mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.3:3933] Modules linked in: irq event stamp: 3502967 hardirqs last enabled at (3502966): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (3502967): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (3491610): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (3491613): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (3491613): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 3933 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 RIP: 0010:unwind_next_frame+0xa45/0x1400 arch/x86/kernel/unwind_orc.c:509 Code: 30 48 c1 ea 03 80 3c 02 00 0f 85 8c 09 00 00 48 8b 54 24 08 4d 89 66 38 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 85 52 09 00 00 49 8d 7e 58 49 c7 46 50 00 00 00 00 48 b8 00 00 RSP: 0018:ffff8880ba007730 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff11017400eef RCX: 0000000000000000 RDX: 1ffff11017400f16 RSI: ffff8880ba0076c0 RDI: ffff8880ba007c10 RBP: 0000000000000002 R08: ffffffff8bf58052 R09: ffffffff8bf58018 R10: ffff8880ba0078bf R11: 0000000000074071 R12: ffff8880ba007c18 R13: ffff8880ba007895 R14: ffff8880ba007860 R15: ffffffff8bf5804e FS: 00007fc0177ac700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555aa4708 CR3: 000000009136f000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 kmem_cache_alloc_node+0x146/0x3b0 mm/slab.c:3649 __alloc_skb+0x71/0x560 net/core/skbuff.c:193 __netdev_alloc_skb+0x76/0x460 net/core/skbuff.c:407 netdev_alloc_skb include/linux/skbuff.h:2680 [inline] dev_alloc_skb include/linux/skbuff.h:2693 [inline] __ieee80211_beacon_get+0xc7d/0x1a30 net/mac80211/tx.c:4352 ieee80211_beacon_get_tim+0x88/0x890 net/mac80211/tx.c:4463 ieee80211_beacon_get include/net/mac80211.h:4484 [inline] mac80211_hwsim_beacon_tx+0xff/0x680 drivers/net/wireless/mac80211_hwsim.c:1577 __iterate_interfaces+0x2e1/0x4a0 net/mac80211/util.c:614 ieee80211_iterate_active_interfaces_atomic+0x8d/0x170 net/mac80211/util.c:650 mac80211_hwsim_beacon+0xc9/0x190 drivers/net/wireless/mac80211_hwsim.c:1615 __tasklet_hrtimer_trampoline+0x29/0xa0 kernel/softirq.c:601 tasklet_action_common.constprop.0+0x265/0x360 kernel/softirq.c:522 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:pte_val arch/x86/include/asm/paravirt.h:389 [inline] RIP: 0010:pte_pfn arch/x86/include/asm/pgtable.h:197 [inline] RIP: 0010:_vm_normal_page+0xab/0x510 mm/memory.c:834 Code: 0f 85 16 04 00 00 48 c7 c0 b8 b4 cf 89 4c 8b 64 24 30 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 e1 03 00 00 <48> 83 3d d5 31 44 08 00 0f 84 6c 01 00 00 e8 82 02 d7 ff 4c 89 e7 RSP: 0018:ffff88801dfaf6c8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff139f697 RBX: dffffc0000000000 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: ffffffff818b82a1 RDI: ffff8880a9523c60 RBP: 1ffff11003bf5edb R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 800000009feb0007 R13: ffff8880a9523c60 R14: 00007fc01870a000 R15: ffff88801dfaf6f8 zap_pte_range mm/memory.c:1323 [inline] zap_pmd_range mm/memory.c:1463 [inline] zap_pud_range mm/memory.c:1492 [inline] zap_p4d_range mm/memory.c:1513 [inline] unmap_page_range+0x1141/0x2c50 mm/memory.c:1534 unmap_single_vma+0x198/0x300 mm/memory.c:1579 unmap_vmas+0xa9/0x180 mm/memory.c:1609 exit_mmap+0x2b9/0x530 mm/mmap.c:3093 __mmput kernel/fork.c:1016 [inline] mmput+0x14e/0x4a0 kernel/fork.c:1037 exit_mm kernel/exit.c:549 [inline] do_exit+0xaec/0x2be0 kernel/exit.c:857 do_group_exit+0x125/0x310 kernel/exit.c:967 get_signal+0x3f2/0x1f70 kernel/signal.c:2589 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fc018e38669 Code: Bad RIP value. RSP: 002b:00007fc0177ac168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 0000000000000044 RBX: 00007fc018f59f80 RCX: 00007fc018e38669 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000006 RBP: 00007fc018e93560 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdf8bf2aff R14: 00007fc0177ac300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: kworker/u4:1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 Workqueue: bat_events batadv_nc_worker RIP: 0010:lock_acquire+0x149/0x3c0 kernel/locking/lockdep.c:3908 Code: 65 8b 05 6a 2d b6 7e 83 f8 07 0f 87 e2 01 00 00 89 c0 48 0f a3 05 7f 8b db 09 0f 82 95 01 00 00 4c 8b 4c 24 08 44 89 ea 6a 00 <48> 89 ef 6a 00 45 89 f8 44 89 f1 44 89 e6 ff 74 24 60 ff 74 24 18 RSP: 0018:ffff8880b5047c50 EFLAGS: 00000086 RAX: 0000000000000000 RBX: ffff8880b503c600 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff8880b503ce84 RBP: ffffffff89f85fa0 R08: 0000000000000000 R09: 0000000000000286 R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000002 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055862e4d94f8 CR3: 000000009b681000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:627 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:419 [inline] batadv_nc_worker+0x12d/0xd50 net/batman-adv/network-coding.c:730 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415