Tetsuo Handa 115df2a7c5 net/nfc: Avoid stalls when nfc_alloc_send_skb() returned NULL. ... commit 3bc53be9db upstream. syzbot is reporting stalls at nfc_llcp_send_ui_frame() [1]. This is because nfc_llcp_send_ui_frame() is retrying the loop without any delay when nonblocking nfc_alloc_send_skb() returned NULL. Since there is no need to use MSG_DONTWAIT if we retry until sock_alloc_send_pskb() succeeds, let's use blocking call. Also, in case an unexpected error occurred, let's break the loop if blocking nfc_alloc_send_skb() failed. [1] https://syzkaller.appspot.com/bug?id=4a131cc571c3733e0eff6bc673f4e36ae48f19c6 Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Reported-by: syzbot <syzbot+d29d18215e477cfbfbdd@syzkaller.appspotmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-07-22 14:28:49 +02:00
..
hci	networking: add and use skb_put_u8()	2017-06-16 11:48:40 -04:00
nci	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
Kconfig	…
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
af_nfc.c	net: socket: mark socket protocol handler structs as const	2017-05-16 11:54:07 -04:00
core.c	NFC: fix device-allocation error return	2017-11-30 08:40:55 +00:00
digital.h	…
digital_core.c	NFC: digital: Delete an error message for memory allocation failure	2017-06-23 00:14:12 +02:00
digital_dep.c	NFC: digital: NFC-DEP Target WT(nfcdep,max) is now 14	2017-06-23 00:19:59 +02:00
digital_technology.c	NFC: digital: NFC-A SEL_RES must be one byte	2017-06-23 00:19:59 +02:00
llcp.h	…
llcp_commands.c	net/nfc: Avoid stalls when nfc_alloc_send_skb() returned NULL.	2018-07-22 14:28:49 +02:00
llcp_core.c	networking: introduce and use skb_put_data()	2017-06-16 11:48:37 -04:00
llcp_sock.c	NFC: Add sockaddr length checks before accessing sa_family in bind handlers	2017-06-23 00:38:31 +02:00
netlink.c	NFC: llcp: Limit size of SDP URI	2018-05-30 07:51:57 +02:00
nfc.h	nfc: netlink: HCI event connectivity implementation	2015-12-29 19:06:20 +01:00
rawsock.c	networking: make skb_push & __skb_push return void pointers	2017-06-16 11:48:40 -04:00