Re: bin/59046: dhcpd issue

["Christos Zoulas via gnats" <gnats-admin%NetBSD.org@localhost>]

The following reply was made to PR bin/59046; it has been noted by GNATS.

From: Christos Zoulas <christos%zoulas.com@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: gnats-admin%netbsd.org@localhost,
 netbsd-bugs%netbsd.org@localhost,
 6bone%6bone.informatik.uni-leipzig.de@localhost
Subject: Re: bin/59046: dhcpd issue
Date: Mon, 10 Feb 2025 12:42:55 -0500

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 Can you print the message type in:
 
 static void
 build_dhcpv6_reply(struct data_string *reply, struct packet *packet) {
         memset(reply, 0, sizeof(*reply));
  =20
         /* I would like to classify the client once here, but
          * as I don't want to classify all of the incoming packets
          * I need to do it before handling specific types.
          * We don't need to classify if we are tossing the packet
          * or if it is a relay - the classification step will get
          * done when we process the inner client packet.
          */
 
         switch (packet->dhcpv6_msg_type) {
 
 ?
 
 Thanks
 
 christos
 
 > On Feb 10, 2025, at 3:00=E2=80=AFAM, =
 6bone%6bone.informatik.uni-leipzig.de@localhost via gnats <gnats-admin%netbsd.org@localhost> =
 wrote:
 >=20
 > The following reply was made to PR bin/59046; it has been noted by =
 GNATS.
 >=20
 > From: 6bone%6bone.informatik.uni-leipzig.de@localhost
 > To: Christos Zoulas <christos%zoulas.com@localhost>
 > Cc: gnats-bugs%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, =
 netbsd-bugs%netbsd.org@localhost
 > Subject: Re: Re: bin/59046: dhcpd issue
 > Date: Mon, 10 Feb 2025 08:56:37 +0100 (CET)
 >=20
 > This GDB was configured as "x86_64--netbsd".
 > Type "show configuration" for configuration details.
 > For bug reporting instructions, please see:
 > <https://www.gnu.org/software/gdb/bugs/>.
 > Find the GDB manual and other documentation resources online at:
 >      <http://www.gnu.org/software/gdb/documentation/>.
 >=20
 > For help, type "help".
 > Type "apropos word" to search for commands related to "word"...
 > Reading symbols from /usr/obj/external/mpl/dhcp/bin/server/dhcpd...
 > [New process 25706]
 > [New process 487]
 > [New process 13393]
 > [New process 27458]
 > [New process 4164]
 > [New process 6709]
 > [New process 10550]
 > [New process 11044]
 > [New process 13596]
 > [New process 597]
 > [New process 153]
 > [New process 15800]
 > [New process 21849]
 > Core was generated by `dhcpd'.
 > Program terminated with signal SIGSEGV, Segmentation fault.
 > [Current thread is 1 (process 25706)]
 > #0  0x00007bbf3510f8e8 in free () from /usr/lib/libc.so.12
 > #1  0x00000001a9695d28 in dfree (ptr=3D<optimized out>, =
 file=3D<optimized out>,
 >      line=3D<optimized out>)
 >      at =
 /usr/src/external/mpl/dhcp/lib/omapip/../../dist/omapip/alloc.c:208
 > #2  0x00000001a9666998 in buffer_dereference =
 (ptr=3Dptr@entry=3D0x7bbf2dfefc80,
 >      file=3Dfile@entry=3D0x1a9852728 =
 "/usr/src/external/mpl/dhcp/bin/server/../../dist/server/dhcpv6.c", =
 line=3Dline@entry=3D7807)
 >      at =
 /usr/src/external/mpl/dhcp/lib/common/../../dist/common/alloc.c:757
 > #3  0x00000001a966754c in data_string_forget =
 (data=3Ddata@entry=3D0x7bbf2dfefc80,
 >      file=3Dfile@entry=3D0x1a9852728 =
 "/usr/src/external/mpl/dhcp/bin/server/../../dist/server/dhcpv6.c", =
 line=3Dline@entry=3D7807)
 >      at =
 /usr/src/external/mpl/dhcp/lib/common/../../dist/common/alloc.c:1350
 > #4  0x00000001a963105a in dhcpv6 (packet=3D0x7bbf3888f000)
 >      at =
 /usr/src/external/mpl/dhcp/bin/server/../../dist/server/dhcpv6.c:7807
 > #5  0x00000001a96744a4 in do_packet6 (interface=3D<optimized out>,
 >      packet=3D0x7bbf2dfefde0 "\f", len=3D164, from_port=3D8962, =
 from=3D<optimized out>,
 >      was_unicast=3D<optimized out>)
 >      at =
 /usr/src/external/mpl/dhcp/lib/common/../../dist/common/options.c:4236
 > #6  0x00000001a965e10f in got_one_v6 (h=3D<optimized out>)
 >      at =
 /usr/src/external/mpl/dhcp/lib/common/../../dist/common/discover.c:1219
 > #7  0x00000001a9691f2a in omapi_iscsock_cb (task=3D<optimized out>,
 >      socket=3D<optimized out>, cbarg=3D0x7bbf3a0fc180, flags=3D1)
 >      at =
 /usr/src/external/mpl/dhcp/lib/omapip/../../dist/omapip/dispatch.c:172
 > #8  0x00000001a980d834 in internal_fdwatch_read (sock=3D0x7bbf3a0bf700)
 >      at =
 /usr/src/external/mpl/dhcp/bind/lib/libisc/../../dist/lib/isc/unix/socket.=
 c:3208
 > #9  dispatch_recv (sock=3D0x7bbf3a0bf700)
 >      at =
 /usr/src/external/mpl/dhcp/bind/lib/libisc/../../dist/lib/isc/unix/socket.=
 c:2718
 > #10 process_fd (writeable=3D<optimized out>, readable=3D<optimized =
 out>,
 >      fd=3D<optimized out>, thread=3D0x7bbf3a148ca0)
 >      at =
 /usr/src/external/mpl/dhcp/bind/lib/libisc/../../dist/lib/isc/unix/socket.=
 c:3279
 > #11 process_fds (nevents=3D<optimized out>, events=3D<optimized out>,
 >      thread=3D0x7bbf3a148ca0)
 >      at =
 /usr/src/external/mpl/dhcp/bind/lib/libisc/../../dist/lib/isc/unix/socket.=
 c:3326
 > #12 netthread (uap=3D0x7bbf3a148ca0)
 >      at =
 /usr/src/external/mpl/dhcp/bind/lib/libisc/../../dist/lib/isc/unix/socket.=
 c:3613
 > #13 0x00000001a9837713 in isc__trampoline_run (arg=3D0x7bbf3a13aa30)
 >      at =
 /usr/src/external/mpl/dhcp/bind/lib/libisc/../../dist/lib/isc/trampoline.c=
 :215
 > #14 0x00007bbf3960c89f in ?? () from /usr/lib/libpthread.so.1
 > #15 0x00007bbf350930e0 in ?? () from /usr/lib/libc.so.12
 > #16 0x0000000000200000 in ?? ()
 > #17 0x0000000000000000 in ?? ()
 >=20
 > Last log entry before the crash was:
 > Client 00:01:00:01:27:3e:db:f2:b0:5c:da:40:02:08 releases address =
 2001:638:902:200c::1269
 > Sending Relay-reply to 2001:638:902:1::1 port 547
 >=20
 >=20
 > Regards
 > Uwe
 >=20
 >=20
 > On Sat, 8 Feb 2025, Christos Zoulas wrote:
 >=20
 >> Can you compile with -g (symbols)? I can't tell which call is that.
 >>=20
 >> Thanks,
 >>=20
 >> christos
 >>=20
 >>=20
 >>=20
 >=20
 
 
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