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staging: android: ion: Switch from WARN to pr_warn 

commit e4e179a844 upstream.

Syzbot reported a warning with Ion:

WARNING: CPU: 0 PID: 3502 at drivers/staging/android/ion/ion-ioctl.c:73 ion_ioctl+0x2db/0x380 drivers/staging/android/ion/ion-ioctl.c:73
Kernel panic - not syncing: panic_on_warn set ...

This is a warning that validation of the ioctl fields failed. This was
deliberately added as a warning to make it very obvious to developers that
something needed to be fixed. In reality, this is overkill and disturbs
fuzzing. Switch to pr_warn for a message instead.

Reported-by: syzbot+fa2d5f63ee5904a0115a@syzkaller.appspotmail.com
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Laura Abbott 2018-01-05 11:14:09 -08:00 committed by Greg Kroah-Hartman
parent 458d2fc924
commit 3ee287d35b
1 changed files with 3 additions and 1 deletions
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4
drivers/staging/android/ion/ion-ioctl.c
View File

@ -83,8 +83,10 @@ long ion_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
return -EFAULT;
ret = validate_ioctl_arg(cmd, &data);
if (WARN_ON_ONCE(ret))
if (ret) {
pr_warn_once("%s: ioctl validate failed\n", __func__);
return ret;
}
if (!(dir & _IOC_WRITE))
memset(&data, 0, sizeof(data));