Josh Poimboeuf 325cdacd03 debug: Fix WARN_ON_ONCE() for modules ... Mike Galbraith reported a situation where a WARN_ON_ONCE() call in DRM code turned into an oops. As it turns out, WARN_ON_ONCE() seems to be completely broken when called from a module. The bug was introduced with the following commit: 19d436268d ("debug: Add _ONCE() logic to report_bug()") That commit changed WARN_ON_ONCE() to move its 'once' logic into the bug trap handler. It requires a writable bug table so that the BUGFLAG_DONE bit can be written to the flags to indicate the first warning has occurred. The bug table was made writable for vmlinux, which relies on vmlinux.lds.S and vmlinux.lds.h for laying out the sections. However, it wasn't made writable for modules, which rely on the ELF section header flags. Reported-by: Mike Galbraith <efault@gmx.de> Tested-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: 19d436268d ("debug: Add _ONCE() logic to report_bug()") Link: http://lkml.kernel.org/r/a53b04235a65478dd9afc51f5b329fdc65c84364.1500095401.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>		2017-07-20 12:31:04 +02:00
..
boot	ARM: SoC fixes	2017-06-19 16:50:09 +08:00
configs	arm64: defconfig: enable some core options for 64bit Rockchip socs	2017-05-25 17:01:35 -07:00
crypto	Revert "crypto: arm64/sha - Add constant operand modifier to ASM_EXPORT"	2017-04-24 16:09:50 +08:00
include	debug: Fix WARN_ON_ONCE() for modules	2017-07-20 12:31:04 +02:00
kernel	Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-07-03 18:08:06 -07:00
kvm	arm64: KVM: Allow unaligned accesses at EL2	2017-06-06 22:20:02 +02:00
lib	arm64: switch to RAW_COPY_USER	2017-03-28 18:23:24 -04:00
mm	IOMMU Updates for Linux v4.12	2017-05-09 15:15:47 -07:00
net	bpf, arm64: use separate register for state in stxr	2017-06-07 15:27:20 -04:00
xen	xen/privcmd: Add IOCTL_PRIVCMD_DM_OP	2017-02-14 15:13:43 -05:00
Kconfig	Merge branch 'linus' into x86/mm, to pick up fixes	2017-06-22 10:57:28 +02:00
Kconfig.debug	arm64: relocation testing module	2017-04-04 17:03:32 +01:00
Kconfig.platforms	clocksource/drivers: Rename CLKSRC_OF to TIMER_OF	2017-06-14 12:01:03 +02:00
Makefile	Kbuild misc updates for 4.12	2017-05-10 20:41:43 -07:00