Eric Dumazet 1ad98e9d1b tcp/dccp: fix lockdep issue when SYN is backlogged ... In normal SYN processing, packets are handled without listener lock and in RCU protected ingress path. But syzkaller is known to be able to trick us and SYN packets might be processed in process context, after being queued into socket backlog. In commit 06f877d613 ("tcp/dccp: fix other lockdep splats accessing ireq_opt") I made a very stupid fix, that happened to work mostly because of the regular path being RCU protected. Really the thing protecting ireq->ireq_opt is RCU read lock, and the pseudo request refcnt is not relevant. This patch extends what I did in commit 449809a66c ("tcp/dccp: block BH for SYN processing") by adding an extra rcu_read_{lock|unlock} pair in the paths that might be taken when processing SYN from socket backlog (thus possibly in process context) Fixes: 06f877d613 ("tcp/dccp: fix other lockdep splats accessing ireq_opt") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: syzbot <syzkaller@googlegroups.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2018-10-01 15:42:13 -07:00
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acpi	ACPICA: Update version to 20180810	2018-08-14 23:49:13 +02:00
asm-generic	asm-generic: io: Fix ioport_map() for !CONFIG_GENERIC_IOMAP && CONFIG_INDIRECT_PIO	2018-09-14 09:49:21 +01:00
clocksource
crypto
drm	drm: fix drm_drv_uses_atomic_modeset on non modesetting drivers.	2018-09-18 11:17:06 +02:00
dt-bindings	ARM: SoC: late updates	2018-08-25 14:12:36 -07:00
keys
kvm	KVM: arm/arm64: vgic-v3: Add core support for Group0 SGIs	2018-08-12 12:06:34 +01:00
linux	Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf	2018-10-01 15:41:01 -07:00
math-emu
media	- New Drivers	2018-08-20 15:38:44 -07:00
memory
misc
net	tcp/dccp: fix lockdep issue when SYN is backlogged	2018-10-01 15:42:13 -07:00
pcmcia	pcmcia: remove long deprecated pcmcia_request_exclusive_irq() function	2018-08-18 12:30:42 -07:00
ras
rdma	Second merge window update	2018-08-23 15:34:48 -07:00
scsi	SCSI misc on 20180815	2018-08-15 22:06:26 -07:00
soc
sound	ASoC: Fixes for v4.19	2018-09-17 18:59:21 +02:00
target
trace	rxrpc: Fix error distribution	2018-09-28 10:33:17 +01:00
uapi	Revert "uapi/linux/keyctl.h: don't use C++ reserved keyword as a struct member name"	2018-09-25 13:28:58 +02:00
video	fbdev changes for v4.19:	2018-08-23 15:44:58 -07:00
xen	xen/balloon: add runtime control for scrubbing ballooned out pages	2018-09-14 08:51:10 -04:00