crash

[christf]

on gluon I was able to see: [41544.407792] [41544.407792] do_page_fault(): sending SIGSEGV to ddhcpd for invalid write access to 00d5524c [41544.414761] epc = 77cdaf5c in libc.so[77cb2000+92000] [41544.419729] ra = 77cdaf34 in libc.so[77cb2000+92000] [41544.424756]

attached is the core file (rename from png)

unfortunately I cannot see much with gdb:

christof@build:/var/lib/jenkins/workspace/babel-dev/wspace/lede$ ./build_dir/toolchain-mips_24kc_gcc-5.4.0_musl-1.1.16/gdb-8.0.1/gdb/gdb ./staging_dir/target-mips_24kc_musl-1.1.16/root-ar71xx/usr/sbin/ddhcpd /tmp/ddhcpd.1529728411.3028.11.core.png
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Reading symbols from ./staging_dir/target-mips_24kc_musl-1.1.16/root-ar71xx/usr/sbin/ddhcpd...done.
[New LWP 3028]

warning: Can't read pathname for load map: Unbekannter Fehler -1.

warning: Could not load shared library symbols for 2 libraries, e.g. /lib/libgcc_s.so.1.
Use the "info sharedlibrary" command to see the complete listing.
Do you need "set solib-search-path" or "set sysroot"?
Core was generated by `/usr/sbin/ddhcpd -D -s 1 -b 2 -c local-node -i br-client -N 10.126.0.0 16 -H /e'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x77766f5c in ?? ()
(gdb) bt
#0  0x77766f5c in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb) info sharedlibrary
warning: Can't read pathname for load map: Unbekannter Fehler -1.
From        To          Syms Read   Shared Object Library
                        No          /lib/libgcc_s.so.1
                        No          /lib/ld-musl-mips-sf.so.1
(gdb) bt
#0  0x77766f5c in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

I can see that the command line is cut off. I am starting ddhcpd like this:

 4508 root      2204 S    /usr/sbin/ddhcpd -D -s 1 -b 2 -c local-node -i br-client -N 10.126.0.0 16 -H /etc/ddhcpd.hook -o 51 4 0 0 1 44 -o 3 4 10 126 0 1 -o 6 4 10 126 0 1 -o 54 4 10 126 0 1 -o 1 4 255 255 0 0 -i mmfd0

this is the log up to the crash.

Sat Jun 23 16:21:48 2018 daemon.err ddhcpd[30989]: INFO: CONFIG: network=10.126.0.0/16
Sat Jun 23 16:21:48 2018 daemon.err ddhcpd[30989]: INFO: CONFIG: block_size=4
Sat Jun 23 16:21:48 2018 daemon.err ddhcpd[30989]: INFO: CONFIG: #blocks=16384
Sat Jun 23 16:21:48 2018 daemon.err ddhcpd[30989]: INFO: CONFIG: #spare_blocks=1
Sat Jun 23 16:21:48 2018 daemon.err ddhcpd[30989]: INFO: CONFIG: timeout=60
Sat Jun 23 16:21:48 2018 daemon.err ddhcpd[30989]: INFO: CONFIG: refresh_factor=4
Sat Jun 23 16:21:48 2018 daemon.err ddhcpd[30989]: INFO: CONFIG: tentative_timeout=15
Sat Jun 23 16:21:48 2018 daemon.err ddhcpd[30989]: INFO: CONFIG: client_interface=local-node
Sat Jun 23 16:21:48 2018 daemon.err ddhcpd[30989]: INFO: CONFIG: group_interface=mmfd0
Sat Jun 23 16:21:48 2018 daemon.err ddhcpd[30989]: DEBUG: ddhcp_block_init(config)
Sat Jun 23 16:21:48 2018 daemon.err ddhcpd[30989]: DEBUG: find_in_option_store( store, code: 1)
Sat Jun 23 16:21:48 2018 daemon.err ddhcpd[30989]: DEBUG: find_in_option_store(...) -> 1
Sat Jun 23 16:21:48 2018 daemon.err ddhcpd[30989]: DEBUG: find_in_option_store( store, code: 2)
Sat Jun 23 16:21:48 2018 daemon.err ddhcpd[30989]: DEBUG: set_in_option_store( store, code/len: 2/4)
Sat Jun 23 16:21:48 2018 daemon.err ddhcpd[30989]: DEBUG: find_in_option_store( store, code: 2)
Sat Jun 23 16:21:48 2018 daemon.err ddhcpd[30989]: DEBUG: set_in_option_store(...) -> append option
Sat Jun 23 16:21:48 2018 daemon.err ddhcpd[30989]: DEBUG: find_in_option_store( store, code: 28)
Sat Jun 23 16:21:48 2018 daemon.err ddhcpd[30989]: DEBUG: find_in_option_store(...) -> 28
Sat Jun 23 16:21:48 2018 daemon.err ddhcpd[30989]: DEBUG: find_in_option_store( store, code: 51)
Sat Jun 23 16:21:48 2018 daemon.err ddhcpd[30989]: DEBUG: find_in_option_store(...) -> 51
Sat Jun 23 16:21:48 2018 daemon.err ddhcpd[30989]: DEBUG: find_in_option_store( store, code: 54)
Sat Jun 23 16:21:48 2018 daemon.err ddhcpd[30989]: DEBUG: find_in_option_store(...) -> 54
Sat Jun 23 16:21:48 2018 daemon.err ddhcpd[30989]: INFO: loop timeout: 7500 msecs

[christf]

I cannot be certain however this might be due to the issue fixed with 9d117d5142db4a1a01289e5c968e973bb8ddcd6f

[christf]

this is fixed by #9

[sargon]

Merged.