syzbot

watchdog: BUG: soft lockup - CPU#1 stuck for 122s! [syz-executor.1:32766]
Modules linked in:
irq event stamp: 157866
hardirqs last  enabled at (157865): [<ffffffff88000c42>] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596
hardirqs last disabled at (157866): [<ffffffff87e462cd>] idtentry_enter_cond_rcu+0x1d/0x50 arch/x86/entry/common.c:607
softirqs last  enabled at (286): [<ffffffff88200748>] __do_softirq+0x748/0xa60 kernel/softirq.c:319
softirqs last disabled at (267): [<ffffffff88000f0f>] asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711
CPU: 1 PID: 32766 Comm: syz-executor.1 Not tainted 5.8.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:csd_lock_wait kernel/smp.c:108 [inline]
RIP: 0010:smp_call_function_single+0x192/0x4f0 kernel/smp.c:382
Code: 10 8b 7c 24 1c 48 8d 74 24 40 48 89 44 24 50 48 8b 44 24 08 48 89 44 24 58 e8 fa f9 ff ff 41 89 c5 eb 07 e8 f0 ff 0a 00 f3 90 <44> 8b 64 24 48 31 ff 41 83 e4 01 44 89 e6 e8 5b fc 0a 00 45 85 e4
RSP: 0018:ffffc900088875c0 EFLAGS: 00000246
RAX: 0000000000040000 RBX: 1ffff92001110ebc RCX: ffffc9000432b000
RDX: 0000000000040000 RSI: ffffffff8168b770 RDI: 0000000000000005
RBP: ffffc90008887698 R08: 0000000000000001 R09: ffff8880ae636dc7
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000040
FS:  00007fb3ad25a700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000cf3d CR3: 000000009ea62000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 smp_call_function_many_cond+0x1a4/0x990 kernel/smp.c:518
 smp_call_function_many kernel/smp.c:577 [inline]
 smp_call_function kernel/smp.c:599 [inline]
 on_each_cpu+0x4a/0x240 kernel/smp.c:699
 __purge_vmap_area_lazy+0x11e/0x1f20 mm/vmalloc.c:1367
 _vm_unmap_aliases.part.0+0x3cc/0x4d0 mm/vmalloc.c:1800
 _vm_unmap_aliases mm/vmalloc.c:1774 [inline]
 vm_unmap_aliases+0x42/0x50 mm/vmalloc.c:1823
 change_page_attr_set_clr+0x241/0x500 arch/x86/mm/pat/set_memory.c:1732
 change_page_attr_clear arch/x86/mm/pat/set_memory.c:1789 [inline]
 set_memory_ro+0x78/0xa0 arch/x86/mm/pat/set_memory.c:1935
 bpf_jit_binary_lock_ro include/linux/filter.h:815 [inline]
 bpf_int_jit_compile+0xd84/0x110c arch/x86/net/bpf_jit_comp.c:1929
 bpf_prog_select_runtime+0x591/0xb00 kernel/bpf/core.c:1807
 bpf_prog_load+0xdda/0x1b20 kernel/bpf/syscall.c:2198
 __do_sys_bpf+0x1ed7/0x4b20 kernel/bpf/syscall.c:4114
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45cb29
Code: Bad RIP value.
RSP: 002b:00007fb3ad259c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00000000004db2a0 RCX: 000000000045cb29
RDX: 0000000000000048 RSI: 000000002000e000 RDI: 0000000000000005
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000070 R14: 00000000004c3450 R15: 00007fb3ad25a6d4
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 268 Comm: kworker/u4:4 Not tainted 5.8.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:match_held_lock+0xa/0x170 kernel/locking/lockdep.c:4442
Code: c6 60 aa 4b 88 48 c7 c7 a0 aa 4b 88 e8 d1 5c 60 f9 0f 0b eb c9 90 66 2e 0f 1f 84 00 00 00 00 00 48 39 77 10 0f 84 99 00 00 00 <66> f7 47 22 f0 ff 74 4f 55 53 48 83 ec 10 48 8b 46 08 48 85 c0 0f
RSP: 0018:ffffc90000007d90 EFLAGS: 00000006
RAX: 000000000000000a RBX: 0000000000000002 RCX: 1ffffffff1302724
RDX: dffffc0000000000 RSI: ffffffff89bc10c0 RDI: ffff8880a8ab2ae0
RBP: ffff8880a8ab21c0 R08: 0000000000000000 R09: ffffffff8aae594f
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff89bc10c0
R13: ffff8880a8ab2a90 R14: ffff8880a8ab2ae0 R15: 0000000000000082
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e622000 CR3: 000000009474a000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __lock_is_held kernel/locking/lockdep.c:4733 [inline]
 lock_is_held_type+0x72/0xe0 kernel/locking/lockdep.c:4996
 lock_is_held include/linux/lockdep.h:425 [inline]
 rcu_read_lock_sched_held+0x3a/0xb0 kernel/rcu/update.c:135
 trace_hrtimer_cancel include/trace/events/timer.h:290 [inline]
 debug_deactivate kernel/time/hrtimer.c:483 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1488 [inline]
 __hrtimer_run_queues+0xd59/0xfc0 kernel/time/hrtimer.c:1584
 hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1646
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
 __sysvec_apic_timer_interrupt+0x142/0x5e0 arch/x86/kernel/apic/apic.c:1097
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 sysvec_apic_timer_interrupt+0xe0/0x120 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:765 [inline]
RIP: 0010:lock_acquire+0x270/0xad0 kernel/locking/lockdep.c:4962
Code: 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 f8 06 00 00 48 83 3d 6d d0 5a 08 00 0f 84 a6 05 00 00 48 8b 7c 24 08 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 03 44 24 10 48 c7
RSP: 0018:ffffc90001b37b80 EFLAGS: 00000282
RAX: 1ffffffff1369c08 RBX: ffff8880a8ab21c0 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 77199072a644b19c RDI: 0000000000000282
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8c58fa27
R10: fffffbfff18b1f44 R11: 0000000000000000 R12: 0000000000000002
R13: ffffffff89bc1180 R14: 0000000000000000 R15: ffff8880a8ab21c0
 rcu_lock_acquire include/linux/rcupdate.h:241 [inline]
 rcu_read_lock include/linux/rcupdate.h:634 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:407 [inline]
 batadv_nc_worker+0x12d/0xe50 net/batman-adv/network-coding.c:718
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293