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[Bug kprobes/4531] New: systemtap tests fail produce kernel oops on some configs of 2.6.22-rc2 kernel
- From: "wcohen at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: 22 May 2007 15:21:40 -0000
- Subject: [Bug kprobes/4531] New: systemtap tests fail produce kernel oops on some configs of 2.6.22-rc2 kernel
- Reply-to: sourceware-bugzilla at sourceware dot org
I was testing systemtap snapshot on x86_64 with the 2.6.22 kernel. I usually
start with the existing config file for the distro's kernel config on the
machine, e.g. /boot/config-2.6.9-55.EL for RHEL4 machine. The 2.6.22-rc2 kernel
on x86_64 machine that was built starting with rhel4 config file work. The
2.6.22-rc2 kernel on x86_64 machine starting with the fc7 config oopsed. The
oops showed it dying in the kprobes arc_arm_kprobe, the instruction writing the
actual break point when attempting place a probe for the following test:
Running
/home/wcohen/stap_snap_200705221118/src/testsuite/systemtap.base/equal.exp ...
The point it is dying is arch_arm_kprobe+0x4/0x8 in the function below:
ffffffff804400cf <arch_arm_kprobe>:
ffffffff804400cf: 48 8b 47 30 mov 0x30(%rdi),%rax
ffffffff804400d3: c6 00 cc movb $0xcc,(%rax)
ffffffff804400d6: c3 retq
Unfortunately, this laptop machine does not have a serial port, so it isn't easy
to get complete back trace.
-Will
--
Summary: systemtap tests fail produce kernel oops on some configs
of 2.6.22-rc2 kernel
Product: systemtap
Version: unspecified
Status: NEW
Severity: critical
Priority: P2
Component: kprobes
AssignedTo: systemtap at sources dot redhat dot com
ReportedBy: wcohen at redhat dot com
GCC host triplet: x86_64
http://sourceware.org/bugzilla/show_bug.cgi?id=4531
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