Kmod_External DeadlySignal
3216alec opened this issue · comments
im trying to use your Kmod_example but everytime i try i get this
`sudo ./kmod_example
Using Mode: MODE_EXTERNAL
Mapping VM memory, this will take a second...
Mem: 7efb75200000 | Size: 6d6000000
AddressSanitizer:DEADLYSIGNAL
==7296==ERROR: AddressSanitizer: SEGV on unknown address 0x7efb75200000 (pc 0x7f3c1c5a76c4 bp 0x7fff9f6b3c90 sp 0x7fff9f6b3418 T0)
==7296==The signal is caused by a READ memory access.
#0 0x7f3c1c5a76c3 (/lib/x86_64-linux-gnu/libc.so.6+0xbb6c3)
#1 0x4dc41d (/home/alec/ree/vmread/build/kmod_example+0x4dc41d)
#2 0x52f5db (/home/alec/ree/vmread/build/kmod_example+0x52f5db)
#3 0x51db67 (/home/alec/ree/vmread/build/kmod_example+0x51db67)
#4 0x51cc2d (/home/alec/ree/vmread/build/kmod_example+0x51cc2d)
#5 0x52c7d9 (/home/alec/ree/vmread/build/kmod_example+0x52c7d9)
#6 0x52a0fc (/home/alec/ree/vmread/build/kmod_example+0x52a0fc)
#7 0x53531c (/home/alec/ree/vmread/build/kmod_example+0x53531c)
#8 0x7f3c1c50db27 (/lib/x86_64-linux-gnu/libc.so.6+0x21b27)
#9 0x41daf9 (/home/alec/ree/vmread/build/kmod_example+0x41daf9)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (/lib/x86_64-linux-gnu/libc.so.6+0xbb6c3)
==7296==ABORTING
`
i have tried changing the compiler to clang different versions of clang and different versions of gcc and g++ but to no avail. I know 2 other people who are having the same issue.
Seems like you have not loaded in the vmread kernel module. Be sure to check dmesg for this line:
vmread: initialized
When it is loaded in properly and the example code runs, you should see something like this in the dmesg output:
[ 2764.049071] vmread: checking 0x400000 pages
[ 2764.104599] vmread: got 0x400000 pages
[ 2764.563695] vmread: mapping successful!
If any of this fails, please post the errors and the stacktrace when built in debug mode (meson's --buildtype=debug option).
thanks i figured it out