bpf: fix divides by zero

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[ upstream commit c366287ebd ]

Divides by zero are not nice, lets avoid them if possible.

Also do_div() seems not needed when dealing with 32bit operands,
but this seems a minor detail.

Fixes: bd4cf0ed33 ("net: filter: rework/optimize internal BPF interpreter's instruction set")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Eric Dumazet 2018-01-29 00:36:44 +01:00 • committed by Greg Kroah-Hartman

parent 3ea4247ec1

commit 6eca013bef

1 changed files with 2 additions and 2 deletions

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kernel/bpf/core.c

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