smb: integer overflow proof a size check#22001
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By using size_t for the vars instead of shorts. Pointed out by Zeropath
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Pull request overview
This PR hardens SMB response parsing in lib/smb.c against integer-overflow bypasses in a packet size/bounds check by widening the temporary length/offset variables used in the calculation.
Changes:
- Replace
unsigned shorttemporaries withsize_tfor SMB responselen/offvalues insmb_request_state(). - Ensure the subsequent bounds arithmetic (
off + sizeof(unsigned int) + len) is performed in a type wide enough to prevent 16-bit wraparound.
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By using size_t for the vars instead of shorts.
Pointed out by Zeropath