Date: Sun, 18 Jun 2017 03:31:31 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 220095] [scsi] sys/dev/dpt/dpt_scsi.c: a sleep-under-mutex bug in dpt_init Message-ID: <bug-220095-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D220095 Bug ID: 220095 Summary: [scsi] sys/dev/dpt/dpt_scsi.c: a sleep-under-mutex bug in dpt_init Product: Base System Version: 11.0-RELEASE 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 in file "sys/dev/dpt/dpt_scsi.c" in FreeBSD 11.0 is: dpt_init [line 1246: acquire the mutex] dptallocsgmap [line 1282] bus_dmamap_load(BUS_DMA_WAITOK) [line 323] --> may sleep The possible fix of this bug is to set the last parameter in bus_dmamap_loa= d to "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. Thanks, Jia-Ju Bai --=20 You are receiving this mail because: You are the assignee for the bug.=
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