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(parent: 7de0258) | patch
bpf: allow for tailcalls in BPF subprograms for x64 JIT
authorMaciej Fijalkowski <maciej.fijalkowski@intel.com>
Wed, 16 Sep 2020 21:10:09 +0000 (23:10 +0200)
committerAlexei Starovoitov <ast@kernel.org>
Fri, 18 Sep 2020 02:56:06 +0000 (19:56 -0700)
commitec75b924044282496f9a0ca041b631321cdc9701
treeb22399138c4b4c90c745d0f5ac604c786ed3a1dbtree | snapshot
parent7de02587605d2a2fca0d8282ed2855e7f3f262adcommit | diff
bpf: allow for tailcalls in BPF subprograms for x64 JIT

Relax verifier's restriction that was meant to forbid tailcall usage
when subprog count was higher than 1.

Also, do not max out the stack depth of program that utilizes tailcalls.

Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
kernel/bpf/verifier.c diff | blob | history
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