linux-kernel - Re: [syzbot] test general protection fault in ptp

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Message-ID: <000000000000c55bd50609713078@google.com>
Date:   Sun, 05 Nov 2023 16:46:54 -0800
From:   syzbot <syzbot+8a78ecea7ac1a2ea26e5@...kaller.appspotmail.com>
To:     linux-kernel@...r.kernel.org
Subject: Re: [syzbot] test general protection fault in ptp_ioctl

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***

Subject: test general protection fault in ptp_ioctl
Author: lizhi.xu@...driver.com

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 4652b8e4f3ff
diff --git a/drivers/ptp/ptp_chardev.c b/drivers/ptp/ptp_chardev.c
index 282cd7d24077..27c1ef493617 100644
--- a/drivers/ptp/ptp_chardev.c
+++ b/drivers/ptp/ptp_chardev.c
@@ -585,7 +585,5 @@ ssize_t ptp_read(struct posix_clock_context *pccontext, uint rdflags,
 free_event:
 	kfree(event);
 exit:
-	if (result < 0)
-		ptp_release(pccontext);
 	return result;
 }