep_flush_direct requires that preemption
is disabled, but without any locking this is not the case. If the kernel
preempts the task while the attach_counter is increased an endless loop
in finish_arch_post_lock_switch() will occur the next time the task is
scheduled.

Add explicit preempt_disable()/preempt_enable() calls to the relevant
functions in arch/s390/mm/pgtable.c.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

2016-06-13 15:58:21 +02:00

cmm.c

…

dump_pagetables.c

s390/pgtable: get rid of _REGION3_ENTRY_RO

2016-06-13 15:58:14 +02:00

extmem.c

s390: Use pr_warn instead of pr_warning

2016-03-07 13:12:04 +01:00

fault.c

s390: fix info leak in do_sigsegv

2016-05-23 16:45:25 +02:00