On Wed, Sep 20, 2023 at 05:51:45PM +0000, Shaoying Xu wrote:
From: Budimir Markovic markovicbudimir@gmail.com
[ Upstream commit b3d26c5702c7d6c45456326e56d2ccf3f103e60f ]
HFSC assumes that inner classes have an fsc curve, but it is currently possible for classes without an fsc curve to become parents. This leads to bugs including a use-after-free.
Don't allow non-root classes without HFSC_FSC to become parents.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Reported-by: Budimir Markovic markovicbudimir@gmail.com Signed-off-by: Budimir Markovic markovicbudimir@gmail.com Acked-by: Jamal Hadi Salim jhs@mojatatu.com Link: https://lore.kernel.org/r/20230824084905.422-1-markovicbudimir@gmail.com Signed-off-by: Jakub Kicinski kuba@kernel.org [ v4.14: Delete NL_SET_ERR_MSG because extack is not added to hfsc_change_class ] Cc: stable@vger.kernel.org # 4.14
Trailing whitespace, please fix your editor :(
Anyway, now queued up, thanks.
greg k-h