rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 GPs behind) idle=6074/1/0x4000000000000000 softirq=21305/21307 fqs=0
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5829/1:b..l P7494/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=20381, q=126 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 7496 Comm: syz.2.446 Not tainted 6.14.0-syzkaller-10514-g7f2ff7b62617 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:-1 [inline]
RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:239 [inline]
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline]
RIP: 0010:hlock_class kernel/locking/lockdep.c:233 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4855 [inline]
RIP: 0010:__lock_acquire+0x2fe/0xd80 kernel/locking/lockdep.c:5185
Code: fb 44 09 d3 09 f3 09 d3 41 89 5c cd 20 4c 8d 24 cd 20 00 00 00 4d 01 ec 48 89 4c 24 28 45 89 5c cd 24 48 0f a3 05 32 04 cc 12 <4c> 89 ee 4c 89 6c 24 08 73 13 48 69 c0 c8 00 00 00 48 8d 80 c0 de
RSP: 0018:ffffc90000007b80 EFLAGS: 00000083
RAX: 000000000000006c RBX: 00000000000c406c RCX: 0000000000000000
RDX: 000000000000406c RSI: 0000000000040000 RDI: 0000000000080000
RBP: ffff8880259fbc00 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880259fc710
R13: ffff8880259fc6f0 R14: 0000000000000000 R15: ffff8880b86276d8
FS: 00007fc4ccb2c6c0(0000) GS:ffff888124fed000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f65ffff CR3: 000000002e6b8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866
__raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
_raw_spin_lock_irq+0xd3/0x120 kernel/locking/spinlock.c:170
__run_hrtimer kernel/time/hrtimer.c:1795 [inline]
__hrtimer_run_queues+0x67b/0xd40 kernel/time/hrtimer.c:1855
hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1917
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:generic_exec_single+0x50d/0x990 arch/x86/include/asm/irqflags.h:-1
Code: e8 48 23 0c 00 90 0f 0b 90 e9 6b fe ff ff e8 3a 23 0c 00 e8 e5 98 6d 0a 4d 85 e4 0f 84 50 ff ff ff e8 27 23 0c 00 fb 45 31 f6 <48> 8b 44 24 10 48 c7 44 24 20 0e 36 e0 45 49 c7 04 07 00 00 00 00
RSP: 0018:ffffc9000347f960 EFLAGS: 00000246
RAX: ffffffff81b73729 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9000cdc4000 RSI: 0000000000009912 RDI: 0000000000009913
RBP: ffffc9000347fa38 R08: ffffffff81b7365d R09: 1ffffffff20bbfce
R10: dffffc0000000000 R11: fffffbfff20bbfcf R12: 0000000000000200
R13: ffffffff93633020 R14: 0000000000000000 R15: dffffc0000000000
smp_call_function_single_async+0x83/0x110 kernel/smp.c:724
rdmsr_safe_on_cpu+0x174/0x360 arch/x86/lib/msr-smp.c:179
msr_read+0x1a7/0x270 arch/x86/kernel/msr.c:66
vfs_read+0x21f/0xb90 fs/read_write.c:568
ksys_read+0x19d/0x2d0 fs/read_write.c:713
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc4cbd8d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc4ccb2c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fc4cbfa5fa0 RCX: 00007fc4cbd8d169
RDX: 0000000000018ff8 RSI: 0000200000019680 RDI: 0000000000000005
RBP: 00007fc4cbe0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc4cbfa5fa0 R15: 00007ffee711f6f8
task:syz.4.445 state:R running task stack:21568 pid:7494 tgid:7493 ppid:5825 task_flags:0x40054c flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b33/0x51f0 kernel/sched/core.c:6767
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6947
preempt_schedule+0xe4/0xf0 kernel/sched/core.c:6971
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
zap_pte_range mm/memory.c:1771 [inline]
zap_pmd_range mm/memory.c:1833 [inline]
zap_pud_range mm/memory.c:1862 [inline]
zap_p4d_range mm/memory.c:1883 [inline]
unmap_page_range+0x3a12/0x4520 mm/memory.c:1904
unmap_vmas+0x3ce/0x5f0 mm/memory.c:1994
exit_mmap+0x2bc/0xdd0 mm/mmap.c:1284
__mmput+0x115/0x410 kernel/fork.c:1356
exit_mm+0x221/0x310 kernel/exit.c:586
do_exit+0x994/0x2950 kernel/exit.c:941
do_group_exit+0x207/0x2c0 kernel/exit.c:1103
get_signal+0x1696/0x1730 kernel/signal.c:3035
arch_do_signal_or_restart+0x98/0x840 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xce/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f451918d169
RSP: 002b:00007f451a027038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: 000000000000005c RBX: 00007f45193a5fa0 RCX: 00007f451918d169
RDX: 0000000000008000 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007f451920e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f45193a5fa0 R15: 00007ffc4154daf8
task:syz-executor state:R running task stack:20840 pid:5829 tgid:5829 ppid:5819 task_flags:0x400140 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b33/0x51f0 kernel/sched/core.c:6767
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6947
preempt_schedule+0xe4/0xf0 kernel/sched/core.c:6971
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
copy_pte_range mm/memory.c:1200 [inline]
copy_pmd_range+0x6dde/0x77b0 mm/memory.c:1261
copy_pud_range mm/memory.c:1298 [inline]
copy_p4d_range mm/memory.c:1322 [inline]
copy_page_range+0x9a1/0xe90 mm/memory.c:1420
dup_mmap kernel/fork.c:748 [inline]
dup_mm kernel/fork.c:1700 [inline]
copy_mm+0x1279/0x2170 kernel/fork.c:1752
copy_process+0x17de/0x3d10 kernel/fork.c:2395
kernel_clone+0x227/0x880 kernel/fork.c:2810
__do_sys_clone kernel/fork.c:2953 [inline]
__se_sys_clone kernel/fork.c:2937 [inline]
__x64_sys_clone+0x268/0x2e0 kernel/fork.c:2937
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3e931839d3
RSP: 002b:00007ffc355ad028 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3e931839d3
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 000055555582e7d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000927c0 R14: 0000000000042572 R15: 00007ffc355ad1c0
rcu: rcu_preempt kthread starved for 10502 jiffies! g20381 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:26688 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b33/0x51f0 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
schedule_timeout+0x15b/0x2b0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x2e1/0x1340 kernel/rcu/tree.c:2046
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2248
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 7499 Comm: syz.2.446 Not tainted 6.14.0-syzkaller-10514-g7f2ff7b62617 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x1bb6/0x2d40 kernel/smp.c:885
Code: 89 e6 83 e6 01 31 ff e8 48 02 0c 00 41 83 e4 01 4c 8b 64 24 68 75 07 e8 f8 fd 0b 00 eb 41 f3 90 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 03 84 c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 d3 fd 0b
RSP: 0018:ffffc9000344fa40 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 1ffff110170c81e5 RCX: 0000000000080000
RDX: ffffc9000e5ca000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc9000344fc30 R08: ffffffff81b75c48 R09: 1ffffffff20bbfce
R10: dffffc0000000000 R11: ffffffff816b6a60 R12: ffff8880b873ab88
R13: ffff8880b8640f28 R14: ffff8880b873ab80 R15: 0000000000000000
FS: 00007fc4ccb0b6c0(0000) GS:ffff8881250ed000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000003c80 CR3: 000000002e6b8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
clock_was_set+0x766/0x820 kernel/time/hrtimer.c:978
do_settimeofday64+0x39e/0x650 kernel/time/timekeeping.c:1395
__do_sys_clock_settime kernel/time/posix-timers.c:1140 [inline]
__se_sys_clock_settime kernel/time/posix-timers.c:1124 [inline]
__x64_sys_clock_settime+0x240/0x280 kernel/time/posix-timers.c:1124
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc4cbd8d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc4ccb0b038 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3
RAX: ffffffffffffffda RBX: 00007fc4cbfa6080 RCX: 00007fc4cbd8d169
RDX: 0000000000000000 RSI: 0000200000003c80 RDI: 0000000000000000
RBP: 00007fc4cbe0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc4cbfa6080 R15: 00007ffee711f6f8