https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=220079
Bug ID: 220079
Summary: [kern] sys/kern/vfs_subr.c: double mutex locks in
vgone
Product: Base System
Version: 11.0-RELEASE
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
The kernel may has double mutex locks, and the code path in file
"sys/kern/vfs_subr.c" in FreeBSD 11.0 release is:
vflush [line 3050: acquire the lock by VI_LOCK]
vgone [line 3057]
VI_LOCK [line 3100] --> lock again
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
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