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| Anonymous | Login | Signup for a new account | 11-10-2008 10:46 PST |
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| ID | Category | Severity | Reproducibility | Date Submitted | Last Update | ||||
| 0000309 | [BusyBox] Networking Support | minor | always | 06-25-05 13:08 | 01-10-06 20:40 | ||||
| Reporter | Wutje | View Status | public | ||||||
| Assigned To | BusyBox | ||||||||
| Priority | normal | Resolution | fixed | ||||||
| Status | closed | Product Version | 1.00 | ||||||
| Summary | 0000309: ping -s n localhost , with n smaller then 6 results in wrong timing results | ||||||||
| Description |
ping -s n localhost , with n smaller then 6 results in wrong timing results The error is the biggest when using -s 1, Example: ping -s 1 localhost PING localhost.localdomain (127.0.0.1): 1 data bytes 9 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=416459759.4 ms 9 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=416459753.1 ms 9 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=416459753.1 ms 9 bytes from 127.0.0.1: icmp_seq=3 ttl=64 time=416459753.1 ms |
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| Additional Information |
This seems like an overflow problem. The busybox is running on a asus wl-500g router with custom firmware. Using version: BusyBox v1.00 (2005.05.11-18:29+0000) |
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Notes |
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(0000713) montezuma 11-29-05 13:46 |
In networking/ping.c there appears to be a bug that is causing this issue, or worse on some architectures/toolschains. In the gettimeofday call the result is placed into the icmp data. The size of struct timeval is 8. packet is declared as "char packet[datalen + 8];", guess what happens if the datalen is < 8. The minimum datalen size should be the size of struct timeval. gettimeofday((struct timeval *) &packet[8], NULL); static void sendping(int junk) { struct icmp *pkt; int i; char packet[datalen + 8]; pkt = (struct icmp *) packet; pkt->icmp_type = ICMP_ECHO; pkt->icmp_code = 0; pkt->icmp_cksum = 0; pkt->icmp_seq = htons(ntransmitted++); pkt->icmp_id = myid; CLR(ntohs(pkt->icmp_seq) % MAX_DUP_CHK); gettimeofday((struct timeval *) &packet[8], NULL); |
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(0000922) landley 01-10-06 20:40 |
svn 13234 |
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Issue History |
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| Date Modified | Username | Field | Change |
| 06-25-05 13:08 | Wutje | New Issue | |
| 11-29-05 13:46 | montezuma | Note Added: 0000713 | |
| 11-29-05 13:46 | montezuma | Issue Monitored: montezuma | |
| 01-10-06 20:40 | landley | Status | assigned => closed |
| 01-10-06 20:40 | landley | Note Added: 0000922 | |
| 01-10-06 20:40 | landley | Resolution | open => fixed |
| 01-10-06 20:40 | landley | Fixed in Version | => svn |
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