Commit eaec2b0b authored Mar 30, 2020 by Zhiqiang Liu Committed by Christian Brauner Apr 12, 2020

signal: check sig before setting info in kill_pid_usb_asyncio



In kill_pid_usb_asyncio, if signal is not valid, we do not need to
set info struct.

Signed-off-by: Zhiqiang Liu <liuzhiqiang26@huawei.com>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Link: https://lore.kernel.org/r/f525fd08-1cf7-fb09-d20c-4359145eb940@huawei.com


Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

parent 8f3d9f35

kernel/signal.c

+3 −3

Original line number	Diff line number	Diff line
		@@ -1510,15 +1510,15 @@ int kill_pid_usb_asyncio(int sig, int errno, sigval_t addr,
		unsigned long flags;
		int ret = -EINVAL;

		if (!valid_signal(sig))
		return ret;

		clear_siginfo(&info);
		info.si_signo = sig;
		info.si_errno = errno;
		info.si_code = SI_ASYNCIO;
		((sigval_t )&info.si_pid) = addr;

		if (!valid_signal(sig))
		return ret;

		rcu_read_lock();
		p = pid_task(pid, PIDTYPE_PID);
		if (!p) {

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