https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=220094
Bug ID: 220094
Summary: [scsi] sys/cam/scsi/scsi_sa.c: a sleep-under-mutex bug
in saioctl
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 driver may sleep under a mutex, and the function call path in file
"sys/cam/scsi/scsi_sa.c" in FreeBSD 11.0 is:
saioctl [line 1680: acquire the mutex]
saextget [line 1683]
malloc(M_WAITOK) [line 4444] --> 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.
Thanks,
Jia-Ju Bai
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