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| author | Mark Brown <broonie@kernel.org> | 2016-07-29 21:38:37 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-07-29 21:38:37 +0100 |
| commit | da9a92f0cde9ce34a930d7edcaef30429e41d14a (patch) | |
| tree | 44095fbc8f83990330437d11c7a9fc699a5e2521 /arch/x86/kernel/kprobes/core.c | |
| parent | aa6b4960f4571ecc422a13b2490e91f5debb64a1 (diff) | |
| parent | b0ba6b0a5eb2b51037a07dbf5a7470ca804d575c (diff) | |
Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-androidlsk-v4.4-16.07-android
Diffstat (limited to 'arch/x86/kernel/kprobes/core.c')
| -rw-r--r-- | arch/x86/kernel/kprobes/core.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/kernel/kprobes/core.c b/arch/x86/kernel/kprobes/core.c index 1deffe6cc873..023c442c33bb 100644 --- a/arch/x86/kernel/kprobes/core.c +++ b/arch/x86/kernel/kprobes/core.c @@ -959,7 +959,19 @@ int kprobe_fault_handler(struct pt_regs *regs, int trapnr) * normal page fault. */ regs->ip = (unsigned long)cur->addr; + /* + * Trap flag (TF) has been set here because this fault + * happened where the single stepping will be done. + * So clear it by resetting the current kprobe: + */ + regs->flags &= ~X86_EFLAGS_TF; + + /* + * If the TF flag was set before the kprobe hit, + * don't touch it: + */ regs->flags |= kcb->kprobe_old_flags; + if (kcb->kprobe_status == KPROBE_REENTER) restore_previous_kprobe(kcb); else |