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AJvYcCX+0zZVoT62E4tW6yPLI/6Xf9DnygCm9Pim+wTftQ7WOcxEvOHJg25Y157bvxZ4ubJosKQXEzxDgMJWpe0=@vger.kernel.org X-Gm-Message-State: AOJu0YzNX5wnD5pLfGKx/vsQXBHLXKE1gVGzpxMACqSPUTlDddTuOOJ7 +sLyxhLKlN5c+KAlWq3NyPr8+RMeITmLPMoxEHH3AVoQ91kYYp9t5ry55N4C87JZh1sQeCtRi3D QtZ/FFMO9a2nbhZsBPPQhnRaJIkbGCfoXrEWsrwYCnWY1dOVaS9MrgUivm+c= X-Google-Smtp-Source: AGHT+IG6yUJl4sS3/QYXij4thj8qhD6XwowNtnJJOPiqgxDDee3pVBnUpYxhVDuBnnta/fj+Tc+92TzIJAAbnHIj1DT5IL/ZEX3k Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:b29:b0:433:3664:b19b with SMTP id e9e14a558f8ab-4335f493325mr35894675ab.15.1762510202651; Fri, 07 Nov 2025 02:10:02 -0800 (PST) Date: Fri, 07 Nov 2025 02:10:02 -0800 In-Reply-To: <20251107085422.8964-1-hdanton@sina.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <690dc57a.a70a0220.22f260.0032.GAE@google.com> Subject: Re: [syzbot] [fs?] WARNING in destroy_super_work From: syzbot To: hdanton@sina.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hello, syzbot tried to test the proposed patch but the build/boot failed: WARNING in put_mnt_ns ------------[ cut here ]------------ WARNING: ./include/linux/ns_common.h:255 at __ns_ref_put include/linux/ns_c= ommon.h:255 [inline], CPU#0: syz-executor/5842 WARNING: ./include/linux/ns_common.h:255 at put_mnt_ns+0x152/0x190 fs/names= pace.c:6048, CPU#0: syz-executor/5842 Modules linked in: CPU: 0 UID: 65534 PID: 5842 Comm: syz-executor Not tainted syzkaller #0 PRE= EMPT(full)=20 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Goo= gle 10/02/2025 RIP: 0010:__ns_ref_put include/linux/ns_common.h:255 [inline] RIP: 0010:put_mnt_ns+0x152/0x190 fs/namespace.c:6048 Code: 79 00 00 bf 01 00 00 00 89 ee e8 69 84 7d ff 85 ed 7e 1f e8 20 80 7d = ff 5b 41 5e 41 5f 5d e9 55 1f 1b 09 cc e8 0f 80 7d ff 90 <0f> 0b 90 e9 33 f= f ff ff e8 01 80 7d ff 4c 89 f7 be 03 00 00 00 5b RSP: 0018:ffffc90003eefa68 EFLAGS: 00010293 RAX: ffffffff8243fed1 RBX: ffff88802fc3f400 RCX: ffff88802e13bd00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffff88802fc3f4bb R09: 1ffff11005f87e97 R10: dffffc0000000000 R11: ffffed1005f87e98 R12: dffffc0000000000 R13: 0000000000000009 R14: ffff88802fc3f4b8 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888125ec2000(0000) knlGS:000000000000000= 0 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f87b83b11b8 CR3: 0000000072322000 CR4: 00000000003526f0 Call Trace: free_nsproxy+0x46/0x560 kernel/nsproxy.c:192 do_exit+0x6b8/0x2300 kernel/exit.c:969 do_group_exit+0x21c/0x2d0 kernel/exit.c:1111 get_signal+0x1285/0x1340 kernel/signal.c:3034 arch_do_signal_or_restart+0x9a/0x7a0 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline] exit_to_user_mode_loop+0x87/0x4f0 kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [in= line] syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline] do_syscall_64+0x2e9/0xfa0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7feae338d6ba Code: Unable to access opcode bytes at 0x7feae338d690. RSP: 002b:00007ffc8284b0b8 EFLAGS: 00000286 ORIG_RAX: 0000000000000106 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007feae338d6ba RDX: 00007ffc8284b0e0 RSI: 00007ffc8284b170 RDI: 00000000ffffff9c RBP: 00007ffc8284b170 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000286 R12: 00007ffc8284c200 R13: 00007feae3411d7d R14: 000000000001439b R15: 00007ffc8284c240 Warning: Permanently added '10.128.1.3' (ED25519) to the list of known host= s. 2025/11/07 10:09:29 parsed 1 programs [ 78.288542][ T5828] cgroup: Unknown subsys name 'net' [ 78.416733][ T5828] cgroup: Unknown subsys name 'cpuset' [ 78.426689][ T5828] cgroup: Unknown subsys name 'rlimit' [ 79.889458][ T5828] Adding 124996k swap on ./swap-file. Priority:0 exte= nts:1 across:124996k=20 [ 82.629193][ T5847] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > = 1 [ 82.638151][ T5847] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > = 9 [ 82.647237][ T5847] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > = 9 [ 82.664577][ T5847] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > = 4 [ 82.682261][ T5847] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > = 2 [ 82.921495][ T5842] ------------[ cut here ]------------ [ 82.927200][ T5842] WARNING: ./include/linux/ns_common.h:255 at put_mnt_= ns+0x152/0x190, CPU#0: syz-executor/5842 [ 82.937894][ T5842] Modules linked in: [ 82.941836][ T5842] CPU: 0 UID: 65534 PID: 5842 Comm: syz-executor Not t= ainted syzkaller #0 PREEMPT(full)=20 [ 82.951938][ T5842] Hardware name: Google Google Compute Engine/Google C= ompute Engine, BIOS Google 10/02/2025 [ 82.962381][ T5842] RIP: 0010:put_mnt_ns+0x152/0x190 [ 82.967868][ T5842] Code: 79 00 00 bf 01 00 00 00 89 ee e8 69 84 7d ff 8= 5 ed 7e 1f e8 20 80 7d ff 5b 41 5e 41 5f 5d e9 55 1f 1b 09 cc e8 0f 80 7d f= f 90 <0f> 0b 90 e9 33 ff ff ff e8 01 80 7d ff 4c 89 f7 be 03 00 00 00 5b [ 82.987767][ T5842] RSP: 0018:ffffc90003eefa68 EFLAGS: 00010293 [ 82.993919][ T5842] RAX: ffffffff8243fed1 RBX: ffff88802fc3f400 RCX: fff= f88802e13bd00 [ 83.002172][ T5842] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000= 0000000000000 [ 83.010751][ T5842] RBP: 0000000000000001 R08: ffff88802fc3f4bb R09: 1ff= ff11005f87e97 [ 83.020230][ T5842] R10: dffffc0000000000 R11: ffffed1005f87e98 R12: dff= ffc0000000000 [ 83.029164][ T5842] R13: 0000000000000009 R14: ffff88802fc3f4b8 R15: dff= ffc0000000000 [ 83.037473][ T5842] FS: 0000000000000000(0000) GS:ffff888125ec2000(0000= ) knlGS:0000000000000000 [ 83.046645][ T5842] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 83.053615][ T5842] CR2: 00007f87b83b11b8 CR3: 0000000072322000 CR4: 000= 00000003526f0 [ 83.061783][ T5842] Call Trace: [ 83.065143][ T5842] [ 83.068100][ T5842] free_nsproxy+0x46/0x560 [ 83.072540][ T5842] do_exit+0x6b8/0x2300 [ 83.076810][ T5842] ? do_raw_spin_lock+0x121/0x290 [ 83.081866][ T5842] ? __pfx_do_exit+0x10/0x10 [ 83.086652][ T5842] do_group_exit+0x21c/0x2d0 [ 83.091298][ T5842] ? lockdep_hardirqs_on+0x9c/0x150 [ 83.096895][ T5842] get_signal+0x1285/0x1340 [ 83.101440][ T5842] arch_do_signal_or_restart+0x9a/0x7a0 [ 83.107287][ T5842] ? __pfx___x64_sys_newfstatat+0x10/0x10 [ 83.113020][ T5842] ? __pfx_arch_do_signal_or_restart+0x10/0x10 [ 83.119908][ T5842] ? exit_to_user_mode_loop+0x55/0x4f0 [ 83.125440][ T5842] exit_to_user_mode_loop+0x87/0x4f0 [ 83.130743][ T5842] ? rcu_is_watching+0x15/0xb0 [ 83.135661][ T5842] do_syscall_64+0x2e9/0xfa0 [ 83.140369][ T5842] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 83.146684][ T5842] ? clear_bhb_loop+0x60/0xb0 [ 83.152080][ T5842] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 83.158131][ T5842] RIP: 0033:0x7feae338d6ba [ 83.162655][ T5842] Code: Unable to access opcode bytes at 0x7feae338d69= 0. [ 83.169945][ T5842] RSP: 002b:00007ffc8284b0b8 EFLAGS: 00000286 ORIG_RAX= : 0000000000000106 [ 83.178597][ T5842] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000= 07feae338d6ba [ 83.186812][ T5842] RDX: 00007ffc8284b0e0 RSI: 00007ffc8284b170 RDI: 000= 00000ffffff9c [ 83.195470][ T5842] RBP: 00007ffc8284b170 R08: 0000000000000000 R09: 000= 0000000000000 [ 83.203858][ T5842] R10: 0000000000000100 R11: 0000000000000286 R12: 000= 07ffc8284c200 [ 83.211844][ T5842] R13: 00007feae3411d7d R14: 000000000001439b R15: 000= 07ffc8284c240 [ 83.220362][ T5842] [ 83.223447][ T5842] Kernel panic - not syncing: kernel: panic_on_warn se= t ... [ 83.230752][ T5842] CPU: 0 UID: 65534 PID: 5842 Comm: syz-executor Not t= ainted syzkaller #0 PREEMPT(full)=20 [ 83.240723][ T5842] Hardware name: Google Google Compute Engine/Google C= ompute Engine, BIOS Google 10/02/2025 [ 83.250865][ T5842] Call Trace: [ 83.254246][ T5842] [ 83.257384][ T5842] dump_stack_lvl+0x99/0x250 [ 83.262068][ T5842] ? __asan_memcpy+0x40/0x70 [ 83.266749][ T5842] ? __pfx_dump_stack_lvl+0x10/0x10 [ 83.271940][ T5842] ? __pfx__printk+0x10/0x10 [ 83.276615][ T5842] vpanic+0x237/0x6d0 [ 83.280587][ T5842] ? __pfx_vpanic+0x10/0x10 [ 83.285341][ T5842] ? is_bpf_text_address+0x292/0x2b0 [ 83.290628][ T5842] ? is_bpf_text_address+0x26/0x2b0 [ 83.296081][ T5842] panic+0xb9/0xc0 [ 83.300039][ T5842] ? __pfx_panic+0x10/0x10 [ 83.304452][ T5842] __warn+0x334/0x4c0 [ 83.308596][ T5842] ? put_mnt_ns+0x152/0x190 [ 83.313099][ T5842] ? put_mnt_ns+0x152/0x190 [ 83.317691][ T5842] report_bug+0x2be/0x4f0 [ 83.322014][ T5842] ? put_mnt_ns+0x152/0x190 [ 83.326942][ T5842] ? put_mnt_ns+0x152/0x190 [ 83.331541][ T5842] ? put_mnt_ns+0x154/0x190 [ 83.336057][ T5842] handle_bug+0x84/0x160 [ 83.340300][ T5842] exc_invalid_op+0x1a/0x50 [ 83.344913][ T5842] asm_exc_invalid_op+0x1a/0x20 [ 83.349840][ T5842] RIP: 0010:put_mnt_ns+0x152/0x190 [ 83.355313][ T5842] Code: 79 00 00 bf 01 00 00 00 89 ee e8 69 84 7d ff 8= 5 ed 7e 1f e8 20 80 7d ff 5b 41 5e 41 5f 5d e9 55 1f 1b 09 cc e8 0f 80 7d f= f 90 <0f> 0b 90 e9 33 ff ff ff e8 01 80 7d ff 4c 89 f7 be 03 00 00 00 5b [ 83.375977][ T5842] RSP: 0018:ffffc90003eefa68 EFLAGS: 00010293 [ 83.382309][ T5842] RAX: ffffffff8243fed1 RBX: ffff88802fc3f400 RCX: fff= f88802e13bd00 [ 83.390278][ T5842] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000= 0000000000000 [ 83.398243][ T5842] RBP: 0000000000000001 R08: ffff88802fc3f4bb R09: 1ff= ff11005f87e97 [ 83.406469][ T5842] R10: dffffc0000000000 R11: ffffed1005f87e98 R12: dff= ffc0000000000 [ 83.414604][ T5842] R13: 0000000000000009 R14: ffff88802fc3f4b8 R15: dff= ffc0000000000 [ 83.422581][ T5842] ? put_mnt_ns+0x151/0x190 [ 83.427262][ T5842] ? put_mnt_ns+0x151/0x190 [ 83.431955][ T5842] free_nsproxy+0x46/0x560 [ 83.436568][ T5842] do_exit+0x6b8/0x2300 [ 83.440872][ T5842] ? do_raw_spin_lock+0x121/0x290 [ 83.446184][ T5842] ? __pfx_do_exit+0x10/0x10 [ 83.450965][ T5842] do_group_exit+0x21c/0x2d0 [ 83.455810][ T5842] ? lockdep_hardirqs_on+0x9c/0x150 [ 83.461175][ T5842] get_signal+0x1285/0x1340 [ 83.465772][ T5842] arch_do_signal_or_restart+0x9a/0x7a0 [ 83.471517][ T5842] ? __pfx___x64_sys_newfstatat+0x10/0x10 [ 83.477333][ T5842] ? __pfx_arch_do_signal_or_restart+0x10/0x10 [ 83.483629][ T5842] ? exit_to_user_mode_loop+0x55/0x4f0 [ 83.489447][ T5842] exit_to_user_mode_loop+0x87/0x4f0 [ 83.495157][ T5842] ? rcu_is_watching+0x15/0xb0 [ 83.500008][ T5842] do_syscall_64+0x2e9/0xfa0 [ 83.504738][ T5842] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 83.510801][ T5842] ? clear_bhb_loop+0x60/0xb0 [ 83.515473][ T5842] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 83.521699][ T5842] RIP: 0033:0x7feae338d6ba [ 83.526273][ T5842] Code: Unable to access opcode bytes at 0x7feae338d69= 0. [ 83.533448][ T5842] RSP: 002b:00007ffc8284b0b8 EFLAGS: 00000286 ORIG_RAX= : 0000000000000106 [ 83.541954][ T5842] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000= 07feae338d6ba [ 83.549920][ T5842] RDX: 00007ffc8284b0e0 RSI: 00007ffc8284b170 RDI: 000= 00000ffffff9c [ 83.558226][ T5842] RBP: 00007ffc8284b170 R08: 0000000000000000 R09: 000= 0000000000000 [ 83.566282][ T5842] R10: 0000000000000100 R11: 0000000000000286 R12: 000= 07ffc8284c200 [ 83.574415][ T5842] R13: 00007feae3411d7d R14: 000000000001439b R15: 000= 07ffc8284c240 [ 83.582562][ T5842] [ 83.585836][ T5842] Kernel Offset: disabled [ 83.590261][ T5842] Rebooting in 86400 seconds.. syzkaller build log: go env (err=3D) AR=3D'ar' CC=3D'gcc' CGO_CFLAGS=3D'-O2 -g' CGO_CPPFLAGS=3D'' CGO_CXXFLAGS=3D'-O2 -g' CGO_ENABLED=3D'1' CGO_FFLAGS=3D'-O2 -g' CGO_LDFLAGS=3D'-O2 -g' CXX=3D'g++' GCCGO=3D'gccgo' GO111MODULE=3D'auto' GOAMD64=3D'v1' GOARCH=3D'amd64' GOAUTH=3D'netrc' GOBIN=3D'' GOCACHE=3D'/syzkaller/.cache/go-build' GOCACHEPROG=3D'' GODEBUG=3D'' GOENV=3D'/syzkaller/.config/go/env' GOEXE=3D'' GOEXPERIMENT=3D'' GOFIPS140=3D'off' GOFLAGS=3D'' GOGCCFLAGS=3D'-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=3D0= -ffile-prefix-map=3D/tmp/go-build1062286916=3D/tmp/go-build -gno-record-gc= c-switches' GOHOSTARCH=3D'amd64' GOHOSTOS=3D'linux' GOINSECURE=3D'' GOMOD=3D'/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/go.mo= d' GOMODCACHE=3D'/syzkaller/jobs/linux/gopath/pkg/mod' GONOPROXY=3D'' GONOSUMDB=3D'' GOOS=3D'linux' GOPATH=3D'/syzkaller/jobs/linux/gopath' GOPRIVATE=3D'' GOPROXY=3D'https://proxy.golang.org,direct' GOROOT=3D'/usr/local/go' GOSUMDB=3D'sum.golang.org' GOTELEMETRY=3D'local' GOTELEMETRYDIR=3D'/syzkaller/.config/go/telemetry' GOTMPDIR=3D'' GOTOOLCHAIN=3D'auto' GOTOOLDIR=3D'/usr/local/go/pkg/tool/linux_amd64' GOVCS=3D'' GOVERSION=3D'go1.24.4' GOWORK=3D'' PKG_CONFIG=3D'pkg-config' git status (err=3D) HEAD detached at 2c50b6a91af nothing to commit, working tree clean tput: No value for $TERM and no -T specified tput: No value for $TERM and no -T specified Makefile:31: run command via tools/syz-env for best compatibility, see: Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contribut= ing.md#using-syz-env go list -f '{{.Stale}}' -ldflags=3D"-s -w -X github.com/google/syzkaller/pr= og.GitRevision=3D2c50b6a91afe391fad4d14f7b7d7167d570089dd -X github.com/goo= gle/syzkaller/prog.gitRevisionDate=3D20251030-144239" ./sys/syz-sysgen | g= rep -q false || go install -ldflags=3D"-s -w -X github.com/google/syzkaller= /prog.GitRevision=3D2c50b6a91afe391fad4d14f7b7d7167d570089dd -X github.com/= google/syzkaller/prog.gitRevisionDate=3D20251030-144239" ./sys/syz-sysgen make .descriptions tput: No value for $TERM and no -T specified tput: No value for $TERM and no -T specified Makefile:31: run command via tools/syz-env for best compatibility, see: Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contribut= ing.md#using-syz-env bin/syz-sysgen touch .descriptions GOOS=3Dlinux GOARCH=3Damd64 go build -ldflags=3D"-s -w -X github.com/google= /syzkaller/prog.GitRevision=3D2c50b6a91afe391fad4d14f7b7d7167d570089dd -X g= ithub.com/google/syzkaller/prog.gitRevisionDate=3D20251030-144239" -o ./bi= n/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog mkdir -p ./bin/linux_amd64 g++ -o ./bin/linux_amd64/syz-executor executor/executor.cc \ -m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wfr= ame-larger-than=3D16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-forma= t-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -= static-pie -std=3Dc++17 -I. -Iexecutor/_include -DGOOS_linux=3D1 -DGOARCH= _amd64=3D1 \ -DHOSTGOOS_linux=3D1 -DGIT_REVISION=3D\"2c50b6a91afe391fad4d14f7b7d7167d57= 0089dd\" /usr/bin/ld: /tmp/ccgWstkz.o: in function `Connection::Connect(char const*,= char const*)': executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEP= KcS1_]+0x104): warning: Using 'gethostbyname' in statically linked applicat= ions requires at runtime the shared libraries from the glibc version used f= or linking ./tools/check-syzos.sh 2>/dev/null Tested on: commit: 9c0826a5 Add linux-next specific files for 20251107 git tree: linux-next kernel config: https://syzkaller.appspot.com/x/.config?x=3Df2ebeee52bf052b= 8 dashboard link: https://syzkaller.appspot.com/bug?extid=3D1957b26299cf3ff78= 90c compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-= 1~exp1~20250708183702.136), Debian LLD 20.1.8 patch: https://syzkaller.appspot.com/x/patch.diff?x=3D159511145800= 00