From: Jan Kasprzak <kas@informatics.muni.cz>
To: linux-kernel@vger.kernel.org
Subject: x86_64 bad frame in signal deliver
Date: Mon, 19 Apr 2004 16:15:36 +0200 [thread overview]
Message-ID: <20040419141536.GU23938@fi.muni.cz> (raw)
Hello, all!
I have got the following messages on my FTP server running x86_64:
proftpd[16913]: segfault at 0000007fbf7ff170 rip 000000000041ecaa rsp 0000007fbf7ff160 error 6
proftpd[16913] bad frame in signal deliver frame:0000007fbf7fef18 rip:41ecaa rsp:7fbf7ff160 orax:ffffffffffffffff
proftpd[17332]: segfault at 0000007fbf7ff170 rip 000000000041ecaa rsp 0000007fbf7ff160 error 6
proftpd[17332] bad frame in signal deliver frame:0000007fbf7fef18 rip:41ecaa rsp:7fbf7ff160 orax:ffffffffffffffff
proftpd[17803]: segfault at 0000007fbf7ff170 rip 000000000041ecaa rsp 0000007fbf7ff160 error 6
proftpd[17803] bad frame in signal deliver frame:0000007fbf7fef18 rip:41ecaa rsp:7fbf7ff160 orax:ffffffffffffffff
proftpd[18200]: segfault at 0000007fbf7ff170 rip 000000000041ecaa rsp 0000007fbf7ff160 error 6
proftpd[18200] bad frame in signal deliver frame:0000007fbf7fef18 rip:41ecaa rsp:7fbf7ff160 orax:ffffffffffffffff
Does that mean that proftpd segfaulted inside user space (and is thus
buggy or even insecure) - as address rip:41ecaa suggests, or is it some kind
of kernel bug?
The /proc/<pid of proftpd>/maps on my system suggests that
0x41ecaa is a valid code address:
/proc/9878/maps:00400000-00460000 r-xp 00000000 09:00 765659 /usr/sbin/proftpd
/proc/9878/maps:0055f000-00568000 rw-p 0005f000 09:00 765659 /usr/sbin/proftpd
/proc/9878/maps:00667000-00668000 rw-p 00067000 09:00 765659 /usr/sbin/proftpd
Kernel is 2.6.5 on Fedora Core 1/x86_64.
Thanks,
-Yenya
--
| Jan "Yenya" Kasprzak <kas at {fi.muni.cz - work | yenya.net - private}> |
| GPG: ID 1024/D3498839 Fingerprint 0D99A7FB206605D7 8B35FCDE05B18A5E |
| http://www.fi.muni.cz/~kas/ Czech Linux Homepage: http://www.linux.cz/ |
Any compiler or language that likes to hide things like memory allocations
behind your back just isn't a good choice for a kernel. --Linus Torvalds
next reply other threads:[~2004-04-19 14:18 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-19 14:15 Jan Kasprzak [this message]
[not found] <1MHWN-3ga-31@gated-at.bofh.it>
2004-04-19 15:36 ` Andi Kleen
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