https://bugs.kde.org/show_bug.cgi?id=453084
Bug ID: 453084
Summary: Misleading error with memmove: Source and destination
overlap in memcpy_chk
Product: valgrind
Version: 3.18.1
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: memcheck
Assignee: jsew...@acm.org
Reporter: mli...@suse.cz
Target Milestone: ---
Created attachment 148408
--> https://bugs.kde.org/attachment.cgi?id=148408&action=edit
Fedora dockerfile
The following fails for me, __memcpy_chk is used instead of __memmove_chk:
$ cat drpm.c
#define SIZE 32
int size = SIZE;
char data[SIZE];
int zero = 0;
int main() {
__builtin___memmove_chk(data + zero, data, size, size);
return 0;
}
$ gcc drpm.c -g -fuse-ld=gold -lrpm && valgrind ./a.out
...
==2468== Source and destination overlap in memcpy_chk(0x204060, 0x204060, 32)
==2468== at 0x4850ED2: __memcpy_chk (vg_replace_strmem.c:1617)
==2468== by 0x20117A: main (drpm.c:8)
Can be reproduce with Fedora dockerfile as well:
$ podman build -t test -f Dockerfile-fedora
STEP 1/4: FROM fedora:latest
STEP 2/4: RUN dnf --nogpgcheck -y install rpm-devel gcc wget valgrind
binutils-gold
--> Using cache
27002ecd458a78d4860b4b774a3474868fafd2f49f50822e28b94878792cc2aa
--> 27002ecd458
STEP 3/4: RUN wget
https://gist.github.com/marxin/b5041eb13da32cfd4b4b701a54e8c165/raw/1c993107b290fa4af9780953f394c3e5e5b8b656/drpm.c
--> Using cache
fdafad79d772f8e9c8f31f1037ef779505c8ce9d03a72f271d1f6b88ebe90f19
--> fdafad79d77
STEP 4/4: RUN gcc drpm.c -g -fuse-ld=gold -lrpm && valgrind
--error-exitcode=123 ./a.out
==1== Memcheck, a memory error detector
==1== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==1== Using Valgrind-3.18.1 and LibVEX; rerun with -h for copyright info
==1== Command: ./a.out
==1==
==1== Source and destination overlap in memcpy_chk(0x402040, 0x402040, 32)
==1== at 0x484F292: __memcpy_chk (vg_replace_strmem.c:1723)
==1== by 0x40062A: main (drpm.c:8)
==1==
==1==
==1== HEAP SUMMARY:
==1== in use at exit: 0 bytes in 0 blocks
==1== total heap usage: 0 allocs, 0 frees, 0 bytes allocated
==1==
==1== All heap blocks were freed -- no leaks are possible
==1==
==1== For lists of detected and suppressed errors, rerun with: -s
==1== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)
Error: error building at STEP "RUN gcc drpm.c -g -fuse-ld=gold -lrpm &&
valgrind --error-exitcode=123 ./a.out": error while running runtime: exit
status 123
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