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signal: check sig before setting info in kill_pid_usb_asyncio 

BugLink: https://bugs.launchpad.net/bugs/1876765

[ Upstream commit eaec2b0bd3 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
This commit is contained in:
Zhiqiang Liu 2020-03-30 10:18:33 +08:00 committed by Kleber Sacilotto de Souza
parent 1cb9d8739a
commit b2552c00d2
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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) {