Kernel Segfault Error 15
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Segfault At 0 Ip Sp Error 4
helping each other. Join them; it only takes a minute: Sign up Interpreting segfault messages up vote 23 down vote favorite 18 What is the correct interpretation of the following segfault messages? segfault at 10 ip 00007f9bebcca90d segfault error codes sp 00007fffb62705f0 error 4 in libQtWebKit.so.4.5.2[7f9beb83a000+f6f000] segfault at 10 ip 00007fa44d78890d sp 00007fff43f6b720 error 4 in libQtWebKit.so.4.5.2[7fa44d2f8000+f6f000] segfault at 11 ip 00007f2b0022acee sp 00007fff368ea610 error 4 in libQtWebKit.so.4.5.2[7f2aff9f7000+f6f000] segfault at 11 ip 00007f24b21adcee sp 00007fff7379ded0 error 4 in libQtWebKit.so.4.5.2[7f24b197a000+f6f000] linux qt webkit kernel segmentation-fault share|improve this question asked Mar 30 '10 at 22:40 knorv 16.1k61172269 possible duplicate of stackoverflow.com/questions/2179403/… –Charles Duffy Mar 31 '10 at 0:21 add a comment| 3 Answers 3 active oldest segfault error 14 votes up vote 43 down vote accepted Hmm. 4 is EINTR (interrupted system call). It may be that libQtWebKit is habitually mishandling that error, or it may be that there's something else that's going on. If this were a program, not a shared library Run addr2line -e yourSegfaultingProgram 00007f9bebcca90d (and repeat for the other instruction pointer values given) to see where the error is happening. Better, get a debug-instrumented build, and reproduce the problem under a debugger such as gdb. Since it's a shared library You're hosed, unfortunately; it's not possible to know where the libraries were placed in memory by the dynamic linker after-the-fact. Reproduce the problem under gdb. What the error means Here's the breakdown of the fields: address (after the at) - the location in memory the code is trying to access (it's likely that 10 and 11 are offsets from a pointer we expect to be set to a valid value but which is instead pointing to 0) ip - instruction pointer, ie. where the code which is trying to do this lives sp - stack pointer error - An error code for page faults; see below for what this means on x86. /* * Page fault error code bits: * * bit 0 == 0: no page found 1: protection fault * bit 1 == 0: read access 1: write acces
Post #1 of 8 (4062 views) Permalink x86_64 segfault error
Kernel Segfault At Rip Rsp Error 4
codes For segfault error codes on x86_64, bits 0-3 dmesg segfault error 4 are documented in arch/x86_64/mm/fault.c. However, I am getting error 0x14 and 0x15 with this particular
Segfault At Rip Rsp Error 6
user app when it segfaults. Is bit 4 valid and what does that imply? xxx-001[2085]: segfault at 0000007f960ea86b rip 0000007f960ea86b rsp 0000007fbfffe968 error http://stackoverflow.com/questions/2549214/interpreting-segfault-messages 14 xxx-001[2091]: segfault at 0000007fbfffe670 rip 0000007fbfffe670 rsp 0000007fbfffe668 error 15 -- -= Dave =- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo [at] vger More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ ak at suse http://www.gossamer-threads.com/lists/linux/kernel/598127 Dec14,2005,10:31AM Post #2 of 8 (4029 views) Permalink Re: x86_64 segfault error codes [In reply to] Dave
you get. So you have a message like the following: segfault at bfea3fec ip 080ee07e sp https://rgeissert.blogspot.com/2013/07/explaining-segmentation-fault-errors.html bfea3fa0 error 6 You might already know that ip means instruction http://www.webhostingtalk.com/showthread.php?t=947496 pointer and sp means stack pointer and as such the addresses that follow them are the values in those registers. But what does the error number mean? The error number, or code, actually gives you a better explanation of what the cause of segfault error the segfault is. The number's bits are flags describing the error and are architecture-dependent. For x86/x86_64 I just wrote an online converter/decoder that you can use to explain the segfault error code. As an example, the above error code is explained as: The cause was a user-mode write resulting in no page being found. segfault error 4 And the common error 4: The cause was a user-mode read resulting in no page being found.(also known as a null pointer dereference). Enjoy. Posted by Raphael Geissert at 02:30 Email ThisBlogThis!Share to TwitterShare to FacebookShare to Pinterest Labels: error, segfault, tool 4 comments: Anonymous12 July 2013 at 15:14Awesome!ReplyDeleteNils14 February 2014 at 10:08Thanks Raphael, just what I needed. ReplyDeleteAnonymous14 July 2014 at 02:14Really nice....Thanks a lotReplyDeleteJwjenkins3614 October 2014 at 20:59thank you!ReplyDeleteAdd commentLoad more... Newer Post Older Post Home Subscribe to: Post Comments (Atom) Popular Posts Explaining segmentation fault errors Editing Debian online with sources.debian.net Debian squeeze LTS Edit Debian, with iceweasel Blog Archive ► 2015 (7) ► August (2) ► June (1) ► May (1) ► April (2) ► January (1) ► 2014 (3) ► December (1) ► April (1) ► March (1) ▼ 2013 (37) ► November (1) ► October (3) ► September (4) ► August (3) ▼ July (2) Ten years-old ebook reader Explaining segmentation fault errors
Forums Hosting Security and Technology How to properly troubleshoot and resolve segfaults?? If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. Results 1 to 6 of 6 Thread: How to properly troubleshoot and resolve segfaults?? Tweet Thread Tools Show Printable Version Subscribe to this Thread… Search Thread Advanced Search Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode 05-10-2010,02:13 PM #1 hostbox View Profile View Forum Posts View Forum Threads Visit Homepage Web Hosting Master Join Date May 2003 Posts 2,432 How to properly troubleshoot and resolve segfaults?? Hi guys, I am having segfaults on one of my servers and I need to research how to troubleshoot and solve them. Per /var/log/messages a segfault occurs the day before at 15:00 hours. The next day at 6:00 hours another segfault occurs and this time the CPU load (iowait) goes skyhigh 35+ - apache stops serving requests. May 9 15:44:15 server11 kernel: php[1288]: segfault at 000000001d6fe4a0 rip 000000001d6fe4a0 rsp 00007fff7b75ec68 error 15 May 10 07:07:09 server11 kernel: php[18602]: segfault at 00007fff54dde348 rip 00000000006ba565 rsp 00007fff54dde350 error 6 May 10 07:36:42 server11 syslogd 1.4.1: restart. May 10 07:36:42 server11 kernel: klogd 1.4.1, log source = /proc/kmsg started. What can I do to troubleshoot and find the root cause? Thanks. ^_^ Reply With Quote 0 05-10-2010,02:30 PM #2 hostechsupport View Profile View Forum Posts View Forum Threads Visit Homepage Disabled Join Date Jun 2005 Posts 587 You are getting segfault error probably due to lack of resources. Is it vps? If yes, can you please post output of following command.. cat /proc/user_beancounters Reply With Quote 0 05-10-2010,03:18 PM #3 hostbox View Profile View Forum Posts View Forum Threads Visi