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(parent: 1a0e1ca) | patch
bpf: perf_event progs should only use preallocated maps
authorAlexei Starovoitov <ast@fb.com>
Fri, 2 Sep 2016 01:37:23 +0000 (18:37 -0700)
committerDavid S. Miller <davem@davemloft.net>
Fri, 2 Sep 2016 17:46:44 +0000 (10:46 -0700)
commit0333dd708e4e7e2250e070f845d827a179742295
tree6c197edb2fc2040e8069ff372baebcda5770ba25tree | snapshot
parent1a0e1ca0f723910b9ca9ac875ee2efa9a8cf4f36commit | diff
bpf: perf_event progs should only use preallocated maps

Make sure that BPF_PROG_TYPE_PERF_EVENT programs only use
preallocated hash maps, since doing memory allocation
in overflow_handler can crash depending on where nmi got triggered.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
kernel/bpf/verifier.c diff | blob | history
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