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OpenCloudOS-Kernel
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Masami Hiramatsu 0eae81dc9f x86/kprobes: Prohibit probing on IRQ handlers directly 
Prohibit probing on IRQ handlers in irqentry_text because
if it interrupts user mode, at that point we haven't changed
to kernel space yet and which eventually leads a double fault.
E.g.

 # echo p apic_timer_interrupt > kprobe_events
 # echo 1 > events/kprobes/enable
 PANIC: double fault, error_code: 0x0
 CPU: 1 PID: 814 Comm: less Not tainted 4.20.0-rc3+ #30
 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)
 RIP: 0010:error_entry+0x12/0xf0
 [snip]
 Call Trace:
  <ENTRY_TRAMPOLINE>
  ? native_iret+0x7/0x7
  ? async_page_fault+0x8/0x30
  ? trace_hardirqs_on_thunk+0x1c/0x1c
  ? error_entry+0x7c/0xf0
  ? async_page_fault+0x8/0x30
  ? native_iret+0x7/0x7
  ? int3+0xa/0x20
  ? trace_hardirqs_on_thunk+0x1c/0x1c
  ? error_entry+0x7c/0xf0
  ? int3+0xa/0x20
  ? apic_timer_interrupt+0x1/0x20
  </ENTRY_TRAMPOLINE>
 Kernel panic - not syncing: Machine halted.
 Kernel Offset: disabled
 ---[ end Kernel panic - not syncing: Machine halted. ]---

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andrea Righi <righi.andrea@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/154998796400.31052.8406236614820687840.stgit@devbox
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 		2019-02-13 08:16:39 +01:00
..
alpha perf/core, arch/alpha: Strengthen exclusion checks with PERF_PMU_CAP_NO_EXCLUDE 2019-01-21 11:01:21 +01:00
arc ARCv2: lib: memeset: fix doing prefetchw outside of buffer 2019-01-17 16:24:39 -08:00
arm Merge branch 'perf/urgent' into perf/core, to pick up fixes 2019-02-04 08:45:42 +01:00
arm64 arm64: hibernate: Clean the __hyp_text to PoC after resume 2019-02-01 14:10:02 +00:00
c6x arch: unexport asm/shmparam.h for all architectures 2019-02-01 15:46:22 -08:00
csky csky: fixup compile error with CPU 810. 2019-01-10 04:37:37 -08:00
h8300 arch: unexport asm/shmparam.h for all architectures 2019-02-01 15:46:22 -08:00
hexagon arch: unexport asm/shmparam.h for all architectures 2019-02-01 15:46:22 -08:00
ia64 ia64: remove redundant 'export AWK' 2019-01-16 23:31:18 +09:00
m68k arch: unexport asm/shmparam.h for all architectures 2019-02-01 15:46:22 -08:00
microblaze arch: unexport asm/shmparam.h for all architectures 2019-02-01 15:46:22 -08:00
mips A few MIPS fixes for 5.0: 2019-01-20 10:33:18 +12:00
nds32 nds32: remove unneeded code in arch/nds32/Makefile 2019-01-17 23:42:37 +09:00
nios2 arch: remove redundant UAPI generic-y defines 2019-01-06 10:22:15 +09:00
openrisc arch: unexport asm/shmparam.h for all architectures 2019-02-01 15:46:22 -08:00
parisc arch: remove redundant UAPI generic-y defines 2019-01-06 10:22:15 +09:00
powerpc Merge branch 'perf/urgent' into perf/core, to pick up fixes 2019-02-04 08:45:42 +01:00
riscv riscv: Adjust mmap base address at a third of task size 2019-01-25 10:50:53 -08:00
s390 perf/aux: Make perf_event accessible to setup_aux() 2019-02-06 10:00:39 -03:00
sh Kbuild late updates for v4.21 2019-01-06 16:33:10 -08:00
sparc arch: remove redundant UAPI generic-y defines 2019-01-06 10:22:15 +09:00
um Merge branch 'akpm' (patches from Andrew) 2019-01-05 09:16:18 -08:00
unicore32 arch: unexport asm/shmparam.h for all architectures 2019-02-01 15:46:22 -08:00
x86 x86/kprobes: Prohibit probing on IRQ handlers directly 2019-02-13 08:16:39 +01:00
xtensa xtensa: SMP: limit number of possible CPUs by NR_CPUS 2019-01-27 10:04:30 -08:00
.gitignore
…
Kconfig jump_label: move 'asm goto' support test to Kconfig 2019-01-06 09:46:51 +09:00