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linux-next/arch
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Andy Lutomirski d5c678aed5 x86/debug: Allow a single level of #DB recursion 
Trying to clear DR7 around a #DB from usermode malfunctions if the tasks
schedules when delivering SIGTRAP.

Rather than trying to define a special no-recursion region, just allow a
single level of recursion.  The same mechanism is used for NMI, and it
hasn't caused any problems yet.

Fixes: 9f58fdde95c9 ("x86/db: Split out dr6/7 handling")
Reported-by: Kyle Huey <me@kylehuey.com>
Debugged-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Daniel Thompson <daniel.thompson@linaro.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/8b9bd05f187231df008d48cf818a6a311cbd5c98.1597882384.git.luto@kernel.org
Link: https://lore.kernel.org/r/20200902133200.726584153@infradead.org
2020-09-04 15:09:29 +02:00
..
alpha
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
arc
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
arm
A set of fixes for lockdep, tracing and RCU:
2020-08-30 11:43:50 -07:00
arm64
MMC host:
2020-08-31 11:22:57 -07:00
c6x
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
csky
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
h8300
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
hexagon
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
ia64
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
m68k
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
microblaze
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
mips
A set of fixes for lockdep, tracing and RCU:
2020-08-30 11:43:50 -07:00
nds32
A set of fixes for lockdep, tracing and RCU:
2020-08-30 11:43:50 -07:00
nios2
mm/nios2: use general page fault accounting
2020-08-12 10:58:03 -07:00
openrisc
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
parisc
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
powerpc
A set of fixes for lockdep, tracing and RCU:
2020-08-30 11:43:50 -07:00
riscv
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
s390
A set of fixes for lockdep, tracing and RCU:
2020-08-30 11:43:50 -07:00
sh
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
sparc
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
um
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
x86
x86/debug: Allow a single level of #DB recursion
2020-09-04 15:09:29 +02:00
xtensa
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
.gitignore
.gitignore: add SPDX License Identifier
2020-03-25 11:50:48 +01:00
Kconfig
A set oftimekeeping/VDSO updates:
2020-08-14 14:26:08 -07:00