upx packed elf execution fails - Syscall ERROR: ql_syscall_mmap

[idanr1986]

*Describe the bug
when executing a packed elf file using upx I get the following error
[+] mmap - mapping needed for 0x400000
[x] Syscall ERROR: ql_syscall_mmap DEBUG: Error: mapping needed but failed
this happens because the requested address is already mapped.

when inspecting the elf execution with strace we can see that this is a normal behavior that is handled by the os.
map(0x7f52b079d000, 147456, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f52b079d000
mmap(0x7f52b079d000, 13352, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f52b079d000

Sample Code
cp /bin/ls ./rootfs/x8664_linux/bin/
upx ./rootfs/x8664_linux/bin/ls

ql = Qiling(["./rootfs/x8664_linux/bin/ls"], "./rootfs/x8664_linux", QL_VERBOSE.DEBUG)
ql.run()

Expected behavior
the ability to execute upx packed binaries in qiling, which is very imported for malware analysis

[elicn]

Hi @idanr1986,
You can use dev branch with the changes introduced in the PR above.
That should solve the problem.

[idanr1986]

@elicn works great I was able to execute the upx packed binary and to extract the unpacked code from memory.
thank you for your help.