[pkg-gnupg-maint] Bug#841437: gnupg-agent: --supervised segfaults immediately

[Jindřich Makovička]

Package: gnupg-agent
Version: 2.1.15-4

Hi,

gnupg-agent --supervised in Debian Sid now crashes immediately on startup,
which makes it unusable with systemd.

Backtrace from the binary with debug symbols below:

$ gdb ./gpg-agent
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Reading symbols from ./gpg-agent...done.
(gdb) r --supervised
Starting program: /home2/henry/tmp/gpg2/gnupg2-2.1.15/build/agent/gpg-agent
--supervised
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
gpg-agent (GnuPG) 2.1.15 starting in supervised mode.
no LISTEN_PID environment variable found in --supervised mode (ignoring)
no LISTEN_FDS or LISTEN_FDNAMES environment variables found in --supervised
mode (assuming 1 active descriptor)
listening on: std=3 extra=-1 browser=-1 ssh=-1

Program received signal SIGSEGV, Segmentation fault.
strrchr () at ../sysdeps/x86_64/strrchr.S:32
32 ../sysdeps/x86_64/strrchr.S: No such file or directory.
(gdb) bt
#0  strrchr () at ../sysdeps/x86_64/strrchr.S:32
#1  0x00005555555615e7 in handle_connections (listen_fd=3,
listen_fd_extra=-1, listen_fd_browser=-1, listen_fd_ssh=-1) at
../../agent/gpg-agent.c:2825
#2  0x000055555555e3fe in main (argc=<optimized out>, argv=<optimized out>)
at ../../agent/gpg-agent.c:1504
(gdb) l
27 in ../sysdeps/x86_64/strrchr.S
(gdb) frame 1
#1  0x00005555555615e7 in handle_connections (listen_fd=3,
listen_fd_extra=-1, listen_fd_browser=-1, listen_fd_ssh=-1) at
../../agent/gpg-agent.c:2825
2825      char *slash = strrchr (socket_name, '/');
(gdb) l
2820              strerror (errno));
2821  else
2822    {
2823      /* We need to watch the directory for the file becuase there
2824       * won't be an IN_DELETE_SELF for a socket file.  */
2825      char *slash = strrchr (socket_name, '/');
2826      log_assert (slash && slash[1]);
2827      *slash = 0;
2828      if (inotify_add_watch (my_inotify_fd, socket_name, IN_DELETE) ==
-1)
2829        {
(gdb) print socket_name
$1 = 0x0

Regards, Jindrich
-- 
Jindřich Makovička
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