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authorLOLi <[email protected]>2018-08-22 20:03:31 +0200
committerBrian Behlendorf <[email protected]>2018-08-22 11:03:31 -0700
commitc434d8806cfdf33a4a0b0ab24fb8e35a7b6811ee (patch)
tree6f389d0565d1dc83b75f42396b1c6b32137c3464 /config/kernel-fpu.m4
parente8a8208eef3f2e256ddbf91e73add2e08705d482 (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-fpu.m4')
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