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	kbuild: delete unnecessary "@:"	2016-04-20 10:36:57 +02:00
configs	arch/defconfig: remove CONFIG_RESOURCE_COUNTERS	2016-05-23 17:04:14 -07:00
include	debug: Fix WARN_ON_ONCE() for modules	2017-07-20 12:31:04 +02:00
kernel	arch: remove unused macro/function thread_saved_pc()	2017-06-28 16:13:57 -07:00
lib	mn10300: switch to RAW_COPY_USER	2017-03-28 18:23:49 -04:00
mm	sched/headers: Prepare to remove the <linux/mm_types.h> dependency from <linux/sched.h>	2017-03-02 08:42:37 +01:00
oprofile
proc-mn2ws0050	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
proc-mn103e010	mn10300: use RTC_DRV_CMOS instead of CONFIG_RTC	2016-06-26 01:20:08 +02:00
unit-asb2303	net: smc91x: isolate u16 writes alignment workaround	2016-10-18 14:14:21 -04:00
unit-asb2305	mn10300/PCI: Use generic pci_mmap_resource_range()	2017-04-20 08:47:47 -05:00
unit-asb2364	mn10300: Remove deprecated IRQF_DISABLED	2014-03-04 21:47:51 +01:00
Kconfig	CONFIG_ARCH_HAS_RAW_COPY_USER is unconditional now	2017-04-26 12:11:01 -04:00
Kconfig.debug	consolidate per-arch stack overflow debugging options	2013-07-04 11:25:39 -07:00
Makefile	mn10300: Remove redundant debugging info flag	2014-01-28 10:57:06 +01:00