panic: runtime error: invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation code=0x1 addr=0x28 pc=0xa00d4a] goroutine 1 [running]: main.diffProgInfo(0x0, 0x7faeb2512aa8?) /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:432 +0x2a main.(*FuzzerTool).diffMaxSignal(0xb303a0?, 0xc0001a6c01?) /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:442 +0x97 main.(*FuzzerTool).convertExecutionResult(0x4?, {{0x9436, {0xc000e54000, 0x11d52, 0x11d52}, 0x0, 0x0, 0x0, 0x1, 0x0}, ...}) /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:386 +0x46 main.(*FuzzerTool).exchangeDataCall(0xc00053a000, 0x1, {0xc0005efa70, 0x1, 0x1?}) /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:345 +0x325 main.(*FuzzerTool).exchangeDataWorker(0xc00053a000) /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:380 +0x79 main.main() /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:273 +0x1449 D0325 19:05:08.699993 160453 task_exit.go:204] [ 7: 1178] Transitioning from exit state TaskExitNone to TaskExitInitiated D0325 19:05:08.700055 160453 task_signals.go:204] [ 7: 15] Signal 9, PID: 7, TID: 15, fault addr: 0x0: terminating thread group D0325 19:05:08.700051 160453 task_signals.go:204] [ 7: 16] Signal 9, PID: 7, TID: 16, fault addr: 0x0: terminating thread group D0325 19:05:08.700051 160453 task_signals.go:204] [ 7: 17] Signal 9, PID: 7, TID: 17, fault addr: 0x0: terminating thread group D0325 19:05:08.700074 160453 task_signals.go:204] [ 7: 10] Signal 9, PID: 7, TID: 10, fault addr: 0x0: terminating thread group D0325 19:05:08.700072 160453 task_signals.go:204] [ 7: 11] Signal 9, PID: 7, TID: 11, fault addr: 0x0: terminating thread group D0325 19:05:08.700091 160453 task_signals.go:204] [ 7: 18] Signal 9, PID: 7, TID: 18, fault addr: 0x0: terminating thread group D0325 19:05:08.700089 160453 task_signals.go:204] [ 7: 19] Signal 9, PID: 7, TID: 19, fault addr: 0x0: terminating thread group D0325 19:05:08.700094 160453 task_signals.go:204] [ 7: 2627] Signal 9, PID: 7, TID: 2627, fault addr: 0x0: terminating thread group D0325 19:05:08.700101 160453 task_signals.go:204] [ 7: 4353] Signal 9, PID: 7, TID: 4353, fault addr: 0x0: terminating thread group D0325 19:05:08.700105 160453 task_signals.go:204] [ 7: 20] Signal 9, PID: 7, TID: 20, fault addr: 0x0: terminating thread group D0325 19:05:08.700104 160453 task_signals.go:204] [ 7: 8] Signal 9, PID: 7, TID: 8, fault addr: 0x0: terminating thread group D0325 19:05:08.700110 160453 task_signals.go:204] [ 7: 12] Signal 9, PID: 7, TID: 12, fault addr: 0x0: terminating thread group D0325 19:05:08.700118 160453 task_exit.go:204] [ 7: 2627] Transitioning from exit state TaskExitNone to TaskExitInitiated D0325 19:05:08.700128 160453 task_signals.go:204] [ 7: 7] Signal 9, PID: 7, TID: 7, fault addr: 0x0: terminating thread group D0325 19:05:08.700141 160453 task_signals.go:204] [ 7: 9] Signal 9, PID: 7, TID: 9, fault addr: 0x0: terminating thread group D0325 19:05:08.700151 160453 task_signals.go:204] [ 7: 5127] Signal 9, PID: 7, TID: 5127, fault addr: 0x0: terminating thread group D0325 19:05:08.700172 160453 task_signals.go:204] [ 7: 14] Signal 9, PID: 7, TID: 14, fault addr: 0x0: terminating thread group D0325 19:05:08.700203 160453 task_signals.go:204] [ 7: 13] Signal 9, PID: 7, TID: 13, fault addr: 0x0: terminating thread group D0325 19:05:08.700216 160453 task_exit.go:204] [ 7: 2627] Transitioning from exit state TaskExitInitiated to TaskExitZombie D0325 19:05:08.700246 160453 task_exit.go:204] [ 7: 2627] Transitioning from exit state TaskExitZombie to TaskExitDead D0325 19:05:08.700320 160453 task_signals.go:204] [ 7: 1482] Signal 9, PID: 7, TID: 1482, fault addr: 0x0: terminating thread group D0325 19:05:08.700342 160453 task_signals.go:204] [ 7: 9073] Signal 9, PID: 7, TID: 9073, fault addr: 0x0: terminating thread group D0325 19:05:08.700353 160453 task_exit.go:204] [ 7: 15] Transitioning from exit state TaskExitNone to TaskExitInitiated D0325 19:05:08.700364 160453 task_exit.go:204] [ 7: 9073] Transitioning from exit state TaskExitNone to TaskExitInitiated D0325 19:05:08.700373 160453 task_signals.go:204] [ 7: 941] Signal 9, PID: 7, TID: 941, fault addr: 0x0: terminating thread group D0325 19:05:08.700395 160453 task_signals.go:470] [ 16759: 16759] Notified of signal 9 D0325 19:05:08.700407 160453 task_exit.go:204] [ 7: 9073] Transitioning from exit state TaskExitInitiated to TaskExitZombie D0325 19:05:08.700412 160453 task_exit.go:204] [ 7: 9073] Transitioning from exit state TaskExitZombie to TaskExitDead D0325 19:05:08.700421 160453 task_exit.go:204] [ 7: 12] Transitioning from exit state TaskExitNone to TaskExitInitiated D0325 19:05:08.700431 160453 task_exit.go:204] [ 7: 12] Transitioning from exit state TaskExitInitiated to TaskExitZombie D0325 19:05:08.700434 160453 task_exit.go:204] [ 7: 12] Transitioning from exit state TaskExitZombie to TaskExitDead D0325 19:05:08.700446 160453 task_signals.go:204] [ 16759: 16759] Signal 9, PID: 16759, TID: 16759, fault addr: 0x0: terminating thread group D0325 19:05:08.700452 160453 task_exit.go:204] [ 16759: 16759] Transitioning from exit state TaskExitNone to TaskExitInitiated D0325 19:05:08.700532 160453 task_signals.go:470] [ 16760( 1): 16760( 1)] Notified of signal 9 D0325 19:05:08.700539 160453 task_exit.go:204] [ 16759: 16759] Transitioning from exit state TaskExitInitiated to TaskExitZombie D0325 19:05:08.700547 160453 task_signals.go:481] [ 7: 7] No task notified of signal 17 D0325 19:05:08.700553 160453 task_exit.go:204] [ 7: 1178] Transitioning from exit state TaskExitInitiated to TaskExitZombie D0325 19:05:08.700557 160453 task_exit.go:204] [ 7: 1178] Transitioning from exit state TaskExitZombie to TaskExitDead D0325 19:05:08.700830 160453 task_signals.go:204] [ 16760( 1): 16760( 1)] Signal 9, PID: 16760, TID: 16760, fault addr: 0x0: terminating thread group D0325 19:05:08.700852 160453 task_exit.go:204] [ 16760( 1): 16760( 1)] Transitioning from exit state TaskExitNone to TaskExitInitiated D0325 19:05:08.700862 160453 task_exit.go:204] [ 7: 16] Transitioning from exit state TaskExitNone to TaskExitInitiated D0325 19:05:08.700891 160453 task_exit.go:204] [ 7: 16] Transitioning from exit state TaskExitInitiated to TaskExitZombie D0325 19:05:08.700899 160453 task_exit.go:204] [ 7: 16] Transitioning from exit state TaskExitZombie to TaskExitDead D0325 19:05:08.700910 160453 task_exit.go:204] [ 7: 10] Transitioning from exit state TaskExitNone to TaskExitInitiated D0325 19:05:08.700920 160453 task_exit.go:204] [ 7: 10] Transitioning from exit state TaskExitInitiated to TaskExitZombie D0325 19:05:08.700925 160453 task_exit.go:204] [ 7: 10] Transitioning from exit state TaskExitZombie to TaskExitDead D0325 19:05:08.700933 160453 task_exit.go:204] [ 7: 17] Transitioning from exit state TaskExitNone to TaskExitInitiated D0325 19:05:08.700943 160453 task_exit.go:204] [ 7: 17] Transitioning from exit state TaskExitInitiated to TaskExitZombie D0325 19:05:08.700948 160453 task_exit.go:204] [ 7: 17] Transitioning from exit state TaskExitZombie to TaskExitDead D0325 19:05:08.700957 160453 task_exit.go:204] [ 7: 11] Transitioning from exit state TaskExitNone to TaskExitInitiated D0325 19:05:08.700966 160453 task_exit.go:204] [ 7: 11] Transitioning from exit state TaskExitInitiated to TaskExitZombie D0325 19:05:08.700972 160453 task_exit.go:204] [ 7: 11] Transitioning from exit state TaskExitZombie to TaskExitDead D0325 19:05:08.700987 160453 task_exit.go:204] [ 7: 18] Transitioning from exit state TaskExitNone to TaskExitInitiated D0325 19:05:08.701047 160453 task_exit.go:204] [ 7: 18] Transitioning from exit state TaskExitInitiated to TaskExitZombie D0325 19:05:08.701055 160453 task_exit.go:204] [ 7: 18] Transitioning from exit state TaskExitZombie to TaskExitDead D0325 19:05:08.701068 160453 task_exit.go:204] [ 7: 19] Transitioning from exit state TaskExitNone to TaskExitInitiated D0325 19:05:08.701081 160453 task_exit.go:204] [ 7: 19] Transitioning from exit state TaskExitInitiated to TaskExitZombie D0325 19:05:08.701087 160453 task_exit.go:204] [ 7: 19] Transitioning from exit state TaskExitZombie to TaskExitDead D0325 19:05:08.701096 160453 task_exit.go:204] [ 7: 4353] Transitioning from exit state TaskExitNone to TaskExitInitiated D0325 19:05:08.701106 160453 task_exit.go:204] [ 7: 4353] Transitioning from exit state TaskExitInitiated to TaskExitZombie D0325 19:05:08.701111 160453 task_exit.go:204] [ 7: 4353] Transitioning from exit state TaskExitZombie to TaskExitDead D0325 19:05:08.701124 160453 task_exit.go:204] [ 7: 20] Transitioning from exit state TaskExitNone to TaskExitInitiated D0325 19:05:08.701135 160453 task_exit.go:204] [ 7: 20] Transitioning from exit state TaskExitInitiated to TaskExitZombie D0325 19:05:08.701140 160453 task_exit.go:204] [ 7: 20] Transitioning from exit state TaskExitZombie to TaskExitDead D0325 19:05:08.701148 160453 task_exit.go:204] [ 7: 8] Transitioning from exit state TaskExitNone to TaskExitInitiated D0325 19:05:08.701166 160453 task_exit.go:204] [ 7: 8] Transitioning from exit state TaskExitInitiated to TaskExitZombie D0325 19:05:08.701171 160453 task_exit.go:204] [ 7: 8] Transitioning from exit state TaskExitZombie to TaskExitDead D0325 19:05:08.701182 160453 task_exit.go:204] [ 7: 7] Transitioning from exit state TaskExitNone to TaskExitInitiated D0325 19:05:08.701207 160453 task_signals.go:458] [ 16759: 16759] Discarding duplicate signal 9 D0325 19:05:08.701217 160453 task_exit.go:204] [ 7: 7] Transitioning from exit state TaskExitInitiated to TaskExitZombie D0325 19:05:08.701225 160453 task_exit.go:204] [ 7: 9] Transitioning from exit state TaskExitNone to TaskExitInitiated D0325 19:05:08.701251 160453 task_signals.go:458] [ 16759: 16759] Discarding duplicate signal 9 D0325 19:05:08.701260 160453 task_exit.go:204] [ 7: 9] Transitioning from exit state TaskExitInitiated to TaskExitZombie D0325 19:05:08.701265 160453 task_exit.go:204] [ 7: 9] Transitioning from exit state TaskExitZombie to TaskExitDead D0325 19:05:08.701285 160453 task_exit.go:204] [ 7: 5127] Transitioning from exit state TaskExitNone to TaskExitInitiated D0325 19:05:08.701302 160453 task_exit.go:204] [ 7: 5127] Transitioning from exit state TaskExitInitiated to TaskExitZombie D0325 19:05:08.701307 160453 task_exit.go:204] [ 7: 5127] Transitioning from exit state TaskExitZombie to TaskExitDead D0325 19:05:08.701318 160453 task_exit.go:204] [ 7: 14] Transitioning from exit state TaskExitNone to TaskExitInitiated D0325 19:05:08.701327 160453 task_exit.go:204] [ 7: 14] Transitioning from exit state TaskExitInitiated to TaskExitZombie D0325 19:05:08.701331 160453 task_exit.go:204] [ 7: 14] Transitioning from exit state TaskExitZombie to TaskExitDead D0325 19:05:08.701340 160453 task_exit.go:204] [ 7: 13] Transitioning from exit state TaskExitNone to TaskExitInitiated D0325 19:05:08.701350 160453 task_signals.go:458] [ 16759: 16759] Discarding duplicate signal 9 D0325 19:05:08.701541 160453 task_exit.go:204] [ 7: 13] Transitioning from exit state TaskExitInitiated to TaskExitZombie D0325 19:05:08.701551 160453 task_exit.go:204] [ 7: 13] Transitioning from exit state TaskExitZombie to TaskExitDead D0325 19:05:08.701563 160453 task_exit.go:204] [ 7: 1482] Transitioning from exit state TaskExitNone to TaskExitInitiated D0325 19:05:08.701581 160453 task_exit.go:204] [ 7: 1482] Transitioning from exit state TaskExitInitiated to TaskExitZombie D0325 19:05:08.701589 160453 task_exit.go:204] [ 7: 1482] Transitioning from exit state TaskExitZombie to TaskExitDead D0325 19:05:08.701604 160453 task_exit.go:204] [ 7: 15] Transitioning from exit state TaskExitInitiated to TaskExitZombie D0325 19:05:08.701613 160453 task_exit.go:204] [ 7: 15] Transitioning from exit state TaskExitZombie to TaskExitDead D0325 19:05:08.701623 160453 task_exit.go:204] [ 7: 941] Transitioning from exit state TaskExitNone to TaskExitInitiated D0325 19:05:08.702886 160453 task_signals.go:458] [ 16759: 16759] Discarding duplicate signal 9 D0325 19:05:08.702918 160453 task_signals.go:470] [ 1: 1] Notified of signal 17 D0325 19:05:08.702928 160453 task_exit.go:204] [ 7: 941] Transitioning from exit state TaskExitInitiated to TaskExitZombie D0325 19:05:08.702942 160453 task_exit.go:204] [ 7: 941] Transitioning from exit state TaskExitZombie to TaskExitDead D0325 19:05:08.702948 160453 task_exit.go:204] [ 7: 7] Transitioning from exit state TaskExitZombie to TaskExitDead D0325 19:05:08.703221 160453 task_exit.go:361] [ 16760( 1): 16760( 1)] Init process terminating, killing namespace D0325 19:05:08.703248 160453 task_exit.go:204] [ 16760( 1): 16760( 1)] Transitioning from exit state TaskExitInitiated to TaskExitZombie D0325 19:05:08.703256 160453 task_signals.go:458] [ 1: 1] Discarding duplicate signal 17 D0325 19:05:08.703272 160453 task_signals.go:179] [ 1: 1] Restarting syscall 202: interrupted by signal 17 D0325 19:05:08.703280 160453 task_signals.go:220] [ 1: 1] Signal 17: delivering to handler D0325 19:05:08.704143 160453 loader.go:1259] updated processes (removal): map[{ci-gvisor-ptrace-2-cover-0 0}:0xc0003da840] D0325 19:05:08.704179 160453 controller.go:523] containerManager.Wait, cid: ci-gvisor-ptrace-2-cover-0, pid: 7, waitStatus: 0x200, err: D0325 19:05:08.704247 160453 urpc.go:568] urpc: successfully marshalled 38 bytes. D0325 19:05:08.704422 160536 urpc.go:611] urpc: unmarshal success. I0325 19:05:08.704522 160536 main.go:226] Exiting with status: 512 D0325 19:05:08.936826 160453 urpc.go:611] urpc: unmarshal success. D0325 19:05:08.954798 160453 urpc.go:568] urpc: successfully marshalled 373589 bytes. D0325 19:05:08.962514 160453 urpc.go:611] urpc: unmarshal success. D0325 19:05:08.962616 160453 controller.go:232] containerManager.Processes, cid: ci-gvisor-ptrace-2-cover-0 D0325 19:05:08.963285 160453 urpc.go:568] urpc: successfully marshalled 8409 bytes.