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
..
boards	clocksource/drivers: Rename CLKSRC_OF to TIMER_OF	2017-06-14 12:01:03 +02:00
boot	treewide: Remove remaining executable attributes from source files	2017-02-25 12:12:50 -08:00
cchips	genirq: Remove irq argument from irq flow handlers	2015-09-16 15:47:51 +02:00
configs	cpufreq: Remove CONFIG_CPU_FREQ_STAT_DETAILS config option	2017-02-03 23:59:39 +01:00
drivers	sh/PCI: Use generic pci_mmap_resource_range()	2017-04-20 08:47:47 -05:00
include	debug: Fix WARN_ON_ONCE() for modules	2017-07-20 12:31:04 +02:00
kernel	sched/headers: Move task_struct::signal and task_struct::sighand types and accessors into <linux/sched/signal.h>	2017-03-03 01:43:37 +01:00
lib	sh: New gcc support	2016-03-17 19:45:44 +00:00
lib64	sh64: Kill off old exception debugging helpers.	2012-06-14 14:12:18 +09:00
math-emu	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>	2017-03-02 08:42:29 +01:00
mm	mm: larger stack guard gap, between vmas	2017-06-19 21:50:20 +08:00
oprofile	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
tools
Kconfig	CONFIG_ARCH_HAS_RAW_COPY_USER is unconditional now	2017-04-26 12:11:01 -04:00
Kconfig.cpu	arch/sh: remove depends on CONFIG_EXPERIMENTAL	2013-01-21 14:43:13 -08:00
Kconfig.debug
Makefile	sh: Use full path in KBUILD_IMAGE definition	2017-03-20 22:42:20 +09:00