vhost_net: validate sock before trying to put its fd

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commit b8f1f65882 upstream.

Sock will be NULL if we pass -1 to vhost_net_set_backend(), but when
we meet errors during ubuf allocation, the code does not check for
NULL before calling sockfd_put(), this will lead NULL
dereferencing. Fixing by checking sock pointer before.

Fixes: bab632d69e ("vhost: vhost TX zero-copy support")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

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Jason Wang 2018-06-21 13:11:31 +08:00 • committed by Ben Hutchings

parent fca8bb1d7f

commit 81aca22428

1 changed files with 2 additions and 1 deletions

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drivers/vhost/net.c

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