watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz-executor.3:1351] Modules linked in: irq event stamp: 3531871 hardirqs last enabled at (3531870): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (3531871): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (131632): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (131635): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (131635): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 1 PID: 1351 Comm: syz-executor.3 Not tainted 4.19.204-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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa3/0xe0 kernel/locking/spinlock.c:184 Code: 48 c7 c0 c8 82 f1 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 2f 48 83 3d dc 65 d8 01 00 74 15 48 89 df 57 9d <0f> 1f 44 00 00 eb b2 e8 1b 20 e7 f8 eb c0 0f 0b 0f 0b 48 c7 c7 c8 RSP: 0018:ffff8880ba107c28 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 ieee802154 phy0 wpan0: encryption failed: -22 RAX: 1ffffffff13e3059 RBX: 0000000000000282 RCX: 1ffff11043ca7162 RDX: dffffc0000000000 RSI: ffff88821e538af0 RDI: 0000000000000282 RBP: ffff8880ba122b00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000022b00 R14: 0000000000000000 R15: ffff8880ba122b00 ieee802154 phy1 wpan1: encryption failed: -22 FS: 00007f960b666700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055d48f5e82e8 CR3: 0000000226b61000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __mod_timer kernel/time/timer.c:1071 [inline] mod_timer+0x4ea/0x1010 kernel/time/timer.c:1114 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:preempt_schedule_irq+0xa6/0x140 kernel/sched/core.c:3744 Code: 00 00 e8 0d 49 29 f9 e8 e8 82 4f f9 4c 89 e8 48 c1 e8 03 80 3c 18 00 75 69 48 83 3d 4b 4f d9 01 00 74 5b fb 66 0f 1f 44 00 00 01 00 00 00 e8 40 d1 ff ff 48 c7 c0 d0 82 f1 89 48 c1 e8 03 80 RSP: 0018:ffff888214767ad0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e305b RBX: dffffc0000000000 RCX: 1ffff11043ca715d RDX: 0000000000000000 RSI: ffff88821e538ac8 RDI: ffff88821e538ac4 RBP: ffffed1043ca7048 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88821e538240 R13: ffffffff89f182d8 R14: 0000000000000000 R15: 0000000000000000 retint_kernel+0x1b/0x2d RIP: 0010:browse_rb mm/mmap.c:328 [inline] RIP: 0010:validate_mm+0x375/0x610 mm/mmap.c:387 Code: ff 49 89 c6 48 89 c6 4c 89 e7 e8 36 eb d4 ff 4d 39 f4 0f 85 69 bf 66 06 e8 18 ea d4 ff 48 8b 3c 24 e8 5f 73 8b 06 8b 44 24 10 <83> c0 01 89 44 24 14 48 8b 44 24 08 48 c1 e8 03 80 3c 18 00 0f 85 RSP: 0018:ffff888214767ba8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000004 RSI: 0000000000000004 RDI: 0000000000000001 RBP: ffff88809d6b5588 R08: 0000000000000000 R09: ffffed10143a2efe R10: ffff8880a1d177f3 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88809d6b5570 R14: 0000000000000000 R15: 0000000000970000 remove_vma_list mm/mmap.c:2553 [inline] do_munmap+0x857/0xde0 mm/mmap.c:2786 move_vma+0x52e/0x8b0 mm/mremap.c:348 mremap_to mm/mremap.c:484 [inline] __do_sys_mremap mm/mremap.c:552 [inline] __se_sys_mremap+0xbfb/0xf90 mm/mremap.c:515 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665e9 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:00007f960b666188 EFLAGS: 00000246 ORIG_RAX: 0000000000000019 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000800000 RSI: 0000000000001000 RDI: 0000000020a96000 RBP: 00000000004bfcc4 R08: 0000000020130000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffffc21c22f R14: 00007f960b666300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2913 Comm: kworker/u4:5 Not tainted 4.19.204-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: writeback wb_workfn (flush-8:0) RIP: 0010:__read_once_size include/linux/compiler.h:261 [inline] RIP: 0010:csd_lock_wait kernel/smp.c:108 [inline] RIP: 0010:smp_call_function_single+0x1db/0x420 kernel/smp.c:302 Code: 00 e8 a9 03 0a 00 48 8b 4c 24 08 48 8b 54 24 10 48 8d 74 24 40 8b 7c 24 1c e8 a1 f9 ff ff 41 89 c5 eb 07 e8 87 03 0a 00 f3 90 <44> 8b 64 24 58 31 ff 41 83 e4 01 44 89 e6 e8 e2 04 0a 00 45 85 e4 RSP: 0018:ffff8880ac3f6ce0 EFLAGS: 00000293 RAX: ffff8880abc32680 RBX: 1ffff1101587eda0 RCX: ffffffff81588f1e RDX: 0000000000000000 RSI: ffffffff81588f09 RDI: 0000000000000005 RBP: ffff8880ac3f6da8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f436e8d7028 CR3: 000000004b02e000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: smp_call_function_many+0x743/0x8d0 kernel/smp.c:434 flush_tlb_others arch/x86/include/asm/paravirt.h:309 [inline] flush_tlb_mm_range+0x179/0x320 arch/x86/mm/tlb.c:728 flush_tlb_page arch/x86/include/asm/tlbflush.h:576 [inline] ptep_clear_flush+0x123/0x160 mm/pgtable-generic.c:87 page_mkclean_one+0x425/0x860 mm/rmap.c:912 rmap_walk_file+0x539/0xb10 mm/rmap.c:1897 rmap_walk+0x105/0x190 mm/rmap.c:1915 page_mkclean+0x20f/0x2b0 mm/rmap.c:981 clear_page_dirty_for_io+0x305/0xee0 mm/page-writeback.c:2687 mpage_submit_page+0x80/0x250 fs/ext4/inode.c:2215 mpage_process_page_bufs+0x534/0x630 fs/ext4/inode.c:2345 mpage_prepare_extent_to_map+0x9a2/0xf10 fs/ext4/inode.c:2707 ext4_writepages+0x111d/0x37f0 fs/ext4/inode.c:2835 do_writepages+0xe5/0x290 mm/page-writeback.c:2344 __writeback_single_inode+0x10c/0x11d0 fs/fs-writeback.c:1385 writeback_sb_inodes+0x537/0xef0 fs/fs-writeback.c:1647 __writeback_inodes_wb+0xc6/0x280 fs/fs-writeback.c:1716 wb_writeback+0x841/0xcc0 fs/fs-writeback.c:1822 wb_check_old_data_flush fs/fs-writeback.c:1924 [inline] wb_do_writeback fs/fs-writeback.c:1977 [inline] wb_workfn+0x8ba/0x1250 fs/fs-writeback.c:2006 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 ---------------- Code disassembly (best guess): 0: 48 c7 c0 c8 82 f1 89 mov $0xffffffff89f182c8,%rax 7: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx e: fc ff df 11: 48 c1 e8 03 shr $0x3,%rax 15: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) 19: 75 2f jne 0x4a 1b: 48 83 3d dc 65 d8 01 cmpq $0x0,0x1d865dc(%rip) # 0x1d865ff 22: 00 23: 74 15 je 0x3a 25: 48 89 df mov %rbx,%rdi 28: 57 push %rdi 29: 9d popfq * 2a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction 2f: eb b2 jmp 0xffffffe3 31: e8 1b 20 e7 f8 callq 0xf8e72051 36: eb c0 jmp 0xfffffff8 38: 0f 0b ud2 3a: 0f 0b ud2 3c: 48 rex.W 3d: c7 .byte 0xc7 3e: c7 (bad) 3f: c8 .byte 0xc8