lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Mon, 20 Dec 2010 16:08:21 -0700 From: AJ ONeal <coolaj86@...il.com> To: linux-kernel@...r.kernel.org Subject: SIGBUS caused by mmap and memcpy that doesn't go away after application restart After posting to my local LUG I was told to ask about the possibility of a kernel bug here I have an application which runs for several hours in the same loop correctly, but eventually dies with SIGBUS. If I try to start the application again it immediately exits with SIGBUS and will not work until rebooted. gdb reports Program received signal SIGBUS, Bus error. 0x401bd354 in memcpy () from /lib/libc.so.6 (gdb) bt #0 0x401bd354 in memcpy () from /lib/libc.so.6 #1 0x0000929c in capture_file_write () #2 0x0fefeb0a in ?? () #3 0x0fefeb0a in ?? () Any ideas on what causes this error? How do I go about finding what #2 and #3 are? The system is a ARM OMAP3530 (Gumstix Overo). The kernel is 3.6.36. This is the application flow: count = 0 do outfile = /dev/shm/output.{#count}.dat data = read logged.dat for 512kb unlink outfile if exists truncate outfile to 512kb outfile_p = mmap outfile memcpy data outfile_p munmap count += 1 if count > MAX; count = 0 advance or rewind logged.dat loop I can post a link to a gist of the source upon request. AJ ONeal -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists