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author | Haiyang Zhang <haiyangz@microsoft.com> | 2020-02-06 23:01:05 +0100 |
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committer | David S. Miller <davem@davemloft.net> | 2020-02-07 11:33:01 +0100 |
commit | 184367dce4f744bde54377203305ccc8889aa79f (patch) | |
tree | c2d9b5c2ef577f04482af7065944b71f5ddc0fe0 /drivers/net/vsockmon.c | |
parent | Merge branch 'taprio-Some-fixes' (diff) | |
download | linux-184367dce4f744bde54377203305ccc8889aa79f.tar.xz linux-184367dce4f744bde54377203305ccc8889aa79f.zip |
hv_netvsc: Fix XDP refcnt for synthetic and VF NICs
The caller of XDP_SETUP_PROG has already incremented refcnt in
__bpf_prog_get(), so drivers should only increment refcnt by
num_queues - 1.
To fix the issue, update netvsc_xdp_set() to add the correct number
to refcnt.
Hold a refcnt in netvsc_xdp_set()’s other caller, netvsc_attach().
And, do the same in netvsc_vf_setxdp(). Otherwise, every time when VF is
removed and added from the host side, the refcnt will be decreased by one,
which may cause page fault when unloading xdp program.
Fixes: 351e1581395f ("hv_netvsc: Add XDP support")
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/vsockmon.c')
0 files changed, 0 insertions, 0 deletions