Commit bbb7bace authored by Colin Ian King's avatar Colin Ian King Committed by Martin K. Petersen

snic: correctly check for array overrun on overly long version number

The snic version number is expected to be 4 decimals in the form like a
netmask string with each number stored in an element in array v.
However, there is an off-by-one check on the number of elements in v
allowing one to pass a 5 decimal version number causing v[4] to be
referenced, causing a buffer overrun.  Fix the off-by-one error by
comparing to i > 3 rather than 4.
Signed-off-by: default avatarColin Ian King <>
Reviewed-by: default avatarShane Seymour <>
Reviewed-by: default avatarEwan Milne <>
Signed-off-by: default avatarMartin K. Petersen <>
parent a6d24143
......@@ -75,7 +75,7 @@ snic_ver_enc(const char *s)
if (i > 4 || !isdigit(c))
if (i > 3 || !isdigit(c))
goto end;
v[i] = v[i] * 10 + (c - '0');
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