Bug 241408 - utrace breaks PTRACE_SYSEMU: orig_eax value not preserved
Summary: utrace breaks PTRACE_SYSEMU: orig_eax value not preserved
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: 6
Hardware: i386
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Roland McGrath
QA Contact: Brian Brock
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2007-05-25 20:18 UTC by Roland McGrath
Modified: 2007-11-30 22:12 UTC (History)
0 users

Fixed In Version: 2.6.21-1.2962.fc6
Clone Of:
Environment:
Last Closed: 2007-06-22 21:41:44 UTC
Type: ---
Embargoed:

Attachments (Terms of Use)
test case (1.55 KB, text/plain)
2007-05-25 20:18 UTC, Roland McGrath 		no flags Details
refined test case (1.63 KB, text/x-csrc)
2007-05-26 01:27 UTC, Roland McGrath 		no flags Details
Show Obsolete (1) View All

Description Roland McGrath 2007-05-25 20:18:06 UTC 
PTRACE_SYSEMU behavior changed, regression affects UML.

Correct output:

-bash-3.1$ ./ptrace-sysemu 
Status 0x857f eip 8048518 eax -38 orig_eax 20
Status 0xb7f eip 8048518 eax -38 orig_eax -1
PTRACE_GETREGS: No such process
-bash-3.1$ 

Wrong output:

-bash-3.1$ ./ptrace-sysemu 
Status 0x857f eip 8048518 eax -38 orig_eax -1
Status 0xb7f eip 8048518 eax -38 orig_eax -1
PTRACE_GETREGS: No such process
-bash-3.1$
Comment 1 Roland McGrath 2007-05-25 20:18:07 UTC 
Created attachment 155480 [details]
test case
Comment 2 Roland McGrath 2007-05-25 22:28:47 UTC 
I have a fix in upstream utrace now.
Comment 3 Roland McGrath 2007-05-26 01:27:52 UTC 
Created attachment 155493 [details]
refined test case

Expected output now looks like this:

Status 0x857f eip 8048518 eax -38 orig_eax 20
Status 0xb7f eip 8048519 eax -38 orig_eax -1
PTRACE_GETREGS: No such process
Comment 4 Chuck Ebbert 2007-06-22 21:27:54 UTC 
Roland, can we close this? (the Jun 14th utrace went into FC6 kernel 2962)
Comment 5 Roland McGrath 2007-06-22 21:41:44 UTC 
Yup, it's all good now.  Please close with the right number in currentrelease if
it is pushed.
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