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WARNING: CPU: 3 PID: 8791 at kernel/rcu/tree_stall.h:826 rcu_check_gp_start_stall.part.0+0x325/0x4b0 kernel/rcu/tree_stall.h:818
Modules linked in:
CPU: 3 PID: 8791 Comm: kworker/u16:2 Not tainted 5.13.0-rc2-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Workqueue: bat_events batadv_nc_worker
RIP: 0010:rcu_check_gp_start_stall.part.0+0x325/0x4b0 kernel/rcu/tree_stall.h:826
Code: 0f 88 fa 00 00 00 be 04 00 00 00 48 c7 c7 a0 54 77 90 e8 be df 58 00 b8 01 00 00 00 87 05 63 5b 16 0f 85 c0 0f 85 c9 00 00 00 <0f> 0b 48 81 fd 80 1e f8 8b 48 c7 c3 6c 8e c9 8d 74 58 48 b8 00 00
RSP: 0018:ffffc900005a8e30 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 000000010000a767 RCX: ffffffff8160f932
RDX: fffffbfff20eea94 RSI: 0000000000000004 RDI: ffffffff907754a0
RBP: ffffffff8bf81e80 R08: 0000000000000001 R09: 0000000000000003
R10: fffffbfff20eea94 R11: 1ffff110059a6c2e R12: 1ffffffff1781e30
R13: 0000000000000246 R14: ffff88802cd36092 R15: 000000000000000a
FS:  0000000000000000(0000) GS:ffff88802cd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8fb2c75020 CR3: 0000000021bc1000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rcu_check_gp_start_stall kernel/rcu/tree_stall.h:789 [inline]
 rcu_core+0x4df/0x13b0 kernel/rcu/tree.c:2788
 __do_softirq+0x29b/0x9f6 kernel/softirq.c:559
 invoke_softirq kernel/softirq.c:433 [inline]
 __irq_exit_rcu+0x136/0x200 kernel/softirq.c:637
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647
RIP: 0010:debug_lockdep_rcu_enabled+0x1d/0x30 kernel/rcu/update.c:280
Code: cc cc cc cc cc cc cc cc cc cc cc cc cc 8b 05 e6 4e b3 04 85 c0 74 21 8b 05 7c 80 b3 04 85 c0 74 17 65 48 8b 04 25 00 f0 01 00 <8b> 80 f4 09 00 00 85 c0 0f 94 c0 0f b6 c0 c3 cc cc cc cc 55 53 48
RSP: 0018:ffffc900021f7c88 EFLAGS: 00000202
RAX: ffff888016db1c40 RBX: ffff88804626c0b0 RCX: 0000000000000000
RDX: ffff888016db1c40 RSI: ffffffff88b5e650 RDI: 0000000000000003
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff88b5e931 R11: 0000000000000000 R12: ffffc900021f7da8
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000016
 rcu_read_unlock include/linux/rcupdate.h:707 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
 batadv_nc_worker+0x755/0xe50 net/batman-adv/network-coding.c:715
 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
 kthread+0x3b1/0x4a0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294