srcu: Tighten cleanup_srcu_struct() GP checks

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Currently, cleanup_srcu_struct() checks for a grace period in progress,
but it does not check for a grace period that has not yet started but
which might start at any time.  Such a situation could result in a
use-after-free bug, so this commit adds a check for a grace period that
is needed but not yet started to cleanup_srcu_struct().

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

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This commit is contained in:

Paul E. McKenney 2022-01-12 09:52:44 -08:00

parent 3123109284

commit 8ed0076020

1 changed files with 4 additions and 2 deletions

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6

kernel/rcu/srcutree.c

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