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| author |   Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> | 2013-05-22 08:34:13 +0000 |
|---|---|---|
| committer |   Ralf Baechle <ralf@linux-mips.org> | 2013-05-22 12:48:30 +0200 |
| commit | 22047b85170280b0ca59ce4befd0fa1f71a4ec16 (patch) | |
| tree | f8f8c3c0cea02ab234d353e4a29315f292ded065 /arch | |
| parent | MIPS: Idle: Break r4k_wait into two functions and fix it. (diff) | |
| download | linux-dev-22047b85170280b0ca59ce4befd0fa1f71a4ec16.tar.xz linux-dev-22047b85170280b0ca59ce4befd0fa1f71a4ec16.zip | |
kprobes/mips: Fix to check double free of insn slot
Fix to check double free of insn_slot at arch_remove_kprobe
as other arches do.
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: David Daney <ddaney@caviumnetworks.com>
Cc: Maneesh Soni <manesoni@cisco.com>
Cc: Victor Kamensky <kamensky@cisco.com>
Cc: linux-mips@linux-mips.org
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: yrl.pp-manager.tt@hitachi.com
Cc: systemtap@sourceware.org
Patchwork: https://patchwork.linux-mips.org/patch/5293/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/kernel/kprobes.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/mips/kernel/kprobes.c b/arch/mips/kernel/kprobes.c index 12bc4ebdf55b..1f8187ab0997 100644 --- a/arch/mips/kernel/kprobes.c +++ b/arch/mips/kernel/kprobes.c @@ -207,7 +207,10 @@ void __kprobes arch_disarm_kprobe(struct kprobe *p) void __kprobes arch_remove_kprobe(struct kprobe *p) { - free_insn_slot(p->ainsn.insn, 0); + if (p->ainsn.insn) { + free_insn_slot(p->ainsn.insn, 0); + p->ainsn.insn = NULL; + } } static void save_previous_kprobe(struct kprobe_ctlblk *kcb) |