diff options
| -rw-r--r-- | kernel/bpf/verifier.c | 14 |
1 files changed, 0 insertions, 14 deletions
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index e2fcea860755..d218516c3b33 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -2554,20 +2554,6 @@ static void __reg_deduce_mixed_bounds(struct bpf_reg_state *reg) reg->smin_value = max_t(s64, reg->smin_value, new_smin); reg->smax_value = min_t(s64, reg->smax_value, new_smax); - /* if s32 can be treated as valid u32 range, we can use it as well */ - if ((u32)reg->s32_min_value <= (u32)reg->s32_max_value) { - /* s32 -> u64 tightening */ - new_umin = (reg->umin_value & ~0xffffffffULL) | (u32)reg->s32_min_value; - new_umax = (reg->umax_value & ~0xffffffffULL) | (u32)reg->s32_max_value; - reg->umin_value = max_t(u64, reg->umin_value, new_umin); - reg->umax_value = min_t(u64, reg->umax_value, new_umax); - /* s32 -> s64 tightening */ - new_smin = (reg->smin_value & ~0xffffffffULL) | (u32)reg->s32_min_value; - new_smax = (reg->smax_value & ~0xffffffffULL) | (u32)reg->s32_max_value; - reg->smin_value = max_t(s64, reg->smin_value, new_smin); - reg->smax_value = min_t(s64, reg->smax_value, new_smax); - } - /* Here we would like to handle a special case after sign extending load, * when upper bits for a 64-bit range are all 1s or all 0s. * |