rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6576/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=25189, q=618 ncpus=2)
task:syz-executor.0 state:R running task stack:27168 pid:6576 tgid:6576 ppid:5859 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7067
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:206 [inline]
RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:238 [inline]
RIP: 0010:tif_need_resched include/linux/thread_info.h:184 [inline]
RIP: 0010:need_resched include/linux/sched.h:2110 [inline]
RIP: 0010:preempt_schedule_common+0x4b/0xc0 kernel/sched/core.c:6932
Code: c3 65 ff 05 2f 97 19 75 65 8b 05 28 97 19 75 25 ff ff ff 7f 83 f8 01 74 29 bf 01 00 00 00 e8 8c 9d ff ff 65 ff 0d 0d 97 19 75 <80> 3b 00 75 5f 48 8b 45 00 a8 08 75 ca 5b 5d 41 5c 41 5d c3 cc cc
RSP: 0018:ffffc90002eefa68 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffed100f38a000 RCX: fffff520005ddf2e
RDX: 1ffff1100f38a2cb RSI: ffffffff8b2cade0 RDI: ffff888079c51658
RBP: ffff888079c50000 R08: 0000000000000000 R09: fffffbfff284d65e
R10: ffffffff9426b2f7 R11: 0000000000000002 R12: ffffffff8100a13a
R13: ffff888079c50000 R14: 00000000ffffffff R15: 0000000000000000
preempt_schedule_thunk+0x1a/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]
insert_page mm/memory.c:2034 [inline]
vm_insert_page+0x5fc/0xae0 mm/memory.c:2186
kcov_mmap+0xda/0x150 kernel/kcov.c:496
call_mmap include/linux/fs.h:2107 [inline]
mmap_region+0x757/0x2760 mm/mmap.c:2886
do_mmap+0xbc7/0xf60 mm/mmap.c:1397
vm_mmap_pgoff+0x1ba/0x360 mm/util.c:573
ksys_mmap_pgoff+0x332/0x5d0 mm/mmap.c:1443
__do_sys_mmap arch/x86/kernel/sys_x86_64.c:86 [inline]
__se_sys_mmap arch/x86/kernel/sys_x86_64.c:79 [inline]
__x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:79
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0f1fa7cfa3
RSP: 002b:00007ffe8da7c798 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f0f1fbb42a8 RCX: 00007f0f1fa7cfa3
RDX: 0000000000000003 RSI: 0000000000200000 RDI: 00007f0f1d801000
RBP: 00007f0f1d800000 R08: 00000000000000db R09: 0000000000000000
R10: 0000000000000011 R11: 0000000000000246 R12: 00007ffe8da7c928
R13: 00007ffe8da7c8d0 R14: 00007f0f1fbb4210 R15: 00007f0f1fbb421c
rcu: rcu_preempt kthread starved for 10530 jiffies! g25189 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:28128 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6837
schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2000
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2202
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 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:
CPU: 0 PID: 1142 Comm: kworker/0:1H Not tainted 6.10.0-rc2-syzkaller-00022-g32f88d65f01b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Workqueue: 0x0 (kblockd)
RIP: 0010:finish_task_switch.isra.0+0x220/0xcc0 kernel/sched/core.c:5282
Code: a9 0a 00 00 44 8b 0d 17 48 86 0e 45 85 c9 0f 85 c0 01 00 00 48 89 df e8 ae f8 ff ff e8 d9 e6 36 00 fb 65 48 8b 1d e0 89 a5 7e <48> 8d bb f8 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc90004c27b30 EFLAGS: 00000202
RAX: 00000000002aec31 RBX: ffff8880229cbc00 RCX: 1ffffffff1fc8441
RDX: 0000000000000000 RSI: ffffffff8b2cade0 RDI: ffffffff8b900000
RBP: ffffc90004c27b78 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8fe46497 R11: 0000000000000000 R12: ffff8880b923f978
R13: ffff888027b1bc00 R14: 0000000000000000 R15: ffff8880b923ec00
FS: 0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3362e000 CR3: 000000007ca46000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
context_switch kernel/sched/core.c:5411 [inline]
__schedule+0xf1d/0x5d00 kernel/sched/core.c:6745
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7067
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:preempt_count_add+0x4/0x150 kernel/sched/core.c:5873
Code: cc cc e8 2f f7 89 09 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <48> c7 c0 e0 9b b4 94 55 48 ba 00 00 00 00 00 fc ff df 48 89 c1 53
RSP: 0018:ffffc90004c27df8 EFLAGS: 00000202
RAX: 0000000000004008 RBX: ffff8880229cbc00 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff8b2cade0 RDI: 0000000000000001
RBP: ffffed1004539780 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff8fe46497 R11: 0000000000000000 R12: ffff8880229cbc2c
R13: ffff8880229cbc00 R14: ffffed10044b1688 R15: fffffbfff1b01e40
__schedule_loop kernel/sched/core.c:6821 [inline]
schedule+0xe0/0x350 kernel/sched/core.c:6837
worker_thread+0x2de/0xf70 kernel/workqueue.c:3408
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244