diff options
| author | LOLi <[email protected]> | 2018-08-22 20:03:31 +0200 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2018-08-22 11:03:31 -0700 |
| commit | c434d8806cfdf33a4a0b0ab24fb8e35a7b6811ee (patch) | |
| tree | 6f389d0565d1dc83b75f42396b1c6b32137c3464 /config/kernel-wait.m4 | |
| parent | e8a8208eef3f2e256ddbf91e73add2e08705d482 (diff) | |
Stack overflow when destroying deeply nested clones
Destroy operations on deeply nested chains of clones can overflow
the stack:
Depth Size Location (221 entries)
----- ---- --------
0) 15664 48 mutex_lock+0x5/0x30
1) 15616 8 mutex_lock+0x5/0x30
...
26) 13576 72 dsl_dataset_remove_clones_key.isra.4+0x124/0x1e0 [zfs]
27) 13504 72 dsl_dataset_remove_clones_key.isra.4+0x18a/0x1e0 [zfs]
28) 13432 72 dsl_dataset_remove_clones_key.isra.4+0x18a/0x1e0 [zfs]
...
185) 2128 72 dsl_dataset_remove_clones_key.isra.4+0x18a/0x1e0 [zfs]
186) 2056 72 dsl_dataset_remove_clones_key.isra.4+0x18a/0x1e0 [zfs]
187) 1984 72 dsl_dataset_remove_clones_key.isra.4+0x18a/0x1e0 [zfs]
188) 1912 136 dsl_destroy_snapshot_sync_impl+0x4e0/0x1090 [zfs]
189) 1776 16 dsl_destroy_snapshot_check+0x0/0x90 [zfs]
...
218) 304 128 kthread+0xdf/0x100
219) 176 48 ret_from_fork+0x22/0x40
220) 128 128 kthread+0x0/0x100
Fix this issue by converting dsl_dataset_remove_clones_key() from
recursive to iterative.
Reviewed-by: Paul Zuchowski <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: loli10K <[email protected]>
Closes #7279
Closes #7810
Diffstat (limited to 'config/kernel-wait.m4')
0 files changed, 0 insertions, 0 deletions