]> git.baikalelectronics.ru Git - kernel.git/commit
bpf: don't check spilled reg state for non-STACK_SPILLed type slots
authorDaniel Borkmann <daniel@iogearbox.net>
Sat, 10 Jun 2017 22:50:41 +0000 (00:50 +0200)
committerDavid S. Miller <davem@davemloft.net>
Sat, 10 Jun 2017 23:05:45 +0000 (19:05 -0400)
commit74fee694c48b4db4456a12e9ba7971517a3f4195
tree4a44563771a6f4cd9704d34d840f8c02c86c22da
parent7e622c548896ec25a53eedcc66c7ec5726ef33a7
bpf: don't check spilled reg state for non-STACK_SPILLed type slots

spilled_regs[] state is only used for stack slots of type STACK_SPILL,
never for STACK_MISC. Right now, in states_equal(), even if we have
old and current stack state of type STACK_MISC, we compare spilled_regs[]
for that particular offset. Just skip these like we do everywhere else.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
kernel/bpf/verifier.c