linux-kernel - [BUG] stmmac: A possible sleep-in-atomic bug in stmmac

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <6ac71618-c2e5-cba5-0e32-c961961eed20@163.com>
Date:   Sun, 8 Oct 2017 23:13:42 +0800
From:   Jia-Ju Bai <baijiaju1990@....com>
To:     peppe.cavallaro@...com, alexandre.torgue@...com,
        davem@...emloft.net
Cc:     netdev@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [BUG] stmmac: A possible sleep-in-atomic bug in stmmac_suspend

According to stmmac_main.c, the driver may sleep under a spinlock,
and the function call path is:
stmmac_suspend (acquire the spinlock)
   stmmac_disable_all_queues
     napi_disable
       might_sleep --> may sleep
       msleep --> may sleep

This bug is found by my static analysis tool and my code review.


Thanks,
Jia-Ju Bai