linux-kernel - Re: [syzbot] [mm?] WARNING in move_to_new

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Message-ID: <30fb5c18-932d-4270-88c7-4180083b9652@amd.com>
Date: Wed, 30 Apr 2025 14:36:15 +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

The issue is due to e7021e2fe0 as described below:
https://lore.kernel.org/all/SJ1PR11MB6129E62E3B372932C6B7477FB9BD2@SJ1PR11MB6129.namprd11.prod.outlook.com/

Trying again after reverting all commits of this patch-series:

#syz test: https://github.com/shivankgarg98/linux.git 69a58d5260

On 4/30/2025 1:53 PM, syzbot wrote:
> Hello,
> 
> syzbot tried to test the proposed patch but the build/boot failed:
> 
> 	Tracing variant of Tasks RCU enabled.
> [    1.756197][    T0] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
> [    1.757347][    T0] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
> [    1.758601][    T0] Running RCU synchronous self tests
> [    1.759703][    T0] RCU Tasks: Setting shift to 1 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=2.
> [    1.761088][    T0] RCU Tasks Trace: Setting shift to 1 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=2.
> [    1.898957][    T0] NR_IRQS: 4352, nr_irqs: 440, preallocated irqs: 16
> [    1.901185][    T0] rcu: srcu_init: Setting srcu_struct sizes based on contention.
> [    1.902806][    T0] kfence: initialized - using 2097152 bytes for 255 objects at 0xffff88823be00000-0xffff88823c000000
> [    1.905828][    T0] Console: colour VGA+ 80x25
> [    1.906677][    T0] printk: legacy console [ttyS0] enabled
> [    1.906677][    T0] printk: legacy console [ttyS0] enabled
> [    1.908615][    T0] printk: legacy bootconsole [earlyser0] disabled
> [    1.908615][    T0] printk: legacy bootconsole [earlyser0] disabled
> [    1.910441][    T0] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
> [    1.911593][    T0] ... MAX_LOCKDEP_SUBCLASSES:  8
> [    1.912289][    T0] ... MAX_LOCK_DEPTH:          48
> [    1.913471][    T0] ... MAX_LOCKDEP_KEYS:        8192
> [    1.914174][    T0] ... CLASSHASH_SIZE:          4096
> [    1.914891][    T0] ... MAX_LOCKDEP_ENTRIES:     1048576
> [    1.915648][    T0] ... MAX_LOCKDEP_CHAINS:      1048576
> [    1.916465][    T0] ... CHAINHASH_SIZE:          524288
> [    1.917206][    T0]  memory used by lock dependency info: 106625 kB
> [    1.918060][    T0]  memory used for stack traces: 8320 kB
> [    1.919051][    T0]  per task-struct memory footprint: 1920 bytes
> [    1.920079][    T0] mempolicy: Enabling automatic NUMA balancing. Configure with numa_balancing= or the kernel.numa_balancing sysctl
> [    1.921730][    T0] ACPI: Core revision 20241212
> [    1.923482][    T0] APIC: Switch to symmetric I/O mode setup
> [    1.924904][    T0] x2apic enabled
> [    1.929239][    T0] APIC: Switched APIC routing to: physical x2apic
> [    1.936346][    T0] ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1
> [    1.937802][    T0] clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x1fb702bab20, max_idle_ns: 440795313305 ns
> [    1.939405][    T0] Calibrating delay loop (skipped) preset value.. 4400.44 BogoMIPS (lpj=22002200)
> [    1.941337][    T0] Last level iTLB entries: 4KB 64, 2MB 8, 4MB 8
> [    1.942346][    T0] Last level dTLB entries: 4KB 64, 2MB 32, 4MB 32, 1GB 4
> [    1.949489][    T0] Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
> [    1.951078][    T0] Spectre V2 : Spectre BHI mitigation: SW BHB clearing on syscall and VM exit
> [    1.952604][    T0] Spectre V2 : Mitigation: IBRS
> [    1.953272][    T0] Spectre V2 : Spectre v2 / SpectreRSB: Filling RSB on context switch and VMEXIT
> [    1.954494][    T0] RETBleed: Mitigation: IBRS
> [    1.955293][    T0] Spectre V2 : mitigation: Enabling conditional Indirect Branch Prediction Barrier
> [    1.956658][    T0] Spectre V2 : User space: Mitigation: STIBP via prctl
> [    1.957718][    T0] Speculative Store Bypass: Mitigation: Speculative Store Bypass disabled via prctl
> [    1.959430][    T0] MDS: Mitigation: Clear CPU buffers
> [    1.960142][    T0] TAA: Mitigation: Clear CPU buffers
> [    1.960948][    T0] MMIO Stale Data: Vulnerable: Clear CPU buffers attempted, no microcode
> [    1.962237][    T0] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
> [    1.963444][    T0] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
> [    1.964804][    T0] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
> [    1.965948][    T0] x86/fpu: xstate_offset[2]:  576, xstate_sizes[2]:  256
> [    1.966996][    T0] x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format.
> [    2.270147][    T0] Freeing SMP alternatives memory: 132K
> [    2.271177][    T0] pid_max: default: 32768 minimum: 301
> [    2.272608][    T0] LSM: initializing lsm=lockdown,capability,landlock,yama,safesetid,tomoyo,apparmor,bpf,ima,evm
> [    2.274518][    T0] landlock: Up and running.
> [    2.275138][    T0] Yama: becoming mindful.
> [    2.276037][    T0] TOMOYO Linux initialized
> [    2.277498][    T0] AppArmor: AppArmor initialized
> [    2.279855][    T0] LSM support for eBPF active
> [    2.286597][    T0] Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes, vmalloc hugepage)
> [    2.291139][    T0] Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes, vmalloc hugepage)
> [    2.293046][    T0] Mount-cache hash table entries: 16384 (order: 5, 131072 bytes, vmalloc)
> [    2.294572][    T0] Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes, vmalloc)
> [    2.301308][    T0] Running RCU synchronous self tests
> [    2.302327][    T0] Running RCU synchronous self tests
> [    2.424383][    T1] smpboot: CPU0: Intel(R) Xeon(R) CPU @ 2.20GHz (family: 0x6, model: 0x4f, stepping: 0x0)
> [    2.428981][    T9] ------------[ cut here ]------------
> [    2.429388][    T9] WARNING: CPU: 0 PID: 9 at arch/x86/mm/tlb.c:919 switch_mm_irqs_off+0x640/0x7c0
> [    2.429388][    T9] Modules linked in:
> [    2.429388][    T9] CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted 6.15.0-rc4-next-20250428-syzkaller-00003-g5d98b45ab9df #0 PREEMPT(full) 
> [    2.429388][    T9] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
> [    2.429388][    T9] Workqueue: events once_deferred
> [    2.429388][    T9] RIP: 0010:switch_mm_irqs_off+0x640/0x7c0
> [    2.429388][    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
> [    2.429388][    T9] RSP: 0000:ffffc900000e7720 EFLAGS: 00010056
> [    2.429388][    T9] RAX: 0000000000000001 RBX: ffff88801a070940 RCX: ffffffff8173b01d
> [    2.429388][    T9] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88801a070940
> [    2.429388][    T9] RBP: ffffc900000e77f0 R08: ffff88801a070947 R09: 1ffff1100340e128
> [    2.429388][    T9] R10: dffffc0000000000 R11: ffffed100340e129 R12: 1ffff110037d70ab
> [    2.429388][    T9] R13: ffffffff8e0467c0 R14: ffff88801beb8000 R15: 0000000000000000
> [    2.429388][    T9] FS:  0000000000000000(0000) GS:ffff8881260a1000(0000) knlGS:0000000000000000
> [    2.429388][    T9] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [    2.429388][    T9] CR2: ffff88823ffff000 CR3: 000000001a078000 CR4: 00000000003506f0
> [    2.429388][    T9] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [    2.429388][    T9] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> [    2.429388][    T9] Call Trace:
> [    2.429388][    T9]  <TASK>
> [    2.429388][    T9]  ? __pfx_switch_mm_irqs_off+0x10/0x10
> [    2.429388][    T9]  ? __text_poke+0x5a4/0x980
> [    2.429388][    T9]  ? kasan_check_range+0x29a/0x2b0
> [    2.429388][    T9]  ? serial8250_isa_init_ports+0x63/0xf0
> [    2.429388][    T9]  unuse_temporary_mm+0x9d/0x100
> [    2.429388][    T9]  __text_poke+0x634/0x980
> [    2.429388][    T9]  ? serial8250_isa_init_ports+0x63/0xf0
> [    2.429388][    T9]  ? __pfx_text_poke_memcpy+0x10/0x10
> [    2.429388][    T9]  ? __pfx___text_poke+0x10/0x10
> [    2.429388][    T9]  ? rcu_is_watching+0x15/0xb0
> [    2.429388][    T9]  ? trace_contention_end+0x39/0x120
> [    2.429388][    T9]  smp_text_poke_batch_finish+0x38c/0x1100
> [    2.429388][    T9]  ? __pfx___mutex_lock+0x10/0x10
> [    2.429388][    T9]  ? __pfx_smp_text_poke_batch_finish+0x10/0x10
> [    2.429388][    T9]  ? arch_jump_label_transform_queue+0x97/0x110
> [    2.429388][    T9]  ? __jump_label_update+0x37e/0x3a0
> [    2.429388][    T9]  arch_jump_label_transform_apply+0x1c/0x30
> [    2.429388][    T9]  static_key_disable_cpuslocked+0xc5/0x1b0
> [    2.429388][    T9]  static_key_disable+0x1a/0x20
> [    2.429388][    T9]  once_deferred+0x6f/0xb0
> [    2.429388][    T9]  ? process_scheduled_works+0x9ef/0x17b0
> [    2.429388][    T9]  process_scheduled_works+0xade/0x17b0
> [    2.429388][    T9]  ? __pfx_process_scheduled_works+0x10/0x10
> [    2.429388][    T9]  worker_thread+0x8a0/0xda0
> [    2.429388][    T9]  kthread+0x70e/0x8a0
> [    2.429388][    T9]  ? __pfx_worker_thread+0x10/0x10
> [    2.429388][    T9]  ? __pfx_kthread+0x10/0x10
> [    2.429388][    T9]  ? __pfx_kthread+0x10/0x10
> [    2.429388][    T9]  ? _raw_spin_unlock_irq+0x23/0x50
> [    2.429388][    T9]  ? lockdep_hardirqs_on+0x9c/0x150
> [    2.429388][    T9]  ? __pfx_kthread+0x10/0x10
> [    2.429388][    T9]  ret_from_fork+0x4b/0x80
> [    2.429388][    T9]  ? __pfx_kthread+0x10/0x10
> [    2.429388][    T9]  ret_from_fork_asm+0x1a/0x30
> [    2.429388][    T9]  </TASK>
> [    2.429388][    T9] Kernel panic - not syncing: kernel: panic_on_warn set ...
> [    2.429388][    T9] CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted 6.15.0-rc4-next-20250428-syzkaller-00003-g5d98b45ab9df #0 PREEMPT(full) 
> [    2.429388][    T9] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
> [    2.429388][    T9] Workqueue: events once_deferred
> [    2.429388][    T9] Call Trace:
> [    2.429388][    T9]  <TASK>
> [    2.429388][    T9]  dump_stack_lvl+0x99/0x250
> [    2.429388][    T9]  ? __asan_memcpy+0x40/0x70
> [    2.429388][    T9]  ? __pfx_dump_stack_lvl+0x10/0x10
> [    2.429388][    T9]  ? __pfx__printk+0x10/0x10
> [    2.429388][    T9]  panic+0x2db/0x790
> [    2.429388][    T9]  ? __pfx_panic+0x10/0x10
> [    2.429388][    T9]  ? show_trace_log_lvl+0x4fb/0x550
> [    2.429388][    T9]  ? ret_from_fork_asm+0x1a/0x30
> [    2.429388][    T9]  __warn+0x31b/0x4b0
> [    2.429388][    T9]  ? switch_mm_irqs_off+0x640/0x7c0
> [    2.429388][    T9]  ? switch_mm_irqs_off+0x640/0x7c0
> [    2.429388][    T9]  report_bug+0x2be/0x4f0
> [    2.429388][    T9]  ? switch_mm_irqs_off+0x640/0x7c0
> [    2.429388][    T9]  ? switch_mm_irqs_off+0x640/0x7c0
> [    2.429388][    T9]  ? switch_mm_irqs_off+0x642/0x7c0
> [    2.429388][    T9]  handle_bug+0x84/0x160
> [    2.429388][    T9]  exc_invalid_op+0x1a/0x50
> [    2.429388][    T9]  asm_exc_invalid_op+0x1a/0x20
> [    2.429388][    T9] RIP: 0010:switch_mm_irqs_off+0x640/0x7c0
> [    2.429388][    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
> [    2.429388][    T9] RSP: 0000:ffffc900000e7720 EFLAGS: 00010056
> [    2.429388][    T9] RAX: 0000000000000001 RBX: ffff88801a070940 RCX: ffffffff8173b01d
> [    2.429388][    T9] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88801a070940
> [    2.429388][    T9] RBP: ffffc900000e77f0 R08: ffff88801a070947 R09: 1ffff1100340e128
> [    2.429388][    T9] R10: dffffc0000000000 R11: ffffed100340e129 R12: 1ffff110037d70ab
> [    2.429388][    T9] R13: ffffffff8e0467c0 R14: ffff88801beb8000 R15: 0000000000000000
> [    2.429388][    T9]  ? switch_mm_irqs_off+0x21d/0x7c0
> [    2.429388][    T9]  ? __pfx_switch_mm_irqs_off+0x10/0x10
> [    2.429388][    T9]  ? __text_poke+0x5a4/0x980
> [    2.429388][    T9]  ? kasan_check_range+0x29a/0x2b0
> [    2.429388][    T9]  ? serial8250_isa_init_ports+0x63/0xf0
> [    2.429388][    T9]  unuse_temporary_mm+0x9d/0x100
> [    2.429388][    T9]  __text_poke+0x634/0x980
> [    2.429388][    T9]  ? serial8250_isa_init_ports+0x63/0xf0
> [    2.429388][    T9]  ? __pfx_text_poke_memcpy+0x10/0x10
> [    2.429388][    T9]  ? __pfx___text_poke+0x10/0x10
> [    2.429388][    T9]  ? rcu_is_watching+0x15/0xb0
> [    2.429388][    T9]  ? trace_contention_end+0x39/0x120
> [    2.429388][    T9]  smp_text_poke_batch_finish+0x38c/0x1100
> [    2.429388][    T9]  ? __pfx___mutex_lock+0x10/0x10
> [    2.429388][    T9]  ? __pfx_smp_text_poke_batch_finish+0x10/0x10
> [    2.429388][    T9]  ? arch_jump_label_transform_queue+0x97/0x110
> [    2.429388][    T9]  ? __jump_label_update+0x37e/0x3a0
> [    2.429388][    T9]  arch_jump_label_transform_apply+0x1c/0x30
> [    2.429388][    T9]  static_key_disable_cpuslocked+0xc5/0x1b0
> [    2.429388][    T9]  static_key_disable+0x1a/0x20
> [    2.429388][    T9]  once_deferred+0x6f/0xb0
> [    2.429388][    T9]  ? process_scheduled_works+0x9ef/0x17b0
> [    2.429388][    T9]  process_scheduled_works+0xade/0x17b0
> [    2.429388][    T9]  ? __pfx_process_scheduled_works+0x10/0x10
> [    2.429388][    T9]  worker_thread+0x8a0/0xda0
> [    2.429388][    T9]  kthread+0x70e/0x8a0
> [    2.429388][    T9]  ? __pfx_worker_thread+0x10/0x10
> [    2.429388][    T9]  ? __pfx_kthread+0x10/0x10
> [    2.429388][    T9]  ? __pfx_kthread+0x10/0x10
> [    2.429388][    T9]  ? _raw_spin_unlock_irq+0x23/0x50
> [    2.429388][    T9]  ? lockdep_hardirqs_on+0x9c/0x150
> [    2.429388][    T9]  ? __pfx_kthread+0x10/0x10
> [    2.429388][    T9]  ret_from_fork+0x4b/0x80
> [    2.429388][    T9]  ? __pfx_kthread+0x10/0x10
> [    2.429388][    T9]  ret_from_fork_asm+0x1a/0x30
> [    2.429388][    T9]  </TASK>
> [    2.429388][    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-build1460608260=/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/ccRsxVxg.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=11c3d774580000
> 
> 
> Tested on:
> 
> commit:         5d98b45a Revert "x86/efi: Make efi_enter/leave_mm() us..
> git tree:       https://github.com/shivankgarg98/linux.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
> 
> Note: no patches were applied.