Date: Sat, 17 Jun 2017 06:54:17 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 220074] [kern] sys/kern/kern_prot.c: a sleep-under-mutex bug in crextend Message-ID: <bug-220074-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D220074 Bug ID: 220074 Summary: [kern] sys/kern/kern_prot.c: a sleep-under-mutex bug in crextend 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 kernel may sleep under a mutex, and the function call path in file "sys/kern/kern_prot.c" is: sys_setuid [line 502: acquire the mutex] crcopysafe [line 506] crcopy [line 1991] crsetgroups [line 1892] crextend [line 2081] malloc(M_WAITOK) [line 2032] --> may sleep The possible fix of this bug is to replace "M_WAITOK" in malloc with "M_NOWAIT". This bug is found by a static analysis tool written by myself, and it is checked by my review of the FreeBSD code. Jia-Ju Bai --=20 You are receiving this mail because: You are the assignee for the bug.=
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