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0f86fcc2a7
by protecting against sb->s_shrink eviction on umount with newer kernels deactivate_locked_super calls shrinker_free and only then sops->kill_sb cb, resulting in UAF on umount when trying to reach for the shrinker functions in zpl_prune_sb of in-umount dataset Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Adam Moss <c@yotes.com> Signed-off-by: Pavel Snajdr <snajpa@snajpa.net> Closes #16770 |
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