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Serapheim Dimitropoulos 37763ea2a6 Fix panic in dsl_process_sub_livelist for EINTR

= Issue

Recently we hit an assertion panic in `dsl_process_sub_livelist` while
exporting the spa and interrupting `bpobj_iterate_nofree`. In that case
`bpobj_iterate_nofree` stops mid-way returning an EINTR without clearing
the intermediate AVL tree that keeps track of the livelist entries it
has encountered so far. At that point the code has a VERIFY for the
number of elements of the AVL expecting it to be zero (which is not the
case for EINTR).

= Fix

Cleanup any intermediate state before destroying the AVL when
encountering EINTR. Also added a comment documenting the scenario where
the EINTR comes up. There is no need to do anything else for the calles
of `dsl_process_sub_livelist` as they already handle the EINTR case.

Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Reviewed-by: Mark Maybee <mark.maybee@delphix.com>
Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Signed-off-by: Serapheim Dimitropoulos <serapheim@delphix.com>
Closes #13939

2022-11-01 12:34:08 -07:00

avl

AVL: Remove obsolete branching optimizations

2022-07-26 10:10:37 -07:00

icp

kcfpool_alloc() should have its argument list marked void

2022-10-12 15:47:39 -07:00

lua

LUA: Fix CVE-2014-5461

2022-09-27 16:49:02 -07:00

nvpair

Update checkstyle workflow env to ubuntu-20.04