Re: KASAN: slab-use-after-free Read in nfc_llcp_unregister_device
From: Krzysztof Kozlowski <hidden>
Date: 2023-10-25 07:23:27
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On 25/10/2023 08:27, Abagail ren wrote:
Good day, dear maintainers. Since the email system replied that it refused to accept the email because the text contained HTML, I sent it to you again in the form of shared files. We found a bug using a modified kernel configuration file used by syzbot. We enhanced the probability of vulnerability discovery using our prototype system developed based on syzkaller and found a bug "' KASAN: slab-use-after-free Read in nfc_llcp_unregister_device." I'm still working on it to find out its root cause and availability. The stack information: https://docs.google.com/document/d/1gdHebCRsvVsSPKfilcoXVu3Pctvoj2FSZCACcVYZXns/edit?usp=sharing Kernel Branch: 6.4.0-rc3
Hi, I received two emails from you, so I am not sure if these are separate issues or not. Anyway, there were fixes to these paths and you are testing quite old kernel. If you have the reproducer, it should be straightforward to test new kernel, so please do so. Test on linux-next.
Kernel Config: https://docs.google.com/document/d/1WIM0btqS2dex18HQYaL2xyoW6WdX2TsaNguTnWzHMps/edit?usp=sharing Reproducer: https://docs.google.com/document/d/1LrgGdOgZwO8wz0opusZ7flP9QSFZa32GdozvoxGysyY/edit?usp=sharing
Best regards, Krzysztof