From: Andrei Matei <andreimatei1@gmail.com>
To: bpf@vger.kernel.org, andrii.nakryiko@gmail.com, sunhao.th@gmail.com
Cc: Andrei Matei <andreimatei1@gmail.com>
Subject: [PATCH bpf v3 0/2] bpf: fix verification of indirect var-off stack access
Date: Tue, 5 Dec 2023 14:32:48 -0500 [thread overview]
Message-ID: <20231205193250.260862-1-andreimatei1@gmail.com> (raw)
V2 to V3:
- simplify checks for max_off (don't call
check_stack_slot_within_bounds for it)
- append a commit to protect against overflow in the addition of the
register and the offset
V1 to V2:
- fix max_off calculation for access size = 0
Andrei Matei (2):
bpf: fix verification of indirect var-off stack access
bpf: guard stack limits against 32bit overflow
kernel/bpf/verifier.c | 20 +++++++-------------
1 file changed, 7 insertions(+), 13 deletions(-)
--
2.39.2
next reply other threads:[~2023-12-05 19:33 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-05 19:32 Andrei Matei [this message]
2023-12-05 19:32 ` [PATCH bpf v3 1/2] bpf: fix verification of indirect var-off stack access Andrei Matei
2023-12-06 0:27 ` Eduard Zingerman
2023-12-05 19:32 ` [PATCH bpf v3 2/2] bpf: guard stack limits against 32bit overflow Andrei Matei
2023-12-05 23:35 ` [PATCH bpf v3 0/2] bpf: fix verification of indirect var-off stack access Eduard Zingerman
2023-12-06 0:08 ` Alexei Starovoitov
2023-12-06 16:57 ` Andrei Matei
2023-12-06 17:14 ` Eduard Zingerman
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