Vasily Gorbik d1befa6582 s390/vdso: avoid 64-bit vdso mapping for compat tasks ... vdso_fault used is_compat_task function (on s390 it tests "current" thread_info flags) to distinguish compat tasks and map 31-bit vdso pages. But "current" task might not correspond to mm context. When 31-bit compat inferior is executed under gdb, gdb does PTRACE_PEEKTEXT on vdso page, causing vdso_fault with "current" being 64-bit gdb process. So, 31-bit inferior ends up with 64-bit vdso mapped. To avoid this problem a new compat_mm flag has been introduced into mm context. This flag is used in vdso_fault and vdso_mremap instead of is_compat_task. Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>		2018-09-20 13:20:29 +02:00
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asm	s390/vdso: avoid 64-bit vdso mapping for compat tasks	2018-09-20 13:20:29 +02:00
uapi/asm	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux	2018-08-24 09:31:34 -07:00