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[Bug malloc/14593] New: mtrace gives incorrect caller address
- From: "jpdonnelly at eucalyptus dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: Tue, 18 Sep 2012 02:32:20 +0000
- Subject: [Bug malloc/14593] New: mtrace gives incorrect caller address
- Auto-submitted: auto-generated
http://sourceware.org/bugzilla/show_bug.cgi?id=14593
Bug #: 14593
Summary: mtrace gives incorrect caller address
Product: glibc
Version: 2.12
Status: NEW
Severity: normal
Priority: P2
Component: malloc
AssignedTo: unassigned@sourceware.org
ReportedBy: jpdonnelly@eucalyptus.com
Classification: Unclassified
It appears the mtrace reporting can give incorrect caller address
that is not in the text range or shared libraries:
1. This is just a sample of 250+ invalid caller address:
Memory not freed:
-----------------
Address Size Caller
0x00007fef72239010 0x64ed2d0 at 0x7fefb2d68210
0x0000000000007fef 0 at 0x7fefb2d522e4
0x00007fefa4024f80 0x38 at 0x7fefbc5e7dec
0x00007fefa4024fc0 0x20 at 0x7fefbc32f0a2
0x00007fefa4025040 0x36 at 0x7fefbb1c45f0
0x00007fefa4025050 0x35 at 0x7fefbb1c45f0
0x00007fefa4025080 0x10 at 0x7fefbb9a938e
0x00007fefa4025090 0x40 at 0x7fefbb9a81d6
0x00007fefa40250a0 0x80 at 0x7fefbb9ae687
0x00007fefa40250e0 0x36 at 0x7fefbb1c45f0
0x00007fefa4025120 0x10 at 0x7fefbb9a938e
0x00007fefa4025130 0x70 at 0x7fefbb98b4c4
0x00007fefa4025140 0x80 at 0x7fefbb9ae687
0x00007fefa40251b0 0x10 at 0x7fefbb1c5af5
0x00007fefa40251d0 0x10 at 0x7fefbb1c9f56
Note the caller address is: 0x7fefb2d522e4
Process map ( head only, 10 of 200 mmaps )
[root@eucahost-51-75 eucalyptus]# cat /proc/18300/maps | grep lib | cut -c1-140
| sort | egrep -i -v eucal | head
7f27d823b000-7f27d8251000 r-xp 00000000 08:01 232951
/lib64/libgcc_s-4.4.6-20110824.so.1
7f27d8251000-7f27d8450000 ---p 00016000 08:01 232951
/lib64/libgcc_s-4.4.6-20110824.so.1
7f27d8450000-7f27d8451000 rw-p 00015000 08:01 232951
/lib64/libgcc_s-4.4.6-20110824.so.1
7f27d981a000-7f27d982b000 r-xp 00000000 08:01 93826
/usr/lib64/libfa.so.1.3.4
7f27d982b000-7f27d9a2a000 ---p 00011000 08:01 93826
/usr/lib64/libfa.so.1.3.4
7f27d9a2a000-7f27d9a2b000 rw-p 00010000 08:01 93826
/usr/lib64/libfa.so.1.3.4
7f27d9a2b000-7f27d9a39000 r-xp 00000000 08:01 73738
/lib64/liblber-2.4.so.2.5.6
7f27d9a39000-7f27d9c38000 ---p 0000e000 08:01 73738
/lib64/liblber-2.4.so.2.5.6
7f27d9c38000-7f27d9c39000 r--p 0000d000 08:01 73738
/lib64/liblber-2.4.so.2.5.6
7f27d9c39000-7f27d9c3a000 rw-p 0000e000 08:01 73738
/lib64/liblber-2.4.so.2.5.6
Tail:
root@eucahost-51-75 eucalyptus]# cat /proc/18300/maps | grep lib | cut -c1-140
| sort | egrep -i -v eucal | tail
7f27e3da9000-7f27e3dd5000 r-xp 00000000 08:01 73562
/lib64/libpcre.so.0.0.1
7f27e3dd5000-7f27e3fd4000 ---p 0002c000 08:01 73562
/lib64/libpcre.so.0.0.1
7f27e3fd4000-7f27e3fd5000 rw-p 0002b000 08:01 73562
/lib64/libpcre.so.0.0.1
7f27e3fd5000-7f27e4058000 r-xp 00000000 08:01 73464
/lib64/libm-2.12.so
7f27e4058000-7f27e4257000 ---p 00083000 08:01 73464
/lib64/libm-2.12.so
7f27e4257000-7f27e4258000 r--p 00082000 08:01 73464
/lib64/libm-2.12.so
7f27e4258000-7f27e4259000 rw-p 00083000 08:01 73464
/lib64/libm-2.12.so
7f27e4259000-7f27e4279000 r-xp 00000000 08:01 232953
/lib64/ld-2.12.so
7f27e4478000-7f27e4479000 r--p 0001f000 08:01 232953
/lib64/ld-2.12.so
7f27e4479000-7f27e447a000 rw-p 00020000 08:01 232953
/lib64/ld-2.12.so
The program text ( main ) from gdb:
.
Dump of assembler code for function main:
0x00007f68e1d6f6e0 <+0>: push %r15
0x00007f68e1d6f6e2 <+2>: xor %edx,%edx
0x00007f68e1d6f6e4 <+4>: push %r14
0x00007f68e1d6f6e6 <+6>: push %r13
0x00007f68e1d6f6e8 <+8>: push %r12
0x00007f68e1d6f6ea <+10>: lea 0x2cafc(%rip),%r12
code text:0x7f68e1d6f6e0
The attached libraries are
from
(libpcre.so.0.0.1) 0x7f27d823b000
to
( ld-2.12.so) 0x7f27e447a000
The invalid caller address is 570GB above the end of code text:
0x7fefb2d522e4- main
0x7fefb2d522e4â0x7f68e1d6f6e0 = 0x86D0FE2C04
gdb does not recognize the caller address either.
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