Package: aufs-tools Version: 1:3.2+20130722-1.1 Severity: normal --- Please enter the report below this line. ---
Using a standard Debian kernel I noticed these crashes in dmesg: [Mon Feb 9 18:27:58 2015] docker0: port 1(vethd6af4f5) entered forwarding state [Mon Feb 9 18:27:58 2015] docker0: port 1(vethd6af4f5) entered forwarding state [Mon Feb 9 18:28:13 2015] docker0: port 1(vethd6af4f5) entered forwarding state [Mon Feb 9 18:30:17 2015] auplink[26764]: segfault at 7fffd11217f8 ip 00000031eb6db479 sp 00007fffd1121800 error 6 in libc-2.19.so[31eb600000+19f000] [Mon Feb 9 18:30:17 2015] docker0: port 1(vethd6af4f5) entered disabled state [Mon Feb 9 18:30:17 2015] device vethd6af4f5 left promiscuous mode [Mon Feb 9 18:30:17 2015] docker0: port 1(vethd6af4f5) entered disabled state [Mon Feb 9 18:30:17 2015] aufs au_plink_put:454:docker[9960]: pseudo-link is not flushed [Mon Feb 9 18:30:32 2015] device vethb483b2f entered promiscuous mode [Mon Feb 9 18:30:32 2015] IPv6: ADDRCONF(NETDEV_UP): vethb483b2f: link is not ready [Mon Feb 9 18:30:32 2015] IPv6: ADDRCONF(NETDEV_CHANGE): vethb483b2f: link becomes ready [Mon Feb 9 18:30:32 2015] docker0: port 1(vethb483b2f) entered forwarding state [Mon Feb 9 18:30:32 2015] docker0: port 1(vethb483b2f) entered forwarding state [Mon Feb 9 18:30:48 2015] docker0: port 1(vethb483b2f) entered forwarding state [Mon Feb 9 18:42:32 2015] auplink[28259]: segfault at 7fff86fb8078 ip 00000031eb6db479 sp 00007fff86fb8080 error 6 in libc-2.19.so[31eb600000+19f000] [Mon Feb 9 18:42:32 2015] aufs au_plink_put:454:docker[2727]: pseudo-link is not flushed [Mon Feb 9 18:42:32 2015] docker0: port 1(vethb483b2f) entered disabled state [Mon Feb 9 18:42:32 2015] device vethb483b2f left promiscuous mode [Mon Feb 9 18:42:32 2015] docker0: port 1(vethb483b2f) entered disabled state [Mon Feb 9 19:12:38 2015] device vethe4f62d0 entered promiscuous mode $ uname -a Linux debian 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt2-1 (2014-12-08) x86_64 GNU/Linux Similar crashes reported here with some more info: https://github.com/docker/docker/issues/10595 The testcase from that report reproduces the issue for me: # auplink / flush auplink:plink.c:341: no aufs mount point Segmentation fault # gdb auplink (gdb) r / flush Starting program: /sbin/auplink / flush /sbin/auplink:plink.c:341: no aufs mount point Program received signal SIGSEGV, Segmentation fault. __strncpy_ssse3 () at ../sysdeps/x86_64/multiarch/strcpy-ssse3.S:43 43 ../sysdeps/x86_64/multiarch/strcpy-ssse3.S: No such file or directory. (gdb) bt #0 __strncpy_ssse3 () at ../sysdeps/x86_64/multiarch/strcpy-ssse3.S:43 #1 0x000000000040178c in strncpy (__len=20, __src=0x0, __dest=0x7fffffffe4f0 "") at /usr/include/x86_64-linux-gnu/bits/string3.h:120 #2 au_plink (cwd=cwd@entry=0x604010 "/", cmd=cmd@entry=0, flags=flags@entry=1, fd=fd@entry=0x0) at plink.c:342 #3 0x00000000004013ae in main (argc=<optimized out>, argv=<optimized out>) at auplink.c:64 I don't know why docker would call auplink on something that is not an aufs mountpoint (race condition?), but the crash when called on / reproduces everytime. --- System information. --- Architecture: amd64 Kernel: Linux 3.16.0-4-amd64 Debian Release: 8.0 500 testing-updates ftp.ro.debian.org 500 testing security.debian.org 500 testing ftp.ro.debian.org 100 jessie-backports ftp.ro.debian.org 1 experimental ftp.ro.debian.org --- Package information. --- Package's Depends field is empty. Package's Recommends field is empty. Package's Suggests field is empty. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
