syzbot

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Mixed NMI-safe readers for srcu_struct at 0xffffc9000fc868a8.
WARNING: CPU: 1 PID: 5262 at kernel/rcu/srcutree.c:453 srcu_readers_unlock_idx kernel/rcu/srcutree.c:453 [inline]
WARNING: CPU: 1 PID: 5262 at kernel/rcu/srcutree.c:453 srcu_readers_active_idx_check kernel/rcu/srcutree.c:466 [inline]
WARNING: CPU: 1 PID: 5262 at kernel/rcu/srcutree.c:453 try_check_zero+0x3aa/0x560 kernel/rcu/srcutree.c:1078
Modules linked in:
CPU: 1 PID: 5262 Comm: kworker/1:4 Not tainted 6.10.0-rc5-syzkaller-00018-g55027e689933 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: rcu_gp process_srcu
RIP: 0010:srcu_readers_unlock_idx kernel/rcu/srcutree.c:453 [inline]
RIP: 0010:srcu_readers_active_idx_check kernel/rcu/srcutree.c:466 [inline]
RIP: 0010:try_check_zero+0x3aa/0x560 kernel/rcu/srcutree.c:1078
Code: e9 8a fe ff ff 80 3d 04 9d 57 0e 00 0f 85 47 fe ff ff c6 05 f7 9c 57 0e 01 90 48 c7 c7 a0 46 2e 8b 4c 89 f6 e8 37 93 dc ff 90 <0f> 0b 90 90 e9 26 fe ff ff 48 83 c4 48 31 c0 5b 5d 41 5c 41 5d 41
RSP: 0018:ffffc90002b1fb70 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffffe8ffffd57600 RCX: ffffffff81511289
RDX: ffff8880200ea440 RSI: ffffffff81511296 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000003 R12: 000000000000001f
R13: dffffc0000000000 R14: ffffc9000fc868a8 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88802c100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002f810ff8 CR3: 000000006158a000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 srcu_advance_state kernel/rcu/srcutree.c:1684 [inline]
 process_srcu+0x3f9/0x1730 kernel/rcu/srcutree.c:1811
 process_one_work+0x958/0x1ad0 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393
 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
 </TASK>