buglwIP - A Lightweight TCP/IP stack - Bugs: bug #65732, Infinity "for" loop in...


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bug #65732: Infinity "for" loop in mkfsdata.c

Submitter:  Alexey <spider_vc>
Submitted:  Mon 13 May 2024 10:30:47 AM UTC
Category:  apps Severity:  3 - Normal
Item Group:  None Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open Planned Release:  None
lwIP version:  git head

Mon 13 May 2024 10:30:47 AM UTC, original submission:  

in file:

  src_offset = 0;
  for (offset = hdr_len; ; offset += len) {
    unsigned short chksum;
    const void *data = (const void *)&file_data[src_offset];
    len = LWIP_MIN(chunk_size, (int)file_size - src_offset);
    if (len == 0) {
    chksum = ~inet_chksum(data, (u16_t)len);
    /* add checksum for data */
    fprintf(struct_file, "{%d, 0x%04x, %"SZT_F"}," NEWLINE, offset, chksum, len);

loop condition is wrong. src_offset never changed and as result len never reach zero.

I think right condition will be like that:

   for (offset = hdr_len; ; src_offset += len) {

8 years old BUG....

Alexey <spider_vc>


(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

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