[linux-nfc] [PATCH v2 0/1] nfc: llcp: a fix after syzbot report
Krzysztof Kozlowski <[email protected]> Wed, 19 Jan 2022 08:48:15 +0100
| Newsgroups | org.01.lists.linux-nfc,dev.linux.lists.oe-linux-nfc,org.kernel.vger.linux-kernel,org.kernel.vger.netdev |
|---|---|
| Message-ID | <[email protected]> |
Hi,
Syzbot reported an easily reproducible NULL pointer dereference which I was
struggling to analyze:
https://syzkaller.appspot.com/bug?extid=7f23bcddf626e0593a39
Although direct fix is obvious, I could not actually find the exact race
condition scenario leading to it. The patch fixes the issue - at least under
my QEMU - however all this code looks racy, so I have a feeling I am plumbing
one leak without fixing root cause.
Therefore I would appreciate some more thoughts on first commit.
Testing
=======
Under QEMU only. The NFC/LLCP code was not really tested on a device.
Best regards,
Krzysztof
Krzysztof Kozlowski (1):
nfc: llcp: fix NULL error pointer dereference on sendmsg() after
failed bind()
net/nfc/llcp_sock.c | 5 +++++
1 file changed, 5 insertions(+)
--
2.32.0
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