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mirror_zfs/module/zfs
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Rob N 688514e470
dmu_buf_will_clone: fix race in transition back to NOFILL 
Previously, dmu_buf_will_clone() would roll back any dirty record, but
would not clean out the modified data nor reset the state before
releasing the lock. That leaves the last-written data in db_data, but
the dbuf in the wrong state.

This is eventually corrected when the dbuf state is made NOFILL, and
dbuf_noread() called (which clears out the old data), but at this point
its too late, because the lock was already dropped with that invalid
state.

Any caller acquiring the lock before the call into
dmu_buf_will_not_fill() can find what appears to be a clean, readable
buffer, and would take the wrong state from it: it should be getting the
data from the cloned block, not from earlier (unwritten) dirty data.

Even after the state was switched to NOFILL, the old data was still not
cleaned out until dbuf_noread(), which is another gap for a caller to
take the lock and read the wrong data.

This commit fixes all this by properly cleaning up the previous state
and then setting the new state before dropping the lock. The
DBUF_VERIFY() calls confirm that the dbuf is in a valid state when the
lock is down.

Sponsored-by: Klara, Inc.
Sponsored-By: OpenDrives Inc.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Pawel Jakub Dawidek <pawel@dawidek.net>
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Closes #15566
Closes #15526
2023-11-28 09:53:04 -08:00
..
abd.c Make abd_raidz_gen_iterate() pass an initialized pointer to the callback 2023-11-07 10:24:15 -08:00
aggsum.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
arc.c L2ARC: Restrict write size to 1/4 of the device 2023-11-14 13:47:57 -08:00
blake3_zfs.c blake3: fix up bogus checksums in face of cpu migration 2023-05-01 17:21:27 -07:00
blkptr.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
bplist.c Use list_remove_head() where possible. 2023-06-09 10:12:52 -07:00
bpobj.c Add explicit prefetches to bpobj_iterate(). 2023-07-21 11:50:48 -07:00
bptree.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
bqueue.c Batch enqueue/dequeue for bqueue 2023-01-10 13:39:22 -08:00
brt.c brt: lift internal definitions into _impl header 2023-11-27 13:34:43 -08:00
btree.c btree: Implement faster binary search algorithm 2023-05-26 10:03:12 -07:00
dataset_kstats.c Update the kstat dataset_name when renaming a zvol 2023-11-07 11:34:50 -08:00
dbuf_stats.c Consider dnode_t allocations in dbuf cache size accounting 2023-11-17 13:25:53 -08:00
dbuf.c dmu_buf_will_clone: fix race in transition back to NOFILL 2023-11-28 09:53:04 -08:00
ddt_zap.c Pack our DDT ZAPs a bit denser. 2023-06-30 09:42:02 -07:00
ddt.c ddt_addref: remove unnecessary phys fill when refcount is 0 2023-06-30 09:01:58 -07:00
dmu_diff.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dmu_object.c zfs redact fails when dnodesize=auto 2023-02-16 09:23:39 -08:00
dmu_objset.c Improve ZFS objset sync parallelism 2023-11-06 10:38:42 -08:00
dmu_recv.c Fix raw receive with different indirect block size. 2023-07-14 16:16:40 -07:00
dmu_redact.c Increase limit of redaction list by using spill block 2023-08-26 11:34:43 -07:00
dmu_send.c zdb: add -B option to generate backup stream 2023-06-05 11:54:42 -07:00
dmu_traverse.c Fix prefetching of indirect blocks while destroying 2023-03-24 10:20:07 -07:00
dmu_tx.c DMU: Do not pre-read holes during write 2023-10-11 16:37:21 -07:00
dmu_zfetch.c Add prefetch property 2023-10-24 11:00:07 -07:00
dmu.c ZIL: Avoid dbuf_read() before dmu_sync(). 2023-08-11 09:04:08 -07:00
dnode_sync.c Improve ZFS objset sync parallelism 2023-11-06 10:38:42 -08:00
dnode.c dnode_is_dirty: check dnode and its data for dirtiness 2023-11-28 09:07:57 -08:00
dsl_bookmark.c Increase limit of redaction list by using spill block 2023-08-26 11:34:43 -07:00
dsl_crypt.c nvpair: Constify string functions 2023-03-14 15:25:50 -07:00
dsl_dataset.c Improve ZFS objset sync parallelism 2023-11-06 10:38:42 -08:00
dsl_deadlist.c Refactor dmu_prefetch(). 2023-08-07 13:54:41 -07:00
dsl_deleg.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dsl_destroy.c Increase limit of redaction list by using spill block 2023-08-26 11:34:43 -07:00
dsl_dir.c Fix ENOSPC for extended quota 2023-09-28 14:10:07 -07:00
dsl_pool.c Improve ZFS objset sync parallelism 2023-11-06 10:38:42 -08:00
dsl_prop.c nvpair: Constify string functions 2023-03-14 15:25:50 -07:00
dsl_scan.c unnecessary alloc/free in dsl_scan_visitbp() 2023-11-28 09:20:48 -08:00
dsl_synctask.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dsl_userhold.c nvpair: Constify string functions 2023-03-14 15:25:50 -07:00
edonr_zfs.c Remove unused Edon-R variants 2023-03-14 15:59:58 -07:00
fm.c Use list_remove_head() where possible. 2023-06-09 10:12:52 -07:00
gzip.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
hkdf.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
lz4_zfs.c Updated the lz4 decompressor 2022-01-07 10:36:49 -08:00
lz4.c lz4: Cherrypick fix for CVE-2021-3520 2022-01-12 16:14:36 -08:00
lzjb.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
metaslab.c RAID-Z expansion feature 2023-11-08 10:19:41 -08:00
mmp.c Use abd_zero_off() where applicable 2023-11-17 13:28:32 -08:00
multilist.c Cleanup: Specify unsignedness on things that should not be signed 2022-09-27 16:42:41 -07:00
objlist.c Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
pathname.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
range_tree.c btree: Implement faster binary search algorithm 2023-05-26 10:03:12 -07:00
refcount.c Switch refcount tracking from lists to AVL-trees. 2023-06-14 08:02:27 -07:00
rrwlock.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
sa.c sa_lookup() ignores buffer size. 2023-11-07 12:11:48 -08:00
sha2_zfs.c Add generic implementation handling and SHA2 impl 2023-03-02 13:52:21 -08:00
skein_zfs.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
spa_checkpoint.c RAID-Z expansion feature 2023-11-08 10:19:41 -08:00
spa_config.c Add mutex_enter_interruptible() for interruptible sleeping IOCTLs 2023-10-26 09:17:40 -07:00
spa_errlog.c Fix snap_obj_array memory leak in check_filesystem() 2023-11-14 12:59:02 -08:00
spa_history.c nvpair: Constify string functions 2023-03-14 15:25:50 -07:00
spa_log_spacemap.c Refactor dmu_prefetch(). 2023-08-07 13:54:41 -07:00
spa_misc.c Improve ZFS objset sync parallelism 2023-11-06 10:38:42 -08:00
spa_stats.c Cleanup: Specify unsignedness on things that should not be signed 2022-09-27 16:42:41 -07:00
spa.c Don't allow attach to a raidz child vdev 2023-11-27 09:46:38 -08:00
space_map.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
space_reftree.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
THIRDPARTYLICENSE.cityhash OpenZFS 8484 - Implement aggregate sum and use for arc counters 2018-06-06 09:35:59 -07:00
THIRDPARTYLICENSE.cityhash.descrip OpenZFS 8484 - Implement aggregate sum and use for arc counters 2018-06-06 09:35:59 -07:00
txg.c Another set of vdev queue optimizations. 2023-06-27 09:09:48 -07:00
uberblock.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
unique.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_draid_rand.c Distributed Spare (dRAID) Feature 2020-11-13 13:51:51 -08:00
vdev_draid.c RAID-Z expansion feature 2023-11-08 10:19:41 -08:00
vdev_indirect_births.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
vdev_indirect_mapping.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
vdev_indirect.c Don't emit cksum_{actual_expected} in ereport.fs.zfs.checksum events 2023-07-21 11:49:26 -07:00
vdev_initialize.c RAID-Z expansion feature 2023-11-08 10:19:41 -08:00
vdev_label.c Use abd_zero_off() where applicable 2023-11-17 13:28:32 -08:00
vdev_mirror.c Improve too large physical ashift handling 2022-09-08 10:30:53 -07:00
vdev_missing.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_queue.c Fix accounting error for pending sync IO ops in zpool iostat 2023-11-07 09:06:14 -08:00
vdev_raidz_math_aarch64_neon_common.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_raidz_math_aarch64_neon.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_raidz_math_aarch64_neonx2.c Fix Clang 15 compilation errors 2022-11-30 13:46:26 -08:00
vdev_raidz_math_avx2.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_raidz_math_avx512bw.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_raidz_math_avx512f.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_raidz_math_impl.h RAIDZ: Use cache blocking during parity math 2023-10-30 14:54:27 -07:00
vdev_raidz_math_powerpc_altivec_common.h Linux ppc64le ieee128 compat: Do not redefine __asm on external headers 2023-01-13 10:58:58 -08:00
vdev_raidz_math_powerpc_altivec.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_raidz_math_scalar.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_raidz_math_sse2.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_raidz_math_ssse3.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_raidz_math.c Miscellaneous FreBSD compilation bugfixes 2023-04-06 10:35:02 -07:00
vdev_raidz.c RAID-Z expansion feature 2023-11-08 10:19:41 -08:00
vdev_rebuild.c Tweak rebuild in-flight hard limit 2023-09-29 08:21:25 -07:00
vdev_removal.c nvpair: Constify string functions 2023-03-14 15:25:50 -07:00
vdev_root.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_trim.c RAID-Z expansion feature 2023-11-08 10:19:41 -08:00
vdev.c RAID-Z expansion feature 2023-11-08 10:19:41 -08:00
zap_leaf.c Cleanup: Remove constant comparisons reported by CodeQL 2023-03-08 13:51:46 -08:00
zap_micro.c btree: Implement faster binary search algorithm 2023-05-26 10:03:12 -07:00
zap.c Cleanup: Use NULL when doing NULL pointer comparisons 2023-01-12 16:00:37 -08:00
zcp_get.c nvpair: Constify string functions 2023-03-14 15:25:50 -07:00
zcp_global.c OpenZFS 8600 - ZFS channel programs - snapshot 2018-02-08 15:29:24 -08:00
zcp_iter.c nvpair: Constify string functions 2023-03-14 15:25:50 -07:00
zcp_set.c Support setting user properties in a channel program 2020-02-14 13:41:42 -08:00
zcp_synctask.c Add zfs.sync.snapshot_rename 2022-09-02 13:31:19 -07:00
zcp.c nvpair: Constify string functions 2023-03-14 15:25:50 -07:00
zfeature.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_byteswap.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_chksum.c Add generic implementation handling and SHA2 impl 2023-03-02 13:52:21 -08:00
zfs_fm.c Don't emit cksum_{actual_expected} in ereport.fs.zfs.checksum events 2023-07-21 11:49:26 -07:00
zfs_fuid.c Use list_remove_head() where possible. 2023-06-09 10:12:52 -07:00
zfs_impl.c Add generic implementation handling and SHA2 impl 2023-03-02 13:52:21 -08:00
zfs_ioctl.c zvol: fix delayed update to block device ro entry 2023-10-31 09:50:38 -07:00
zfs_log.c ZIL: Cleanup sync and commit handling 2023-10-30 14:51:56 -07:00
zfs_onexit.c Use list_remove_head() where possible. 2023-06-09 10:12:52 -07:00
zfs_quota.c Revert "Do not persist user/group/project quota zap objects when unneeded" 2023-10-23 09:55:36 -07:00
zfs_ratelimit.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_replay.c Linux 6.3 compat: idmapped mount API changes 2023-04-10 14:15:36 -07:00
zfs_rlock.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_sa.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_vnops.c Fix block cloning between unencrypted and encrypted datasets 2023-10-31 13:49:41 -07:00
zil.c ZIO: Optimize zio_flush() 2023-11-17 14:00:59 -08:00
zio_checksum.c Don't emit cksum_{actual_expected} in ereport.fs.zfs.checksum events 2023-07-21 11:49:26 -07:00
zio_compress.c Skip memory allocation when compressing holes 2023-02-27 14:41:02 -08:00
zio_inject.c Cleanup: Switch to strlcpy from strncpy 2022-09-27 16:35:29 -07:00
zio.c ZIO: Optimize zio_flush() 2023-11-17 14:00:59 -08:00
zle.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zrlock.c Micro-optimize zrl_remove() 2022-11-29 09:26:03 -08:00
zthr.c Switch from _Noreturn to __attribute__((noreturn)) 2022-03-23 08:51:00 -07:00
zvol.c ZVOL: Minor code cleanup 2023-11-27 13:16:59 -08:00