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Commit f59bbfc2 authored by Alexei Starovoitov's avatar Alexei Starovoitov Committed by Daniel Borkmann
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bpf: Fix error path under memory pressure



Restore the 'if (env->cur_state)' check that was incorrectly removed during
code move. Under memory pressure env->cur_state can be freed and zeroed inside
do_check(). Hence the check is necessary.

Fixes: 51c39bb1 ("bpf: Introduce function-by-function verification")
Reported-by: default avatar <syzbot+b296579ba5015704d9fa@syzkaller.appspotmail.com>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarSong Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20200122024138.3385590-1-ast@kernel.org
parent 05d57f17
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