watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz-executor.1:14728] Modules linked in: irq event stamp: 25577425 hardirqs last enabled at (25577424): [] restore_regs_and_return_to_kernel+0x0/0x2e hardirqs last disabled at (25577425): [] apic_timer_interrupt+0x8a/0xa0 arch/x86/entry/entry_64.S:792 softirqs last enabled at (143548): [] __do_softirq+0x664/0x9bf kernel/softirq.c:314 softirqs last disabled at (179769): [] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (179769): [] irq_exit+0x15b/0x1a0 kernel/softirq.c:409 CPU: 1 PID: 14728 Comm: syz-executor.1 Not tainted 4.14.172-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88804d04e5c0 task.stack: ffff8881fd940000 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:kmem_cache_free+0xa9/0x2b0 mm/slab.c:3759 RSP: 0018:ffff8880aeb07738 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000007 RBX: ffff88809ec42ac0 RCX: 1ffff11009a09de0 RDX: 0000000000000000 RSI: ffff88804d04eee0 RDI: 0000000000000286 RBP: ffff88821ac143c0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000286 R13: ffffffff84f8f548 R14: ffff8880a8fe4318 R15: ffff88809ec42ac0 FS: 00007f81221fd700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3082f000 CR3: 000000005434e000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kfree_skbmem+0x98/0x100 net/core/skbuff.c:586 __kfree_skb net/core/skbuff.c:646 [inline] consume_skb+0xaf/0x330 net/core/skbuff.c:705 sctp_chunk_destroy net/sctp/sm_make_chunk.c:1442 [inline] sctp_chunk_put+0x167/0x250 net/sctp/sm_make_chunk.c:1469 sctp_packet_pack net/sctp/output.c:485 [inline] sctp_packet_transmit+0x1021/0x2d70 net/sctp/output.c:605 sctp_outq_flush+0xc54/0x2dd0 net/sctp/outqueue.c:1187 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1787 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1179 [inline] sctp_do_sm+0x419/0x4a90 net/sctp/sm_sideeffect.c:1150 sctp_generate_heartbeat_event+0x1da/0x3f0 net/sctp/sm_sideeffect.c:391 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279 expire_timers kernel/time/timer.c:1318 [inline] __run_timers kernel/time/timer.c:1636 [inline] __run_timers kernel/time/timer.c:1604 [inline] run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649 __do_softirq+0x254/0x9bf kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x15b/0x1a0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:preempt_schedule_irq+0xa6/0x140 kernel/sched/core.c:3611 RSP: 0018:ffff8881fd947160 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff0fa2ce3 RBX: dffffc0000000000 RCX: 1ffff11009a09dd1 RDX: 0000000000000000 RSI: ffff88804d04ee90 RDI: ffff88804d04ee3c RBP: ffffed1009a09cb8 R08: 0000013b7f13a802 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88804d04e5c0 R13: ffffffff87d16718 R14: 0000000000000000 R15: 0000000000000000 retint_kernel+0x1b/0x2d RIP: 0010:preempt_schedule_common+0x0/0xc0 kernel/sched/core.c:3491 RSP: 0018:ffff8881fd947230 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000286 RBX: 0000000000000286 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffff88804d04ee90 RDI: 0000000000000001 RBP: ffff8881fd947280 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88804d04e958 R14: ffff8880a98384c8 R15: ffffffff87d86768 ___preempt_schedule+0x16/0x18 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] _raw_spin_unlock_irqrestore+0xb7/0xe0 kernel/locking/spinlock.c:192 rcu_read_unlock_special+0x62a/0xcf0 kernel/rcu/tree_plugin.h:528 __rcu_read_unlock+0x158/0x160 kernel/rcu/update.c:260 rcu_read_unlock include/linux/rcupdate.h:684 [inline] is_bpf_text_address+0x86/0x120 kernel/bpf/core.c:458 kernel_text_address+0x6e/0xe0 kernel/extable.c:150 __kernel_text_address+0x9/0x30 kernel/extable.c:105 unwind_get_return_address arch/x86/kernel/unwind_orc.c:255 [inline] unwind_get_return_address+0x5a/0xa0 arch/x86/kernel/unwind_orc.c:250 __save_stack_trace+0x7b/0xd0 arch/x86/kernel/stacktrace.c:45 save_stack+0x32/0xa0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc mm/kasan/kasan.c:551 [inline] kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:529 slab_post_alloc_hook mm/slab.h:442 [inline] slab_alloc mm/slab.c:3390 [inline] kmem_cache_alloc+0x114/0x770 mm/slab.c:3550 ext4_alloc_inode+0x19/0x610 fs/ext4/super.c:1002 alloc_inode+0x5d/0x170 fs/inode.c:209 new_inode_pseudo+0x14/0xe0 fs/inode.c:898 new_inode+0x1b/0x40 fs/inode.c:927 __ext4_new_inode+0x32c/0x4860 fs/ext4/ialloc.c:837 ext4_create+0x1cf/0x4e0 fs/ext4/namei.c:2486 lookup_open+0x10e8/0x1750 fs/namei.c:3241 do_last fs/namei.c:3334 [inline] path_openat+0xfc1/0x3c50 fs/namei.c:3569 do_filp_open+0x18e/0x250 fs/namei.c:3603 do_sys_open+0x29d/0x3f0 fs/open.c:1084 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45c479 RSP: 002b:00007f81221fcc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f81221fd6d4 RCX: 000000000045c479 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040 RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000098 R14: 00000000004c2eef R15: 000000000076bf2c Code: 0f 84 cb 00 00 00 41 f7 c4 00 02 00 00 0f 84 9c 00 00 00 e8 1a 72 c2 ff 48 83 3d 3a 02 4e 06 00 0f 84 f5 01 00 00 4c 89 e7 57 9d <0f> 1f 44 00 00 4c 8b 64 24 20 0f 1f 44 00 00 65 8b 05 41 1c 7e Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 478 Comm: syz-executor.5 Not tainted 4.14.172-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880230a85c0 task.stack: ffff888215fe0000 RIP: 0010:__lock_release kernel/locking/lockdep.c:3800 [inline] RIP: 0010:lock_release+0x524/0x7f0 kernel/locking/lockdep.c:4013 RSP: 0018:ffff888215fe7708 EFLAGS: 00000802 RAX: dffffc0000000000 RBX: 1ffff11042bfcee5 RCX: 1ffff110046151c6 RDX: 1ffff110046151c7 RSI: 0000000000000002 RDI: ffff8880230a85c0 RBP: 9465d12b387bc9b6 R08: 0000000000000001 R09: 0000000000000000 R10: ffff8880230a8e68 R11: ffff8880230a85c0 R12: ffffffff81885dff R13: 0000000000000003 R14: ffff8880230a85c0 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001cbf000 CR3: 0000000007c6a000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: page_remove_file_rmap mm/rmap.c:1245 [inline] page_remove_rmap+0x1b9/0x920 mm/rmap.c:1296 zap_pte_range mm/memory.c:1342 [inline] zap_pmd_range mm/memory.c:1444 [inline] zap_pud_range mm/memory.c:1473 [inline] zap_p4d_range mm/memory.c:1494 [inline] unmap_page_range+0xa60/0x1930 mm/memory.c:1515 unmap_single_vma+0x147/0x2b0 mm/memory.c:1560 unmap_vmas+0x9d/0x160 mm/memory.c:1590 exit_mmap+0x26d/0x4b0 mm/mmap.c:3056 __mmput kernel/fork.c:930 [inline] mmput+0x103/0x420 kernel/fork.c:951 exit_mm kernel/exit.c:545 [inline] do_exit+0x933/0x2b00 kernel/exit.c:845 do_group_exit+0x100/0x310 kernel/exit.c:955 get_signal+0x385/0x1ca0 kernel/signal.c:2418 do_signal+0x7c/0x1690 arch/x86/kernel/signal.c:814 exit_to_usermode_loop+0x159/0x220 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45c479 RSP: 002b:00007f146d58ccf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000076c108 RCX: 000000000045c479 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000076c108 RBP: 000000000076c100 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000076c10c R13: 00007ffd78a8a50f R14: 00007f146d58d9c0 R15: 000000000076c10c Code: be 65 ff 0d bf ba bb 7e 0f 85 42 fc ff ff e8 ed 0c ba ff e9 38 fc ff ff 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 08 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 7e 02 00 00 45 8d 4f ff 45