https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65479
Joakim Tjernlund <joakim.tjernlund at infinera dot com> changed:
What |Removed |Added
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CC| |joakim.tjernlund at infinera
dot c
| |om
--- Comment #13 from Joakim Tjernlund <joakim.tjernlund at infinera dot com> ---
with gcc 4.9.3 an powerpc32 I sometimes get backtraces like this:
=================================================================
==2899==ERROR: AddressSanitizer: heap-use-after-free on address 0xb400091c at
pc 0xb3800120 bp 0xbf86a270 sp 0xbf86a288
READ of size 4 at 0xb400091c thread T0
==2899==AddressSanitizer: while reporting a bug found another one.Ignoring.
#0 0xb380011c (+0x11c)
#1 0xfb2aa10 in __asan_report_error
(/usr/lib/gcc/powerpc-unknown-linux-gnu/4.9.3/libasan.so.1+0x65a10)
#2 0xfb2bac8 in __asan_report_load4
(/usr/lib/gcc/powerpc-unknown-linux-gnu/4.9.3/libasan.so.1+0x66ac8)
#3 0xf3c028c in Icn_unregisterIf
(/opt/appl/cuappl04a-r27a-160209jt2//lib/libiciif.so.1+0x4c28c)
0xb400091c is located 2204 bytes inside of 2208-byte region
[0xb4000080,0xb4000920)
freed by thread T0 here:
#0 0xf3b9ba0 in Icn_removeEntry
(/opt/appl/cuappl04a-r27a-160209jt2//lib/libiciif.so.1+0x45ba0)
previously allocated by thread T0 here:
#0 0xf3c0870 in Icn_registerIf
(/opt/appl/cuappl04a-r27a-160209jt2//lib/libiciif.so.1+0x4c870)
SUMMARY: AddressSanitizer: heap-use-after-free ??:0 ??
Shadow bytes around the buggy address:
0x368000d0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x368000e0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x368000f0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x36800100: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x36800110: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
=>0x36800120: fd fd fd[fd]fa fa fa fa fa fa fa fa fa fa fa fa
0x36800130: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36800140: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36800150: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x36800160: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x36800170: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Heap right redzone: fb
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack partial redzone: f4
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Contiguous container OOB:fc
ASan internal: fe
==2899==ABORTING
This backtrace is incomplete, could this bug be the cause?
