RC.39 (and 40) 'argus' segfault on Fedora Core 6
Michael Hornung
hornung at cac.washington.edu
Wed Feb 28 11:04:17 EST 2007
(gdb) print ArgusMallocList
$1 = (struct ArgusMemoryList *) 0x9e1d538
(gdb) print ArgusMallocList->end
$2 = (struct ArgusMemoryHeader *) 0x54a96bb8
(gdb) print ArgusMallocList->end->nxt
Cannot access memory at address 0x54a96bb8
-Mike
On Tue, 27 Feb 2007 at 23:30, Carter Bullard wrote:
|This is very odd. When you get to someplace in gdb, with a Segmentation
|fault, try to find out what variable is having problems by printing the actual
|values:
|
| (gdb) print ArgusMallocList
| (gdb) print ArgusMallocList->end
| (gdb) print ArgusMallocList->end->nxt
|
|I would guess that ArgusMallocList doesn't exist, or is corrupted.
|This can happen for a number of reasons, but it may be useful to
|try to get a packet trace that generates your errors. Maybe a
|bit of data, but if we can replicate the problem, we can fix it.
|
|Carter
|
|
|
|Michael Hornung wrote:
|
|> On Tue, 27 Feb 2007 at 14:04, Peter Van Epp wrote:
|>
|> |touch .devel
|> |touch .debug
|> |./configure
|> |make clean |make
|> |
|> |in the top argus directory it will compile with debug symbols which will
|> |get interesting data if you type "where" at the gdb prompt.
|>
|>
|> # gdb /usr/local/sbin/argus
|> GNU gdb Red Hat Linux (6.5-15.fc6rh)
|> ...
|> (gdb) run 2>run.log
|> Starting program: /usr/local/sbin/argus 2>run.log
|>
|> Program received signal SIGSEGV, Segmentation fault.
|> 0x08075df8 in ArgusFreeListRecord (buf=0xaa96df0) at argus_util.c:1362
|> 1362 ArgusMallocList->end->nxt = mem;
|>
|>
|> (gdb) where
|> #0 0x08075df8 in ArgusFreeListRecord (buf=0xaa96df0) at argus_util.c:1362
|> #1 0x0805a744 in ArgusWriteOutSocket (output=0x9e1b2e0, client=0x9e1b2f4)
|> at ArgusUtil.c:1281
|> #2 0x0805be78 in ArgusOutputProcess (arg=0x9e1b2e0) at ArgusOutput.c:428
|> #3 0x0804e983 in ArgusProcessPacket (model=0x9e1a008, p=0x9e1d442 "",
|> length=1514, tvp=0xbfb8d768, type=-1) at ArgusModeler.c:1055
|> #4 0x0805545d in ArgusEtherPacket (user=0xb7e59008 "", h=0xbfb8d768,
|> p=0x9e1d442 "") at ArgusSource.c:608
|> #5 0x08063e18 in pcap_read_linux ()
|> #6 0x0805718c in ArgusGetPackets (src=0xb7e59008) at ArgusSource.c:1477
|> #7 0x0804b2eb in main (argc=1, argv=0xbfb8db34) at argus.c:460
|>
|>
|> (gdb) bt full
|> #0 0x08075df8 in ArgusFreeListRecord (buf=0xaa96df0) at argus_util.c:1362
|> mem = (struct ArgusMemoryHeader *) 0xaa96df0
|> rec = (struct ArgusRecordStruct *) 0xaa96df0
|> #1 0x0805a744 in ArgusWriteOutSocket (output=0x9e1b2e0, client=0x9e1b2f4)
|> at ArgusUtil.c:1281
|> asock = (struct ArgusSocketStruct *) 0xb4ffb50
|> list = (struct ArgusListStruct *) 0xa1e47d0
|> rec = (struct ArgusRecordStruct *) 0xaa96df0
|> retn = 276
|> count = 0
|> len = 276
|> ocnt = 11128989
|> statbuf = {st_dev = 836293388809535488, __pad1 = 39296, __st_ino =
|> 165781512, st_mode = 165796208, st_nlink = 3216561320, st_uid = 165781512,
|> st_gid = 0, st_rdev = 13815025949856902614, __pad2 = 36845, st_size =
|> 578914913796227081, st_blksize = 165781512, st_blocks = 1739248179131534,
|> st_atim = {tv_sec = 30, tv_nsec = 0}, st_mtim = {tv_sec = 1172616364,
|> tv_nsec = 165781512}, st_ctim = {
|> tv_sec = -1078405756, tv_nsec = -1078405928}, st_ino = 38789285994}
|> ptr = (unsigned char *) 0xb4ffb9c "\020 "
|> #2 0x0805be78 in ArgusOutputProcess (arg=0x9e1b2e0) at ArgusOutput.c:428
|> arguswriterecord = 1
|> done = 0
|> rec = (struct ArgusRecordStruct *) 0xaa97028
|> output = (struct ArgusOutputStruct *) 0x9e1b2e0
|> ArgusUpDate = {tv_sec = 0, tv_usec = 500000}
|> ArgusNextUpdate = {tv_sec = 0, tv_usec = 500000}
|> i = 0
|> val = 0
|> count = 0
|> retn = (void *) 0x0
|> #3 0x0804e983 in ArgusProcessPacket (model=0x9e1a008, p=0x9e1d442 "",
|> length=1514, tvp=0xbfb8d768, type=-1) at ArgusModeler.c:1055
|> retn = 0
|> tflow = (struct ArgusSystemFlow *) 0x9e1b290
|> flow = (struct ArgusFlowStruct *) 0x9e22b40
|> nflow = (struct ArgusFlowStruct *) 0xdaa8c08
|> ptr = 0x9e1d468 "\b\002"
|> value = 0
|> #4 0x0805545d in ArgusEtherPacket (user=0xb7e59008 "", h=0xbfb8d768,
|> p=0x9e1d442 "") at ArgusSource.c:608
|> ep = (struct ether_header *) 0x9e1d442
|> ind = 0
|> src = (struct ArgusSourceStruct *) 0xb7e59008
|> tvp = (struct timeval *) 0xbfb8d768
|> caplen = 160
|> length = 1514
|> statbuf = {st_dev = 0, __pad1 = 0, __st_ino = 0, st_mode = 0,
|> st_nlink = 10354372, st_uid = 3086764936, st_gid = 0, st_rdev =
|> 44261669504811007, __pad2 = 18120, st_size = -4631715752896591472,
|> st_blksize = 10255072, st_blocks = -5189186049726920576, st_atim = {
|> tv_sec = 1, tv_nsec = 1}, st_mtim = {tv_sec = 0, tv_nsec = 134516346},
|> st_ctim = {tv_sec = 0, tv_nsec = 134899988}, st_ino = 10354372}
|> #5 0x08063e18 in pcap_read_linux ()
|> No symbol table info available.
|> #6 0x0805718c in ArgusGetPackets (src=0xb7e59008) at ArgusSource.c:1477
|> ArgusReadMask = {__fds_bits = {128, 0 <repeats 31 times>}}
|> ArgusWriteMask = {__fds_bits = {0 <repeats 32 times>}}
|> ArgusExceptMask = {__fds_bits = {0 <repeats 32 times>}}
|> tmp = 1
|> i = 0
|> width = 7
|> noerror = 1
|> fd = 7
|> found = 1
|> up = 1
|> wait = {tv_sec = 0, tv_usec = 20000}
|> #7 0x0804b2eb in main (argc=1, argv=0xbfb8db34) at argus.c:460
|> commandlinew = 0
|> doconf = 0
|> dodebug = 0
|> i = 1
|> pid = 0
|> tmparg = 0x8049f30 "[\201��005"
|> filter = 0x0
|> statbuf = {st_dev = 64768, __pad1 = 0, __st_ino = 2688737, st_mode =
|> 33133, st_nlink = 1, st_uid = 500, st_gid = 500, st_rdev = 0, __pad2 = 0,
|> st_size = 11071, st_blksize = 4096, st_blocks = 32, st_atim = {
|> tv_sec = 1172616251, tv_nsec = 0}, st_mtim = {tv_sec = 1172616251,
|> tv_nsec = 0}, st_ctim = {tv_sec = 1172616251, tv_nsec = 0}, st_ino =
|> 2688737}
|> host = (struct hostent *) 0x80a6720
|> commandlinei = 0
|> op = -1
|> path = "/etc/argus.conf\000argus", '\0' <repeats 8170 times>
|>
|>
|> _____________________________________________________
|> Michael Hornung Computing & Communications hornung at washington.edu
|> University of Washington
|>
|
|
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