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signal: check sig before setting info in kill_pid_usb_asyncio

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[ Upstream commit eaec2b0bd30690575c581eebffae64bfb7f684ac ]

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

Signed-off-by: Zhiqiang Liu <[email protected]>
Acked-by: Christian Brauner <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Christian Brauner <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
This commit is contained in:
Zhiqiang Liu 2020-03-30 10:18:33 +08:00 • committed by Greg Kroah-Hartman
commit 16976275b9
1 changed files with 3 additions and 3 deletions
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6
kernel/signal.c
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@ -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) {