Hangyu Hua
51fb8c2c10
dccp: put dccp_qpolicy_full() and dccp_qpolicy_push() in the same lock ...
[ Upstream commit a41b17ff9dacd22f5f118ee53d82da0f3e52d5e3 ]
In the case of sk->dccps_qpolicy == DCCPQ_POLICY_PRIO, dccp_qpolicy_full
will drop a skb when qpolicy is full. And the lock in dccp_sendmsg is
released before sock_alloc_send_skb and then relocked after
sock_alloc_send_skb. The following conditions may lead dccp_qpolicy_push
to add skb to an already full sk_write_queue:
thread1--->lock
thread1--->dccp_qpolicy_full: queue is full. drop a skb
thread1--->unlock
thread2--->lock
thread2--->dccp_qpolicy_full: queue is not full. no need to drop.
thread2--->unlock
thread1--->lock
thread1--->dccp_qpolicy_push: add a skb. queue is full.
thread1--->unlock
thread2--->lock
thread2--->dccp_qpolicy_push: add a skb!
thread2--->unlock
Fix this by moving dccp_qpolicy_full.
Fixes: b1308dc015https://lore.kernel.org/r/20220729110027.40569-1-hbh25y@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-08-25 11:17:49 +02:00
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ax25: Fix UAF bugs in ax25 timers
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dccp: put dccp_qpolicy_full() and dccp_qpolicy_push() in the same lock
2022-08-25 11:17:49 +02:00
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ipv6: Fix signed integer overflow in l2tp_ip6_sendmsg
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wifi: mac80211: fix queue selection for mesh/OCB interfaces
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net: mpls: Fix notifications when deleting a device
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2022-01-05 12:37:45 +01:00
netfilter: nf_tables: fix null deref due to zeroed list head
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netlabel: fix out-of-bounds memory accesses
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netlink: do not reset transport header in netlink_recvmsg()
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NFC: NULL out the dev->rfkill to prevent UAF
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net: openvswitch: fix parsing of nw_proto for IPv6 fragments
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net/packet: fix packet_sock xmit return value checking
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rds: memory leak in __rds_conn_create()
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net: rose: fix netdev reference changes
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rxrpc: Fix decision on when to generate an IDLE ACK
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SUNRPC: Fix READ_PLUS crasher
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net: tipc: fix possible refcount leak in tipc_sk_create()
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net/tls: Fix race in TLS device down flow
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vsock: remove vsock from connected table when connect is interrupted by a signal
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51fb8c2c10