watchdog: BUG: soft lockup - CPU#0 stuck for 134s! [syz-executor.4:15018] Modules linked in: irq event stamp: 27944371 hardirqs last enabled at (27944370): [] asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:611 hardirqs last disabled at (27944371): [] irqentry_enter+0x1d/0x50 kernel/entry/common.c:319 softirqs last enabled at (24347842): [] __do_softirq+0x3c6/0x579 kernel/softirq.c:325 softirqs last disabled at (24347845): [] asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706 CPU: 0 PID: 15018 Comm: syz-executor.4 Not tainted 5.9.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:lock_is_held_type+0xb2/0xf0 kernel/locking/lockdep.c:5050 Code: e0 03 39 c8 0f 94 c0 0f b6 c0 65 48 8b 0c 25 00 70 01 00 8b 91 e4 08 00 00 83 ea 01 66 85 d2 89 91 e4 08 00 00 75 2a 41 57 9d <48> 83 c4 08 5b 5d 41 5c 41 5d 41 5e 41 5f c3 31 c0 eb cd 48 83 c4 RSP: 0018:ffffc90000003d28 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffff88812e0dbb10 RCX: ffff88812e0db200 RDX: 0000000000000000 RSI: ffffffff84b0eea0 RDI: ffff88812e0dbb10 RBP: ffff88812e0db200 R08: 0000000000000001 R09: 0000000000000000 R10: ffff88812e0db200 R11: 0000000000000246 R12: ffffffff84b0eea0 R13: ffff88812e0dbae8 R14: 0000000000000001 R15: 0000000000000246 FS: 0000000000000000(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe672c5527 CR3: 000000011c5bd000 CR4: 0000000000350ef0 Call Trace: lock_is_held include/linux/lockdep.h:267 [inline] rcu_read_lock_held+0x4d/0x60 kernel/rcu/update.c:322 __rhashtable_lookup include/linux/rhashtable.h:594 [inline] rhltable_lookup include/linux/rhashtable.h:688 [inline] sta_info_hash_lookup net/mac80211/sta_info.c:162 [inline] sta_info_get_bss+0x2c5/0x400 net/mac80211/sta_info.c:199 __ieee80211_rx_handle_packet net/mac80211/rx.c:4657 [inline] ieee80211_rx_list+0x3a2/0xad0 net/mac80211/rx.c:4778 ieee80211_rx_napi+0x85/0x1a0 net/mac80211/rx.c:4799 ieee80211_rx include/net/mac80211.h:4435 [inline] ieee80211_tasklet_handler+0xb8/0xc0 net/mac80211/main.c:235 tasklet_action_common.isra.13+0x1bf/0x210 kernel/softirq.c:559 __do_softirq+0xd8/0x579 kernel/softirq.c:298 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706 __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] do_softirq_own_stack+0x73/0x90 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0xbb/0xe0 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x57/0xe0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581 RIP: 0010:mm_update_next_owner+0x179/0x280 kernel/exit.c:387 Code: ff 48 c7 c7 80 00 a9 84 48 8b 87 d8 03 00 00 48 8d b8 28 fc ff ff 48 81 ff 80 00 a9 84 0f 84 82 00 00 00 f6 80 4e fc ff ff 20 <75> dc 48 8b b0 60 03 00 00 48 8b 56 10 48 83 c6 10 4c 8d ba 68 fa RSP: 0018:ffffc9000387fd38 EFLAGS: 00000202 RAX: ffff88811e7e03d8 RBX: ffff88812e0db6f8 RCX: 00000000e6c0928c RDX: ffff88812d905140 RSI: ffff88813a31e010 RDI: ffff88811e7e0000 RBP: ffff88812e0db200 R08: 0000000000000001 R09: 0000000000000000 R10: ffff88812e0db200 R11: 0000000000000246 R12: 0000000000000000 R13: ffff88813ad8d780 R14: ffff88813ad8d838 R15: ffff888127cb0000 exit_mm kernel/exit.c:482 [inline] do_exit+0x372/0xcc0 kernel/exit.c:793 do_group_exit+0x42/0xb0 kernel/exit.c:903 get_signal+0x176/0xcc0 kernel/signal.c:2757 arch_do_signal+0x2b/0x8e0 arch/x86/kernel/signal.c:811 exit_to_user_mode_loop kernel/entry/common.c:136 [inline] exit_to_user_mode_prepare+0xff/0x1c0 kernel/entry/common.c:167 syscall_exit_to_user_mode+0x3c/0x270 kernel/entry/common.c:242 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e159 Code: Bad RIP value. RSP: 002b:00007f5c458eac68 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: 0000000000000004 RBX: 0000000000000005 RCX: 000000000045e159 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 000000002001d000 RBP: 000000000119bfd0 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffc6b2522bf R14: 00007f5c458eb9c0 R15: 000000000119bf8c Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 8849 Comm: syz-executor.1 Not tainted 5.9.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:queued_write_lock_slowpath+0x3a/0xa0 kernel/locking/qrwlock.c:77 Code: f0 0f b1 57 04 75 60 8b 03 85 c0 74 4b f0 81 03 00 01 00 00 b9 ff 00 00 00 be 00 01 00 00 8b 13 81 fa 00 01 00 00 74 0c f3 90 <8b> 13 81 fa 00 01 00 00 75 f4 89 f0 f0 0f b1 0b 3d 00 01 00 00 75 RSP: 0018:ffffc90000e97cb8 EFLAGS: 00000006 RAX: 0000000000000200 RBX: ffffffff84a05080 RCX: 00000000000000ff RDX: 0000000000000300 RSI: 0000000000000100 RDI: ffffffff84a05080 RBP: ffffffff84a05084 R08: 0000000000000001 R09: 0000000000000000 R10: ffff888127cb1900 R11: 0000000000000046 R12: 0000000000000010 R13: 0000000000000000 R14: dead000000000122 R15: ffff88813a8c3200 FS: 000000000293c940(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000052e3cc CR3: 000000013b3d5000 CR4: 0000000000350ee0 Call Trace: queued_write_lock include/asm-generic/qrwlock.h:95 [inline] do_raw_write_lock+0xa4/0xb0 kernel/locking/spinlock_debug.c:207 release_task.part.20+0xc1/0x690 kernel/exit.c:195 release_task kernel/exit.c:1088 [inline] wait_task_zombie kernel/exit.c:1088 [inline] wait_consider_task+0xc8c/0xe20 kernel/exit.c:1315 do_wait_thread kernel/exit.c:1378 [inline] do_wait+0x11c/0x330 kernel/exit.c:1449 kernel_wait4+0x99/0x140 kernel/exit.c:1621 __do_sys_wait4+0x83/0x90 kernel/exit.c:1649 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x417d4b Code: 54 55 41 89 d4 53 48 89 f5 89 fb 48 83 ec 10 e8 7b f9 ff ff 45 31 d2 41 89 c0 49 63 d4 48 89 ee 48 63 fb b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 19 44 89 c7 89 44 24 0c e8 b1 f9 ff ff 8b 44 RSP: 002b:00007ffd6659ba60 EFLAGS: 00000246 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 0000000000417d4b RDX: 0000000040000001 RSI: 00007ffd6659bac0 RDI: ffffffffffffffff RBP: 00007ffd6659bac0 R08: 0000000000000000 R09: 000000000293c940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000040000001 R13: 00007ffd6659bac0 R14: 00007ffd6659bad0 R15: 000000000001a058