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exec: Copy oldsighand->action under spin-lock
authorBernd Edlinger <bernd.edlinger@hotmail.de>
Mon, 7 Jun 2021 13:54:27 +0000 (15:54 +0200)
committerKees Cook <keescook@chromium.org>
Tue, 25 Oct 2022 22:05:58 +0000 (15:05 -0700)
commit2f52642f0162670e9b02051a0c2edd6f7c5d8eb8
tree9e77ced5c3e449aa1f607c11de88b3295c7112a9tree | snapshot
parentf9cd8e124bf669aeea2383cd3379e3e16e75ceeacommit | diff
exec: Copy oldsighand->action under spin-lock

unshare_sighand should only access oldsighand->action
while holding oldsighand->siglock, to make sure that
newsighand->action is in a consistent state.

Signed-off-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
Cc: stable@vger.kernel.org
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/AM8PR10MB470871DEBD1DED081F9CC391E4389@AM8PR10MB4708.EURPRD10.PROD.OUTLOOK.COM
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