syzkaller - mmap failed

[thealberto]

Hi all,
I'm trying to use actor against one of the supported versions. I can do all the step except the final one. I got the following error:

[   24.565327] audit: type=1400 audit(1743195327.870:9): avc:  denied  { module_load } for  pid=249 comm="syz-fuzzer" path="/root/uio.ko" dev="sda" ino=15553 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:user_home_dir_t:s0 tclass=system permissive=1
[   24.572316] uio_ivshmem: loading out-of-tree module taints kernel.
[   24.573978] no MSI (-22). Back to INTx.
[   24.574222] regular IRQs
[   24.575706] x86/PAT: syz-fuzzer:253 map pfn expected mapping type uncached-minus for [mem 0x380000000000-0x38001fffffff], got write-back
invalid argument
panic: mmap failed

goroutine 1 [running]:
main.main()
	.../actor/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:345 +0x1d7a

Do you think it is a bug related to syzkaller or to the wa I setup actor?

Thanks

[olmeke]

Hi, sorry for the late reply. This does seem like an issue with the shared memory between host and guest, so actor setup related. did you copy the ivshmem related drivers to the VM? You can also start the VM manually and load the modules ones to see if there are any errors when you load the module. From your log, it seems like the module load was denied. You may have to turn of selinux in the vm image.