X-Git-Url: http://git.ipfire.org/?a=blobdiff_plain;f=CWRU%2FOS-BUGS%2Fisc-posix-bug;fp=CWRU%2FOS-BUGS%2Fisc-posix-bug;h=0000000000000000000000000000000000000000;hb=8717718f9280034b2b3fc166074b821b53fa142c;hp=5acf4165baca744535702d17afa26109bc859e3e;hpb=d17f2cce8c2f57d6343f60601ce7f24f16438af8;p=thirdparty%2Fbash.git diff --git a/CWRU/OS-BUGS/isc-posix-bug b/CWRU/OS-BUGS/isc-posix-bug deleted file mode 100644 index 5acf4165b..000000000 --- a/CWRU/OS-BUGS/isc-posix-bug +++ /dev/null @@ -1,137 +0,0 @@ -Article 7946 of comp.unix.sysv386: -Newsgroups: comp.unix.sysv386 -Path: usenet.ins.cwru.edu!agate!stanford.edu!snorkelwacker.mit.edu!think.com!zaphod.mps.ohio-state.edu!rpi!batcomputer!cornell!rochester!lubkin -From: lubkin@cs.rochester.edu (Saul Lubkin) -Subject: Binary patch to os.o fixes POSIX panics using VP/ix with job controlled bash -Message-ID: <1991Apr30.034006.24056@cs.rochester.edu> -Organization: Computer Science Department University of Rochester -Date: Tue, 30 Apr 1991 03:40:06 GMT - - -Recently, Uwe Doering posted the following article: - - Article 6891 of comp.unix.sysv386: - Path: nancy!uunet!math.fu-berlin.de!fub!geminix.in-berlin.de!gemini - From: gemini@geminix.in-berlin.de (Uwe Doering) - Newsgroups: comp.unix.sysv386 - Subject: Re: NAMEI panic - trap "E", address and info follows (+ patch) - Message-ID: - Date: 13 Apr 91 00:55:41 GMT - References: <1991Apr10.040146.645@ddsw1.MCS.COM> - Organization: Private UNIX Site - Lines: 92 - - karl@ddsw1.MCS.COM (Karl Denninger) writes: - - >Is anyone else having problems with a "namei" panic in ISC 2.2 (with NFS, - >the NFS/lockd patches, and POSIX patches applied)? - > - >I have been getting these nearly daily. Trap type "E", address is d007962f. - >That's right near the end of "namei"; here's the relavent line from a "nm" - >on the kernel: - > - >namei |0xd007919c|extern| *struct( )|0x0608| |.text - > - >Needless to say, I am most displeased with the crashes! - > - >Near as I can determine, the hardware is fine. - > - >All pointers or ideas appreciated... - - I found this bug a few days ago and was about to send a bug report - to ISC. The problem is "simply" a NULL pointer reference in the - namei() function. The machine I found this on runs ISC 2.21 with - the security fix installed. I fixed this bug with a binary patch. It - is for the module /etc/conf/pack.d/kernel/os.o. I disassembled the - original and then the fixed version of os.o and ran a context diff - over the output. Depending on what version of the kernel config kit - you have the addresses might be off some bytes. You can apply this - patch with every binary file editor. - - *************** - *** 35349,35364 **** - [%al,%al] - cf71: 74 1e je 0x1e - [0xcf91] - ! cf73: 0f b7 07 movzwl (%edi),%eax - [%edi,%eax] - ! cf76: 3d 11 00 00 00 cmpl $0x11,%eax - [$0x11,%eax] - ! cf7b: 74 14 je 0x14 - [0xcf91] - ! cf7d: c7 45 e8 00 00 00 00 movl $0x0,0xe8(%ebp) - ! [$0x0,-24+%ebp] - ! cf84: eb 19 jmp 0x19 - ! [0xcf9f] - cf86: 90 nop - [] - cf87: 90 nop - --- 35349,35372 ---- - [%al,%al] - cf71: 74 1e je 0x1e - [0xcf91] - ! cf73: 85 ff testl %edi,%edi - ! [%edi,%edi] - ! cf75: 74 1a je 0x1a - ! [0xcf91] - ! cf77: 0f b7 07 movzwl (%edi),%eax - [%edi,%eax] - ! cf7a: 3d 11 00 00 00 cmpl $0x11,%eax - [$0x11,%eax] - ! cf7f: 74 10 je 0x10 - [0xcf91] - ! cf81: eb 15 jmp 0x15 - ! [0xcf98] - ! cf83: 90 nop - ! [] - ! cf84: 90 nop - ! [] - ! cf85: 90 nop - ! [] - cf86: 90 nop - [] - cf87: 90 nop - - I'm not absolutely sure whether the action that is now taken in case of - a NULL pointer is the right one, but I haven't noticed any problems, - and most important, there are no more kernel panics! At least not from - that spot. :-) The action that is taken if the pointer in _not_ NULL - hasn't changed (this is not very obvious from the patch, but look - in the disassembler listing of your own kernel for more details). - I use this modified kernel for over a week now and it works for - me. Of course, as always, I can't give you any guaranty that this - patch does something useful on your machine. :-) - - Hope this helps you. - - Uwe - - PS: ISC, if you see this posting, could you drop me a note on whether - you have put this on your to-do list? This would save me the time - needed to file an official bug report. - -- - Uwe Doering | INET : gemini@geminix.in-berlin.de - Berlin |---------------------------------------------------------------- - Germany | UUCP : ...!unido!fub!geminix.in-berlin.de!gemini - ======================================================================= - - -Here is a copy of my recent note to Uwe: - - - I've applied the binary patch that you recently poosted to comp.unix.sysv386 - for os.o. - - It works beautifully. Previously, I had compiled bash1.07CWRU, and it worked - well (using POSIX job control), job control and all -- but running VP/ix under - this bash caused a system panic. This evidently is the (now infamous) "POSIX - namei bug". After rebuilding the kernel with a patched os.o, the problem - simply disappeared. VP/ix, like everything else, now works fine under - bash1.07CWRU. - - - Yours sincerely, - - Saul Lubkin - -