linux-kernel - [BUG] drivers/scsi/dpt_i2o: a possible sleep-in-atomic bug in adpt

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: <4d8d01b4-10c3-653b-e7b0-0603f6287322@gmail.com>
Date:   Tue, 12 Dec 2017 09:57:48 +0800
From:   Jia-Ju Bai <baijiaju1990@...il.com>
To:     aacraid@...ptec.com, jejb@...ux.vnet.ibm.com,
        martin.petersen@...cle.com
Cc:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [BUG] drivers/scsi/dpt_i2o: a possible sleep-in-atomic bug in
 adpt_isr

According to drivers/scsi/dpt_i2o.c, the kernel module may sleep in the 
interrupt handler.
The function call path is:
adpt_isr (interrupt handler)
   adpt_send_nop
     schedule_timeout_uninterruptible --> may sleep

A possible fixing is to replace "schedule_timeout_uninterruptible" with 
"mdelay".
If this fixing is correct, I can send a patch.
This possible is found by my static analysis tool (DSAC) and checked by 
my code review.


Thanks,
Jia-Ju Bai