diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/kernel/sclp.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/s390/kernel/sclp.c b/arch/s390/kernel/sclp.c index 7453243..53e391f 100644 --- a/arch/s390/kernel/sclp.c +++ b/arch/s390/kernel/sclp.c @@ -132,16 +132,21 @@ static void _sclp_print_lm(const char *str) 0x10, 0x00, /* 4 */ 0x00, 0x00, 0x00, 0x00 /* 6 */ }; - unsigned char *ptr, ch; + unsigned char *ptr, *end_ptr, ch; unsigned int count; memcpy(_sclp_work_area, write_head, sizeof(write_head)); ptr = _sclp_work_area + sizeof(write_head); + end_ptr = _sclp_work_area + sizeof(_sclp_work_area) - 1; do { + if (ptr + sizeof(write_mto) > end_ptr) + break; memcpy(ptr, write_mto, sizeof(write_mto)); for (count = sizeof(write_mto); (ch = *str++) != 0; count++) { if (ch == 0x0a) break; + if (ptr > end_ptr) + break; ptr[count] = _ascebc[ch]; } /* Update length fields in mto, mdb, evbuf and sccb */ |
