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Fix a signed shift overflow in sha256_transform() #113

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vitalif merged 1 commits from koolkhel/vitastor:ubsan-sha256-shift into master 2026-10-27 23:53:59 +03:00
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Author SHA1 Message Date
Yury Luneff
f7603fa87b Fix a signed shift overflow in sha256_transform() 
The message bytes were promoted to int before the shift by 24, which
overflows for every byte of 0x80 and above: undefined behaviour that
UBSan reports. Widen them to WORD first. The digest does not change.
 2026-10-27 10:19:35 +03:00