watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz-executor.1:1768] Modules linked in: irq event stamp: 13998242 hardirqs last enabled at (13998241): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 hardirqs last disabled at (13998242): [] sysvec_apic_timer_interrupt+0xb/0xc0 arch/x86/kernel/apic/apic.c:1097 softirqs last enabled at (7644): [] invoke_softirq kernel/softirq.c:432 [inline] softirqs last enabled at (7644): [] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636 softirqs last disabled at (7279): [] invoke_softirq kernel/softirq.c:432 [inline] softirqs last disabled at (7279): [] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636 CPU: 0 PID: 1768 Comm: syz-executor.1 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x60 kernel/kcov.c:197 Code: 81 e1 00 01 00 00 65 48 8b 14 25 40 70 02 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82 a4 15 00 00 85 c0 74 2b 8b 82 80 15 00 00 <83> f8 02 75 20 48 8b 8a 88 15 00 00 8b 92 84 15 00 00 48 8b 01 48 RSP: 0018:ffffc9000fbd79d0 EFLAGS: 00000246 RAX: 0000000000000002 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: ffff88807b4c8000 RSI: ffffffff81e313f7 RDI: 0000000000000003 RBP: 00000000000005ef R08: 00000000d4c3ab8a R09: 0000000000000001 R10: ffffffff81e313e9 R11: 0000000000000000 R12: ffff88801b7df200 R13: 0000000000000000 R14: ffff88807cd69940 R15: ffff88807cd69980 FS: 00007f5047236700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5047215718 CR3: 0000000073a08000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_add include/linux/list.h:70 [inline] list_add_tail include/linux/list.h:100 [inline] io_add_buffers fs/io_uring.c:4418 [inline] io_provide_buffers fs/io_uring.c:4439 [inline] io_issue_sqe+0x27c7/0x7010 fs/io_uring.c:6705 __io_queue_sqe fs/io_uring.c:6978 [inline] io_queue_sqe fs/io_uring.c:7020 [inline] io_submit_sqe fs/io_uring.c:7223 [inline] io_submit_sqes+0x1bca/0x8a20 fs/io_uring.c:7329 __do_sys_io_uring_enter+0xf6e/0x1f50 fs/io_uring.c:10043 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f5049d44ae9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5047236188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007f5049e58260 RCX: 00007f5049d44ae9 RDX: 0000000000000000 RSI: 00000000000002ff RDI: 0000000000000003 RBP: 00007f5049d9ef25 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f504a38bb2f R14: 00007f5047236300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 27461 Comm: kworker/u4:11 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:debug_lockdep_rcu_enabled+0x0/0x30 kernel/rcu/update.c:280 Code: c7 00 09 8c 89 e8 60 0d 00 00 65 c7 05 55 75 c9 76 00 00 00 00 eb bc e8 4e fb ff ff eb bc cc cc cc cc cc cc cc cc cc cc cc cc <8b> 05 4a b0 36 04 85 c0 74 21 8b 05 7c e3 36 04 85 c0 74 17 65 48 RSP: 0018:ffffc9000433fb88 EFLAGS: 00000283 RAX: 0000000000000000 RBX: 1ffff92000867f76 RCX: ffffffff815cdfc8 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffffff8d6fb490 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8d6fb497 R10: fffffbfff1adf692 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: ffffffff8b983a20 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f755f893000 CR3: 000000006fac2000 CR4: 00000000003506e0 Call Trace: rcu_read_lock_held_common kernel/rcu/update.c:104 [inline] rcu_read_lock_sched_held+0xd/0x70 kernel/rcu/update.c:123 trace_lock_acquire include/trace/events/lock.h:13 [inline] lock_acquire+0x442/0x510 kernel/locking/lockdep.c:5611 rcu_lock_acquire include/linux/rcupdate.h:268 [inline] rcu_read_lock include/linux/rcupdate.h:688 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline] batadv_nc_worker+0x12d/0xfa0 net/batman-adv/network-coding.c:723 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298 worker_thread+0x658/0x11f0 kernel/workqueue.c:2445 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess): 0: 81 e1 00 01 00 00 and $0x100,%ecx 6: 65 48 8b 14 25 40 70 mov %gs:0x27040,%rdx d: 02 00 f: a9 00 01 ff 00 test $0xff0100,%eax 14: 74 0e je 0x24 16: 85 c9 test %ecx,%ecx 18: 74 35 je 0x4f 1a: 8b 82 a4 15 00 00 mov 0x15a4(%rdx),%eax 20: 85 c0 test %eax,%eax 22: 74 2b je 0x4f 24: 8b 82 80 15 00 00 mov 0x1580(%rdx),%eax * 2a: 83 f8 02 cmp $0x2,%eax <-- trapping instruction 2d: 75 20 jne 0x4f 2f: 48 8b 8a 88 15 00 00 mov 0x1588(%rdx),%rcx 36: 8b 92 84 15 00 00 mov 0x1584(%rdx),%edx 3c: 48 8b 01 mov (%rcx),%rax 3f: 48 rex.W