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linux/net/nfc
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Xiaoming Ni 4b5db93e7f nfc: Avoid endless loops caused by repeated llcp_sock_connect() 
When sock_wait_state() returns -EINPROGRESS, "sk->sk_state" is
 LLCP_CONNECTING. In this case, llcp_sock_connect() is repeatedly invoked,
 nfc_llcp_sock_link() will add sk to local->connecting_sockets twice.
 sk->sk_node->next will point to itself, that will make an endless loop
 and hang-up the system.
To fix it, check whether sk->sk_state is LLCP_CONNECTING in
 llcp_sock_connect() to avoid repeated invoking.

Fixes: b4011239a0 ("NFC: llcp: Fix non blocking sockets connections")
Reported-by: "kiyin(尹亮)" <kiyin@tencent.com>
Link: https://www.openwall.com/lists/oss-security/2020/11/01/1
Cc: <stable@vger.kernel.org> #v3.11
Signed-off-by: Xiaoming Ni <nixiaoming@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
History 2021-03-25 17:02:01 -07:00
..
hci hci: llc_shdlc: style: Simplify bool comparison 2021-01-12 20:18:30 -08:00
nci TTY/Serial driver changes for 5.12-rc1 2021-02-20 21:28:04 -08:00
af_nfc.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
core.c net: nfc: Fix kerneldoc warnings 2020-10-30 11:57:56 -07:00
digital.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288 2019-06-05 17:36:37 +02:00
digital_core.c net: nfc: Fix kerneldoc warnings 2020-10-30 11:57:56 -07:00
digital_dep.c NFC: digital: Remove two unused macroes 2020-09-05 16:01:52 -07:00
digital_technology.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288 2019-06-05 17:36:37 +02:00
Kconfig net: remove redundant 'depends on NET' 2021-01-27 17:04:12 -08:00
llcp.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
llcp_commands.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
llcp_core.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
llcp_sock.c nfc: Avoid endless loops caused by repeated llcp_sock_connect() 2021-03-25 17:02:01 -07:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
netlink.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-01-28 17:09:31 -08:00
nfc.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
rawsock.c NFC: fix resource leak when target index is invalid 2021-01-23 13:34:35 -08:00