Guillaume Nault 0992d67bc2 mpls: drop skb's dst in mpls_forward() ... Commit 394de110a7 ("net: Added pointer check for dst->ops->neigh_lookup in dst_neigh_lookup_skb") added a test in dst_neigh_lookup_skb() to avoid a NULL pointer dereference. The root cause was the MPLS forwarding code, which doesn't call skb_dst_drop() on incoming packets. That is, if the packet is received from a collect_md device, it has a metadata_dst attached to it that doesn't implement any dst_ops function. To align the MPLS behaviour with IPv4 and IPv6, let's drop the dst in mpls_forward(). This way, dst_neigh_lookup_skb() doesn't need to test ->neigh_lookup any more. Let's keep a WARN condition though, to document the precondition and to ease detection of such problems in the future. Signed-off-by: Guillaume Nault <gnault@redhat.com> Link: https://lore.kernel.org/r/f8c2784c13faa54469a2aac339470b1049ca6b63.1604102750.git.gnault@redhat.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>		2020-11-03 12:55:53 -08:00
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acpi	pci-v5.10-changes	2020-10-22 12:41:00 -07:00
asm-generic	vmlinux.lds.h: Keep .ctors.* with .ctors	2020-10-27 11:13:41 -07:00
clocksource
crypto
drm
dt-bindings	ARM: Devicetree updates	2020-10-24 10:44:18 -07:00
keys
kunit	treewide: Convert macro and uses of __section(foo) to __section("foo")	2020-10-25 14:51:49 -07:00
kvm	ARM:	2020-10-23 11:17:56 -07:00
linux	net: add kcov handle to skb extensions	2020-11-02 18:01:34 -08:00
math-emu
media	ARM: SoC platform updates	2020-10-24 10:33:08 -07:00
memory
misc
net	mpls: drop skb's dst in mpls_forward()	2020-11-03 12:55:53 -08:00
pcmcia
ras
rdma	RDMA: Add rdma_connect_locked()	2020-10-28 09:14:49 -03:00
scsi	SCSI misc on 20201023	2020-10-23 16:19:02 -07:00
soc	net: mscc: ocelot: deny changing the native VLAN from the prepare phase	2020-11-02 17:09:07 -08:00
sound
target
trace	afs: Fix afs_invalidatepage to adjust the dirty region	2020-10-29 13:53:04 +00:00
uapi	net: bridge: mcast: add support for raw L2 multicast groups	2020-10-30 17:49:19 -07:00
vdso
video
xen	xen: branch for v5.10-rc1c	2020-10-25 10:55:35 -07:00