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| author |   Kees Cook <keescook@chromium.org> | 2021-09-29 15:02:14 -0700 |
|---|---|---|
| committer |   Peter Zijlstra <peterz@infradead.org> | 2021-10-15 11:25:14 +0200 |
| commit | 42a20f86dc19f9282d974df0ba4d226c865ab9dd (patch) | |
| tree | 548e09e31785a53f7907e0e4c28471d0e53fcbb5 /arch/sparc/kernel/process_64.c | |
| parent | x86: Fix get_wchan() to support the ORC unwinder (diff) | |
| download | wireguard-linux-42a20f86dc19f9282d974df0ba4d226c865ab9dd.tar.xz wireguard-linux-42a20f86dc19f9282d974df0ba4d226c865ab9dd.zip | |
sched: Add wrapper for get_wchan() to keep task blocked
Having a stable wchan means the process must be blocked and for it to
stay that way while performing stack unwinding.
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> [arm]
Tested-by: Mark Rutland <mark.rutland@arm.com> [arm64]
Link: https://lkml.kernel.org/r/20211008111626.332092234@infradead.org
Diffstat (limited to 'arch/sparc/kernel/process_64.c')
| -rw-r--r-- | arch/sparc/kernel/process_64.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/arch/sparc/kernel/process_64.c b/arch/sparc/kernel/process_64.c index d1cc410d2f64..f5b2cac8669f 100644 --- a/arch/sparc/kernel/process_64.c +++ b/arch/sparc/kernel/process_64.c @@ -663,7 +663,7 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) return 0; } -unsigned long get_wchan(struct task_struct *task) +unsigned long __get_wchan(struct task_struct *task) { unsigned long pc, fp, bias = 0; struct thread_info *tp; @@ -671,9 +671,6 @@ unsigned long get_wchan(struct task_struct *task) unsigned long ret = 0; int count = 0; - if (!task || task == current || task_is_running(task)) - goto out; - tp = task_thread_info(task); bias = STACK_BIAS; fp = task_thread_info(task)->ksp + bias; |