Hi folks,
i have a scenario where i need to wrap malloc and free calls and use dlsym
! now i want to use address sanitiser with but it fails with
ASAN:DEADLYSIGNAL
=================================================================
==4769==ERROR: AddressSanitizer: stack-overflow on address 0x7fffc9c3eff8
(pc 0x0000004008c4 bp 0x7fffc9c3f020 sp 0x7fffc9c3f000 T0)
A simple reproducible code is as follow
#include <stdio.h>
void* malloc(size_t sz)
{
void *(*libc_malloc)(size_t) = dlsym(RTLD_NEXT, "malloc");
return libc_malloc(sz);
}
void free(void *p)
{
void (*libc_free)(void*) = dlsym(RTLD_NEXT, "free");
libc_free(p);
}
int main()
{
malloc(10);
return 0;
}
This when compiled with asan flags fails with error
ASAN:DEADLYSIGNAL
=================================================================
==4769==ERROR: AddressSanitizer: stack-overflow on address 0x7fffc9c3eff8
(pc 0x0000004008c4 bp 0x7fffc9c3f020 sp 0x7fffc9c3f000 T0)
#0 0x4008c3 in free /scratch/example/asan/sample.c:14
#1 0x7f2b0cd275e4 in _dlerror_run (/lib64/libdl.so.2+0x15e4)
#2 0x7f2b0cd27127 in __dlsym (/lib64/libdl.so.2+0x1127)
#3 0x4008c8 in free /scratch/example/asan/sample.c:14
#4 0x7f2b0cd275e4 in _dlerror_run (/lib64/libdl.so.2+0x15e4)
#5 0x7f2b0cd27127 in __dlsym (/lib64/libdl.so.2+0x1127)
#6 0x4008c8 in free /scratch/example/asan/sample.c:14
#7 0x7f2b0cd275e4 in _dlerror_run (/lib64/libdl.so.2+0x15e4)
#8 0x7f2b0cd27127 in __dlsym (/lib64/libdl.so.2+0x1127)
#9 0x4008c8 in free /scratch/example/asan/sample.c:14
#10 0x7f2b0cd275e4 in _dlerror_run (/lib64/libdl.so.2+0x15e4)
--
You received this message because you are subscribed to the Google Groups
"address-sanitizer" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
For more options, visit https://groups.google.com/d/optout.
