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linux/arch/arc
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Vineet Gupta 2387ae5715 ARC: mm: allow mprotect to make stack mappings executable 
commit 93312b6da4 upstream.

mprotect(EXEC) was failing for stack mappings as default vm flags was
missing MAYEXEC.

This was triggered by glibc test suite nptl/tst-execstack testcase

What is surprising is that despite running LTP for years on, we didn't
catch this issue as it lacks a directed test case.

gcc dejagnu tests with nested functions also requiring exec stack work
fine though because they rely on the GNU_STACK segment spit out by
compiler and handled in kernel elf loader.

This glibc case is different as the stack is non exec to begin with and
a dlopen of shared lib with GNU_STACK segment triggers the exec stack
proceedings using a mprotect(PROT_EXEC) which was broken.

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
History 2018-11-20 18:05:39 +00:00
..
boot ARC: [nsimosci] move peripherals to match model to FPGA 2015-01-15 10:44:08 +00:00
configs ARC: [nsimosci] Unbork console 2014-04-05 18:36:51 +05:30
include ARC: mm: allow mprotect to make stack mappings executable 2018-11-20 18:05:39 +00:00
kernel ARC: Re-enable MMU upon Machine Check exception 2017-11-26 13:50:29 +00:00
lib ARC: switch to generic ENTRY/END assembler annotations 2014-03-26 14:31:28 +05:30
mm ARC: Re-enable MMU upon Machine Check exception 2017-11-26 13:50:29 +00:00
oprofile ARC: OProfile support 2013-02-15 23:16:00 +05:30
plat-arcfpga ARC: [arcfpga] Early ARC UART to be only activated by cmdline 2014-06-03 14:20:09 +05:30
plat-tb10x ARC: [TB10x] Updates for GPIO and pinctrl 2013-11-11 09:57:44 +05:30
Kbuild ARC: Build system: Makefiles, Kconfig, Linker script 2013-02-11 20:00:25 +05:30
Kconfig Kconfig: rename HAS_IOPORT to HAS_IOPORT_MAP 2014-04-07 16:36:11 -07:00
Kconfig.debug consolidate per-arch stack overflow debugging options 2013-07-04 11:25:39 -07:00
Makefile ARC: unwind: ensure that .debug_frame is generated (vs. .eh_frame) 2016-08-22 22:38:22 +01:00