audit: Make hash table insertion safe against concurrent lookups

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Currently, the audit tree code does not make sure that when a chunk is
inserted into the hash table, it is fully initialized. So in theory a
user of RCU lookup could see uninitialized structure in the hash table
and crash. Add appropriate barriers between initialization of the
structure and its insertion into hash table.

Reviewed-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Paul Moore <paul@paul-moore.com>

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Jan Kara 2018-11-12 09:54:48 -05:00 • committed by Paul Moore

parent 8d20d6e930

commit 1635e57223

1 changed files with 29 additions and 3 deletions

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kernel/audit_tree.c

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