watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.2:4400] Modules linked in: irq event stamp: 4675979 hardirqs last enabled at (4675978): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (4675979): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (4639588): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (4639591): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 4400 Comm: syz-executor.2 Not tainted 5.10.238 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:stack_trace_consume_entry+0x0/0x160 kernel/stacktrace.c:85 Code: 00 e9 4a ff ff ff 0f 1f 40 00 e8 7b a3 10 00 48 c7 c1 e0 48 48 84 31 d2 be 80 01 00 00 48 c7 c7 e0 46 48 84 e9 41 cf 5e 00 cc <48> b8 00 00 00 00 00 fc ff df 55 53 48 89 fb 48 83 c7 10 48 89 fa RSP: 0018:ffff88806ce09730 EFLAGS: 00000282 RAX: ffffffff819cb4d9 RBX: ffffffff81302c70 RCX: 1ffff1100d9c1201 RDX: 1ffff1100d9c12f0 RSI: ffffffff819cb4d9 RDI: ffff88806ce097f0 RBP: ffff88806ce097c0 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000032042 R11: 1ffff1100d9c12d4 R12: ffff88806ce097f0 R13: 0000000000000000 R14: ffff888016d24ec0 R15: 0000000000000200 FS: 00007f6621c14700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4957441718 CR3: 0000000048826000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: arch_stack_walk+0x73/0xf0 arch/x86/kernel/stacktrace.c:27 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xc9/0xd0 mm/kasan/common.c:461 slab_post_alloc_hook mm/slab.h:532 [inline] slab_alloc_node mm/slub.c:2896 [inline] __kmalloc_node_track_caller+0x189/0x3b0 mm/slub.c:4496 __kmalloc_reserve net/core/skbuff.c:144 [inline] __alloc_skb+0xb1/0x5b0 net/core/skbuff.c:212 __netdev_alloc_skb+0x6e/0x360 net/core/skbuff.c:448 netdev_alloc_skb include/linux/skbuff.h:2855 [inline] dev_alloc_skb include/linux/skbuff.h:2868 [inline] __ieee80211_beacon_get+0x3af/0x1440 net/mac80211/tx.c:4876 ieee80211_beacon_get_tim+0x88/0x9f0 net/mac80211/tx.c:4990 ieee80211_beacon_get include/net/mac80211.h:4912 [inline] mac80211_hwsim_beacon_tx+0x111/0x940 drivers/net/wireless/mac80211_hwsim.c:1740 __iterate_interfaces+0x1f0/0x550 net/mac80211/util.c:792 ieee80211_iterate_active_interfaces_atomic+0x71/0x1c0 net/mac80211/util.c:828 mac80211_hwsim_beacon+0xd1/0x1d0 drivers/net/wireless/mac80211_hwsim.c:1793 __run_hrtimer kernel/time/hrtimer.c:1588 [inline] __hrtimer_run_queues+0x632/0xb40 kernel/time/hrtimer.c:1652 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1669 __do_softirq+0x1b8/0x7c9 kernel/softirq.c:298 asm_call_irq_on_stack+0x12/0x20 __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+0x80/0xa0 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+0x114/0x1b0 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x43/0xa0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:rcu_is_watching+0x0/0x70 kernel/rcu/tree.c:1108 Code: bd 3e 00 48 8b 54 24 08 48 8b 34 24 eb b2 48 89 d7 48 89 14 24 e8 40 bd 3e 00 48 8b 14 24 eb c0 66 2e 0f 1f 84 00 00 00 00 00 <53> 65 ff 05 d8 55 d4 7e 48 c7 c3 00 c0 03 00 65 48 03 1d 01 fc d3 RSP: 0018:ffff888048687608 EFLAGS: 00000216 RAX: 0000000000011d0d RBX: 0000000000000001 RCX: ffffc90001dfc000 RDX: 0000000000040000 RSI: ffffffff81e87cff RDI: 0000000000000005 RBP: 0000000000002000 R08: 0000000000000000 R09: ffffffff8686e6a7 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888009a08000 R13: 0000000000017f50 R14: ffff88800e140068 R15: ffff888009a08000 rcu_read_lock include/linux/rcupdate.h:718 [inline] disk_map_sector_rcu+0x5b4/0x770 block/genhd.c:322 blk_account_io_start+0xbf/0x170 block/blk-core.c:1314 blk_mq_bio_to_request block/blk-mq.c:1966 [inline] blk_mq_submit_bio+0x82c/0x1890 block/blk-mq.c:2216 __submit_bio_noacct_mq block/blk-core.c:1020 [inline] submit_bio_noacct+0xc64/0x1010 block/blk-core.c:1053 submit_bio+0xf3/0x4e0 block/blk-core.c:1123 submit_bh_wbc.constprop.0+0x580/0x780 fs/buffer.c:3054 submit_bh fs/buffer.c:3060 [inline] write_dirty_buffer fs/buffer.c:3128 [inline] write_dirty_buffer+0xcb/0x180 fs/buffer.c:3119 __flush_batch+0x116/0x2e0 fs/jbd2/checkpoint.c:170 jbd2_log_do_checkpoint+0x765/0xa00 fs/jbd2/checkpoint.c:323 jbd2_journal_flush+0x14b/0x530 fs/jbd2/journal.c:2303 __ext4_ioctl+0x2cd9/0x4190 fs/ext4/ioctl.c:949 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0x19a/0x210 fs/ioctl.c:739 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7f662469eb19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6621c14188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f66247b1f60 RCX: 00007f662469eb19 RDX: 00000000200004c0 RSI: 0000000040086607 RDI: 0000000000000007 RBP: 00007f66246f8f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe5138491f R14: 00007f6621c14300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 1 skipped: idling at default_idle+0xe/0x20 arch/x86/kernel/process.c:711 netlink: 124 bytes leftover after parsing attributes in process `syz-executor.5'. loop7: detected capacity change from 0 to 78848 nfs4: Unknown parameter 'wireguard' perf: interrupt took too long (2515 > 2500), lowering kernel.perf_event_max_sample_rate to 79000 perf: interrupt took too long (3169 > 3143), lowering kernel.perf_event_max_sample_rate to 63000 perf: interrupt took too long (3986 > 3961), lowering kernel.perf_event_max_sample_rate to 50000 perf: interrupt took too long (5014 > 4982), lowering kernel.perf_event_max_sample_rate to 39000 perf: interrupt took too long (6287 > 6267), lowering kernel.perf_event_max_sample_rate to 31000 loop3: detected capacity change from 0 to 33559040 perf: interrupt took too long (7870 > 7858), lowering kernel.perf_event_max_sample_rate to 25000 loop7: detected capacity change from 0 to 135266304 FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) perf: interrupt took too long (9838 > 9837), lowering kernel.perf_event_max_sample_rate to 20000 FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) ---------------- Code disassembly (best guess), 1 bytes skipped: 0: e9 4a ff ff ff jmpq 0xffffff4f 5: 0f 1f 40 00 nopl 0x0(%rax) 9: e8 7b a3 10 00 callq 0x10a389 e: 48 c7 c1 e0 48 48 84 mov $0xffffffff844848e0,%rcx 15: 31 d2 xor %edx,%edx 17: be 80 01 00 00 mov $0x180,%esi 1c: 48 c7 c7 e0 46 48 84 mov $0xffffffff844846e0,%rdi 23: e9 41 cf 5e 00 jmpq 0x5ecf69 28: cc int3 * 29: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax <-- trapping instruction 30: fc ff df 33: 55 push %rbp 34: 53 push %rbx 35: 48 89 fb mov %rdi,%rbx 38: 48 83 c7 10 add $0x10,%rdi 3c: 48 89 fa mov %rdi,%rdx