rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...0: (1 GPs behind) idle=1f5/1/0x4000000000000000 softirq=53993/53994 fqs=2699
(detected by 0, t=10502 jiffies, g=72381, q=1006)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 13978 Comm: syz.1.2938 Not tainted 5.15.164-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:hlock_class kernel/locking/lockdep.c:197 [inline]
RIP: 0010:__lock_acquire+0x1211/0x1ff0 kernel/locking/lockdep.c:5009
Code: 00 00 41 8b 1f 81 e3 ff 1f 00 00 89 d8 c1 e8 06 48 8d 3c c5 c0 00 c7 8f be 08 00 00 00 e8 57 72 67 00 48 0f a3 1d 3f 3c 64 0e <73> 1b 48 8d 04 5b 48 c1 e0 06 48 8d 98 c0 5f 96 8f 48 ba 00 00 00
RSP: 0018:ffffc90000dd0a60 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000015 RCX: ffffffff8162c479
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8fc700c0
RBP: 9be2421a50ef4013 R08: dffffc0000000000 R09: fffffbfff1f8e019
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff888022a9a8a8 R14: ffff888022a99dc0 R15: ffff888022a9a8d0
FS: 00007f2c6c7a56c0(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000040 CR3: 0000000065373000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:312
rcu_read_lock include/linux/rcupdate.h:739 [inline]
advance_sched+0x6ce/0x940 net/sched/sch_taprio.c:769
__run_hrtimer kernel/time/hrtimer.c:1686 [inline]
__hrtimer_run_queues+0x598/0xcf0 kernel/time/hrtimer.c:1750
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
__sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:lock_is_held_type+0x137/0x180
Code: 75 40 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 46 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 04 25 28 00 00 00 <48> 3b 44 24 08 75 3c 89 e8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc900036c7438 EFLAGS: 00000206
RAX: dba729d58e72e300 RBX: dffffc0000000000 RCX: ffff888022a99dc0
RDX: 0000000000000000 RSI: ffffffff8a8b3ca0 RDI: ffffffff8ad8f800
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffc900036c7660
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000246
R13: ffff888022a99dc0 R14: 00000000ffffffff R15: ffffffff8c91faa0
lock_is_held include/linux/lockdep.h:287 [inline]
___might_sleep+0xf1/0x6a0 kernel/sched/core.c:9592
__mutex_lock_common+0xd4/0x25a0 kernel/locking/mutex.c:573
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
__unix_dgram_recvmsg+0x24d/0x1260 net/unix/af_unix.c:2308
____sys_recvmsg+0x286/0x530
___sys_recvmsg+0x1ec/0x690 net/socket.c:2692
do_recvmmsg+0x36f/0x8f0 net/socket.c:2786
__sys_recvmmsg net/socket.c:2865 [inline]
__do_sys_recvmmsg net/socket.c:2888 [inline]
__se_sys_recvmmsg net/socket.c:2881 [inline]
__x64_sys_recvmmsg+0x195/0x240 net/socket.c:2881
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f2c6e347299
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:00007f2c6c7a5048 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f2c6e4d6058 RCX: 00007f2c6e347299
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000007
RBP: 00007f2c6e3b48e6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f2c6e4d6058 R15: 00007ffee7ffc818
rcu: rcu_preempt kthread starved for 5069 jiffies! g72381 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:25976 pid: 15 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
schedule+0x11b/0x1f0 kernel/sched/core.c:6459
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1914
rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972
rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0
CPU: 0 PID: 154 Comm: kworker/u4:2 Not tainted 5.15.164-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
rcu_check_gp_kthread_starvation+0x1d2/0x240 kernel/rcu/tree_stall.h:487
print_other_cpu_stall+0x137a/0x14d0 kernel/rcu/tree_stall.h:592
check_cpu_stall kernel/rcu/tree_stall.h:745 [inline]
rcu_pending kernel/rcu/tree.c:3932 [inline]
rcu_sched_clock_irq+0xa38/0x1150 kernel/rcu/tree.c:2619
update_process_times+0x196/0x200 kernel/time/timer.c:1818
tick_sched_handle kernel/time/tick-sched.c:254 [inline]
tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1473
__run_hrtimer kernel/time/hrtimer.c:1686 [inline]
__hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1750
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
__sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__sanitizer_cov_trace_pc+0x58/0x60 kernel/kcov.c:207
Code: 10 16 00 00 83 fa 02 75 21 48 8b 91 18 16 00 00 48 8b 32 48 8d 7e 01 8b 89 14 16 00 00 48 39 cf 73 08 48 89 44 f2 08 48 89 3a 0f 1f 80 00 00 00 00 4c 8b 04 24 65 48 8b 15 f4 0d 82 7e 65 8b
RSP: 0018:ffffc900020364f8 EFLAGS: 00000293
RAX: ffffffff81749574 RBX: 1ffff110173680b9 RCX: ffff888016fe1dc0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90002036640 R08: ffffffff81749544 R09: ffffed1017367681
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001
R13: ffff8880b9b405c8 R14: ffff8880b9a3b3c0 R15: 0000000000000001
csd_lock_wait kernel/smp.c:440 [inline]
smp_call_function_many_cond+0xab4/0xd90 kernel/smp.c:969
on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1135
__flush_tlb_multi arch/x86/include/asm/paravirt.h:87 [inline]
flush_tlb_multi arch/x86/mm/tlb.c:900 [inline]
flush_tlb_mm_range+0x2a5/0x4a0 arch/x86/mm/tlb.c:986
flush_tlb_page arch/x86/include/asm/tlbflush.h:239 [inline]
ptep_clear_flush+0x112/0x150 mm/pgtable-generic.c:97
page_mkclean_one+0x428/0x7b0 mm/rmap.c:938
rmap_walk_file+0x3f8/0x600 mm/rmap.c:2378
rmap_walk mm/rmap.c:2396 [inline]
page_mkclean+0x330/0x490 mm/rmap.c:1006
clear_page_dirty_for_io+0x3ce/0xa60 mm/page-writeback.c:2749
mpage_submit_page+0x90/0x230 fs/ext4/inode.c:2081
mpage_process_page_bufs+0x6c8/0x8b0 fs/ext4/inode.c:2215
mpage_prepare_extent_to_map+0xc9d/0x1150 fs/ext4/inode.c:2643
ext4_writepages+0xcd0/0x3d10 fs/ext4/inode.c:2771
do_writepages+0x481/0x730 mm/page-writeback.c:2386
__writeback_single_inode+0x15b/0xe30 fs/fs-writeback.c:1647
writeback_sb_inodes+0xbce/0x1a40 fs/fs-writeback.c:1930
__writeback_inodes_wb+0x114/0x400 fs/fs-writeback.c:2001
wb_writeback+0x465/0xc50 fs/fs-writeback.c:2106
wb_check_start_all fs/fs-writeback.c:2228 [inline]
wb_do_writeback fs/fs-writeback.c:2254 [inline]
wb_workfn+0x9f4/0x1130 fs/fs-writeback.c:2288
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287