Kyle Evans bee314a798 module: freebsd: avoid a taking a destroyed lock in zfs_zevent bits ... At shutdown time, we drain all of the zevents and set the ZEVENT_SHUTDOWN flag. On FreeBSD, we may end up calling zfs_zevent_destroy() after the zevent_lock has been destroyed while the sysevent thread is winding down; we observe ESHUTDOWN, then back out. Events have already been drained, so just inline the kmem_free call in sysevent_worker() to avoid the race, and document the assumption that zfs_zevent_destroy doesn't do anything else useful at that point. This fixes a panic that can occur at module unload time. Reviewed-by: Ryan Moeller <freqlabs@FreeBSD.org> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Kyle Evans <kevans@FreeBSD.org> Closes #13220		2022-03-17 10:14:00 -07:00
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freebsd	module: freebsd: avoid a taking a destroyed lock in zfs_zevent bits	2022-03-17 10:14:00 -07:00
linux	Forbid b{copy,zero,cmp}(). Don't include <strings.h> for <string.h>	2022-03-15 15:13:48 -07:00