+static int ptrace_rw_siginfo(struct task_struct *tracee,
+ struct ptrace_context *context,
+ siginfo_t *info, bool write)
+{
+ unsigned long flags;
+ siginfo_t *context_info;
+ int err = -ESRCH;
+
+ if
I don't think this can work. context-siginfo can be cleared and then
set again in between. If we race with SIGKILL, utrace_get_signal()
can dequeue another signal != SIGKILL and start the reporting loop.
That's not supposed to be possible. See sigset_t sigkill_only; et al.
I guess it is
A separate patch to discuss the comments/naming.
Introduce the new helper, ptrace_rw_siginfo(), to access context-siginfo.
It assumes the tracee must have the valid -siginfo != NULL unless we race
with SIGKILL, see the next patches.
---
kernel/ptrace.c | 37
