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Fixed out of bounds read in AVX512VBMI version of fdr_exec_fat_teddy … (#333)

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Fixed out of bounds read in AVX512VBMI version of fdr_exec_fat_teddy (#322)

  * Replaced the 32 byte read with a properly truncated mapped read
  * Added a unit test

Co-authored-by: Rafał Dowgird <rafal.dowgird@rtbhouse.com>
This commit is contained in:
Rafał Dowgird
2025-05-18 10:01:10 +02:00
committed by GitHub
parent eecad13b13
commit 4f40db0755
2 changed files with 26 additions and 2 deletions
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2
src/fdr/teddy_fat.cpp
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@@ -283,7 +283,7 @@ hwlm_error_t fdr_exec_fat_teddy_512vbmi_templ(const struct FDR *fdr,
if (likely(ptr + loopBytes <= buf_end)) {
u64a k0 = FAT_TEDDY_VBMI_CONF_MASK_HEAD;
m512 p_mask0 = set_mask_m512(~((k0 << 32) | k0));
m512 r_0 = prep_conf_fat_teddy_512vbmi_templ<NMSK>(&lo_mask, dup_mask, sl_msk, set2x256(loadu256(ptr)));
m512 r_0 = prep_conf_fat_teddy_512vbmi_templ<NMSK>(&lo_mask, dup_mask, sl_msk, set2x256(loadu_maskz_m256(k0, ptr)));
r_0 = or512(r_0, p_mask0);
CONFIRM_FAT_TEDDY_512(r_0, 16, 0, VECTORING, ptr);