tag 728225 + moreinfo unreproducible
thanks
I have tried the trivial script and it runs consistently at 0.4% of memory.
On the other hand I tried building ksh with
export DEB_BUILD_MAINT_OPTIONS=sanitize=+all
The resulting package was unusable generating the following report.
However I don't know what to make of that.
$ ksh
=================================================================
==20384==ERROR: AddressSanitizer: global-buffer-overflow on address
0x000000851482 at pc 0x7f9cea02fac6 bp 0x7ffc3376dbd0 sp 0x7ffc3376d380
READ of size 8 at 0x000000851482 thread T0
#0 0x7f9cea02fac5 in memcmp
(/usr/lib/x86_64-linux-gnu/libasan.so.2+0x74ac5)
#1 0x4ae9a7 (/bin/ksh93+0x4ae9a7)
#2 0x61e5a2 (/bin/ksh93+0x61e5a2)
#3 0x61ed20 (/bin/ksh93+0x61ed20)
#4 0x558bbb (/bin/ksh93+0x558bbb)
#5 0x40f43f (/bin/ksh93+0x40f43f)
#6 0x7f9ce881cb44 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x21b44)
#7 0x40f093 (/bin/ksh93+0x40f093)
0x000000851482 is located 62 bytes to the left of global variable
'hist_fname' defined in
'/home/nicholas/src/ksh/src/cmd/ksh93/data/msg.c:210:12' (0x8514c0) of
size 13
'hist_fname' is ascii string '/.sh_history'
0x000000851482 is located 0 bytes to the right of global variable
'e_dot' defined in
'/home/nicholas/src/ksh/src/cmd/ksh93/data/msg.c:211:12' (0x851480) of
size 2
'e_dot' is ascii string '.'
SUMMARY: AddressSanitizer: global-buffer-overflow ??:0 memcmp
Shadow bytes around the buggy address:
0x000080102240: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000080102250: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000080102260: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000080102270: 00 00 00 05 f9 f9 f9 f9 00 01 f9 f9 f9 f9 f9 f9
0x000080102280: 00 00 00 06 f9 f9 f9 f9 05 f9 f9 f9 f9 f9 f9 f9
=>0x000080102290:[02]f9 f9 f9 f9 f9 f9 f9 00 05 f9 f9 f9 f9 f9 f9
0x0000801022a0: 00 07 f9 f9 f9 f9 f9 f9 00 00 00 00 06 f9 f9 f9
0x0000801022b0: f9 f9 f9 f9 00 00 07 f9 f9 f9 f9 f9 00 07 f9 f9
0x0000801022c0: f9 f9 f9 f9 00 00 02 f9 f9 f9 f9 f9 00 05 f9 f9
0x0000801022d0: f9 f9 f9 f9 00 07 f9 f9 f9 f9 f9 f9 03 f9 f9 f9
0x0000801022e0: f9 f9 f9 f9 03 f9 f9 f9 f9 f9 f9 f9 03 f9 f9 f9
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
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
==20384==ABORTING
