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| author | Mark Johnston <markj@FreeBSD.org> | 2022-04-05 22:51:19 +0000 |
|---|---|---|
| committer | Ed Maste <emaste@FreeBSD.org> | 2022-04-05 22:59:08 +0000 |
| commit | 53f72209479885dfa6a7e6ed68cbc82c68464f4b (patch) | |
| tree | 52fb1642b685c2c2fbb170d17248845f1fc7ca21 | |
| parent | 7b9d8e33bc4ee0b8cc22ab28a1f09a062e103bd5 (diff) | |
| download | src-53f72209479885dfa6a7e6ed68cbc82c68464f4b.tar.gz src-53f72209479885dfa6a7e6ed68cbc82c68464f4b.zip | |
bhyve: validate e82545 checksum offset field
Reported by: Mehdi Talbi, Synacktiv
(cherry picked from commit b0aa20bec5db244980a0248e24dd6b8e1e68c4d0)
| -rw-r--r-- | usr.sbin/bhyve/pci_e82545.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/usr.sbin/bhyve/pci_e82545.c b/usr.sbin/bhyve/pci_e82545.c index d0b4fb9e466f..76f2839fba31 100644 --- a/usr.sbin/bhyve/pci_e82545.c +++ b/usr.sbin/bhyve/pci_e82545.c @@ -1278,9 +1278,7 @@ e82545_transmit(struct e82545_softc *sc, uint16_t head, uint16_t tail, goto done; } if (sc->esc_txctx.cmd_and_length & E1000_TXD_CMD_TCP) { - if (hdrlen < ckinfo[1].ck_start + 14 || - (ckinfo[1].ck_valid && - hdrlen < ckinfo[1].ck_off + 2)) { + if (hdrlen < ckinfo[1].ck_start + 14) { WPRINTF("TSO hdrlen too small for TCP fields " "(%d) -- dropped", hdrlen); goto done; @@ -1292,6 +1290,11 @@ e82545_transmit(struct e82545_softc *sc, uint16_t head, uint16_t tail, goto done; } } + if (ckinfo[1].ck_valid && hdrlen < ckinfo[1].ck_off + 2) { + WPRINTF("TSO hdrlen too small for TCP/UDP fields " + "(%d) -- dropped", hdrlen); + goto done; + } } /* Allocate, fill and prepend writable header vector. */ |