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| author | Alexei Starovoitov <ast@plumgrid.com> | 2015-04-28 00:40:37 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-04-28 06:11:49 +0300 |
| commit | 876a7ae65b86d8cec8efe7d15d050ac61116874e (patch) | |
| tree | 6458c36e3f2c0cd2f2ca7c1dfcee6fc5b9c7dd19 /net | |
| parent | 8e046d68ba719a5bb95912c154c6314472edccfa (diff) | |
| download | linux-876a7ae65b86d8cec8efe7d15d050ac61116874e.tar.xz | |
bpf: fix 64-bit divide
ALU64_DIV instruction should be dividing 64-bit by 64-bit,
whereas do_div() does 64-bit by 32-bit divide.
x64 and arm64 JITs correctly implement 64 by 64 unsigned divide.
llvm BPF backend emits code assuming that ALU64_DIV does 64 by 64.
Fixes: 89aa075832b0 ("net: sock: allow eBPF programs to be attached to sockets")
Reported-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
0 files changed, 0 insertions, 0 deletions