Re: [bwm-tools-tech] Fedora core5 segmentation fault

[Nigel K. <nk...@lb...>]

Good day,

> Now that I updated (fresh install) my machine from Fedora Core 4 to 
> Core 5, I get segmentation faults after updating my kernel (standard 
> yum update).  I allready updated 2 kernel versions, but only with the 
> stock 2.6.15-1.2054 bwm_tools works.

Interesting.... so its a updated FC4 installation?

>
> bwm_firewall -f
> BWM Firewall v0.2.3 - Copyright (c) 2003-2006 Linux Based Systems Design
>
> Loading configuration from "/etc/bwm_tools/firewall.xml"...
> Segmentation fault

Ok ... bwm_firewall isn't that nasty, shouldn't be too hard to track 
the bug and mash it with a sledge hammer.


> The last part when running strace;
>
> mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 
> -1, 0) = 0xb7fa1000
> write(1, "BWM Firewall v0.2.3 - Copyright "..., 74BWM Firewall v0.2.3 
> - Copyright (c) 2003-2006 Linux Based Systems Design
>
> ) = 74
> write(1, "Loading configuration from \"/etc"..., 60Loading 
> configuration from "/etc/bwm_tools/firewall.xml"...
> ) = 60
> futex(0x4838b8, FUTEX_WAKE, 2147483647) = 0
> stat64("/etc/bwm_tools/firewall.xml", {st_mode=S_IFREG|0644, 
> st_size=19773, ...}) = 0
> brk(0)                                  = 0x94a9000
> brk(0x94ca000)                          = 0x94ca000
> stat64("/etc/bwm_tools/firewall.xml", {st_mode=S_IFREG|0644, 
> st_size=19773, ...}) = 0
> stat64("/etc/bwm_tools/firewall.xml", {st_mode=S_IFREG|0644, 
> st_size=19773, ...}) = 0
> stat64("/etc/bwm_tools/firewall.xml", {st_mode=S_IFREG|0644, 
> st_size=19773, ...}) = 0
> open("/etc/bwm_tools/firewall.xml", O_RDONLY) = 3
> fstat64(3, {st_mode=S_IFREG|0644, st_size=19773, ...}) = 0
> mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 
> -1, 0) = 0xb7fa0000
> read(3, "<firewall>\n#\n# Global configurat"..., 16384) = 16384
> _llseek(3, 0, [16384], SEEK_CUR)        = 0
> _llseek(3, 0, [0], SEEK_SET)            = 0
> read(3, "<firewall>\n#\n# Global configurat"..., 4096) = 4096
> read(3, "               </class>\n\t\t<class"..., 4096) = 4096
> read(3, "0\" dst-iface=\"eth0\"/>\n          "..., 4096) = 4096
> read(3, "                            <rul"..., 4096) = 4096
> read(3, "                 <rule target=\"a"..., 4096) = 3389
> read(3, "", 4096)                       = 0
> read(3, "", 4096)                       = 0
> close(3)                                = 0
> munmap(0xb7fa0000, 4096)                = 0
> gettimeofday({1146142654, 659695}, NULL) = 0
> --- SIGSEGV (Segmentation fault) @ 0 (0) ---
> +++ killed by SIGSEGV +++
> Process 16358 detached

Could you build BWM Tools with debugging support and run it through gdb 
for me and send me the output.


> And this happens now with kernel 2.6.16-1.2080_FC5smp, the strace 
> output doesn't mean anything to me, perhaps someone likes to see the 
> complete output.  Anyway, I never had a problem that I know of with 
> Fedora core 4, and the bwmd and bwm_graph run without problems.  
> re-installing doesn't solve it as well.

I think its some incompatibility, the gdb output above should show the 
line number causing the segfault.


-Nigel