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authorHerbert Xu <herbert@gondor.apana.org.au>2015-12-16 16:45:54 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-01-22 20:54:16 -0800
commitac5966d165a9b4115744269a64ffd3d061b5efe2 (patch)
tree06d90d8f2a5ea98c41ca2730575c551fbb42e559 /security
parent04f694ddd4f44f3174e59777bb94a85263741376 (diff)
rhashtable: Fix walker list corruption
[ Upstream commit c6ff5268293ef98e48a99597e765ffc417e39fa5 ] The commit ba7c95ea3870fe7b847466d39a049ab6f156aa2c ("rhashtable: Fix sleeping inside RCU critical section in walk_stop") introduced a new spinlock for the walker list. However, it did not convert all existing users of the list over to the new spin lock. Some continued to use the old mutext for this purpose. This obviously led to corruption of the list. The fix is to use the spin lock everywhere where we touch the list. This also allows us to do rcu_rad_lock before we take the lock in rhashtable_walk_start. With the old mutex this would've deadlocked but it's safe with the new spin lock. Fixes: ba7c95ea3870 ("rhashtable: Fix sleeping inside RCU...") Reported-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'security')
0 files changed, 0 insertions, 0 deletions