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authorStefano Brivio <sbrivio@redhat.com>2019-03-08 16:40:57 +0100
committerDavid S. Miller <davem@davemloft.net>2019-03-08 11:27:21 -0800
commitad6c9986bcb627c7c22b8f9e9a934becc27df87c (patch)
tree5056ffd00fa5c22c0d80b8f65e432f21af5db59f /drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c
parentrxrpc: Fix client call connect/disconnect race (diff)
downloadlinux-dev-ad6c9986bcb627c7c22b8f9e9a934becc27df87c.tar.xz
linux-dev-ad6c9986bcb627c7c22b8f9e9a934becc27df87c.zip
vxlan: Fix GRO cells race condition between receive and link delete
If we receive a packet while deleting a VXLAN device, there's a chance vxlan_rcv() is called at the same time as vxlan_dellink(). This is fine, except that vxlan_dellink() should never ever touch stuff that's still in use, such as the GRO cells list. Otherwise, vxlan_rcv() crashes while queueing packets via gro_cells_receive(). Move the gro_cells_destroy() to vxlan_uninit(), which runs after the RCU grace period is elapsed and nothing needs the gro_cells anymore. This is now done in the same way as commit 8e816df87997 ("geneve: Use GRO cells infrastructure.") originally implemented for GENEVE. Reported-by: Jianlin Shi <jishi@redhat.com> Fixes: 58ce31cca1ff ("vxlan: GRO support at tunnel layer") Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Reviewed-by: Sabrina Dubroca <sd@queasysnail.net> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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