Шаги для воспроизведения: В первой консоли выполнить команду: # dhcpcd -N eth0 --nobackground sending signal USR1 to pid 6266 eth0: rebinding lease of 10.88.9.122 eth0: leased 10.88.9.122 for 24379 seconds eth0: changing route to 10.88.8.0/21 eth0: changing default route via 10.88.8.1 Затем, во второй консоли выполнить команду: # dhcpcd -N eth0 sending signal USR1 to pid 6291 Результат: Вывод в консоли, где запущена первая команда: received SIGUSR1, renewing Ошибка сегментирования Примечание: Воспроизводится в Р8 (dhcpcd-6.11.5.alt1). В Сизифе не воспроизводится (dhcpcd-7.2.1-alt1). Дополнительная информация. Отладка в GDB: [root@work-8-2-x86-64-default ~]# gdb dhcpcd GNU gdb (GDB) 7.9-alt3 (ALT Linux) Copyright (C) 2015 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-alt-linux". Type "show configuration" for configuration details. For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from dhcpcd...Reading symbols from /usr/lib/debug/sbin/dhcpcd.debug...done. done. (gdb) run -N eth0 --nobackground Starting program: /sbin/dhcpcd -N eth0 --nobackground sending signal USR1 to pid 2495 Detaching after fork from child process 2652. Detaching after fork from child process 2653. eth0: rebinding lease of 10.88.9.24 eth0: leased 10.88.9.24 for 24551 seconds eth0: changing route to 10.88.8.0/21 eth0: adding default route via 10.88.8.1 Detaching after fork from child process 2654. Program received signal SIGUSR1, User defined signal 1. 0x00007ffff7b1e550 in __GI_epoll_pwait (epfd=3, events=events@entry=0x7fffffffe0d0, maxevents=maxevents@entry=1, timeout=12274970, set=set@entry=0x7fffffffe230) at ../sysdeps/unix/sysv/linux/epoll_pwait.c:42 42 return SYSCALL_CANCEL (epoll_pwait, epfd, events, maxevents, (gdb) c Continuing. received SIGUSR1, renewing Program received signal SIGSEGV, Segmentation fault. 0x0000000000406177 in dhcpcd_ifrenew (ifp=0x659080) at dhcpcd.c:1187 1187 if (ifp->options->options & DHCPCD_LINK && (gdb) bt #0 0x0000000000406177 in dhcpcd_ifrenew (ifp=0x659080) at dhcpcd.c:1187 #1 dhcpcd_renew (ctx=<optimized out>) at dhcpcd.c:1203 #2 0x0000000000408e01 in eloop_start (eloop=0x658a90, signals=signals@entry=0x7fffffffe230) at eloop.c:866 #3 0x000000000040395e in main (argc=<optimized out>, argv=<optimized out>) at dhcpcd.c:1940 (gdb) l 1182 static void 1183 dhcpcd_ifrenew(struct interface *ifp) 1184 { 1185 1186 #define DHCPCD_RARENEW (DHCPCD_IPV6 | DHCPCD_IPV6RS) 1187 if (ifp->options->options & DHCPCD_LINK && 1188 ifp->carrier != LINK_DOWN) 1189 { 1190 dhcp_renew(ifp); 1191 if ((ifp->options->options & DHCPCD_RARENEW) == DHCPCD_RARENEW) (gdb) print ifp $1 = (struct interface *) 0x659080 (gdb) print ifp->options $2 = (struct if_options *) 0x0 (gdb) print *ifp $3 = {ctx = 0x7fffffffe150, next = {tqe_next = 0x0, tqe_prev = 0x658f68}, name = "lo", '\000' <repeats 13 times>, index = 1, active = 0, flags = 65609, family = 772, hwaddr = '\000' <repeats 19 times>, hwlen = 6 '\006', metric = 201, carrier = 0, wireless = 0, ssid = '\000' <repeats 32 times>, ssid_len = 0, profile = '\000' <repeats 63 times>, options = 0x0, if_data = {0x660e80, 0x0, 0x0, 0x0, 0x659290, 0x0, 0x0}} (gdb)
Bug fixed in #229367.
