Merge branch 'bpf-fix-verification-of-indirect-var-off-stack-access'

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Andrei Matei says:

====================
bpf: fix verification of indirect var-off stack access

V4 to V5:
  - split the test into a separate patch

V3 to V4:
  - include a test per Eduard's request
  - target bpf-next per Alexei's request (patches didn't change)

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
====================

Link: https://lore.kernel.org/r/20231207041150.229139-1-andreimatei1@gmail.com
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>

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This commit is contained in:

Andrii Nakryiko 2023-12-07 10:57:36 -08:00

parent 2146f7fe6e 1d38a9ee81

commit 483af466e4

2 changed files with 36 additions and 13 deletions

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20

kernel/bpf/verifier.c

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29

tools/testing/selftests/bpf/progs/verifier_var_off.c

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