Module Name: src
Committed By: riastradh
Date: Sun Mar 20 13:18:12 UTC 2022
Modified Files:
src/sys/kern: kern_entropy.c
Log Message:
entropy(9): Fix another new race in entropy_account_cpu.
The consolidation xcall can preempt entropy_enter, between when it
unlocks the per-CPU state and when it calls entropy_account_cpu, with
the effect of setting ec->ec_pending=0.
Previously this was impossible because we called entropy_account_cpu
with the per-CPU state still locked, but that doesn't work now that
the global entropy lock is an adaptive lock which might sleep which
is forbidden while the per-CPU state is locked.
To generate a diff of this commit:
cvs rdiff -u -r1.45 -r1.46 src/sys/kern/kern_entropy.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
