linux-kernel - Re: [syzbot] [PATCH] null pointer dereference

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Message-ID: <0000000000000e304b060970d3be@google.com>
Date:   Sun, 05 Nov 2023 16:20:42 -0800
From:   syzbot <syzbot+8a78ecea7ac1a2ea26e5@...kaller.appspotmail.com>
To:     linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [PATCH] null pointer dereference

For archival purposes, forwarding an incoming command email to
linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com.

***

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

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

Signed-off-by: Yuran Pereira <yuran.pereira@...mail.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