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(parent: b34fe28) | patch
bpf: fix missing error return in check_stack_boundary()
authorJann Horn <jannh@google.com>
Tue, 19 Dec 2017 04:11:57 +0000 (20:11 -0800)
committerBen Hutchings <ben@decadent.org.uk>
Fri, 22 Dec 2017 14:12:23 +0000 (14:12 +0000)
commitb051d0a5bca367dbafe5edf8e3aab9c9c9ce59ae
tree3864051893b8b77370b7031ae3023bf29d040ef2tree | snapshot
parentb34fe28640a78b37508b42cbe8e52fa4d2832903commit | diff
bpf: fix missing error return in check_stack_boundary()

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

Fixes: f1174f77b50c ("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>
Gbp-Pq: Topic bugfix/all
Gbp-Pq: Name bpf-fix-missing-error-return-in-check_stack_boundary.patch
kernel/bpf/verifier.c diff | blob | history
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