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better map variability

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This commit is contained in:
vanhauser-thc
2021-03-17 13:16:02 +01:00
parent adeeed9e43
commit 94312796f9
2 changed files with 7 additions and 4 deletions
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1
docs/Changelog.md
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@ -12,6 +12,7 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
- afl-cc: - afl-cc:
- fix cmplog rtn (rare crash and not being able to gather ptr data) - fix cmplog rtn (rare crash and not being able to gather ptr data)
- link runtime not to shared libs - link runtime not to shared libs
- ensure shared libraries are properly built and instrumented
- qemu_mode (thanks @realmadsci): - qemu_mode (thanks @realmadsci):
- move AFL_PRELOAD and AFL_USE_QASAN logic inside afl-qemu-trace - move AFL_PRELOAD and AFL_USE_QASAN logic inside afl-qemu-trace
- add AFL_QEMU_CUSTOM_BIN - add AFL_QEMU_CUSTOM_BIN

10
src/afl-fuzz.c
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@ -1584,12 +1584,14 @@ int main(int argc, char **argv_orig, char **envp) {
afl->cmplog_fsrv.cmplog_binary = afl->cmplog_binary; afl->cmplog_fsrv.cmplog_binary = afl->cmplog_binary;
afl->cmplog_fsrv.init_child_func = cmplog_exec_child; afl->cmplog_fsrv.init_child_func = cmplog_exec_child;
if (map_size <= DEFAULT_SHMEM_SIZE && !afl->non_instrumented_mode && if ((map_size <= DEFAULT_SHMEM_SIZE ||
!afl->fsrv.qemu_mode && !afl->unicorn_mode) { afl->cmplog_fsrv.map_size < map_size) &&
!afl->non_instrumented_mode && !afl->fsrv.qemu_mode &&
!afl->unicorn_mode) {
afl->fsrv.map_size = DEFAULT_SHMEM_SIZE; // dummy temporary value afl->cmplog_fsrv.map_size = MAX(map_size, (u32)DEFAULT_SHMEM_SIZE);
char vbuf[16]; char vbuf[16];
snprintf(vbuf, sizeof(vbuf), "%u", DEFAULT_SHMEM_SIZE); snprintf(vbuf, sizeof(vbuf), "%u", afl->cmplog_fsrv.map_size);
setenv("AFL_MAP_SIZE", vbuf, 1); setenv("AFL_MAP_SIZE", vbuf, 1);
} }