diff options
| author | Mark Brown <broonie@linaro.org> | 2014-01-14 14:14:47 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2014-01-14 14:14:47 +0000 |
| commit | 13ea3300100ec3461560b1e061033cd167333a86 (patch) | |
| tree | c60a016a06c488adada6959516e2a2de96d6d7d3 /arch/arm/kernel/process.c | |
| parent | b7ed6b88b2a5e961eeb939ef637a3cbb435a23a7 (diff) | |
| parent | 68e67d97e1f91ed11e041b67f3a1336f518c608f (diff) | |
Merge branch 'topic/rcar' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into spi-rspi
Diffstat (limited to 'arch/arm/kernel/process.c')
| -rw-r--r-- | arch/arm/kernel/process.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c index 94f6b05f9e2..92f7b15dd22 100644 --- a/arch/arm/kernel/process.c +++ b/arch/arm/kernel/process.c @@ -404,6 +404,7 @@ EXPORT_SYMBOL(dump_fpu); unsigned long get_wchan(struct task_struct *p) { struct stackframe frame; + unsigned long stack_page; int count = 0; if (!p || p == current || p->state == TASK_RUNNING) return 0; @@ -412,9 +413,11 @@ unsigned long get_wchan(struct task_struct *p) frame.sp = thread_saved_sp(p); frame.lr = 0; /* recovered from the stack */ frame.pc = thread_saved_pc(p); + stack_page = (unsigned long)task_stack_page(p); do { - int ret = unwind_frame(&frame); - if (ret < 0) + if (frame.sp < stack_page || + frame.sp >= stack_page + THREAD_SIZE || + unwind_frame(&frame) < 0) return 0; if (!in_sched_functions(frame.pc)) return frame.pc; |