xfrm: Fix a race in the xdst pcpu cache.

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commit 76a4201191 upstream.

We need to run xfrm_resolve_and_create_bundle() with
bottom halves off. Otherwise we may reuse an already
released dst_enty when the xfrm lookup functions are
called from process context.

Fixes: c30d78c14a813db39a647b6a348b428 ("xfrm: add xdst pcpu cache")
Reported-by: Darius Ski <darius.ski@gmail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Acked-by: David Miller <davem@davemloft.net>,
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Steffen Klassert 2018-01-10 12:14:28 +01:00 • committed by Greg Kroah-Hartman

parent 19848ca7b7

commit ceab06885c

1 changed files with 7 additions and 1 deletions

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net/xfrm/xfrm_policy.c

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