diff options
| author | Masami Hiramatsu <mhiramat@redhat.com> | 2007-12-18 20:05:58 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2007-12-18 20:05:58 +0300 |
| commit | 29b6cd794e73eea7600541d06288a09861ffecb0 (patch) | |
| tree | 7f915b756058acc89cf3e85b75dcce0ec60a9e12 /include/asm-x86 | |
| parent | b4be625852618636a6b54908c4f9d90fb29dc549 (diff) | |
| download | linux-29b6cd794e73eea7600541d06288a09861ffecb0.tar.xz | |
x86: jprobe bugfix
jprobe for x86-64 may cause kernel page fault when the jprobe_return()
is called from incorrect function.
- Use jprobe_saved_regs instead getting it from stack.
(Especially on x86-64, it may get incorrect data, because
pt_regs can not be get by using container_of(rsp))
- Change the type of stack pointer to unsigned long *.
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/asm-x86')
| -rw-r--r-- | include/asm-x86/kprobes_32.h | 2 | ||||
| -rw-r--r-- | include/asm-x86/kprobes_64.h | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/include/asm-x86/kprobes_32.h b/include/asm-x86/kprobes_32.h index b772d5b38685..9fe8f3bddfd5 100644 --- a/include/asm-x86/kprobes_32.h +++ b/include/asm-x86/kprobes_32.h @@ -73,7 +73,7 @@ struct kprobe_ctlblk { unsigned long kprobe_status; unsigned long kprobe_old_eflags; unsigned long kprobe_saved_eflags; - long *jprobe_saved_esp; + unsigned long *jprobe_saved_esp; struct pt_regs jprobe_saved_regs; kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE]; struct prev_kprobe prev_kprobe; diff --git a/include/asm-x86/kprobes_64.h b/include/asm-x86/kprobes_64.h index 53f4d8507354..743d76218fc9 100644 --- a/include/asm-x86/kprobes_64.h +++ b/include/asm-x86/kprobes_64.h @@ -66,7 +66,7 @@ struct kprobe_ctlblk { unsigned long kprobe_status; unsigned long kprobe_old_rflags; unsigned long kprobe_saved_rflags; - long *jprobe_saved_rsp; + unsigned long *jprobe_saved_rsp; struct pt_regs jprobe_saved_regs; kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE]; struct prev_kprobe prev_kprobe; |