From e4e179a844f52e907e550f887d0a2171f1508af1 Mon Sep 17 00:00:00 2001 From: Laura Abbott Date: Fri, 5 Jan 2018 11:14:09 -0800 Subject: [PATCH] staging: android: ion: Switch from WARN to pr_warn 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 Signed-off-by: Laura Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/android/ion/ion-ioctl.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/staging/android/ion/ion-ioctl.c b/drivers/staging/android/ion/ion-ioctl.c index 6ed2cc15c8c0..a8d3cc412fb9 100644 --- a/drivers/staging/android/ion/ion-ioctl.c +++ b/drivers/staging/android/ion/ion-ioctl.c @@ -60,8 +60,10 @@ 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));