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author | Gianluca Borello <g.borello@gmail.com> | 2017-01-09 10:19:48 -0800 |
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committer | David S. Miller <davem@davemloft.net> | 2017-01-09 16:56:27 -0500 |
commit | f0318d01b694485af9678a4e120328ae3555be6d (patch) | |
tree | a5346893ba6a94ecab7394d57bbabd730e1bf59f /tools/nfsd | |
parent | 5722569bb9c3bd922c4f10b5b2912fe88c255312 (diff) | |
download | op-kernel-dev-f0318d01b694485af9678a4e120328ae3555be6d.zip op-kernel-dev-f0318d01b694485af9678a4e120328ae3555be6d.tar.gz |
bpf: allow adjusted map element values to spill
commit 484611357c19 ("bpf: allow access into map value arrays")
introduces the ability to do pointer math inside a map element value via
the PTR_TO_MAP_VALUE_ADJ register type.
The current support doesn't handle the case where a PTR_TO_MAP_VALUE_ADJ
is spilled into the stack, limiting several use cases, especially when
generating bpf code from a compiler.
Handle this case by explicitly enabling the register type
PTR_TO_MAP_VALUE_ADJ to be spilled. Also, make sure that min_value and
max_value are reset just for BPF_LDX operations that don't result in a
restore of a spilled register from stack.
Signed-off-by: Gianluca Borello <g.borello@gmail.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/nfsd')
0 files changed, 0 insertions, 0 deletions