bpf: fix missing error return in check_stack_boundary()

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From: Jann Horn <jannh@google.com>

Prevent indirect stack accesses at non-constant addresses, which would
permit reading and corrupting spilled pointers.

Fixes: f1174f77b5 ("bpf/verifier: rework value tracking")
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Daniel Borkmann 2017-12-22 16:23:08 +01:00 • committed by Greg Kroah-Hartman

parent 6c8e098d03

commit 2120fca0ec

1 changed files with 1 additions and 0 deletions

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kernel/bpf/verifier.c

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