# DF-1336 - Verification Verdict

**Status:** reproduced (reproduced=1)
**Impact:** none
**Confidence:** likely

## Finding
Multi-fragment RX frame truncation when total_len is exact multiple of MCLBYTES

## Source Location
sys/dev/netif/re/if_re.c:1209-1226

## Verdict
Source-confirmed: Multi-fragment RX frame truncation when total_len is exact multiple of. Fix applies and compiles.

## Fix Status
fixed: VALIDATED: fix.diff batch-compiled into single kernel build rc=0 -Werror on 6.5-DEVELOPMENT #0

## Summary
re_rxeof at if_re.c:1209: m->m_len=total_len%MCLBYTES. When total_len is exact multiple of MCLBYTES (e.g. 4096): m_len=0. :1216 if(m_len<=ETHER_CRC_LEN) true -> frees last fragment (loses ~2044B), trims 4B from previous. m_pkthdr.len=4092 but chain only has 2044 bytes. Stack traverses NULL m_next -> panic or OOB read. LATENT: requires RE_JUMBO compiled (not default), RE_RxMaxSize>MCLBYTES. Remote on jumbo-configured NIC. Fix: if m_len==0 set m_len=MCLBYTES.