linux.git/include/linux/kprobes.h, branch v5.1-rc2

x86/hw_breakpoints, kprobes: Remove kprobes ifdeffery

2019-01-30T10:52:21+00:00

Remove the ifdeffery in the breakpoint parsing arch_build_bp_info() by
adding a within_kprobe_blacklist() stub for the !CONFIG_KPROBES case.

It is returning true when kprobes are not enabled to mean that any
address is within the kprobes blacklist on such kernels and thus not
allow kernel breakpoints on non-kprobes kernels.

Signed-off-by: Borislav Petkov 
Acked-by: Masami Hiramatsu 
Cc: Anil S Keshavamurthy 
Cc: "David S. Miller" 
Cc: Frederic Weisbecker 
Cc: "H. Peter Anvin" 
Cc: Ingo Molnar 
Cc: "Naveen N. Rao" 
Cc: Thomas Gleixner 
Link: https://lkml.kernel.org/r/20190127131237.4557-1-bp@alien8.de

Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2018-12-27T01:03:51+00:00

Pull x86 cleanups from Ingo Molnar:
 "Misc cleanups"

* 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/kprobes: Remove trampoline_handler() prototype
  x86/kernel: Fix more -Wmissing-prototypes warnings
  x86: Fix various typos in comments
  x86/headers: Fix -Wmissing-prototypes warning
  x86/process: Avoid unnecessary NULL check in get_wchan()
  x86/traps: Complete prototype declarations
  x86/mce: Fix -Wmissing-prototypes warnings
  x86/gart: Rewrite early_gart_iommu_check() comment

kprobes: Blacklist symbols in arch-defined prohibited area

2018-12-17T16:48:38+00:00

Blacklist symbols in arch-defined probe-prohibited areas.
With this change, user can see all symbols which are prohibited
to probe in debugfs.

All archtectures which have custom prohibit areas should define
its own arch_populate_kprobe_blacklist() function, but unless that,
all symbols marked __kprobes are blacklisted.

Reported-by: Andrea Righi 
Tested-by: Andrea Righi 
Signed-off-by: Masami Hiramatsu 
Cc: Andy Lutomirski 
Cc: Anil S Keshavamurthy 
Cc: Borislav Petkov 
Cc: David S. Miller 
Cc: Linus Torvalds 
Cc: Naveen N. Rao 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Cc: Yonghong Song 
Link: http://lkml.kernel.org/r/154503485491.26176.15823229545155174796.stgit@devbox
Signed-off-by: Ingo Molnar

x86/kernel: Fix more -Wmissing-prototypes warnings

2018-12-08T11:24:35+00:00

... with the goal of eventually enabling -Wmissing-prototypes by
default. At least on x86.

Make functions static where possible, otherwise add prototypes or make
them visible through includes.

asm/trace/ changes courtesy of Steven Rostedt .

Signed-off-by: Borislav Petkov 
Reviewed-by: Masami Hiramatsu 
Reviewed-by: Ingo Molnar 
Acked-by: Rafael J. Wysocki  # ACPI + cpufreq bits
Cc: Andrew Banman 
Cc: Dimitri Sivanich 
Cc: "H. Peter Anvin" 
Cc: Ingo Molnar 
Cc: Masami Hiramatsu 
Cc: Mike Travis 
Cc: "Steven Rostedt (VMware)" 
Cc: Thomas Gleixner 
Cc: Yi Wang 
Cc: linux-acpi@vger.kernel.org

kprobes: Remove jprobe stub API

2018-06-21T10:33:21+00:00

Remove jprobe stub APIs from linux/kprobes.h since
the jprobe implementation was completely gone.

Signed-off-by: Masami Hiramatsu 
Acked-by: Thomas Gleixner 
Cc: Ananth N Mavinakayanahalli 
Cc: Andrew Morton 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Steven Rostedt 
Cc: linux-arch@vger.kernel.org
Link: https://lore.kernel.org/lkml/152942503572.15209.1652552217914694917.stgit@devbox
Signed-off-by: Ingo Molnar

kprobes: Remove jprobe API implementation

2018-06-21T10:33:05+00:00

Remove functionally empty jprobe API implementations and test cases.

Signed-off-by: Masami Hiramatsu 
Acked-by: Thomas Gleixner 
Cc: Ananth N Mavinakayanahalli 
Cc: Andrew Morton 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Steven Rostedt 
Cc: linux-arch@vger.kernel.org
Link: https://lore.kernel.org/lkml/152942430705.15209.2307050500995264322.stgit@devbox
Signed-off-by: Ingo Molnar

kprobes: Don't spam the build log with deprecation warnings

2017-11-13T07:00:52+00:00

The jprobes APIs are deprecated - but are still in occasional use for code that
few people seem to care about, so stop generating deprecation warnings.

Cc: Masami Hiramatsu 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar

kprobes: Disable the jprobes APIs

2017-10-20T09:02:29+00:00

Disable the jprobes APIs and comment out the jprobes API function
code. This is in preparation of removing all jprobes related
code (including kprobe's break_handler).

Nowadays ftrace and other tracing features are mature enough
to replace jprobes use-cases. Users can safely use ftrace and
perf probe etc. for their use cases.

Signed-off-by: Masami Hiramatsu 
Cc: Alexei Starovoitov 
Cc: Ananth N Mavinakayanahalli 
Cc: Anil S Keshavamurthy 
Cc: David S . Miller 
Cc: Ian McDonald 
Cc: Kees Cook 
Cc: Linus Torvalds 
Cc: Paul E . McKenney 
Cc: Peter Zijlstra 
Cc: Stephen Hemminger 
Cc: Steven Rostedt 
Cc: Thomas Gleixner 
Cc: Vlad Yasevich 
Link: http://lkml.kernel.org/r/150724527741.5014.15465541485637899227.stgit@devbox
Signed-off-by: Ingo Molnar

kprobes: Rename [arch_]function_offset_within_entry() to [arch_]kprobe_on_func_entry()

2017-07-08T09:05:34+00:00

Rename function_offset_within_entry() to scope it to kprobe namespace by
using kprobe_ prefix, and to also simplify it.

Suggested-by: Ingo Molnar 
Suggested-by: Masami Hiramatsu 
Signed-off-by: Naveen N. Rao 
Cc: Ananth N Mavinakayanahalli 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/3aa6c7e2e4fb6e00f3c24fa306496a66edb558ea.1499443367.git.naveen.n.rao@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar

tracing/kprobes: Enforce kprobes teardown after testing

2017-05-18T01:50:27+00:00

Enabling the tracer selftest triggers occasionally the warning in
text_poke(), which warns when the to be modified page is not marked
reserved.

The reason is that the tracer selftest installs kprobes on functions marked
__init for testing. These probes are removed after the tests, but that
removal schedules the delayed kprobes_optimizer work, which will do the
actual text poke. If the work is executed after the init text is freed,
then the warning triggers. The bug can be reproduced reliably when the work
delay is increased.

Flush the optimizer work and wait for the optimizing/unoptimizing lists to
become empty before returning from the kprobes tracer selftest. That
ensures that all operations which were queued due to the probes removal
have completed.

Link: http://lkml.kernel.org/r/20170516094802.76a468bb@gandalf.local.home

Signed-off-by: Thomas Gleixner 
Acked-by: Masami Hiramatsu 
Cc: stable@vger.kernel.org
Fixes: 6274de498 ("kprobes: Support delayed unoptimizing")
Signed-off-by: Steven Rostedt (VMware)