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View Code? Open in Web Editor NEWAgamotto: Accelerating Kernel Driver Fuzzing with Lightweight Virtual Machine Checkpoints
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`arch/x86/entry/thunk_64.o: warning: objtool: missing symbol table` error while building linux kernel on Ubuntu 21.10
system info:
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 21.10
Release: 21.10
Codename: impish
$ uname -a
Linux b3ale-OMEN-by-HP-Laptop-16-b0xxx 5.13.0-23-generic #23-Ubuntu SMP Fri Nov 26 11:41:15 UTC 2021 x86_64 x86_64 x86_64 GNU/Linuxthe error appeared while building the linux kernel:
$ ./build-linux-guest.sh all ../guest/linux/kernel
~/agamotto/guest/linux/kernel ~/agamotto/scripts
+ for config in ${GUEST_CONFIGS[*]}
+ defconfig=agamotto_aqtion_defconfig
+ '[' -f arch/x86/configs/agamotto_aqtion_defconfig ']'
+ echo Compiling agamotto_aqtion_defconfig...
Compiling agamotto_aqtion_defconfig...
+ make agamotto_aqtion_defconfig O=/home/b3ale/agamotto/scripts/./../build/guest/linux/image/aqtion
make[1]: Entering directory '/home/b3ale/agamotto/build/guest/linux/image/aqtion'
GEN Makefile
#
# No change to .config
#
make[1]: Leaving directory '/home/b3ale/agamotto/build/guest/linux/image/aqtion'
+ make -j40 O=/home/b3ale/agamotto/scripts/./../build/guest/linux/image/aqtion
make[1]: Entering directory '/home/b3ale/agamotto/build/guest/linux/image/aqtion'
GEN Makefile
DESCEND objtool
CALL /home/b3ale/agamotto/guest/linux/kernel/scripts/atomic/check-atomics.sh
CALL /home/b3ale/agamotto/guest/linux/kernel/scripts/checksyscalls.sh
CHK include/generated/compile.h
AS arch/x86/entry/thunk_64.o
arch/x86/entry/thunk_64.o: warning: objtool: missing symbol table
make[3]: *** [/home/b3ale/agamotto/guest/linux/kernel/scripts/Makefile.build:348: arch/x86/entry/thunk_64.o] Error 1
make[3]: *** Deleting file 'arch/x86/entry/thunk_64.o'
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [/home/b3ale/agamotto/guest/linux/kernel/scripts/Makefile.build:503: arch/x86/entry] Error 2
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/home/b3ale/agamotto/guest/linux/kernel/Makefile:1693: arch/x86] Error 2
make[1]: *** Waiting for unfinished jobs....
make[1]: Leaving directory '/home/b3ale/agamotto/build/guest/linux/image/aqtion'
make: *** [Makefile:179: sub-make] Error 2is this agamotto's error? or something wrong with my host machine?
agamotto login: panic: runtime error: invalid memory address or nil pointer dereference
Hi guys,
Trying to run agamotto on GCE instance.
Compiled and installed the host kernel (exactly the same one that you guys used), obviously with the patch and CONFIG_KVM_AGAMOTTO enabled.
Used the same guest kernel, QEMU and syzkaller, all of them patched just as in your installation tutorial.
We face a repetetive error, that occurs with all of the syzkaller configs.
Ran
roi@agamotto1nested:/opt/gopath/src/github.com/google/syzkaller$ ./bin/syz-manager -config /home/roi/agamotto/configs/syzkaller/generated/snapshot-usb.go7007.cfg -debug -vv 999999 > debugged.txt
1176 2020/08/17 13:06:40 executor already running - using existing in/out/err pipes
1177 2020/08/17 13:06:40 makeCommandWithPipes bin:[/usr/bin/ssh -p 1569 -F /dev/null -o UserKnownHostsFile=/dev/null -o BatchMode=yes -o IdentitiesOnly=yes -o StrictHostKeyChecking=no -o ConnectTimeout=10 -i /home/roi/agamotto/scripts/stretch.id_rsa root@localhost /syz-executor.wrapper]
1178 2020/08/17 13:06:40 performing handshake with an already running executor...
1179 periscope: syz-fuzzer receive handshake (magic=0xbadc0ffeebadface)
1180 periscope: paddr=0x12ce5000 for vaddr=0x7f75f8955000 l=0x18
1181 periscope: syz-fuzzer receive handshake (size=24)
1182 periscope: guest agent did not request shutdown 0
1183 [^[[0;32m OK ^[[0m] Started /etc/rc.local Compatibility.^M
1184 [^[[0;32m OK ^[[0m] Started Serial Getty on ttyS0.^M
1185 [^[[0;32m OK ^[[0m] Started Getty on tty1.^M
1186 [^[[0;32m OK ^[[0m] Reached target Login Prompts.^M
1187 [^[[0;32m OK ^[[0m] Reached target Multi-User System.^M
1188 [^[[0;32m OK ^[[0m] Reached target Graphical Interface.^M
1189 Starting Update UTMP about System Runlevel Changes...^M
1190 [^[[0;32m OK ^[[0m] Started Update UTMP about System Runlevel Changes.^M
1191 ^M^M
1192 Debian GNU/Linux 9 agamotto ttyS0^M
1193 ^M
1194 agamotto login: panic: runtime error: invalid memory address or nil pointer dereference
1195 [signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x8276dd]
1196
1197 goroutine 57 [running]:
1198 main.(*Proc).executeRaw(0xc00018ff40, 0xc00039ded8, 0xc000036040, 0x0, 0x0)
1199 /opt/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:349 +0xdd
1200 main.(*Proc).execute(0xc00018ff40, 0xc00039ded8, 0xc000036040, 0x0, 0x0, 0x2)
1201 /opt/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:299 +0x6a
1202 main.(*Proc).loop(0xc00018ff40)
1203 /opt/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:113 +0x3b6
1204 created by main.main
1205 /opt/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:449 +0x166a
attaching debugged.txt
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