Re: [syzbot] [mm?] WARNING in move_to_new_folio

syzbot
2025-04-30T08:23:03Z

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@v0.0.1-go1.23.7.linux-amd64'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/syzkaller/jobs-2/linux/gopath/pkg/mod/golang.org/toolchain@v0.0.1-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.