watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.2:21449] Modules linked in: irq event stamp: 3635661 hardirqs last enabled at (3635660): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (3635661): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (0): [] copy_process.part.0+0x15b9/0x8260 kernel/fork.c:1855 softirqs last disabled at (309): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (309): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 21449 Comm: syz-executor.2 Not tainted 4.19.197-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:lock_release+0x429/0x8b0 kernel/locking/lockdep.c:3930 Code: 84 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 95 03 00 00 48 83 3d 7b 36 a6 08 00 0f 84 cc 01 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 49 c7 04 04 00 00 00 RSP: 0000:ffff8880ba007c38 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3049 RBX: ffff888046494100 RCX: 1ffff11008c92940 RDX: dffffc0000000000 RSI: 0000000000000004 RDI: 0000000000000286 RBP: 0000000000000003 R08: 0000000000000001 R09: 0000000000000003 R10: 0000000000000005 R11: 0000000000000000 R12: 1ffff11017400f8a R13: ff4efeb9a64d4256 R14: ffff888046494100 R15: 0000000000000004 FS: 00007f5e44697700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5e44696d58 CR3: 0000000047321000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline] _raw_spin_unlock+0x17/0x40 kernel/locking/spinlock.c:176 spin_unlock include/linux/spinlock.h:369 [inline] mrp_join_timer+0x7b/0xc0 net/802/mrp.c:596 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __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:write_comp_data+0x23/0x70 kernel/kcov.c:122 Code: 1f 84 00 00 00 00 00 49 89 f1 49 89 fa 65 48 8b 34 25 80 df 01 00 65 8b 05 ba 5e 9f 7e a9 00 01 1f 00 75 4f 8b 86 60 13 00 00 <83> f8 03 75 44 48 8b 86 68 13 00 00 8b b6 64 13 00 00 48 8b 38 48 RSP: 0000:ffff88801c5e7b90 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000002 RBX: 0000000000000001 RCX: ffffffff81936663 RDX: 0000000000000001 RSI: ffff888046494100 RDI: 0000000000000001 RBP: ffff8880b59f68c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 00000000006000c0 R13: 0000000000000000 R14: ffff8880b59f68c0 R15: ffff88801c5e7d68 rcu_read_lock include/linux/rcupdate.h:628 [inline] blk_cgroup_congested include/linux/blk-cgroup.h:256 [inline] mem_cgroup_throttle_swaprate+0x4a3/0x670 mm/swapfile.c:3750 mem_cgroup_try_charge_delay+0x67/0xa0 mm/memcontrol.c:6019 do_anonymous_page+0x814/0x1be0 mm/memory.c:3316 handle_pte_fault mm/memory.c:4173 [inline] __handle_mm_fault+0x227a/0x41c0 mm/memory.c:4299 handle_mm_fault+0x436/0xb10 mm/memory.c:4336 __do_page_fault+0x68e/0xd60 arch/x86/mm/fault.c:1412 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1205 RIP: 0033:0x404de9 Code: c4 a0 00 00 00 5d c3 66 2e 0f 1f 84 00 00 00 00 00 48 c7 c0 ff ff ff ff eb e4 0f 1f 80 00 00 00 00 55 53 48 81 ec 28 04 00 00 <48> 89 7c 24 18 48 89 74 24 10 48 89 54 24 08 48 8b 44 24 18 48 83 RSP: 002b:00007f5e44696d40 EFLAGS: 00010202 RAX: 0000000000404de0 RBX: 000000000056bf80 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000020000040 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 000000000056bf80 R13: 00007ffcfdfe4b0f R14: 00007f5e44697300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 4.19.197-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy11 ieee80211_iface_work RIP: 0010:memset_erms+0xb/0x10 arch/x86/lib/memset_64.S:67 Code: 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 f3 aa <4c> 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01 01 01 RSP: 0018:ffff8880ba107ac8 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffff88813bff0940 RCX: 0000000000000000 RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffff8880288947d0 RBP: 0000000000000002 R08: 0000000000000000 R09: ffff8880288947c0 R10: 0000000000000005 R11: 0000000000000000 R12: ffffea0000a22500 R13: ffff8880288945c0 R14: 0000000000000000 R15: ffff88813bff0940 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2eb24000 CR3: 000000009eccd000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: cache_init_objs mm/slab.c:2582 [inline] cache_grow_begin+0x52b/0x8a0 mm/slab.c:2709 cache_alloc_refill+0x273/0x340 mm/slab.c:3049 ____cache_alloc mm/slab.c:3132 [inline] slab_alloc_node mm/slab.c:3327 [inline] kmem_cache_alloc_node_trace+0x39e/0x3b0 mm/slab.c:3666 __do_kmalloc_node mm/slab.c:3688 [inline] __kmalloc_node_track_caller+0x38/0x70 mm/slab.c:3703 __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0xae/0x560 net/core/skbuff.c:205 skb_copy+0x139/0x2f0 net/core/skbuff.c:1358 mac80211_hwsim_tx_frame_no_nl.isra.0+0xb8a/0x1330 drivers/net/wireless/mac80211_hwsim.c:1353 mac80211_hwsim_tx_frame+0x12b/0x210 drivers/net/wireless/mac80211_hwsim.c:1556 mac80211_hwsim_beacon_tx+0x3f8/0x680 drivers/net/wireless/mac80211_hwsim.c:1595 __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 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1092 do_softirq.part.0+0x160/0x1c0 kernel/softirq.c:336 do_softirq kernel/softirq.c:328 [inline] __local_bh_enable_ip+0x20e/0x270 kernel/softirq.c:189 spin_unlock_bh include/linux/spinlock.h:374 [inline] cfg80211_put_bss net/wireless/scan.c:1333 [inline] cfg80211_put_bss+0x140/0x1e0 net/wireless/scan.c:1321 ieee80211_rx_bss_put net/mac80211/scan.c:39 [inline] ieee80211_rx_bss_put+0x3f/0x50 net/mac80211/scan.c:34 ieee80211_rx_bss_info net/mac80211/ibss.c:1198 [inline] ieee80211_rx_mgmt_probe_beacon+0xc5b/0x15c0 net/mac80211/ibss.c:1607 ieee80211_ibss_rx_queued_mgmt+0xe27/0x18b0 net/mac80211/ibss.c:1634 ieee80211_iface_work+0x5c4/0x8a0 net/mac80211/iface.c:1341 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