Linux ping bad address

Linux ping bad address

when i do a ping to any adress i get:

Код:

~ # ping 127.0.0.1 PING 127.0.0.1 (127.0.0.1) 56(84) bytes of data. ping: sendmsg: Bad address

Код:

~ # ping 8.8.8.8 PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data. ping: sendmsg: Bad address

Код:

~ # traceroute 8.8.8.8 traceroute to google-public-dns-a.google.com (8.8.8.8), 30 hops max, 38 byte packets 1 192.168.157.1 (192.168.157.1) 1.030 ms 2.046 ms 1.460 ms 2 ppp-default.m-online.net (82.135.16.28) 123.403 ms 103.157 ms 66.710 ms 3 ae0.rt-inxs-1.m-online.net (212.18.6.109) 103.412 ms 73.127 ms 75.039 ms 4 93.104.240.55 (93.104.240.55) 75.270 ms 94.051 ms 101.148 ms 5 209.85.252.215 (209.85.252.215) 82.355 ms 64.233.175.121 (64.233.175.121) 95.967 ms 209.85.253.113 (209.85.253.113) 95.576 ms ^C

Everything is working, it’s just strange.

Код:

Strace: write(1, «PING localhost (127.0.0.1) 56(84». 49) = 49 setsockopt(3, SOL_SOCKET, SO_TIMESTAMP, [1], 4) = 0 setsockopt(3, SOL_SOCKET, SO_SNDTIMEO, «\1\0\0\0\0\0\0\0», 8) = 0 setsockopt(3, SOL_SOCKET, SO_RCVTIMEO, «\1\0\0\0\0\0\0\0», 8) = 0 rt_sigaction(SIGINT, {0x804c840, [], SA_INTERRUPT}, NULL, 8) = 0 rt_sigaction(SIGALRM, {0x804c840, [], SA_INTERRUPT}, NULL, 8) = 0 rt_sigaction(SIGQUIT, {0x804bf30, [], SA_INTERRUPT}, NULL, 8) = 0 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 gettimeofday({1489525793, 277041}, NULL) = 0 ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo . }) = 0 ioctl(1, TIOCGWINSZ, {ws_row=71, ws_col=237, ws_xpixel=0, ws_ypixel=0}) = 0 gettimeofday({1489525793, 277129}, NULL) = 0 gettimeofday({1489525793, 277153}, NULL) = 0 sendmsg(3, {msg_name(16)={sa_family=AF_INET, sin_port=htons(0), sin_addr=inet_addr(«127.0.0.1»)}, msg_iov(1)=[{«\10\0pp\r\234\0\1!\\\310X\241:\4\0\10\t\n\v\f\r\16\17\20\21\22\23\24\25\26\27». 64}], msg_controllen=0, msg_flags=0}, 0) $ recvmsg(3, 0xbff08130, MSG_ERRQUEUE|MSG_DONTWAIT) = -1 EAGAIN (Resource temporarily unavailable) dup(2) = 4 fcntl64(4, F_GETFL) = 0x8002 (flags O_RDWR|O_LARGEFILE) fstat64(4, st_mode=S_IFCHR) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb77b3000 _llseek(4, 0, 0xbff08028, SEEK_CUR) = -1 ESPIPE (Illegal seek) write(4, «ping: sendmsg: Bad address\n», 27) = 27 close(4) = 0 munmap(0xb77b3000, 4096) = 0

Any ideas how to trace down to the problem?
Thanks for any hints.

I was about to guess an alias but the strace would prove that to be false.

Could it be anything related to this (vserver, old kernel):

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Busybox ping IP works, but hostname nslookup fails with «bad address»

Solution 1: Bad Address error means that the address location that you have given is invalid. Question: When I open a cygwin console I get the following message: hostname: : Bad address Furthermore when I try to ssh into a server I get this message: gethostname: Bad address Does anyone know what this might be about?

Busybox ping IP works, but hostname nslookup fails with «bad address»

I am compiling my own 3.14 kernel. I fear I may have left out some important networking feature to get DNS working.

I can’t resolve domain names. I can ping my DNS server. I can resolve using that DNS on other machines so I know it’s not the server.

~ # cat /etc/resolv.conf nameserver 192.168.13.5 ~ # nslookup google.com Server: 192.168.13.5 Address 1: 192.168.13.5 nslookup: can't resolve 'google.com' ~ # ping -c 1 google.com ping: bad address 'google.com' ~ # ping -c 1 192.168.13.5 PING 192.168.13.5 (192.168.13.5): 56 data bytes 64 bytes from 192.168.13.5: seq=0 ttl=128 time=0.382 ms --- 192.168.13.5 ping ststistics --- 1 packets transmitted, 1 packets recieved, 0% packet loss reound-trip min/avg/max = 0.382/0.382/0.382 ms 

Any ideas what I left out? here is my config: http://pastebin.com/vt4vGTgJ

If it’s not the kernel, what could I be missing? I am using busybox, statically linked. there are no shared libraries in this system.

The problem is with busybox. I switched to a precompiled version and did not have issues. I need to look into compilation options with it. Thanks for your help.

There are known issues with DNS functionality in statically-linked glibc programs (like busybox in this case), because libnss must be dynamically loaded. Building a uClibc toolchain and linking busybox against that would resolve this.

I resolved the same symptoms by editing: /etc/nsswitch.conf and adding DNS to the following line:

I ran into the same issue and it turns out that busybox is picky about the format for resolv.conf. There must be exactly one blank between the nameserver tag and the address for nslookup to work. In addition /etc/nsswitch.conf has to include dns for host.

[ busybox master (git hash 349d72c19) sysroot-glibc-linaro-2.25-2018.05-arm-linux-gnueabihf ]

root@4000000a:~# cat /etc/nsswitch.conf passwd: files compat shadow: files compat hosts: files dns compat 

Yes the question is old, but the current busybox still behaves this way.

[ I used xxd below to show the number of blanks in resolv.conf ]

root@4000000a:~# xxd /etc/resolv.conf 00000000: 6e61 6d65 7365 7276 6572 2020 382e 382e nameserver 8.8. 00000010: 382e 380a 8.8. root@4000000a:~# nslookup www.cnn.com nslookup: bad address ' 8.8.8.8' 

root@4000000a:~# xxd /etc/resolv.conf 00000000: 6e61 6d65 7365 7276 6572 2038 2e38 2e38 nameserver 8.8.8 00000010: 2e38 0a .8. root@4000000a:~# nslookup www.cnn.com Server: 8.8.8.8 Address: 8.8.8.8:53 Non-authoritative answer: www.cnn.com canonical name = turner-tls.map.fastly.net Name: turner-tls.map.fastly.net Address: 151.101.1.67 Name: turner-tls.map.fastly.net Address: 151.101.65.67 Name: turner-tls.map.fastly.net Address: 151.101.129.67 Name: turner-tls.map.fastly.net Address: 151.101.193.67 Non-authoritative answer: www.cnn.com canonical name = turner-tls.map.fastly.net Name: turner-tls.map.fastly.net Address: 2a04:4e42::323 Name: turner-tls.map.fastly.net Address: 2a04:4e42:200::323 Name: turner-tls.map.fastly.net Address: 2a04:4e42:400::323 Name: turner-tls.map.fastly.net Address: 2a04:4e42:600::323 

I’m not sure if this is the same problem I had or not, but I recently upgraded and old internal DNS server system from OpenBSD 3.8 to 5.6, and I lost the ability to resolve hosts with ping, but the host command was working. Turned out I had to add 127.0.0.1/8 to the match-clients directive in named in addition to the 192.168.0.0/16 which I already had there, and then it started to work properly after restarting named.

«BAD IP ADDRESS in DHCP 2019», BAD_ADDRESS usually indicates an address conflict. This means that the IP address in the lease distributed by the DHCP server has been used by …

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‘bad address’ error from copy_to_user

I am attempting to copy a custom struct from kernel space to user space. inside user space errno returns ‘bad address’. What is the usual cause of a bad address error?

if(copy_to_user(info, &kernel_info, sizeof(struct prinfo))) 

Bad Address error means that the address location that you have given is invalid. With the case you have above I would guess it is because you are passing a copy of info instead of a pointer to info ‘s memory location.

Looking at the docs, copy_to_user is defined as

copy_to_user(void __user * to, const void * from, unsigned long n); 

So unless your info variable is a pointer I would update your code to be:

if(copy_to_user(&info, &kernel_info, sizeof(struct prinfo)) ) < //some stuff here i guess >

Assuming that info is a pointer type and that info is pointing to a valid location it is still possible that info is pointing to an address that is not in user space which is required by the function.

I had a same problem while writing a small char driver. All I was doing wrong was the function copy_to_user returns non-zero on failure, so you have to do this..

if(copy_to_user(void *userbuf, void *kernelbuf, long len)) return -EFAULT; // Continue with code.. 

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Cygwin Bad Address

When I open a cygwin console I get the following message:

Furthermore when I try to ssh into a server I get this message:

Does anyone know what this might be about? I tried reinstalling ssh and reinstalling cygwin to no avail.

I believe this is a known problem affecting some 64-bit users with the latest version of Cygwin (1.7.29-2).

See the thread here: http://cygwin.com/ml/cygwin/2014-04/msg00132.html

I believe the only solution at this point is to download a recent snapshot, which has a patch for this.

You can get snapshots here: http://cygwin.com/snapshots

But read the directions first here: http://cygwin.com/faq.html#faq.setup.snapshots

The only way I could fix this was by installing the 32bit version of Cygwin, it’s worked perfectly on my 64bit system.

Chris’s method worked. I’m just going to put it in my words here.

This happened to me with Cygwin 64bit. I unplugged my laptop and at some point it crashed and restarted, it had a network issue wlan. I’m not sure the cause but suddenly I got that message «hostname: : Bad address» when going into cygwin. cygwin.bat runs .\bin\bash —login i and then I got that message

Judging by the solution that worked (replacing cygwin1.dll)

My guess is cygwin1.dll got corrupted, perhaps from an unexpected shutdown (as I just had one of those and was fine before).

Solution was, to replace cygwin1.dll with the latest one from the cygwin snapshots link.

Got the latest cygwin1.dll by clicking this link

Downloading cygwin1. dll.xz

Extracting cygwin1.dll from it with 7zip (though some may use tar within cygwin but I closed cygwin particularly as i’ll be replacing that file of cygwins)

made a copy of my existing cygwin1.dll and Copied cygwin1.dll over my existing cygwin1.dll

(I dragged the cygwin1.dll icon onto the command prompt to get the path to expand)

C:\cygwin\bin>move cygwin1.dll cygwinold1.dll 1 file(s) moved. C:\cygwin\bin>move C:\Users\harvey\Downloads\cygwin1-20141120.dll\cygwin1.dll . 1 file(s) moved. 

Then cygwin started fine no problems.

C — Getting «execvp error: Bad address» while using 2D, 3. execvp takes an array of pointers. You give it a 2D array. They are quite different beasts. For starters, the array of pointers given to execvp must be …

BAD address / this address is already in use

Now clients are not getting IP .

When i opened dhcp console ..its showing bad address along with this address is already in use..

After the DHCP client receives a lease from the DHCP server, the client sends an Address Resolution Protocol (ARP) request to the address that it has been assigned. If a reply to the ARP request is received, the client has detected a conflict and sends a dhcpdecline message to the DHCP server. The DHCP server attaches a BAD_ADDRESS value to the IP address in the scope for the length of the lease. The client then begins the lease process again, and is offered the next available address in the scope.

Likely an overlapping scope on another DHCP server (maybe authorised or rogue) or a PC with static IP that conflicts. This web page describes how to enable server conflict detection to help. If you have Dynamic DNS or WINS you can check those for reverse registrations of the IP. Also nbtstat -a to chase it down. Once you find the conflicting machine, check IPCONFIG /ALL to track down the DHCP server if it’s a DHCP client and not statically assigned. Some network monitoring for DHCP traffic will also track it down too

5.1.3 Bad Address Sytax error message, If you go into Outlook Preferences > Notifications & Sounds, click on the Mailbox sync error. Is this the bong sound you are hearing? If yes, then it …

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