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linux/net/qrtr
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Manivannan Sadhasivam 082bb94fe1 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: a7809ff90c ("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>
History 2020-10-06 06:01:35 -07:00
..
Kconfig treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
Makefile net: qrtr: Add MHI transport layer 2020-05-07 13:21:12 -07:00
mhi.c net: qrtr: Add MHI transport layer 2020-05-07 13:21:12 -07:00
ns.c net: qrtr: ns: Fix the incorrect usage of rcu_read_lock() 2020-10-06 06:01:35 -07:00
qrtr.c net: qrtr: check skb_put_padto() return value 2020-09-09 11:04:39 -07:00
qrtr.h net: qrtr: Fix FIXME related to qrtr_ns_init() 2020-03-03 17:52:21 -08:00
smd.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
tun.c net: qrtr: Simplify 'qrtr_tun_release()' 2019-10-30 17:58:23 -07:00