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1a5b96b8ee
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Matthew Ahrens 1a5b96b8ee OpenZFS 9329 - panic in zap_leaf_lookup() due to concurrent zapification 
For the null pointer issue shown below, the solution is to initialize the
contents of the object before changing its type, so that concurrent accessors
will see it as non-zapified until it is ready for access via the ZAP.

    BAD TRAP: type=e (#pf Page fault) rp=ffffff00ff520440 addr=20 occurred
    in module "zfs" due to a NULL pointer dereference

    ffffff00ff520320 unix:die+df ()
    ffffff00ff520430 unix:trap+dc0 ()
    ffffff00ff520440 unix:cmntrap+e6 ()
    ffffff00ff520590 zfs:zap_leaf_lookup+46 ()
    ffffff00ff520640 zfs:fzap_lookup+a9 ()
    ffffff00ff5206e0 zfs:zap_lookup_norm+111 ()
    ffffff00ff520730 zfs:zap_contains+42 ()
    ffffff00ff520760 zfs:dsl_dataset_has_resume_receive_state+47 ()
    ffffff00ff520900 zfs:get_receive_resume_stats+3e ()
    ffffff00ff520a90 zfs:dsl_dataset_stats+262 ()
    ffffff00ff520ac0 zfs:dmu_objset_stats+2b ()
    ffffff00ff520b10 zfs:zfs_ioc_objset_stats_impl+64 ()
    ffffff00ff520b60 zfs:zfs_ioc_objset_stats+33 ()
    ffffff00ff520bd0 zfs:zfs_ioc_dataset_list_next+140 ()
    ffffff00ff520c80 zfs:zfsdev_ioctl+4d7 ()
    ffffff00ff520cc0 genunix:cdev_ioctl+39 ()
    ffffff00ff520d10 specfs:spec_ioctl+60 ()
    ffffff00ff520da0 genunix:fop_ioctl+55 ()
    ffffff00ff520ec0 genunix:ioctl+9b ()
    ffffff00ff520f10 unix:brand_sys_sysenter+1c9 ()

Porting Notes:
* DMU_OT_BYTESWAP conditional in zap_lockdir_impl() kept.

Authored by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Pavel Zakharov <pavel.zakharov@delphix.com>
Reviewed by: Brad Lewis <brad.lewis@delphix.com>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Approved by: Dan McDonald <danmcd@joyent.com>
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>

OpenZFS-issue: https://illumos.org/issues/9329
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/e8e0f97
Closes #7578
2018-05-31 10:53:49 -07:00
..
abd.c Update build system and packaging 2018-05-29 16:00:33 -07:00
arc.c Update build system and packaging 2018-05-29 16:00:33 -07:00
blkptr.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
bplist.c
bpobj.c OpenZFS 7614, 9064 - zfs device evacuation/removal 2018-04-14 12:16:17 -07:00
bptree.c Native Encryption for ZFS on Linux 2017-08-14 10:36:48 -07:00
bqueue.c Call cv_signal() with mutex held 2017-06-26 14:36:49 -07:00
dbuf_stats.c Update build system and packaging 2018-05-29 16:00:33 -07:00
dbuf.c Update build system and packaging 2018-05-29 16:00:33 -07:00
ddt_zap.c Update build system and packaging 2018-05-29 16:00:33 -07:00
ddt.c Update build system and packaging 2018-05-29 16:00:33 -07:00
dmu_diff.c Fix issues found with zfs diff 2018-05-01 11:24:20 -07:00
dmu_object.c OpenZFS 9329 - panic in zap_leaf_lookup() due to concurrent zapification 2018-05-31 10:53:49 -07:00
dmu_objset.c Update build system and packaging 2018-05-29 16:00:33 -07:00
dmu_send.c OpenZFS 9256 - zfs send space estimation off by > 10% on some datasets 2018-05-08 08:59:24 -07:00
dmu_traverse.c Update build system and packaging 2018-05-29 16:00:33 -07:00
dmu_tx.c Update build system and packaging 2018-05-29 16:00:33 -07:00
dmu_zfetch.c Update build system and packaging 2018-05-29 16:00:33 -07:00
dmu.c Update build system and packaging 2018-05-29 16:00:33 -07:00
dnode_sync.c Raw sends must be able to decrease nlevels 2018-02-02 11:43:11 -08:00
dnode.c Fix object reclaim when using large dnodes 2018-04-17 11:13:57 -07:00
dsl_bookmark.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
dsl_crypt.c Add support for decryption faults in zinject 2018-05-02 15:36:20 -07:00
dsl_dataset.c Update build system and packaging 2018-05-29 16:00:33 -07:00
dsl_deadlist.c OpenZFS 7614, 9064 - zfs device evacuation/removal 2018-04-14 12:16:17 -07:00
dsl_deleg.c Update build system and packaging 2018-05-29 16:00:33 -07:00
dsl_destroy.c Update build system and packaging 2018-05-29 16:00:33 -07:00
dsl_dir.c Update build system and packaging 2018-05-29 16:00:33 -07:00
dsl_pool.c Update build system and packaging 2018-05-29 16:00:33 -07:00
dsl_prop.c Update build system and packaging 2018-05-29 16:00:33 -07:00
dsl_scan.c Update build system and packaging 2018-05-29 16:00:33 -07:00
dsl_synctask.c Update build system and packaging 2018-05-29 16:00:33 -07:00
dsl_userhold.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
edonr_zfs.c DLPX-44812 integrate EP-220 large memory scalability 2016-11-29 14:34:27 -08:00
fm.c Update build system and packaging 2018-05-29 16:00:33 -07:00
gzip.c Update build system and packaging 2018-05-29 16:00:33 -07:00
hkdf.c Encryption patch follow-up 2017-10-11 16:54:48 -04:00
lz4.c Fix LZ4_uncompress_unknownOutputSize caused panic 2017-05-19 13:45:46 -07:00
lzjb.c
Makefile.in OpenZFS 9079 - race condition in starting and ending condensing thread for indirect vdevs 2018-04-14 12:23:53 -07:00
metaslab.c Update build system and packaging 2018-05-29 16:00:33 -07:00
mmp.c Update build system and packaging 2018-05-29 16:00:33 -07:00
multilist.c Update build system and packaging 2018-05-29 16:00:33 -07:00
pathname.c Update build system and packaging 2018-05-29 16:00:33 -07:00
policy.c Take user namespaces into account in policy checks 2018-03-07 15:40:42 -08:00
qat_compress.c Fix inst_num overflow in qat_crypt.c 2018-05-01 20:44:24 -07:00
qat_crypt.c Fix inst_num overflow in qat_crypt.c 2018-05-01 20:44:24 -07:00
qat.c SHA256 QAT acceleration 2018-03-15 10:53:58 -07:00
qat.h Resolve QAT issues with incompressible data 2018-03-29 17:40:34 -07:00
range_tree.c OpenZFS 9486 - reduce memory used by device removal on fragmented pools 2018-05-24 10:18:07 -07:00
refcount.c Linux 4.11 compat: avoid refcount_t name conflict 2017-02-28 16:10:18 -08:00
rrwlock.c Fix spelling 2017-01-03 11:31:18 -06:00
sa.c Update build system and packaging 2018-05-29 16:00:33 -07:00
sha256.c SHA256 QAT acceleration 2018-03-15 10:53:58 -07:00
skein_zfs.c DLPX-44812 integrate EP-220 large memory scalability 2016-11-29 14:34:27 -08:00
spa_boot.c
spa_config.c Update build system and packaging 2018-05-29 16:00:33 -07:00
spa_errlog.c Update build system and packaging 2018-05-29 16:00:33 -07:00
spa_history.c Update build system and packaging 2018-05-29 16:00:33 -07:00
spa_misc.c Update build system and packaging 2018-05-29 16:00:33 -07:00
spa_stats.c Update build system and packaging 2018-05-29 16:00:33 -07:00
spa.c Update build system and packaging 2018-05-29 16:00:33 -07:00
space_map.c OpenZFS 7614, 9064 - zfs device evacuation/removal 2018-04-14 12:16:17 -07:00
space_reftree.c OpenZFS 7614, 9064 - zfs device evacuation/removal 2018-04-14 12:16:17 -07:00
trace.c OpenZFS 7614, 9064 - zfs device evacuation/removal 2018-04-14 12:16:17 -07:00
txg.c Update build system and packaging 2018-05-29 16:00:33 -07:00
uberblock.c Multi-modifier protection (MMP) 2017-07-13 13:54:00 -04:00
unique.c
vdev_cache.c Update build system and packaging 2018-05-29 16:00:33 -07:00
vdev_disk.c zpool reopen should detect expanded devices 2018-05-31 10:36:37 -07:00
vdev_file.c OpenZFS 7614, 9064 - zfs device evacuation/removal 2018-04-14 12:16:17 -07:00
vdev_indirect_births.c Update build system and packaging 2018-05-29 16:00:33 -07:00
vdev_indirect_mapping.c Update build system and packaging 2018-05-29 16:00:33 -07:00
vdev_indirect.c Update build system and packaging 2018-05-29 16:00:33 -07:00
vdev_label.c OpenZFS 9486 - reduce memory used by device removal on fragmented pools 2018-05-24 10:18:07 -07:00
vdev_mirror.c Update build system and packaging 2018-05-29 16:00:33 -07:00
vdev_missing.c OpenZFS 7614, 9064 - zfs device evacuation/removal 2018-04-14 12:16:17 -07:00
vdev_queue.c Fix zio->io_priority failed (7 < 6) assert 2018-05-29 18:13:48 -07:00
vdev_raidz_math_aarch64_neon_common.h ABD raidz NEON support 2016-11-29 14:34:33 -08:00
vdev_raidz_math_aarch64_neon.c codebase style improvements for OpenZFS 6459 port 2017-01-22 13:25:40 -08:00
vdev_raidz_math_aarch64_neonx2.c ABD raidz NEON support 2016-11-29 14:34:33 -08:00
vdev_raidz_math_avx2.c ABD raidz avx512f support 2016-11-29 14:34:33 -08:00
vdev_raidz_math_avx512bw.c ABD: Adapt avx512bw raidz assembly 2016-12-15 17:31:33 -08:00
vdev_raidz_math_avx512f.c Use cstyle -cpP in make cstyle check 2016-12-12 10:46:26 -08:00
vdev_raidz_math_impl.h codebase style improvements for OpenZFS 6459 port 2017-01-22 13:25:40 -08:00
vdev_raidz_math_scalar.c ABD Vectorized raidz 2016-11-29 14:34:33 -08:00
vdev_raidz_math_sse2.c ABD raidz avx512f support 2016-11-29 14:34:33 -08:00
vdev_raidz_math_ssse3.c codebase style improvements for OpenZFS 6459 port 2017-01-22 13:25:40 -08:00
vdev_raidz_math.c Update build system and packaging 2018-05-29 16:00:33 -07:00
vdev_raidz.c OpenZFS 7614, 9064 - zfs device evacuation/removal 2018-04-14 12:16:17 -07:00
vdev_removal.c Update build system and packaging 2018-05-29 16:00:33 -07:00
vdev_root.c OpenZFS 9075 - Improve ZFS pool import/load process and corrupted pool recovery 2018-05-08 21:35:27 -07:00
vdev.c zpool reopen should detect expanded devices 2018-05-31 10:36:37 -07:00
zap_leaf.c OpenZFS 9328 - zap code can take advantage of c99 2018-05-31 10:53:11 -07:00
zap_micro.c OpenZFS 9329 - panic in zap_leaf_lookup() due to concurrent zapification 2018-05-31 10:53:49 -07:00
zap.c OpenZFS 9328 - zap code can take advantage of c99 2018-05-31 10:53:11 -07:00
zcp_get.c Fix coverity defects: zfs channel programs 2018-02-20 11:19:42 -08:00
zcp_global.c OpenZFS 8600 - ZFS channel programs - snapshot 2018-02-08 15:29:24 -08:00
zcp_iter.c OpenZFS 7431 - ZFS Channel Programs 2018-02-08 15:28:18 -08:00
zcp_synctask.c Fix coverity defects: zfs channel programs 2018-02-20 11:19:42 -08:00
zcp.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfeature.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
zfs_acl.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_byteswap.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_ctldir.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_debug.c enable zfs_dbgmsg() by default, without dprintf() 2018-03-21 15:37:32 -07:00
zfs_dir.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_fm.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_fuid.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_ioctl.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_log.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_onexit.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_ratelimit.c Change checksum & IO delay ratelimit values 2018-03-04 17:34:51 -08:00
zfs_replay.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_rlock.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_sa.c Project Quota on ZFS 2018-02-13 14:54:54 -08:00
zfs_vfsops.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_vnops.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_znode.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zil.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zio_checksum.c Undo c89 workarounds to match with upstream 2017-11-04 13:25:13 -07:00
zio_compress.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zio_crypt.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zio_inject.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zio.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zle.c Fix zle_decompress out of bound access 2018-02-09 10:08:05 -08:00
zpl_ctldir.c RHEL 7.5 compat: FMODE_KABI_ITERATE 2018-05-02 15:01:24 -07:00
zpl_export.c Use cstyle -cpP in make cstyle check 2016-12-12 10:46:26 -08:00
zpl_file.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zpl_inode.c Linux 4.12 compat: CURRENT_TIME removed 2017-05-10 09:30:48 -07:00
zpl_super.c Allow mounting datasets more than once 2018-04-13 10:44:05 -07:00
zpl_xattr.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zrlock.c Update build system and packaging 2018-05-29 16:00:33 -07:00
zthr.c Avoid Linux hung task message in ZTHR 2018-04-15 15:12:28 -07:00
zvol.c Linux compat 4.16: blk_queue_flag_{set,clear} 2018-04-10 10:32:14 -07:00