Date: Sat, 24 Jun 2017 03:21:48 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 220240] sys/dev/xl/if_xl.c: A possible sleep-under-mutex bug in xl_list_rx_init Message-ID: <bug-220240-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D220240 Bug ID: 220240 Summary: sys/dev/xl/if_xl.c: A possible sleep-under-mutex bug in xl_list_rx_init Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: baijiaju1990@163.com The driver may sleep under a mutex, and the function call path is: xl_resume [acquire the mutex] xl_init_locked xl_list_rx_init bus_dmamap_create(BUS_DMA_WAITOK) --> may sleep The possible fix of this bug is to replace the "BUS_DMA_WAITOK" in bus_dmamap_create with "BUS_DMA_NOWAIT". This bug is found by a static analysis tool written by myself, and it is checked by my review of the FreeBSD code. --=20 You are receiving this mail because: You are the assignee for the bug.=
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