https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=274873
Bug ID: 274873
Summary: A possible data race in sys/netpfil/ipfw/dn_aqm_pie.c
Product: Base System
Version: 14.0-RELEASE
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: b...@freebsd.org
Reporter: isli...@gmail.com
The struct field pst->measurement_start is initialized by init_activate_pie().
And in this function pst->measurement_start is set to AQM_UNOW after
pst->sflags is set:
pst->sflags = PIE_INMEASUREMENT;
pst->measurement_start = AQM_UNOW;
However, if aqm_pie_dequeue() is called right after pst->sflags is set to
PIE_INMEASUREMENT, a data race can occur:
dq_time = now - pst->measurement_start;
because pst->measurement_start is accessed without holding the lock
pst->lock_mtx.
The value of dq_time may be invalid in this condition.
--
You are receiving this mail because:
You are the assignee for the bug.
