Kyle Evans 421750672b 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		2022-03-18 17:11:43 -07:00
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acl_common.c
callb.c
list.c
sha224.h
sha256.h
sha256c.c
sha384.h
sha512.h
sha512c.c
sha512t.h
spl_acl.c
spl_atomic.c
spl_cmn_err.c
spl_dtrace.c
spl_kmem.c
spl_kstat.c
spl_misc.c
spl_policy.c
spl_procfs_list.c
spl_string.c
spl_sunddi.c
spl_sysevent.c	module: freebsd: avoid a taking a destroyed lock in zfs_zevent bits	2022-03-18 17:11:43 -07:00
spl_taskq.c
spl_uio.c
spl_vfs.c
spl_vm.c
spl_zlib.c
spl_zone.c