rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (10499 ticks this GP) idle=aabc/1/0x4000000000000000 softirq=147165/147165 fqs=1
rcu: (t=10500 jiffies g=138109 q=26 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10497 jiffies! g138109 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=102488
rcu: rcu_preempt kthread starved for 10498 jiffies! g138109 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:25824 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x184f/0x4c30 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6782
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2615
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 25675 Comm: syz.3.4607 Not tainted 6.12.0-rc6-syzkaller-00225-g50643bbc9eb6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:hlock_class kernel/locking/lockdep.c:223 [inline]
RIP: 0010:__lock_acquire+0x1282/0x2050 kernel/locking/lockdep.c:5199
Code: 8e 00 48 bf 00 00 00 00 00 fc ff df 48 83 3b 00 0f 84 6e 04 00 00 41 0f b6 04 3e 84 c0 0f 85 15 0a 00 00 48 8b 44 24 10 8b 18 <81> e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 00 d8 2c 94 be
RSP: 0018:ffffc90000a18a30 EFLAGS: 00000046
RAX: ffff88802bd14700 RBX: 00000000000c4f98 RCX: 0000000003ea213d
RDX: 00000000332e2962 RSI: 0000000021a986a5 RDI: dffffc0000000000
RBP: 872d7668a34801e5 R08: ffffffff942cd9f7 R09: 1ffffffff2859b3e
R10: dffffc0000000000 R11: fffffbfff2859b3f R12: 0000000000000001
R13: ffff88802bd146d8 R14: 1ffff110057a28e0 R15: ffff88802bd14700
FS: 00007fd5272576c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020003c80 CR3: 000000005cb90000 CR4: 0000000000350ef0
Call Trace:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
advance_sched+0xab/0xca0 net/sched/sch_taprio.c:924
__run_hrtimer kernel/time/hrtimer.c:1691 [inline]
__hrtimer_run_queues+0x59d/0xd50 kernel/time/hrtimer.c:1755
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1817
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x112/0x420 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:finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5202
Code: c9 50 e8 79 00 0c 00 48 83 c4 08 4c 89 f7 e8 4d 39 00 00 0f 1f 44 00 00 4c 89 f7 e8 50 dd 6c 0a e8 0b 5a 38 00 fb 48 8b 5d c0 <48> 8d bb f8 15 00 00 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc
RSP: 0018:ffffc9000b3871c8 EFLAGS: 00000282
RAX: 3bac755dad080400 RBX: ffff88802bd13c00 RCX: ffffffff9a3d4903
RDX: dffffc0000000000 RSI: ffffffff8c0acac0 RDI: ffffffff8c6109a0
RBP: ffffc9000b387210 R08: ffffffff901d09ef R09: 1ffffffff203a13d
R10: dffffc0000000000 R11: fffffbfff203a13e R12: 1ffff110170e7f14
R13: dffffc0000000000 R14: ffff8880b873ea80 R15: ffff8880b873f8a0
context_switch kernel/sched/core.c:5331 [inline]
__schedule+0x1857/0x4c30 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6782
schedule_timeout+0xb0/0x310 kernel/time/timer.c:2591
unix_wait_for_peer+0x250/0x340 net/unix/af_unix.c:1529
unix_dgram_sendmsg+0x127f/0x1f80 net/unix/af_unix.c:2131
sock_sendmsg_nosec net/socket.c:729 [inline]
__sock_sendmsg+0x223/0x270 net/socket.c:744
____sys_sendmsg+0x52a/0x7e0 net/socket.c:2607
___sys_sendmsg net/socket.c:2661 [inline]
__sys_sendmmsg+0x3ab/0x730 net/socket.c:2747
__do_sys_sendmmsg net/socket.c:2776 [inline]
__se_sys_sendmmsg net/socket.c:2773 [inline]
__x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2773
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd52637e719
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:00007fd527257038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007fd526535f80 RCX: 00007fd52637e719
RDX: 0000000000000318 RSI: 00000000200bd000 RDI: 0000000000000004
RBP: 00007fd5263f139e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd526535f80 R15: 00007ffedd9e6958
CPU: 0 UID: 0 PID: 25680 Comm: syz.3.4607 Not tainted 6.12.0-rc6-syzkaller-00225-g50643bbc9eb6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x19f8/0x2ca0 kernel/smp.c:884
Code: 89 e6 83 e6 01 31 ff e8 86 f3 0b 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 31 ef 0b 00 eb 38 f3 90 42 0f b6 04 23 <84> c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 15 ef 0b 00 eb e4 44
RSP: 0018:ffffc9000457ecc0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff110170e8919 RCX: 0000000000040000
RDX: ffffc9001c000000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc9000457eec0 R08: ffffffff8188eb1a R09: 1ffffffff2859b00
R10: dffffc0000000000 R11: fffffbfff2859b01 R12: dffffc0000000000
R13: ffff8880b87448c8 R14: ffff8880b863fc80 R15: 0000000000000001
FS: 00007fd5272366c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000203b7030 CR3: 000000005cb90000 CR4: 0000000000350ef0
Call Trace:
on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1051
__flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
flush_tlb_multi arch/x86/mm/tlb.c:938 [inline]
flush_tlb_mm_range+0x329/0x5c0 arch/x86/mm/tlb.c:1024
flush_tlb_page arch/x86/include/asm/tlbflush.h:254 [inline]
ptep_clear_flush+0x11a/0x170 mm/pgtable-generic.c:101
wp_page_copy mm/memory.c:3419 [inline]
do_wp_page+0x1beb/0x52d0 mm/memory.c:3745
handle_pte_fault+0x10e3/0x6820 mm/memory.c:5782
__handle_mm_fault mm/memory.c:5909 [inline]
handle_mm_fault+0x1106/0x1bb0 mm/memory.c:6077
do_user_addr_fault arch/x86/mm/fault.c:1389 [inline]
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x2b9/0x8c0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:__put_user_nocheck_4+0x7/0x20 arch/x86/lib/putuser.S:97
Code: d9 0f 01 cb 89 01 31 c9 0f 01 ca e9 7e f9 2b 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 01 cb <89> 01 31 c9 0f 01 ca e9 58 f9 2b 00 66 2e 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc9000457f8f8 EFLAGS: 00050202
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000203b7030
RDX: ffff88807c981e00 RSI: 0000000000000002 RDI: 00000000ffffffff
RBP: ffffc9000457fa70 R08: ffffffff898904af R09: 1ffff920008afed0
R10: dffffc0000000000 R11: fffff520008afed1 R12: 00000000203b7000
R13: 0000000000000002 R14: 0000000000000000 R15: ffffc9000457fd00
____sys_recvmsg+0x2a7/0x480 net/socket.c:2839
___sys_recvmsg net/socket.c:2868 [inline]
do_recvmmsg+0x45e/0xad0 net/socket.c:2962
__sys_recvmmsg net/socket.c:3041 [inline]
__do_sys_recvmmsg net/socket.c:3064 [inline]
__se_sys_recvmmsg net/socket.c:3057 [inline]
__x64_sys_recvmmsg+0x199/0x250 net/socket.c:3057
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd52637e719
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:00007fd527236038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007fd526536058 RCX: 00007fd52637e719
RDX: 03fffffffffffcb5 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007fd5263f139e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fd526536058 R15: 00007ffedd9e6958