Hello, no longer reproducible for me on any of my machines -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to nano in Ubuntu. https://bugs.launchpad.net/bugs/1539627
Title: Buffer underflow in nano 2.4.2-1ubuntu0.1 causes SIGSEGV Status in nano package in Ubuntu: Incomplete Bug description: nusch@XPS13:~$ touch .the_test.swp nusch@XPS13:~$ nano the_test core dumped LANG env is ="pl_PL.UTF" without it it doen't Segfault so error is connected with unicode handling. Compiling nano from source(apt-get source - so the same version) doesn't geneate nano binary which beheaves same way. The difference is in libncurses>w< library: nusch@XPS13:~$ ldd /bin/nano linux-vdso.so.1 => (0x00007ffe5cb00000) libncursesw.so.5 => /lib/x86_64-linux-gnu/libncursesw.so.5 (0x00007fdec11c5000) << with w libtinfo.so.5 => /lib/x86_64-linux-gnu/libtinfo.so.5 (0x00007fdec0f9c000) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fdec0bd1000) libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fdec09cd000) /lib64/ld-linux-x86-64.so.2 (0x000055cc1e5d6000) nusch@XPS13:~$ ldd /bin/nano_from_src linux-vdso.so.1 => (0x00007ffd22d48000) libncurses.so.5 => /lib/x86_64-linux-gnu/libncurses.so.5 (0x00007f75dc891000) << without w libtinfo.so.5 => /lib/x86_64-linux-gnu/libtinfo.so.5 (0x00007f75dc668000) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f75dc29d000) libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f75dc099000) /lib64/ld-linux-x86-64.so.2 (0x000055f9b15ce000) Backtrace of segfault: Program received signal SIGSEGV, Segmentation fault. 0x0000000000404047 in ?? () (gdb) bt #0 0x0000000000404047 in ?? () #1 0x00007ffff75d1a40 in __libc_start_main (main=0x403770, argc=2, argv=0x7fffffffe2a8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffe298) at libc-start.c:289 #2 0x0000000000404329 in ?? () Disassembly of that part of code: 40401d: 0f 84 3c 01 00 00 je 40415f <__sprintf_chk@plt+0x9ff> 404023: 83 7c 24 10 00 cmp DWORD PTR [rsp+0x10],0x0 404028: 75 0a jne 404034 <__sprintf_chk@plt+0x8d4> 40402a: 81 25 1c e8 22 00 ff and DWORD PTR [rip+0x22e81c],0xffffbfff # 632850 <stderr+0x1f0> 404031: bf ff ff 404034: 48 8b 05 dd e7 22 00 mov rax,QWORD PTR [rip+0x22e7dd] # 632818 <stderr+0x1b8> 40403b: 48 8b 80 90 00 00 00 mov rax,QWORD PTR [rax+0x90] 404042: 48 85 c0 test rax,rax 404045: 74 0b je 404052 <__sprintf_chk@plt+0x8f2> 404047: 83 78 38 00 cmp DWORD PTR [rax+0x38],0x0 40404b: 7e 05 jle 404052 <__sprintf_chk@plt+0x8f2> 40404d: e8 3e fc 00 00 call 413c90 <__sprintf_chk@plt+0x10530> 404052: 48 8b 7c 24 20 mov rdi,QWORD PTR [rsp+0x20] 404057: 48 85 ff test rdi,rdi 40405a: 0f 8e b5 00 00 00 jle 404115 <__sprintf_chk@plt+0x9b5> 404060: 48 8b 74 24 28 mov rsi,QWORD PTR [rsp+0x28] ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: nano 2.4.2-1ubuntu0.1 ProcVersionSignature: Ubuntu 4.2.0-25.30-generic 4.2.6 Uname: Linux 4.2.0-25-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.19.1-0ubuntu5 Architecture: amd64 CurrentDesktop: Unity Date: Fri Jan 29 15:13:25 2016 InstallationDate: Installed on 2015-05-08 (266 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) SourcePackage: nano UpgradeStatus: Upgraded to wily on 2015-11-15 (74 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nano/+bug/1539627/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp