watchdog: BUG: soft lockup - CPU#0 stuck for 134s! [syz-executor.0:16504] Modules linked in: irq event stamp: 17598823 hardirqs last enabled at (17598822): [] asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:654 hardirqs last disabled at (17598823): [] sysvec_apic_timer_interrupt+0xc/0x100 arch/x86/kernel/apic/apic.c:1096 softirqs last enabled at (15331510): [] asm_call_irq_on_stack+0xf/0x20 softirqs last disabled at (15331513): [] asm_call_irq_on_stack+0xf/0x20 CPU: 0 PID: 16504 Comm: syz-executor.0 Not tainted 5.11.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:deref_stack_reg+0xee/0x150 arch/x86/kernel/unwind_orc.c:355 Code: 4c 89 e2 48 89 ef e8 81 dc f5 ff 41 89 c0 31 c0 45 85 c0 75 27 48 ba 00 00 00 00 00 fc ff df 48 89 d9 48 89 ef e8 12 f9 ff ff <48> c1 e9 03 80 3c 11 00 75 31 48 89 03 b8 01 00 00 00 48 83 c4 08 RSP: 0018:ffffc90000007640 EFLAGS: 00000293 RAX: ffff8880147d1a00 RBX: ffffc90000007788 RCX: ffffc90000007788 RDX: dffffc0000000000 RSI: ffffc9000af57c90 RDI: ffffc9000af57c90 RBP: ffffc9000af57c90 R08: ffffffff8d65eb8e R09: 0000000000000001 R10: 0000000000082083 R11: 0000000000000001 R12: ffffc90000007748 R13: ffffc9000af50000 R14: ffffc90000007798 R15: ffffc90000007748 FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000052e8ac CR3: 000000003c7b2000 CR4: 0000000000350ef0 Call Trace: unwind_next_frame+0x12e5/0x1f90 arch/x86/kernel/unwind_orc.c:584 arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:401 [inline] ____kasan_kmalloc.constprop.0+0x82/0xa0 mm/kasan/common.c:429 kasan_slab_alloc include/linux/kasan.h:205 [inline] slab_post_alloc_hook mm/slab.h:512 [inline] slab_alloc_node mm/slub.c:2892 [inline] __kmalloc_node_track_caller+0x1e0/0x3e0 mm/slub.c:4496 __kmalloc_reserve net/core/skbuff.c:142 [inline] __alloc_skb+0xae/0x5a0 net/core/skbuff.c:210 skb_copy+0x137/0x2f0 net/core/skbuff.c:1514 mac80211_hwsim_tx_frame_no_nl.isra.0+0xb17/0x1330 drivers/net/wireless/mac80211_hwsim.c:1493 mac80211_hwsim_tx_frame+0x14f/0x1e0 drivers/net/wireless/mac80211_hwsim.c:1705 mac80211_hwsim_beacon_tx+0x4ba/0x910 drivers/net/wireless/mac80211_hwsim.c:1759 __iterate_interfaces+0x1e5/0x520 net/mac80211/util.c:793 ieee80211_iterate_active_interfaces_atomic+0x8d/0x170 net/mac80211/util.c:829 mac80211_hwsim_beacon+0xd5/0x1a0 drivers/net/wireless/mac80211_hwsim.c:1782 __run_hrtimer kernel/time/hrtimer.c:1519 [inline] __hrtimer_run_queues+0x693/0xea0 kernel/time/hrtimer.c:1583 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1600 __do_softirq+0x2a5/0x9f7 kernel/softirq.c:343 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:226 [inline] __irq_exit_rcu kernel/softirq.c:420 [inline] irq_exit_rcu+0x134/0x200 kernel/softirq.c:432 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628 RIP: 0010:__raw_read_unlock include/linux/rwlock_api_smp.h:226 [inline] RIP: 0010:_raw_read_unlock+0x15/0x40 kernel/locking/spinlock.c:255 Code: e8 00 04 6b f8 58 44 89 e0 5b 41 5c c3 e8 7a bd 12 f8 eb c5 90 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 ce fc 6a f8 48 89 ef a6 b4 6b f8 bf 01 00 00 00 e8 4c c1 5f f8 65 8b 05 05 68 14 77 RSP: 0018:ffffc9000af57b08 EFLAGS: 00000282 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 1ffff1100450f4a8 RSI: 0000000000000002 RDI: ffffffff8b00a080 RBP: ffffffff8b00a080 R08: 0000000000000001 R09: ffffffff8ebd57b7 R10: fffffbfff1d7aaf6 R11: 0000000000000000 R12: ffff888025508e00 R13: ffff88801f9f04a0 R14: ffff88801f9f0868 R15: ffff88801f9f0028 mm_update_next_owner+0x226/0x7a0 kernel/exit.c:417 exit_mm kernel/exit.c:499 [inline] do_exit+0xa8f/0x29e0 kernel/exit.c:810 do_group_exit+0x125/0x310 kernel/exit.c:920 get_signal+0x3ec/0x2010 kernel/signal.c:2770 arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x148/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e229 Code: Unable to access opcode bytes at RIP 0x45e1ff. RSP: 002b:00007f2c5a6a9cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000000 RBX: 000000000119bf88 RCX: 000000000045e229 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000119bf88 RBP: 000000000119bf80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007fff6bbe298f R14: 00007f2c5a6aa9c0 R15: 000000000119bf8c Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 16513 Comm: syz-executor.0 Not tainted 5.11.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:queued_write_lock_slowpath+0x131/0x270 kernel/locking/qrwlock.c:77 Code: 00 00 00 00 fc ff df 49 01 c7 41 83 c6 03 41 0f b6 07 41 38 c6 7c 08 84 c0 0f 85 fe 00 00 00 8b 03 3d 00 01 00 00 74 19 f3 90 <41> 0f b6 07 41 38 c6 7c ec 84 c0 74 e8 48 89 df e8 4a b8 5b 00 eb RSP: 0018:ffffc9000afa7a60 EFLAGS: 00000006 RAX: 0000000000000300 RBX: ffffffff8b00a080 RCX: ffffffff8159462a RDX: fffffbfff1601411 RSI: 0000000000000004 RDI: ffffffff8b00a080 RBP: 00000000000000ff R08: 0000000000000001 R09: ffffffff8b00a083 R10: fffffbfff1601410 R11: 0000000000000000 R12: 1ffff920015f4f4d R13: ffffffff8b00a084 R14: 0000000000000003 R15: fffffbfff1601410 FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000016b9e60 CR3: 000000003c7b2000 CR4: 0000000000350ee0 Call Trace: queued_write_lock include/asm-generic/qrwlock.h:95 [inline] do_raw_write_lock+0x1ce/0x280 kernel/locking/spinlock_debug.c:207 exit_notify kernel/exit.c:666 [inline] do_exit+0xbd7/0x29e0 kernel/exit.c:843 do_group_exit+0x125/0x310 kernel/exit.c:920 get_signal+0x3ec/0x2010 kernel/signal.c:2770 arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x148/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302 ret_from_fork+0x15/0x30 arch/x86/entry/entry_64.S:289 RIP: 0033:0x460bf9 Code: Unable to access opcode bytes at RIP 0x460bcf. RSP: 002b:00007f2c5a688db0 EFLAGS: 00000202 ORIG_RAX: 0000000000000038 RAX: 0000000000000000 RBX: 00007f2c5a689700 RCX: 0000000000460bf9 RDX: 00007f2c5a6899d0 RSI: 00007f2c5a688db0 RDI: 00000000003d0f00 RBP: 00007fff6bbe2af0 R08: 00007f2c5a689700 R09: 00007f2c5a689700 R10: 00007f2c5a6899d0 R11: 0000000000000202 R12: 0000000000000000 R13: 00007fff6bbe298f R14: 00007f2c5a6899c0 R15: 000000000119c034