monitor: Fix buffer overflow with unix socket If btmon uses a unix socket, which has a long pathname, then the buffer overflow occurs as below: *** strcpy_chk: buffer overflow detected ***: program terminated at 0x4C3085C: ??? (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) by 0x4C34E46: __strcpy_chk (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) by 0x4084FE: strcpy (string3.h:110) by 0x4084FE: control_server (control.c:1148) by 0x4029E9: main (main.c:144) This patch also gives an error and stops running when parsing command-line arguments if the unix socket pathname is too long. And this patch adds the redundant check in control_server() to prevent the regression when reusing in the future.

Diffstat

2 files changed, 14 insertions(+), 1 deletions(-)