selftests/bpf: Test imprecise scalar kptr stores

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Add a verifier regression where an imprecise zero scalar reaches a kptr
store first and a nonzero scalar reaches the same instruction on a second
path.

Without the corresponding verifier fix, the second path is pruned and the
program is unexpectedly accepted. With the fix, the scalar range is
compared and the invalid store is rejected.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20260904104203.345917-7-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Kumar Kartikeya Dwivedi 2026-09-04 12:41:57 +02:00 • committed by Alexei Starovoitov

parent ecdc504379

commit 9dcddf30ac

1 changed files with 37 additions and 0 deletions

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

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