net: qrtr: ns: Fix the incorrect usage of rcu_read_lock()
The rcu_read_lock() is not supposed to lock the kernel_sendmsg() API since it has the lock_sock() in qrtr_sendmsg() which will sleep. Hence, fix it by excluding the locking for kernel_sendmsg(). While at it, let's also use radix_tree_deref_retry() to confirm the validity of the pointer returned by radix_tree_deref_slot() and use radix_tree_iter_resume() to resume iterating the tree properly before releasing the lock as suggested by Doug. Fixes: a7809ff9 ("net: qrtr: ns: Protect radix_tree_deref_slot() using rcu read locks") Reported-by:Douglas Anderson <dianders@chromium.org> Reviewed-by:
Douglas Anderson <dianders@chromium.org> Tested-by:
Douglas Anderson <dianders@chromium.org> Tested-by:
Alex Elder <elder@linaro.org> Signed-off-by:
Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
parent
7575fdda
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