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| author | Alexei Starovoitov <ast@plumgrid.com> | 2015-04-27 14:40:37 -0700 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2015-05-17 19:12:32 -0400 |
| commit | 2611e2418ca8be78f87cd8f727aa92f04fdcfd21 (patch) | |
| tree | ffd9ed751bbd3e4034c74cf98de13021a4fbaba9 /arch/mips/bcm63xx/prom.c | |
| parent | 7f1a6ae73b5c2d24b21d9a27928ceacef3a9a939 (diff) | |
bpf: fix 64-bit divide
[ Upstream commit 876a7ae65b86d8cec8efe7d15d050ac61116874e ]
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>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'arch/mips/bcm63xx/prom.c')
0 files changed, 0 insertions, 0 deletions