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Message-ID: <78798afb-8b11-4229-bd8a-6b441d967a57@amd.com>
Date: Wed, 30 Apr 2025 13:28:54 +0530
From: Shivank Garg <shivankg@....com>
To: syzbot <syzbot+8bb6fd945af4e0ad9299@...kaller.appspotmail.com>,
linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [mm?] WARNING in move_to_new_folio
Hi,
I think the issue is due to e7021e2fe0 as described below:
https://lore.kernel.org/all/SJ1PR11MB6129E62E3B372932C6B7477FB9BD2@SJ1PR11MB6129.namprd11.prod.outlook.com/
Trying again after reverting this patch:
#syz test: https://github.com/shivankgarg98/linux.git 5d98b45ab
On 4/30/2025 1:00 PM, syzbot wrote:
> Hello,
>
> syzbot tried to test the proposed patch but the build/boot failed:
>
> ed.
> [ 1.681174][ T0] Tracing variant of Tasks RCU enabled.
> [ 1.681902][ T0] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
> [ 1.683059][ T0] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
> [ 1.684680][ T0] Running RCU synchronous self tests
> [ 1.685620][ T0] RCU Tasks: Setting shift to 1 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=2.
> [ 1.686925][ T0] RCU Tasks Trace: Setting shift to 1 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=2.
> [ 1.823163][ T0] NR_IRQS: 4352, nr_irqs: 440, preallocated irqs: 16
> [ 1.825139][ T0] rcu: srcu_init: Setting srcu_struct sizes based on contention.
> [ 1.826579][ T0] kfence: initialized - using 2097152 bytes for 255 objects at 0xffff88823be00000-0xffff88823c000000
> [ 1.829232][ T0] Console: colour VGA+ 80x25
> [ 1.829978][ T0] printk: legacy console [ttyS0] enabled
> [ 1.829978][ T0] printk: legacy console [ttyS0] enabled
> [ 1.831736][ T0] printk: legacy bootconsole [earlyser0] disabled
> [ 1.831736][ T0] printk: legacy bootconsole [earlyser0] disabled
> [ 1.833514][ T0] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
> [ 1.834681][ T0] ... MAX_LOCKDEP_SUBCLASSES: 8
> [ 1.835518][ T0] ... MAX_LOCK_DEPTH: 48
> [ 1.836336][ T0] ... MAX_LOCKDEP_KEYS: 8192
> [ 1.837124][ T0] ... CLASSHASH_SIZE: 4096
> [ 1.838035][ T0] ... MAX_LOCKDEP_ENTRIES: 1048576
> [ 1.838801][ T0] ... MAX_LOCKDEP_CHAINS: 1048576
> [ 1.839561][ T0] ... CHAINHASH_SIZE: 524288
> [ 1.840423][ T0] memory used by lock dependency info: 106625 kB
> [ 1.841405][ T0] memory used for stack traces: 8320 kB
> [ 1.842304][ T0] per task-struct memory footprint: 1920 bytes
> [ 1.843565][ T0] mempolicy: Enabling automatic NUMA balancing. Configure with numa_balancing= or the kernel.numa_balancing sysctl
> [ 1.845316][ T0] ACPI: Core revision 20241212
> [ 1.846971][ T0] APIC: Switch to symmetric I/O mode setup
> [ 1.848285][ T0] x2apic enabled
> [ 1.852223][ T0] APIC: Switched APIC routing to: physical x2apic
> [ 1.859089][ T0] ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1
> [ 1.860641][ T0] clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x1fb6f3811e0, max_idle_ns: 440795202126 ns
> [ 1.862247][ T0] Calibrating delay loop (skipped) preset value.. 4400.40 BogoMIPS (lpj=22002040)
> [ 1.864112][ T0] Last level iTLB entries: 4KB 64, 2MB 8, 4MB 8
> [ 1.865179][ T0] Last level dTLB entries: 4KB 64, 2MB 32, 4MB 32, 1GB 4
> [ 1.866500][ T0] Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
> [ 1.872389][ T0] Spectre V2 : Spectre BHI mitigation: SW BHB clearing on syscall and VM exit
> [ 1.874070][ T0] Spectre V2 : Mitigation: IBRS
> [ 1.875161][ T0] Spectre V2 : Spectre v2 / SpectreRSB: Filling RSB on context switch and VMEXIT
> [ 1.876856][ T0] RETBleed: Mitigation: IBRS
> [ 1.878026][ T0] Spectre V2 : mitigation: Enabling conditional Indirect Branch Prediction Barrier
> [ 1.879710][ T0] Spectre V2 : User space: Mitigation: STIBP via prctl
> [ 1.882307][ T0] Speculative Store Bypass: Mitigation: Speculative Store Bypass disabled via prctl
> [ 1.883734][ T0] MDS: Mitigation: Clear CPU buffers
> [ 1.884454][ T0] TAA: Mitigation: Clear CPU buffers
> [ 1.885363][ T0] MMIO Stale Data: Vulnerable: Clear CPU buffers attempted, no microcode
> [ 1.886952][ T0] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
> [ 1.888547][ T0] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
> [ 1.889823][ T0] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
> [ 1.890929][ T0] x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256
> [ 1.892240][ T0] x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format.
> [ 2.193671][ T0] Freeing SMP alternatives memory: 132K
> [ 2.194604][ T0] pid_max: default: 32768 minimum: 301
> [ 2.196277][ T0] LSM: initializing lsm=lockdown,capability,landlock,yama,safesetid,tomoyo,apparmor,bpf,ima,evm
> [ 2.198299][ T0] landlock: Up and running.
> [ 2.198925][ T0] Yama: becoming mindful.
> [ 2.199858][ T0] TOMOYO Linux initialized
> [ 2.201374][ T0] AppArmor: AppArmor initialized
> [ 2.203589][ T0] LSM support for eBPF active
> [ 2.210200][ T0] Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes, vmalloc hugepage)
> [ 2.214840][ T0] Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes, vmalloc hugepage)
> [ 2.216675][ T0] Mount-cache hash table entries: 16384 (order: 5, 131072 bytes, vmalloc)
> [ 2.218347][ T0] Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes, vmalloc)
> [ 2.224475][ T0] Running RCU synchronous self tests
> [ 2.225441][ T0] Running RCU synchronous self tests
> [ 2.347377][ T1] smpboot: CPU0: Intel(R) Xeon(R) CPU @ 2.20GHz (family: 0x6, model: 0x4f, stepping: 0x0)
> [ 2.351817][ T9] ------------[ cut here ]------------
> [ 2.352232][ T9] WARNING: CPU: 0 PID: 9 at arch/x86/mm/tlb.c:919 switch_mm_irqs_off+0x640/0x7c0
> [ 2.352232][ T9] Modules linked in:
> [ 2.352232][ T9] CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted 6.15.0-rc4-next-20250428-syzkaller-dirty #0 PREEMPT(full)
> [ 2.352232][ T9] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
> [ 2.352232][ T9] Workqueue: events once_deferred
> [ 2.352232][ T9] RIP: 0010:switch_mm_irqs_off+0x640/0x7c0
> [ 2.352232][ T9] Code: 84 f4 fa ff ff 90 0f 0b 90 e9 eb fa ff ff 90 0f 0b 90 e9 84 fe ff ff 90 0f 0b 90 e9 18 fc ff ff 90 0f 0b 90 e9 cb fb ff ff 90 <0f> 0b 90 e9 df fb ff ff 89 c8 90 0f 0b 90 e9 3f fd ff ff 90 0f 0b
> [ 2.352232][ T9] RSP: 0000:ffffc900000e7720 EFLAGS: 00010056
> [ 2.352232][ T9] RAX: 0000000000000001 RBX: ffff88801a070940 RCX: ffffffff8173b01d
> [ 2.352232][ T9] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88801a070940
> [ 2.352232][ T9] RBP: ffffc900000e77f0 R08: ffff88801a070947 R09: 1ffff1100340e128
> [ 2.352232][ T9] R10: dffffc0000000000 R11: ffffed100340e129 R12: 1ffff110037d70ab
> [ 2.352232][ T9] R13: ffffffff8e0467c0 R14: ffff88801beb8000 R15: 0000000000000000
> [ 2.352232][ T9] FS: 0000000000000000(0000) GS:ffff8881260a1000(0000) knlGS:0000000000000000
> [ 2.352232][ T9] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 2.352232][ T9] CR2: ffff88823ffff000 CR3: 000000001a078000 CR4: 00000000003506f0
> [ 2.352232][ T9] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [ 2.352232][ T9] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> [ 2.352232][ T9] Call Trace:
> [ 2.352232][ T9] <TASK>
> [ 2.352232][ T9] ? __pfx_switch_mm_irqs_off+0x10/0x10
> [ 2.352232][ T9] ? __text_poke+0x5a4/0x980
> [ 2.352232][ T9] ? kasan_check_range+0x29a/0x2b0
> [ 2.352232][ T9] ? serial8250_isa_init_ports+0x63/0xf0
> [ 2.352232][ T9] unuse_temporary_mm+0x9d/0x100
> [ 2.352232][ T9] __text_poke+0x634/0x980
> [ 2.352232][ T9] ? serial8250_isa_init_ports+0x63/0xf0
> [ 2.352232][ T9] ? __pfx_text_poke_memcpy+0x10/0x10
> [ 2.352232][ T9] ? __pfx___text_poke+0x10/0x10
> [ 2.352232][ T9] ? rcu_is_watching+0x15/0xb0
> [ 2.352232][ T9] ? trace_contention_end+0x39/0x120
> [ 2.352232][ T9] smp_text_poke_batch_finish+0x38c/0x1100
> [ 2.352232][ T9] ? __pfx___mutex_lock+0x10/0x10
> [ 2.352232][ T9] ? __pfx_smp_text_poke_batch_finish+0x10/0x10
> [ 2.352232][ T9] ? arch_jump_label_transform_queue+0x97/0x110
> [ 2.352232][ T9] ? __jump_label_update+0x37e/0x3a0
> [ 2.352232][ T9] arch_jump_label_transform_apply+0x1c/0x30
> [ 2.352232][ T9] static_key_disable_cpuslocked+0xc5/0x1b0
> [ 2.352232][ T9] static_key_disable+0x1a/0x20
> [ 2.352232][ T9] once_deferred+0x6f/0xb0
> [ 2.352232][ T9] ? process_scheduled_works+0x9ef/0x17b0
> [ 2.352232][ T9] process_scheduled_works+0xade/0x17b0
> [ 2.352232][ T9] ? __pfx_process_scheduled_works+0x10/0x10
> [ 2.352232][ T9] worker_thread+0x8a0/0xda0
> [ 2.352232][ T9] kthread+0x70e/0x8a0
> [ 2.352232][ T9] ? __pfx_worker_thread+0x10/0x10
> [ 2.352232][ T9] ? __pfx_kthread+0x10/0x10
> [ 2.352232][ T9] ? __pfx_kthread+0x10/0x10
> [ 2.352232][ T9] ? _raw_spin_unlock_irq+0x23/0x50
> [ 2.352232][ T9] ? lockdep_hardirqs_on+0x9c/0x150
> [ 2.352232][ T9] ? __pfx_kthread+0x10/0x10
> [ 2.352232][ T9] ret_from_fork+0x4b/0x80
> [ 2.352232][ T9] ? __pfx_kthread+0x10/0x10
> [ 2.352232][ T9] ret_from_fork_asm+0x1a/0x30
> [ 2.352232][ T9] </TASK>
> [ 2.352232][ T9] Kernel panic - not syncing: kernel: panic_on_warn set ...
> [ 2.352232][ T9] CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted 6.15.0-rc4-next-20250428-syzkaller-dirty #0 PREEMPT(full)
> [ 2.352232][ T9] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
> [ 2.352232][ T9] Workqueue: events once_deferred
> [ 2.352232][ T9] Call Trace:
> [ 2.352232][ T9] <TASK>
> [ 2.352232][ T9] dump_stack_lvl+0x99/0x250
> [ 2.352232][ T9] ? __asan_memcpy+0x40/0x70
> [ 2.352232][ T9] ? __pfx_dump_stack_lvl+0x10/0x10
> [ 2.352232][ T9] ? __pfx__printk+0x10/0x10
> [ 2.352232][ T9] panic+0x2db/0x790
> [ 2.352232][ T9] ? __pfx_panic+0x10/0x10
> [ 2.352232][ T9] ? show_trace_log_lvl+0x4fb/0x550
> [ 2.352232][ T9] ? ret_from_fork_asm+0x1a/0x30
> [ 2.352232][ T9] __warn+0x31b/0x4b0
> [ 2.352232][ T9] ? switch_mm_irqs_off+0x640/0x7c0
> [ 2.352232][ T9] ? switch_mm_irqs_off+0x640/0x7c0
> [ 2.352232][ T9] report_bug+0x2be/0x4f0
> [ 2.352232][ T9] ? switch_mm_irqs_off+0x640/0x7c0
> [ 2.352232][ T9] ? switch_mm_irqs_off+0x640/0x7c0
> [ 2.352232][ T9] ? switch_mm_irqs_off+0x642/0x7c0
> [ 2.352232][ T9] handle_bug+0x84/0x160
> [ 2.352232][ T9] exc_invalid_op+0x1a/0x50
> [ 2.352232][ T9] asm_exc_invalid_op+0x1a/0x20
> [ 2.352232][ T9] RIP: 0010:switch_mm_irqs_off+0x640/0x7c0
> [ 2.352232][ T9] Code: 84 f4 fa ff ff 90 0f 0b 90 e9 eb fa ff ff 90 0f 0b 90 e9 84 fe ff ff 90 0f 0b 90 e9 18 fc ff ff 90 0f 0b 90 e9 cb fb ff ff 90 <0f> 0b 90 e9 df fb ff ff 89 c8 90 0f 0b 90 e9 3f fd ff ff 90 0f 0b
> [ 2.352232][ T9] RSP: 0000:ffffc900000e7720 EFLAGS: 00010056
> [ 2.352232][ T9] RAX: 0000000000000001 RBX: ffff88801a070940 RCX: ffffffff8173b01d
> [ 2.352232][ T9] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88801a070940
> [ 2.352232][ T9] RBP: ffffc900000e77f0 R08: ffff88801a070947 R09: 1ffff1100340e128
> [ 2.352232][ T9] R10: dffffc0000000000 R11: ffffed100340e129 R12: 1ffff110037d70ab
> [ 2.352232][ T9] R13: ffffffff8e0467c0 R14: ffff88801beb8000 R15: 0000000000000000
> [ 2.352232][ T9] ? switch_mm_irqs_off+0x21d/0x7c0
> [ 2.352232][ T9] ? __pfx_switch_mm_irqs_off+0x10/0x10
> [ 2.352232][ T9] ? __text_poke+0x5a4/0x980
> [ 2.352232][ T9] ? kasan_check_range+0x29a/0x2b0
> [ 2.352232][ T9] ? serial8250_isa_init_ports+0x63/0xf0
> [ 2.352232][ T9] unuse_temporary_mm+0x9d/0x100
> [ 2.352232][ T9] __text_poke+0x634/0x980
> [ 2.352232][ T9] ? serial8250_isa_init_ports+0x63/0xf0
> [ 2.352232][ T9] ? __pfx_text_poke_memcpy+0x10/0x10
> [ 2.352232][ T9] ? __pfx___text_poke+0x10/0x10
> [ 2.352232][ T9] ? rcu_is_watching+0x15/0xb0
> [ 2.352232][ T9] ? trace_contention_end+0x39/0x120
> [ 2.352232][ T9] smp_text_poke_batch_finish+0x38c/0x1100
> [ 2.352232][ T9] ? __pfx___mutex_lock+0x10/0x10
> [ 2.352232][ T9] ? __pfx_smp_text_poke_batch_finish+0x10/0x10
> [ 2.352232][ T9] ? arch_jump_label_transform_queue+0x97/0x110
> [ 2.352232][ T9] ? __jump_label_update+0x37e/0x3a0
> [ 2.352232][ T9] arch_jump_label_transform_apply+0x1c/0x30
> [ 2.352232][ T9] static_key_disable_cpuslocked+0xc5/0x1b0
> [ 2.352232][ T9] static_key_disable+0x1a/0x20
> [ 2.352232][ T9] once_deferred+0x6f/0xb0
> [ 2.352232][ T9] ? process_scheduled_works+0x9ef/0x17b0
> [ 2.352232][ T9] process_scheduled_works+0xade/0x17b0
> [ 2.352232][ T9] ? __pfx_process_scheduled_works+0x10/0x10
> [ 2.352232][ T9] worker_thread+0x8a0/0xda0
> [ 2.352232][ T9] kthread+0x70e/0x8a0
> [ 2.352232][ T9] ? __pfx_worker_thread+0x10/0x10
> [ 2.352232][ T9] ? __pfx_kthread+0x10/0x10
> [ 2.352232][ T9] ? __pfx_kthread+0x10/0x10
> [ 2.352232][ T9] ? _raw_spin_unlock_irq+0x23/0x50
> [ 2.352232][ T9] ? lockdep_hardirqs_on+0x9c/0x150
> [ 2.352232][ T9] ? __pfx_kthread+0x10/0x10
> [ 2.352232][ T9] ret_from_fork+0x4b/0x80
> [ 2.352232][ T9] ? __pfx_kthread+0x10/0x10
> [ 2.352232][ T9] ret_from_fork_asm+0x1a/0x30
> [ 2.352232][ T9] </TASK>
> [ 2.352232][ T9] Rebooting in 86400 seconds..
>
>
> syzkaller build log:
> go env (err=<nil>)
> GO111MODULE='auto'
> GOARCH='amd64'
> GOBIN=''
> GOCACHE='/syzkaller/.cache/go-build'
> GOENV='/syzkaller/.config/go/env'
> GOEXE=''
> GOEXPERIMENT=''
> GOFLAGS=''
> GOHOSTARCH='amd64'
> GOHOSTOS='linux'
> GOINSECURE=''
> GOMODCACHE='/syzkaller/jobs-2/linux/gopath/pkg/mod'
> GONOPROXY=''
> GONOSUMDB=''
> GOOS='linux'
> GOPATH='/syzkaller/jobs-2/linux/gopath'
> GOPRIVATE=''
> GOPROXY='https://proxy.golang.org,direct'
> GOROOT='/syzkaller/jobs-2/linux/gopath/pkg/mod/golang.org/toolchain@...0.1-go1.23.7.linux-amd64'
> GOSUMDB='sum.golang.org'
> GOTMPDIR=''
> GOTOOLCHAIN='auto'
> GOTOOLDIR='/syzkaller/jobs-2/linux/gopath/pkg/mod/golang.org/toolchain@...0.1-go1.23.7.linux-amd64/pkg/tool/linux_amd64'
> GOVCS=''
> GOVERSION='go1.23.7'
> GODEBUG=''
> GOTELEMETRY='local'
> GOTELEMETRYDIR='/syzkaller/.config/go/telemetry'
> GCCGO='gccgo'
> GOAMD64='v1'
> AR='ar'
> CC='gcc'
> CXX='g++'
> CGO_ENABLED='1'
> GOMOD='/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.mod'
> GOWORK=''
> CGO_CFLAGS='-O2 -g'
> CGO_CPPFLAGS=''
> CGO_CXXFLAGS='-O2 -g'
> CGO_FFLAGS='-O2 -g'
> CGO_LDFLAGS='-O2 -g'
> PKG_CONFIG='pkg-config'
> GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build1284445660=/tmp/go-build -gno-record-gcc-switches'
>
> git status (err=<nil>)
> HEAD detached at 0bd6db4180
> 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/contributing.md#using-syz-env
> go list -f '{{.Stale}}' ./sys/syz-sysgen | grep -q false || go install ./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/contributing.md#using-syz-env
> bin/syz-sysgen
> touch .descriptions
> GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=0bd6db418098e2d98a2edf948b41410d3d9f9e70 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20250411-130225'" -o ./bin/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 -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -std=c++17 -I. -Iexecutor/_include -DGOOS_linux=1 -DGOARCH_amd64=1 \
> -DHOSTGOOS_linux=1 -DGIT_REVISION=\"0bd6db418098e2d98a2edf948b41410d3d9f9e70\"
> /usr/bin/ld: /tmp/ccP81Mp7.o: in function `Connection::Connect(char const*, char const*)':
> executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x104): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
>
>
> Error text is too large and was truncated, full error text is at:
> https://syzkaller.appspot.com/x/error.txt?x=11a9f368580000
>
>
> Tested on:
>
> commit: 33035b66 Add linux-next specific files for 20250428
> git tree: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
> kernel config: https://syzkaller.appspot.com/x/.config?x=5748169cc3be99bc
> dashboard link: https://syzkaller.appspot.com/bug?extid=8bb6fd945af4e0ad9299
> compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2
> patch: https://syzkaller.appspot.com/x/patch.diff?x=1292d774580000
>
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