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From: syzbot <syzbot+8a78ecea7ac1a2ea26e5@syzkaller.appspotmail.com>
To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [PATCH] null pointer dereference
Date: Sun, 05 Nov 2023 16:20:42 -0800	[thread overview]
Message-ID: <0000000000000e304b060970d3be@google.com> (raw)
In-Reply-To: <000000000000e7b62806096c7d67@google.com>

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***

Subject: [PATCH] null pointer dereference
Author: yuran.pereira@hotmail.com

#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

Signed-off-by: Yuran Pereira <yuran.pereira@hotmail.com>
---
 drivers/ptp/ptp_chardev.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/ptp/ptp_chardev.c b/drivers/ptp/ptp_chardev.c
index 282cd7d24077..5b36c34629a0 100644
--- a/drivers/ptp/ptp_chardev.c
+++ b/drivers/ptp/ptp_chardev.c
@@ -173,6 +173,8 @@ long ptp_ioctl(struct posix_clock_context *pccontext, unsigned int cmd,
 	int enable, err = 0;
 
 	tsevq = pccontext->private_clkdata;
+	if (!tsevq)
+		return -EINVAL;
 
 	switch (cmd) {
 
-- 
2.25.1


  reply	other threads:[~2023-11-06  0:20 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-11-05 19:10 [syzbot] [net?] general protection fault in ptp_ioctl syzbot
2023-11-06  0:20 ` syzbot [this message]
2023-11-06  0:46 ` [syzbot] test " syzbot
2023-11-06  1:19 ` [PATCH] ptp: fix null ptr deref in ptp_ioctrl Lizhi Xu
2023-11-06  2:12   ` Rahul Rameshbabu

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