Messages in this thread | | | From | Anton Volkov <> | Subject | Possible bug in cypress_m8.ko | Date | Tue, 22 Aug 2017 15:11:24 +0300 |
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Hello.
Judging by the code of cypress_m8.c some functions are considered to be capable of working concurrently with other functions, e.g. cypress_open. There are, however, entities that are protected by the locks at one place and not protected in another. Lines are given using the info from Linux kernel v4.12. Example:
cypress_send spin_lock_irqsave priv->write_urb_in_use = 1; spin_lock_irqrestore (cypress_m8.c: lines 761-763) ... if (result) { priv->write_urb_in_use = 0; //without lock protection (cypress_m8.c: line 783) }
Is it a bug?
Thank you for your time.
-- Anton Volkov Linux Verification Center, ISPRAS web: http://linuxtesting.org e-mail: avolkov@ispras.ru
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