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| author | Andrii Nakryiko <andrii@kernel.org> | 2023-12-05 10:42:44 -0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2023-12-05 13:40:21 -0800 |
| commit | e322f0bcb8d371f4606eaf141c7f967e1a79bcb7 (patch) | |
| tree | 465b4dead3816fce4a5b27dafd7f566fb5b75da4 /security/selinux/hooks.c | |
| parent | b33ceb6a3d2ee07fdd836373383a6d4783581324 (diff) | |
bpf: preserve constant zero when doing partial register restore
Similar to special handling of STACK_ZERO, when reading 1/2/4 bytes from
stack from slot that has register spilled into it and that register has
a constant value zero, preserve that zero and mark spilled register as
precise for that. This makes spilled const zero register and STACK_ZERO
cases equivalent in their behavior.
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20231205184248.1502704-7-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'security/selinux/hooks.c')
0 files changed, 0 insertions, 0 deletions