AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/arch/x86
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Josh Poimboeuf a8b7a92318 x86/unwind: Silence entry-related warnings 
A few people have reported unwinder warnings like the following:

  WARNING: kernel stack frame pointer at ffffc90000fe7ff0 in rsync:1157 has bad value           (null)
  unwind stack type:0 next_sp:          (null) mask:2 graph_idx:0
  ffffc90000fe7f98: ffffc90000fe7ff0 (0xffffc90000fe7ff0)
  ffffc90000fe7fa0: ffffffffb7000f56 (trace_hardirqs_off_thunk+0x1a/0x1c)
  ffffc90000fe7fa8: 0000000000000246 (0x246)
  ffffc90000fe7fb0: 0000000000000000 ...
  ffffc90000fe7fc0: 00007ffe3af639bc (0x7ffe3af639bc)
  ffffc90000fe7fc8: 0000000000000006 (0x6)
  ffffc90000fe7fd0: 00007f80af433fc5 (0x7f80af433fc5)
  ffffc90000fe7fd8: 00007ffe3af638e0 (0x7ffe3af638e0)
  ffffc90000fe7fe0: 00007ffe3af638e0 (0x7ffe3af638e0)
  ffffc90000fe7fe8: 00007ffe3af63970 (0x7ffe3af63970)
  ffffc90000fe7ff0: 0000000000000000 ...
  ffffc90000fe7ff8: ffffffffb7b74b9a (entry_SYSCALL_64_after_swapgs+0x17/0x4f)

This warning can happen when unwinding a code path where an interrupt
occurred in x86 entry code before it set up the first stack frame.
Silently ignore any warnings for this case.

Reported-by: Daniel Borkmann <daniel@iogearbox.net>
Reported-by: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Fixes: c32c47c68a ("x86/unwind: Warn on bad frame pointer")
Link: http://lkml.kernel.org/r/dbd6838826466a60dc23a52098185bc973ce2f1e.1492020577.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-04-14 10:20:06 +02:00
..
boot Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-02-20 14:04:37 -08:00
configs x86/build/x86_64_defconfig: Enable CONFIG_R8169 2017-03-06 11:47:43 +01:00
crypto crypto: sha512-mb - Protect sha512 mb ctx mgr access 2017-02-11 17:50:41 +08:00
entry x86/ftrace: Move the ftrace specific code out of entry_32.S 2017-03-24 10:14:07 +01:00
events Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-03-17 13:59:52 -07:00
hyperv x86/hyperv: Hide unused label 2017-03-01 10:51:40 +01:00
ia32 sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h> 2017-03-02 08:42:36 +01:00
include x86/unwind: Silence entry-related warnings 2017-04-14 10:20:06 +02:00
kernel x86/unwind: Silence entry-related warnings 2017-04-14 10:20:06 +02:00
kvm KVM: nVMX: do not warn when MSR bitmap address is not backed 2017-03-09 15:34:51 +01:00
lguest clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
lib x86/asm: Optimize clear_page() 2017-03-07 08:28:00 +01:00
math-emu Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
mm x86/mpx: Make unnecessarily global function static 2017-03-16 09:17:05 +01:00
net bpf: fix unlocking of jited image when module ronx not set 2017-02-21 13:30:14 -05:00
oprofile x86/oprofile/nmi: Convert to hotplug state machine 2016-11-22 23:34:43 +01:00
pci features and fixes for 4.11 rc1 2017-03-09 12:23:30 -08:00
platform x86/platform/intel-mid: Add power button support for Merrifield 2017-03-13 22:08:28 +01:00
power Merge branch 'x86-timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-12-18 13:59:10 -08:00
purgatory kexec, x86/purgatory: Unbreak it and clean it up 2017-03-10 20:55:09 +01:00
ras x86/ras/amd/inj: Change dependency 2017-01-24 09:14:55 +01:00
realmode x86/build: Don't use $(LINUXINCLUDE) twice 2016-11-28 07:49:17 +01:00
tools x86/tools: Fix gcc-7 warning in relocs.c 2016-12-19 11:50:24 +01:00
um x86/debug: Implement __WARN() using UD0 2017-03-27 10:20:28 +02:00
video
xen sched/headers: Prepare to remove the <linux/mm_types.h> dependency from <linux/sched.h> 2017-03-02 08:42:37 +01:00
.gitignore
Kbuild Drivers: hv vmbus: Move Hypercall page setup out of common code 2017-01-19 11:42:07 +01:00
Kconfig x86/ftrace: Add -mfentry support to x86_32 with DYNAMIC_FTRACE set 2017-03-24 10:14:07 +01:00
Kconfig.cpu
Kconfig.debug mm: add arch-independent testcases for RODATA 2017-02-27 18:43:48 -08:00
Makefile
Makefile_32.cpu
Makefile.um