rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (0 ticks this GP) idle=f9ac/1/0x4000000000000000 softirq=46860/46860 fqs=0
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P12959/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=40089, q=311 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 10996 Comm: syz-executor Not tainted 6.13.0-rc1-next-20241205-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:hlock_class kernel/locking/lockdep.c:228 [inline]
RIP: 0010:mark_lock+0xa2/0x360 kernel/locking/lockdep.c:4727
Code: 00 8b 1b 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 40 28 2b 94 be 08 00 00 00 e8 06 ad 8a 00 48 0f a3 1d 3e 1d b0 12 <73> 10 48 69 c3 c8 00 00 00 48 8d 98 00 a7 c2 93 eb 68 48 c7 c0 80
RSP: 0018:ffffc90000a18628 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff817b0afa
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff942b2840
RBP: 0000000000000000 R08: ffffffff942b2847 R09: 1ffffffff2856508
R10: dffffc0000000000 R11: fffffbfff2856509 R12: ffff8880302546cc
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff888030254738
FS: 000055558a7cc500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1c6d3142d8 CR3: 0000000049aec000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_usage kernel/locking/lockdep.c:4635 [inline]
__lock_acquire+0xbc3/0x2100 kernel/locking/lockdep.c:5180
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
debug_object_activate+0x17f/0x580 lib/debugobjects.c:818
debug_hrtimer_activate kernel/time/hrtimer.c:428 [inline]
debug_activate kernel/time/hrtimer.c:469 [inline]
enqueue_hrtimer+0x30/0x3c0 kernel/time/hrtimer.c:1076
__run_hrtimer kernel/time/hrtimer.c:1756 [inline]
__hrtimer_run_queues+0x6cb/0xd30 kernel/time/hrtimer.c:1803
hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865
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+0x52/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:variable_ffs arch/x86/include/asm/bitops.h:321 [inline]
RIP: 0010:handle_softirqs+0x1ef/0x9b0 kernel/softirq.c:549
Code: 00 00 00 45 0f b7 e4 48 c7 c7 c0 8c 09 8c e8 a8 48 6a 0a 65 66 c7 05 c6 19 a2 7e 00 00 e8 09 6e 45 00 fb 49 c7 c6 c0 b0 60 8e ff ff ff ff 41 0f bc c4 41 89 c7 41 ff c7 0f 84 0a 04 00 00 44
RSP: 0018:ffffc90000a18e20 EFLAGS: 00000282
RAX: c2aa7c49e8f02e00 RBX: ffffc90000a18ee0 RCX: ffffffff817b0afa
RDX: dffffc0000000000 RSI: ffffffff8c0a9240 RDI: ffffffff8c5fbe80
RBP: ffffc90000a18f50 R08: ffffffff942b28f7 R09: 1ffffffff285651e
R10: dffffc0000000000 R11: fffffbfff285651f R12: 0000000000000008
R13: 0000000000000000 R14: ffffffff8e60b0c0 R15: 1ffff1100604a780
__do_softirq kernel/softirq.c:595 [inline]
invoke_softirq kernel/softirq.c:435 [inline]
__irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662
irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
common_interrupt+0xb9/0xd0 arch/x86/kernel/irq.c:278
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
RIP: 0010:__asan_memset+0x23/0x50 mm/kasan/shadow.c:84
Code: 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 56 53 48 89 d3 41 89 f6 48 89 fd 48 8b 4c 24 18 48 89 d6 ba 01 00 00 00 e8 3d e6 ff ff <84> c0 74 12 48 89 ef 44 89 f6 48 89 da 5b 41 5e 5d e9 b7 56 c6 09
RSP: 0018:ffffc9000bec78e0 EFLAGS: 00000256
RAX: ffff888030253c01 RBX: 0000000000000060 RCX: ffffffff814be076
RDX: 0000000000000001 RSI: 0000000000000060 RDI: ffffc9000bec7960
RBP: ffffc9000bec7960 R08: ffffc9000bec79bf R09: 1ffff920017d8f37
R10: dffffc0000000000 R11: fffff520017d8f38 R12: 0000000000000000
R13: ffffffff818b1f20 R14: 0000000000000000 R15: 0000000000000000
__unwind_start+0x36/0x740 arch/x86/kernel/unwind_orc.c:688
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xe5/0x150 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xaa/0xc0 mm/kasan/generic.c:548
slab_free_hook mm/slub.c:2299 [inline]
slab_free mm/slub.c:4598 [inline]
kmem_cache_free+0x2fb/0x410 mm/slub.c:4700
sk_prot_free net/core/sock.c:2199 [inline]
__sk_destruct+0x46a/0x5f0 net/core/sock.c:2293
inet_release+0x17d/0x200 net/ipv4/af_inet.c:435
__sock_release net/socket.c:640 [inline]
sock_close+0xbc/0x240 net/socket.c:1408
__fput+0x23c/0xa50 fs/file_table.c:450
__do_sys_close fs/open.c:1547 [inline]
__se_sys_close fs/open.c:1532 [inline]
__x64_sys_close+0x7f/0x110 fs/open.c:1532
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: 0033:0x7f1c6d17eb7a
Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 43 91 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 a3 91 02 00 8b 44 24
RSP: 002b:00007fffed70f590 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f1c6d17eb7a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007fffed70f5dc R08: 00007fffed70eedc R09: 0079746972756365
R10: 00007fffed70ef40 R11: 0000000000000293 R12: 0000000000000032
R13: 00000000000bb18d R14: 00000000000bb18d R15: 00007fffed70f630
task:syz.9.1608 state:R running task stack:22520 pid:12959 tgid:12958 ppid:9286 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5371 [inline]
__schedule+0x189f/0x4c80 kernel/sched/core.c:6758
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6937
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6961
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
_raw_spin_unlock_irq+0x44/0x50 kernel/locking/spinlock.c:202
spin_unlock_irq include/linux/spinlock.h:401 [inline]
loop_queue_work drivers/block/loop.c:894 [inline]
loop_queue_rq+0xa01/0xaf0 drivers/block/loop.c:1876
__blk_mq_issue_directly block/blk-mq.c:2690 [inline]
blk_mq_request_issue_directly+0x352/0x6a0 block/blk-mq.c:2777
blk_mq_plug_issue_direct+0x2ec/0x670 block/blk-mq.c:2798
blk_mq_flush_plug_list+0x838/0x1870 block/blk-mq.c:2909
__blk_flush_plug+0x420/0x500 block/blk-core.c:1213
blk_finish_plug+0x5e/0x80 block/blk-core.c:1240
ext4_do_writepages+0x3537/0x3df0 fs/ext4/inode.c:2786
ext4_writepages+0x213/0x3c0 fs/ext4/inode.c:2824
do_writepages+0x35f/0x880 mm/page-writeback.c:2681
filemap_fdatawrite_wbc mm/filemap.c:397 [inline]
__filemap_fdatawrite_range mm/filemap.c:430 [inline]
filemap_write_and_wait_range+0x283/0x3a0 mm/filemap.c:684
ext4_punch_hole+0x1af/0xc20 fs/ext4/inode.c:3964
ext4_fallocate+0x2a2/0x1ea0 fs/ext4/extents.c:4772
vfs_fallocate+0x569/0x6e0 fs/open.c:327
ksys_fallocate fs/open.c:351 [inline]
__do_sys_fallocate fs/open.c:356 [inline]
__se_sys_fallocate fs/open.c:354 [inline]
__x64_sys_fallocate+0xbc/0x110 fs/open.c:354
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: 0033:0x7f663cd7ff19
RSP: 002b:00007f663db27058 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f663cf45fa0 RCX: 00007f663cd7ff19
RDX: 0000000005000000 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00007f663cdf3cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000008000c62 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f663cf45fa0 R15: 00007fff1ed8f9e8
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g40089 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=41116
rcu: rcu_preempt kthread starved for 10502 jiffies! g40089 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:25912 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5371 [inline]
__schedule+0x189f/0x4c80 kernel/sched/core.c:6758
__schedule_loop kernel/sched/core.c:6835 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6850
schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244