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panic: invalid allocation length: 0x0 (3)

Status: fixed on 2020/01/31 18:49
Reported-by: syzbot+0e1ff0b95fb2859b4190@syzkaller.appspotmail.com
Fix commit: ede8dfab3760 Enforce splice offset limits
First crash: 1579d, last: 1572d
▶ ▼ Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
gvisor panic: invalid allocation length: 0x0 C 223 1990d 2157d 0/26 fixed on 2018/12/12 09:36
gvisor panic: invalid allocation length: 0x0 (4) C 4338 709d 712d 14/26 fixed on 2022/06/09 07:46
gvisor panic: invalid allocation length: 0x0 (2) C 4 1978d 1979d 0/26 fixed on 2018/12/19 10:45

Sample crash report:
panic: invalid allocation length: 0x0

goroutine 231 [running]:
DIAGNOSIS:
I0128 07:16:08.646042   32571 x:0] ***************************
I0128 07:16:08.646098   32571 x:0] Args: [/syzkaller/managers/ptrace-direct-overlay-host-race/current/image -root /syzkaller/managers/ptrace-direct-overlay-host-race/workdir/gvisor_root -watchdog-action=panic -network=none -debug -alsologtostderr -platform=ptrace -file-access=exclusive -overlay -network=host -TESTONLY-unsafe-nonroot debug -stacks --ps ci-gvisor-ptrace-direct-overlay-host-race-2]
I0128 07:16:08.646218   32571 x:0] Version release-20200115.0-104-g6b14be4246e8
I0128 07:16:08.646241   32571 x:0] PID: 32571
I0128 07:16:08.646274   32571 x:0] UID: 0, GID: 0
I0128 07:16:08.646304   32571 x:0] Configuration:
I0128 07:16:08.646327   32571 x:0] 		RootDir: /syzkaller/managers/ptrace-direct-overlay-host-race/workdir/gvisor_root
I0128 07:16:08.646357   32571 x:0] 		Platform: ptrace
I0128 07:16:08.646383   32571 x:0] 		FileAccess: exclusive, overlay: true
I0128 07:16:08.646420   32571 x:0] 		Network: host, logging: false
I0128 07:16:08.646460   32571 x:0] 		Strace: false, max size: 1024, syscalls: []
I0128 07:16:08.646506   32571 x:0] ***************************
W0128 07:16:08.646555   32571 x:0] Block the TERM signal. This is only safe in tests!
D0128 07:16:08.646694   32571 x:0] Load container "/syzkaller/managers/ptrace-direct-overlay-host-race/workdir/gvisor_root" "ci-gvisor-ptrace-direct-overlay-host-race-2"
D0128 07:16:08.652395   32571 x:0] Signal container "ci-gvisor-ptrace-direct-overlay-host-race-2": signal 0
D0128 07:16:08.652489   32571 x:0] Signal sandbox "ci-gvisor-ptrace-direct-overlay-host-race-2"
D0128 07:16:08.652547   32571 x:0] Connecting to sandbox "ci-gvisor-ptrace-direct-overlay-host-race-2"
D0128 07:16:08.652913   32571 x:0] urpc: successfully marshalled 123 bytes.
W0128 07:16:08.749780   32571 x:0] FATAL ERROR: container sandbox is not running
container sandbox is not running
W0128 07:16:08.750058   32571 x:0] Failure to execute command, err: 1

Crashes (12):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/01/28 07:17 https://gvisor.googlesource.com/gvisor master 6b14be4246e8 56cd6c9b .config console log report syz ci-gvisor-ptrace-direct-overlay-host-race
2020/01/28 07:16 https://gvisor.googlesource.com/gvisor master 6b14be4246e8 56cd6c9b .config console log report syz ci-gvisor-ptrace-direct-overlay-host
2020/01/28 07:15 https://gvisor.googlesource.com/gvisor master 6b14be4246e8 56cd6c9b .config console log report syz ci-gvisor-main
2020/01/28 06:54 https://gvisor.googlesource.com/gvisor master 6b14be4246e8 56cd6c9b .config console log report syz ci-gvisor-ptrace-proxy-sandbox-race
2020/01/21 06:33 https://gvisor.googlesource.com/gvisor master 10401599e104 8eda0b95 .config console log report syz ci-gvisor-ptrace-proxy-sandbox-race
2020/01/21 06:32 https://gvisor.googlesource.com/gvisor master 10401599e104 8eda0b95 .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2020/01/21 06:32 https://gvisor.googlesource.com/gvisor master 10401599e104 8eda0b95 .config console log report syz ci-gvisor-ptrace-direct-overlay-host
2020/01/21 06:32 https://gvisor.googlesource.com/gvisor master 10401599e104 8eda0b95 .config console log report syz ci-gvisor-kvm-direct-sandbox
2020/01/21 06:31 https://gvisor.googlesource.com/gvisor master 10401599e104 8eda0b95 .config console log report syz ci-gvisor-main
2020/01/21 06:18 https://gvisor.googlesource.com/gvisor master 10401599e104 8eda0b95 .config console log report syz ci-gvisor-ptrace-direct-overlay-host-race
2020/01/28 06:31 https://gvisor.googlesource.com/gvisor master 6b14be4246e8 56cd6c9b .config console log report ci-gvisor-ptrace-proxy-sandbox-race
2020/01/21 06:06 https://gvisor.googlesource.com/gvisor master 10401599e104 8eda0b95 .config console log report ci-gvisor-ptrace-direct-overlay-host-race
* Struck through repros no longer work on HEAD.