https://github.com/torvalds/linux
Revision 95782bf434437b3292f5cb9ce21b53bdbc1beda1 authored by Markos Chandras on 25 June 2014, 08:37:21 UTC, committed by Ralf Baechle on 26 June 2014, 09:48:22 UTC
Remove BUG_ON() if the shift immediate is >=32 to avoid kernel crashes
due to malicious user input. If the shift immediate is >= 32,
we simply load the destination register with 0 since only
32-bit instructions are used by JIT so this will do the
correct thing even on MIPS64.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: netdev@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7179/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
1 parent e5bb48b
History
Tip revision: 95782bf434437b3292f5cb9ce21b53bdbc1beda1 authored by Markos Chandras on 25 June 2014, 08:37:21 UTC
MIPS: BPF: Prevent kernel fall over for >=32bit shifts
Tip revision: 95782bf
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