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| author | Björn Töpel | 2018-10-08 19:40:16 +0200 |
|---|---|---|
| committer | Daniel Borkmann | 2018-10-11 10:19:01 +0200 |
| commit | cee271678d0e3177a25d0fcb2fa5e051d48e4262 (patch) | |
| tree | b63781801b81ccc68cda0d24417764e90ec138c1 /tools/testing/selftests/net | |
| parent | bpf: do not blindly change rlimit in reuseport net selftest (diff) | |
| download | kernel-qcow2-linux-cee271678d0e3177a25d0fcb2fa5e051d48e4262.tar.gz kernel-qcow2-linux-cee271678d0e3177a25d0fcb2fa5e051d48e4262.tar.xz kernel-qcow2-linux-cee271678d0e3177a25d0fcb2fa5e051d48e4262.zip | |
xsk: do not call synchronize_net() under RCU read lock
The XSKMAP update and delete functions called synchronize_net(), which
can sleep. It is not allowed to sleep during an RCU read section.
Instead we need to make sure that the sock sk_destruct (xsk_destruct)
function is asynchronously called after an RCU grace period. Setting
the SOCK_RCU_FREE flag for XDP sockets takes care of this.
Fixes: fbfc504a24f5 ("bpf: introduce new bpf AF_XDP map type BPF_MAP_TYPE_XSKMAP")
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools/testing/selftests/net')
0 files changed, 0 insertions, 0 deletions