lkml.org 
[lkml]   [2019]   [Dec]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 4.19 129/321] kprobes/x86: Show x86-64 specific blacklisted symbols correctly
    Date
    From: Masami Hiramatsu <mhiramat@kernel.org>

    [ Upstream commit fe6e65615415987629a2dda583b4495677d8c388 ]

    Show x86-64 specific blacklisted symbols in debugfs.

    Since x86-64 prohibits probing on symbols which are in
    entry text, those should be shown.

    Tested-by: Andrea Righi <righi.andrea@gmail.com>
    Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
    Cc: Andy Lutomirski <luto@kernel.org>
    Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
    Cc: Borislav Petkov <bp@alien8.de>
    Cc: David S. Miller <davem@davemloft.net>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Yonghong Song <yhs@fb.com>
    Link: http://lkml.kernel.org/r/154503488425.26176.17136784384033608516.stgit@devbox
    Signed-off-by: Ingo Molnar <mingo@kernel.org>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    arch/x86/kernel/kprobes/core.c | 6 ++++++
    1 file changed, 6 insertions(+)

    diff --git a/arch/x86/kernel/kprobes/core.c b/arch/x86/kernel/kprobes/core.c
    index e83a057564d1b..173e915e11d54 100644
    --- a/arch/x86/kernel/kprobes/core.c
    +++ b/arch/x86/kernel/kprobes/core.c
    @@ -1140,6 +1140,12 @@ bool arch_within_kprobe_blacklist(unsigned long addr)
    is_in_entry_trampoline_section;
    }

    +int __init arch_populate_kprobe_blacklist(void)
    +{
    + return kprobe_add_area_blacklist((unsigned long)__entry_text_start,
    + (unsigned long)__entry_text_end);
    +}
    +
    int __init arch_init_kprobes(void)
    {
    return 0;
    --
    2.20.1


    \
     
     \ /
      Last update: 2019-12-04 00:04    [W:4.094 / U:0.040 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site