LOLi 97f8d7961e Fix zvol_state_t->zv_open_count race ... 5559ba0 added zv_state_lock to protect zvol_state_t internal data: this, however, doesn't guard zv->zv_open_count and zv->zv_disk->private_data in zvol_remove_minors_impl(). Fix this by taking zv->zv_state_lock before we check its zv_open_count. P1 (z_zvol) P2 (systemd-udevd) --- --- zvol_remove_minors_impl() : zv->zv_open_count==0 zvol_open() ->mutex_enter(zv_state_lock) : zv->zv_open_count++ ->mutex_exit(zv_state_lock) ->mutex_enter(zv->zv_state_lock) ->zvol_remove(zv) ->mutex_exit(zv->zv_state_lock) : zv->zv_disk->private_data = NULL ->zvol_free() -->ASSERT(zv->zv_open_count==0) * zvol_release() : zv = disk->private_data ->ASSERT(zv && zv->zv_open_count>0) * --- --- * ASSERT() fails Reviewed by: Boris Protopopov <bprotopopov@hotmail.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov Signed-off-by: loli10K <ezomori.nozomu@gmail.com> Closes #6213		2017-06-15 11:08:45 -07:00
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avl	Fix uninitialized variable in avl_add()	2016-07-25 14:21:34 -07:00
icp	Add missing *_destroy/*_fini calls	2017-05-04 19:26:28 -04:00
nvpair	OpenZFS 7812 - Remove gender specific language	2017-02-24 11:07:04 -08:00
unicode	codebase style improvements for OpenZFS 6459 port	2017-01-22 13:25:40 -08:00
zcommon	Make createtxg and guid properties public	2017-05-09 15:36:53 -07:00
zfs	Fix zvol_state_t->zv_open_count race	2017-06-15 11:08:45 -07:00
zpios	codebase style improvements for OpenZFS 6459 port	2017-01-22 13:25:40 -08:00
.gitignore	Improve gitignore	2017-05-25 10:14:13 -07:00
Makefile.in	GZIP compression offloading with QAT accelerator	2017-03-22 17:58:47 -07:00