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SIGSEGV: segmentation violation

Status: moderation: reported C repro on 2019/03/16 00:00
Reported-by: syzbot+71f57c1b49ac1f520766@syzkaller.appspotmail.com
First crash: 2348d, last: 1537d

Sample crash report:
SIGSEGV: segmentation violation
PC=0x9ade60 m=11 sigcode=128

DIAGNOSIS:


Error collecting stacks: failed to run ["/syzkaller/managers/kvm-direct-sandbox/current/image" "-root" "/syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root" "-watchdog-action=panic" "-network=none" "-debug" "-platform=kvm" "-file-access=exclusive" "-network=sandbox" "debug" "-stacks" "ci-gvisor-kvm-direct-sandbox-0"]: exit status 128
I0221 15:28:56.873465   45362 x:0] ***************************
I0221 15:28:56.873560   45362 x:0] Args: [/syzkaller/managers/kvm-direct-sandbox/current/image -root /syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root -watchdog-action=panic -network=none -debug -platform=kvm -file-access=exclusive -network=sandbox debug -stacks ci-gvisor-kvm-direct-sandbox-0]
I0221 15:28:56.873608   45362 x:0] Git Revision: b2a5ad047a26dbe06c16dfa5a4e150836b79fd7c
I0221 15:28:56.873614   45362 x:0] PID: 45362
I0221 15:28:56.873621   45362 x:0] UID: 0, GID: 0
I0221 15:28:56.873624   45362 x:0] Configuration:
I0221 15:28:56.873627   45362 x:0] 		RootDir: /syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root
I0221 15:28:56.873631   45362 x:0] 		Platform: kvm
I0221 15:28:56.873641   45362 x:0] 		FileAccess: exclusive, overlay: false
I0221 15:28:56.873648   45362 x:0] 		Network: sandbox, logging: false
I0221 15:28:56.873659   45362 x:0] 		Strace: false, max size: 1024, syscalls: []
I0221 15:28:56.873669   45362 x:0] ***************************
D0221 15:28:56.873691   45362 x:0] Load container "/syzkaller/managers/kvm-direct-sandbox/workdir/gvisor_root" "ci-gvisor-kvm-direct-sandbox-0"
D0221 15:28:56.874462   45362 x:0] Signal container "ci-gvisor-kvm-direct-sandbox-0": signal 0
D0221 15:28:56.874487   45362 x:0] Signal sandbox "ci-gvisor-kvm-direct-sandbox-0"
D0221 15:28:56.874502   45362 x:0] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-0"
D0221 15:28:56.874676   45362 x:0] urpc: successfully marshalled 110 bytes.
I0221 15:28:57.014729   45362 x:0] Found sandbox "ci-gvisor-kvm-direct-sandbox-0", PID: 11963
I0221 15:28:57.014757   45362 x:0] Retrieving sandbox stacks
D0221 15:28:57.014763   45362 x:0] Stacks sandbox "ci-gvisor-kvm-direct-sandbox-0"
D0221 15:28:57.014769   45362 x:0] Connecting to sandbox "ci-gvisor-kvm-direct-sandbox-0"
D0221 15:28:57.014855   45362 x:0] urpc: successfully marshalled 36 bytes.
W0221 15:28:57.031697   45362 x:0] FATAL ERROR: retrieving stacks: getting sandbox "ci-gvisor-kvm-direct-sandbox-0" stacks: urpc method "debug.Stacks" failed: connection reset by peer
retrieving stacks: getting sandbox "ci-gvisor-kvm-direct-sandbox-0" stacks: urpc method "debug.Stacks" failed: connection reset by peer
goroutine 322 [syscall, locked to thread]:
gvisor.googlesource.com/gvisor/pkg/sentry/platform/kvm.(*vCPU).SwitchToUser(0xc000200000, 0xc000668000, 0xc000798c00, 0xc00043e360, 0x100060000, 0xc00085a2c8, 0x1, 0x1, 0x48a41d)
	pkg/sentry/platform/kvm/machine_amd64.go:235 +0xbe fp=0xc080cfbda8 sp=0xc080cfbd38 pc=0x9de14e
gvisor.googlesource.com/gvisor/pkg/sentry/platform/kvm.(*context).Switch(0xc00085a2c0, 0xd69120, 0xc0009c4900, 0xd77000, 0xc000668000, 0x7f5fffffffff, 0xc00085a2c8, 0x0, 0x0, 0x0)
	pkg/sentry/platform/kvm/context.go:71 +0x1fd fp=0xc080cfbe68 sp=0xc080cfbda8 pc=0x9d370d
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc000a74a80, 0xd5c7a0, 0x0)
	pkg/sentry/kernel/task_run.go:205 +0x348 fp=0xc080cfbf88 sp=0xc080cfbe68 pc=0x7847c8
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc000a74a80, 0x24)
	pkg/sentry/kernel/task_run.go:91 +0x149 fp=0xc080cfbfd0 sp=0xc080cfbf88 pc=0x784109
runtime.goexit()
	bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/linux_amd64_pure_stripped/stdlib%/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc080cfbfd8 sp=0xc080cfbfd0 pc=0x457fa1
created by gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:279 +0xfe

Crashes (1502):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/02/21 15:29 https://gvisor.googlesource.com/gvisor master b2a5ad047a26 3133098b .config console log report syz C ci-gvisor-kvm-direct-sandbox
2019/01/17 02:17 https://gvisor.googlesource.com/gvisor master e4d3ca726329 c2faf9b2 .config console log report syz C ci-gvisor-kvm-proxy-overlay-sandbox
2019/01/09 12:45 https://gvisor.googlesource.com/gvisor master dd761c170cc2 45c0c1b1 .config console log report syz C ci-gvisor-kvm-proxy-overlay-sandbox
2019/01/08 11:17 https://gvisor.googlesource.com/gvisor master dc4849e49c35 37dd2683 .config console log report syz C ci-gvisor-kvm-proxy-overlay-sandbox
2018/12/27 01:03 https://gvisor.googlesource.com/gvisor master bfa2f314ca05 e747ec98 .config console log report syz C ci-gvisor-kvm-proxy-overlay-sandbox
2018/06/26 16:03 https://gvisor.googlesource.com/gvisor master 9c0c4fd8d05c 089f1181 .config console log report syz C ci-gvisor-kvm-direct-sandbox
2020/07/06 10:28 gvisor 6a90c88b9748 695ef2dd .config console log report syz C ci-gvisor-kvm-proxy-overlay-sandbox
2020/06/12 14:19 gvisor 61d6c059ac34 819b58b0 .config console log report syz C ci-gvisor-kvm-direct-sandbox
2019/04/22 00:29 https://gvisor.googlesource.com/gvisor master 358eb52a76eb b0e8efcb .config console log report syz ci-gvisor-kvm-direct-sandbox
2019/04/22 00:16 https://gvisor.googlesource.com/gvisor master 358eb52a76eb b0e8efcb .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2019/03/21 19:57 https://gvisor.googlesource.com/gvisor master 6bece16b880e 2cc9698b .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2019/03/21 19:43 https://gvisor.googlesource.com/gvisor master 6bece16b880e 2cc9698b .config console log report syz ci-gvisor-kvm-direct-sandbox
2019/03/12 02:16 https://gvisor.googlesource.com/gvisor master fbacb3503916 12365b99 .config console log report syz ci-gvisor-kvm-direct-sandbox
2019/03/12 01:57 https://gvisor.googlesource.com/gvisor master 71d53382bfb3 12365b99 .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2019/03/11 08:28 https://gvisor.googlesource.com/gvisor master 71d53382bfb3 12365b99 .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2019/03/11 08:21 https://gvisor.googlesource.com/gvisor master fbacb3503916 12365b99 .config console log report syz ci-gvisor-kvm-direct-sandbox
2019/03/06 05:21 https://gvisor.googlesource.com/gvisor master bd46185e24e0 16559f86 .config console log report syz ci-gvisor-kvm-direct-sandbox
2019/03/06 05:07 https://gvisor.googlesource.com/gvisor master bd46185e24e0 16559f86 .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2019/02/23 16:35 https://gvisor.googlesource.com/gvisor master b75aa5150443 18107ce0 .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2019/02/23 16:12 https://gvisor.googlesource.com/gvisor master b2a5ad047a26 18107ce0 .config console log report syz ci-gvisor-kvm-direct-sandbox
2019/02/21 07:06 https://gvisor.googlesource.com/gvisor master b2a5ad047a26 c95f0707 .config console log report syz ci-gvisor-kvm-direct-sandbox
2019/02/20 19:02 https://gvisor.googlesource.com/gvisor master 3e3a1ef9d61f c95f0707 .config console log report syz ci-gvisor-kvm-direct-sandbox
2018/12/24 21:43 https://gvisor.googlesource.com/gvisor master 0df0df35fc4a dd2986b4 .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2018/12/24 15:14 https://gvisor.googlesource.com/gvisor master 0df0df35fc4a be79df56 .config console log report syz ci-gvisor-kvm-direct-sandbox
2018/12/15 23:22 https://gvisor.googlesource.com/gvisor master f74eed464b55 def91db3 .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2018/12/15 04:08 https://gvisor.googlesource.com/gvisor master cd1e9a3fd42f 7624ddd6 .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2018/12/15 03:55 https://gvisor.googlesource.com/gvisor master cd1e9a3fd42f 7624ddd6 .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2018/12/15 03:42 https://gvisor.googlesource.com/gvisor master cd1e9a3fd42f 7624ddd6 .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2018/12/15 03:21 https://gvisor.googlesource.com/gvisor master cd1e9a3fd42f 7624ddd6 .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2018/12/15 02:59 https://gvisor.googlesource.com/gvisor master cd1e9a3fd42f 7624ddd6 .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2018/12/15 02:49 https://gvisor.googlesource.com/gvisor master cd1e9a3fd42f 7624ddd6 .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2018/12/15 01:56 https://gvisor.googlesource.com/gvisor master cd1e9a3fd42f 7624ddd6 .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2018/12/15 01:11 https://gvisor.googlesource.com/gvisor master cd1e9a3fd42f 7624ddd6 .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2018/12/15 01:06 https://gvisor.googlesource.com/gvisor master cd1e9a3fd42f 7624ddd6 .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2018/12/15 00:36 https://gvisor.googlesource.com/gvisor master cd1e9a3fd42f 7624ddd6 .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2018/12/15 00:23 https://gvisor.googlesource.com/gvisor master cd1e9a3fd42f 7624ddd6 .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2018/12/15 00:10 https://gvisor.googlesource.com/gvisor master cd1e9a3fd42f 7624ddd6 .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2018/12/14 23:25 https://gvisor.googlesource.com/gvisor master cd1e9a3fd42f 7624ddd6 .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2018/06/26 14:29 https://gvisor.googlesource.com/gvisor master 9c0c4fd8d05c 089f1181 .config console log report syz ci-gvisor-kvm-direct-sandbox
2020/05/09 03:53 gvisor c59e7b832c1f e97b06d3 .config console log report syz ci-gvisor-kvm-direct-sandbox
2020/04/15 20:33 gvisor c230d12b5ce5 3f3c5574 .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2020/04/11 09:18 gvisor 935007937cee a8c6a3f8 .config console log report syz ci-gvisor-kvm-proxy-overlay-sandbox
2020/09/11 02:18 gvisor 1ab097b08fc1 409809d8 .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/09/08 14:50 gvisor ebf5293374bc abf9ba4f .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/09/08 11:48 gvisor b69352245ab7 abf9ba4f .config console log report ci-gvisor-kvm-direct-sandbox
2020/09/08 10:47 gvisor b69352245ab7 abf9ba4f .config console log report ci-gvisor-kvm-direct-sandbox
2020/09/08 08:14 gvisor ebf5293374bc abf9ba4f .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/09/07 20:20 gvisor b69352245ab7 abf9ba4f .config console log report ci-gvisor-kvm-direct-sandbox
2020/09/07 13:32 gvisor ebf5293374bc abf9ba4f .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/09/07 04:08 gvisor ebf5293374bc abf9ba4f .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/09/05 21:39 gvisor ebf5293374bc abf9ba4f .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/09/05 20:04 gvisor b69352245ab7 abf9ba4f .config console log report ci-gvisor-kvm-direct-sandbox
2020/09/05 17:54 gvisor ebf5293374bc abf9ba4f .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/09/05 14:26 gvisor ebf5293374bc abf9ba4f .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/09/05 13:09 gvisor b69352245ab7 abf9ba4f .config console log report ci-gvisor-kvm-direct-sandbox
2020/09/05 11:06 gvisor b69352245ab7 abf9ba4f .config console log report ci-gvisor-kvm-direct-sandbox
2020/09/05 06:09 gvisor ebf5293374bc abf9ba4f .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/09/05 01:15 gvisor ebf5293374bc abf9ba4f .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/09/04 20:24 gvisor ebf5293374bc abf9ba4f .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/09/04 17:37 gvisor ebf5293374bc abf9ba4f .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/09/04 15:32 gvisor ebf5293374bc abf9ba4f .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/09/04 11:22 gvisor b69352245ab7 abf9ba4f .config console log report ci-gvisor-kvm-direct-sandbox
2020/09/04 02:02 gvisor b69352245ab7 abf9ba4f .config console log report ci-gvisor-kvm-direct-sandbox
2020/09/04 00:33 gvisor ebf5293374bc abf9ba4f .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/09/03 20:09 gvisor b69352245ab7 abf9ba4f .config console log report ci-gvisor-kvm-direct-sandbox
2020/09/03 18:22 gvisor b69352245ab7 abf9ba4f .config console log report ci-gvisor-kvm-direct-sandbox
2020/09/03 17:08 gvisor b69352245ab7 abf9ba4f .config console log report ci-gvisor-kvm-direct-sandbox
2020/09/01 15:32 gvisor 7bc9f9b47f61 d5a3ae1f .config console log report ci-gvisor-kvm-direct-sandbox
2020/09/01 12:18 gvisor ebf5293374bc d5a3ae1f .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/09/01 10:45 gvisor 7bc9f9b47f61 d5a3ae1f .config console log report ci-gvisor-kvm-direct-sandbox
2020/08/31 04:37 gvisor ebf5293374bc d5a3ae1f .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/08/30 16:53 gvisor 7bc9f9b47f61 d5a3ae1f .config console log report ci-gvisor-kvm-direct-sandbox
2020/08/30 00:00 gvisor ebf5293374bc d5a3ae1f .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/08/25 23:59 gvisor c61f6fcf6ab3 344da168 .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/08/25 21:34 gvisor c61f6fcf6ab3 344da168 .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/08/25 06:02 gvisor 2b0b5e25210e 622e52f4 .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/08/24 05:46 gvisor e7270096a7fb 1da71ab0 .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/08/23 06:32 gvisor e7270096a7fb 1da71ab0 .config console log report ci-gvisor-kvm-direct-sandbox
2020/08/22 18:37 gvisor 73c69cb4d8e7 6436ce4b .config console log report ci-gvisor-kvm-direct-sandbox
2020/08/22 17:17 gvisor 0324b94a73fe 6436ce4b .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/08/22 15:39 gvisor 0324b94a73fe 6436ce4b .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/08/22 13:46 gvisor 73c69cb4d8e7 6436ce4b .config console log report ci-gvisor-kvm-direct-sandbox
2020/08/22 12:10 gvisor 0324b94a73fe 6436ce4b .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/08/20 17:20 gvisor 9da77d00fa68 ed282a3a .config console log report ci-gvisor-kvm-direct-sandbox
2020/08/19 02:02 gvisor 988ab2705882 635f68f6 .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2018/06/22 20:07 https://gvisor.googlesource.com/gvisor master 5d45f88f2c28 b9c7c319 .config console log report ci-gvisor-kvm-direct-sandbox
* Struck through repros no longer work on HEAD.