Issues

• 2.4.x: sync hangs forever on nearly full pool, zio_dva_allocate loops on ENOSPC without ganging (MOS blocks, special class spilling); 2.2 recovers the pool

  Type: Defect
  openzfs/zfs#19256 · Filter by author alexandroleynikov opened on Oct 6, 2026

• Incorrect handling of RWF_NOAPPEND flag in pwritev2(..., RWF_NOAPPEND)

  Type: Defect
  openzfs/zfs#19254 · Filter by author atrib opened on Oct 6, 2026

• Fatal trap 12: page fault while in kernel mode (at namei+0xe4)

  Type: Defect
  openzfs/zfs#19252 · Filter by author moviuro opened on Oct 6, 2026

• 2.4.4: VERIFY(!HDR_IO_IN_PROGRESS(hdr)) panic in arc_release() from txg_sync under non-raw send/recv of encrypted zvols; #18897 fix not in 2.4.x

  openzfs/zfs#19243 · Filter by author itmooti opened on Oct 3, 2026
  1

• Encrypted dataset: concurrent writes can cause EIO and an arc_release NULL-deref panic

  Type: Defect
  openzfs/zfs#19235 · Filter by author tjikkun opened on Oct 2, 2026

• Assert in zio_dva_allocate() when changing copies of a ddt entry

  Type: Defect
  openzfs/zfs#19226 · Filter by author mmusante-wasabi opened on Oct 1, 2026
  1

• Block cloning doesnt account for space reuse when using checkpoints

  Type: Defect
  openzfs/zfs#19225 · Filter by author nielsproest opened on Oct 1, 2026

• System writes out modified portions of the last memory mapped page beyond file end if file is resized

  Type: Defect
  openzfs/zfs#19220 · Filter by author Slava0135 opened on Sep 30, 2026

• Accessed snapshots not auto-unmounting

  Type: Defect
  openzfs/zfs#19215 · Filter by author Kangaroux opened on Sep 29, 2026

• On a pool whose only top-level vdev is a single leaf disk, once that vdev drops below VDEV_STATE_HEALTHY, **every single-copy allocation falls back to gang blocks, permanently*

  Type: Defect
  openzfs/zfs#19197 · Filter by author gicanlegal opened on Sep 26, 2026

• zpool hang at boot with multiple z_wr_iss kernel threads at 100% CPU

  Type: Defect
  openzfs/zfs#19196 · Filter by author stuartthebruce opened on Sep 26, 2026
  4

• zroot would not import after a clean shutdown

  Type: Defect
  openzfs/zfs#19189 · Filter by author tatuzemdp opened on Sep 25, 2026
  1

• zfs crashes kernel on fadvise issued by backup software

  Type: Defect
  openzfs/zfs#19175 · Filter by author komanek opened on Sep 23, 2026
  1

• Add configure caching to github CI builds

  openzfs/zfs#19166 · Filter by author crass opened on Sep 22, 2026

• Backport 'kernel BUG at mm/usercopy.c' fix to 2.2.x?

  Type: Defect
  openzfs/zfs#19149 · Filter by author wdoekes opened on Sep 20, 2026

• RaidZ1 Pointer bug

  Type: Defect
  openzfs/zfs#19147 · Filter by author ArisTsevrenis opened on Sep 19, 2026
  4

• Recurring kernel memory corruption on Linux 7.0.14 / ZFS 2.4.4: bit 2 set in random 32-bit words (zpl_evict_inode, arc_change_state, dbu_evict)

  Type: Defect
  openzfs/zfs#19144 · Filter by author nrd81 opened on Sep 19, 2026
  1

• Linux: Ability to access files of all datasets from one mount point

  Type: Feature
  openzfs/zfs#19127 · Filter by author crass opened on Sep 16, 2026

• User Quota not matching du output

  Type: Defect
  openzfs/zfs#19079 · Filter by author scratchings opened on Sep 7, 2026
  2

• ZTS: import_relax_metadata_damaged is flaky — the checkpoint does not protect the txg the test requests (~30% failures on FreeBSD)

  Type: Defect
  openzfs/zfs#19077 · Filter by author gmelikov opened on Sep 7, 2026
  3

• [FreeBSD+WinZFS] OpenZFS issues with case-insensitive filesystems

  Type: Question
  openzfs/zfs#19074 · Filter by author jasmindavemath opened on Sep 6, 2026
  7

• The Alpine Linux CI Runner does not pass the ZFS Test Suite (yet)

  Type: Defect
  openzfs/zfs#19052 · Filter by author alex-moch opened on Sep 4, 2026
  4

• ZTS: create_pool() still missing the rm -rf guard added to the default setups in 0daa27fea

  Component: Test Suite
  openzfs/zfs#19049 · Filter by author xfcyhuang opened on Sep 4, 2026
  1

• ztest: fishing-mode busy-wait has no yield or timeout; %016lx assumes LP64

  Type: Defect
  openzfs/zfs#19048 · Filter by author xfcyhuang opened on Sep 4, 2026
  2

• zfs_dedupe_range_copy_memcmp() livelocks if zfs_vnops_read_chunk_size is set to 0

  openzfs/zfs#19047 · Filter by author xfcyhuang opened on Sep 4, 2026
  1