rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2635 jiffies s: 225337 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5113 Comm: syz-executor.1 Not tainted 6.1.0-syzkaller-04278-g256cbafb0a9a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:__lock_release kernel/locking/lockdep.c:5373 [inline]
RIP: 0010:lock_release+0x31d/0x810 kernel/locking/lockdep.c:5688
Code: 04 02 84 c0 74 08 3c 03 0f 8e 05 04 00 00 48 89 da 45 89 a7 30 0a 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 85 6c 04 00 00 49 8d bf 28 0a 00 00 48 8b 1b 48 b8 00 00 00 00
RSP: 0018:ffffc90000007b30 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffff888029718ba0 RCX: ffffc90000007b80
RDX: 1ffff110052e3174 RSI: 0000000000000000 RDI: ffff888029718bc2
RBP: 1ffff92000000f68 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000009
R13: 000000000000000a R14: ffff888029718a30 R15: ffff888029718000
FS:  000055555636c400(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffeea7a0fe8 CR3: 000000004f700000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 local_lock_release include/linux/local_lock_internal.h:38 [inline]
 get_random_u32+0x3db/0x7d0 drivers/char/random.c:532
 __get_random_u32_below+0x17/0x90 drivers/char/random.c:546
 get_random_u32_below include/linux/random.h:63 [inline]
 mrp_join_timer_arm+0x20/0x70 net/802/mrp.c:595
 mrp_join_timer+0xf5/0x120 net/802/mrp.c:611
 call_timer_fn+0x1da/0x7c0 kernel/time/timer.c:1700
 expire_timers+0x2c6/0x5c0 kernel/time/timer.c:1751
 __run_timers kernel/time/timer.c:2022 [inline]
 __run_timers kernel/time/timer.c:1995 [inline]
 run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035
 __do_softirq+0x1fb/0xadc kernel/softirq.c:571
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662
 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1107
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:lock_acquire+0x227/0x630 kernel/locking/lockdep.c:5636
Code: 8f 9e 7e 83 f8 01 0f 85 3a 03 00 00 9c 58 f6 c4 02 0f 85 25 03 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc9000404f608 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000809ec4 RCX: ffffffff8163a31e
RDX: 1ffff110052e3146 RSI: 0000000000000002 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff91335b77
R10: fffffbfff2266b6e R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888028c3e4a0 R15: 0000000000000000
 __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:350 [inline]
 ext4_mb_free_metadata.isra.0+0x519/0xe00 fs/ext4/mballoc.c:5761
 ext4_mb_clear_bb fs/ext4/mballoc.c:6002 [inline]
 ext4_free_blocks+0xfe3/0x2300 fs/ext4/mballoc.c:6173
 ext4_remove_blocks fs/ext4/extents.c:2545 [inline]
 ext4_ext_rm_leaf fs/ext4/extents.c:2710 [inline]
 ext4_ext_remove_space+0x203c/0x46e0 fs/ext4/extents.c:2958
 ext4_ext_truncate+0x34b/0x400 fs/ext4/extents.c:4416
 ext4_truncate+0xfea/0x15d0 fs/ext4/inode.c:4342
 ext4_evict_inode+0xc00/0x1eb0 fs/ext4/inode.c:286
 evict+0x2ed/0x6b0 fs/inode.c:664
 iput_final fs/inode.c:1747 [inline]
 iput.part.0+0x59b/0x880 fs/inode.c:1773
 iput+0x5c/0x80 fs/inode.c:1763
 d_delete_notify include/linux/fsnotify.h:261 [inline]
 vfs_rmdir.part.0+0x496/0x5a0 fs/namei.c:4134
 vfs_rmdir fs/namei.c:4106 [inline]
 do_rmdir+0x395/0x410 fs/namei.c:4182
 __do_sys_unlinkat fs/namei.c:4362 [inline]
 __se_sys_unlinkat fs/namei.c:4356 [inline]
 __x64_sys_unlinkat+0xef/0x130 fs/namei.c:4356
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb84aa8ba47
Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 07 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffeea7a1248 EFLAGS: 00000207 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00007fb84aa8ba47
RDX: 0000000000000200 RSI: 00007ffeea7a23d0 RDI: 00000000ffffff9c
RBP: 00007ffeea7a1310 R08: 0000000000000000 R09: 00007ffeea7a10e0
R10: 000055555636d8e3 R11: 0000000000000207 R12: 00007fb84aae6b24
R13: 00007ffeea7a23d0 R14: 000055555636d810 R15: 00007ffeea7a2410
 </TASK>