Messages in this thread | | | From | Krzysztof Kozlowski <> | Subject | [PATCH v2 0/1] nfc: llcp: a fix after syzbot report | Date | Wed, 19 Jan 2022 08:48:15 +0100 |
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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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