R. Christian McDonald
06f98c554f
hashalloc(9) rounds the requested size down to a power of two and writes
the result back, but pf_initialize() stored it into the mask, which the
next line overwrites from the unrounded size. With a
net.pf.source_nodes_hashsize that is not a power of two the mask is
larger than the table: pf_hashsrc() returns rows past its end, the row
walkers in pf_purge_expired_src_nodes() and the ioctl handlers run past
it, and pf_cleanup() frees it with the wrong size. The key and UDP
endpoint hashes already take the rounded size.
Reviewed by: glebius, kp
Fixes: cd5ff4e841 ("pf: use hashalloc(9) for key, id, src-node and udp-endpoint hashes")
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D60949
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