GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.1:27064] Modules linked in: irq event stamp: 3238352 hardirqs last enabled at (3238351): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (3238352): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (15640): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (14415): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (14415): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 27064 Comm: syz-executor.1 Not tainted 4.19.189-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:435 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x3a6/0xae0 kernel/locking/qspinlock.c:474 Code: eb c6 45 01 01 41 bc 00 80 00 00 48 c1 e9 03 83 e3 07 41 be 01 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8d 2c 01 eb 0c f3 90 <41> 83 ec 01 0f 84 38 04 00 00 41 0f b6 45 00 38 d8 7f 08 84 c0 0f RSP: 0018:ffff888065907830 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000003 RBX: 0000000000000000 RCX: 1ffffffff1404194 RDX: 0000000000000001 RSI: ffffffff81678725 RDI: 0000000000000282 RBP: ffffffff8a020ca0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000007d61 R13: fffffbfff1404194 R14: 0000000000000001 R15: ffff8880ba02bd80 FS: 00007f34894ef700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000026f4848 CR3: 00000000a0a24000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:679 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:53 [inline] queued_spin_lock include/asm-generic/qspinlock.h:88 [inline] do_raw_spin_lock+0x189/0x220 kernel/locking/spinlock_debug.c:113 spin_lock include/linux/spinlock.h:329 [inline] prep_new_huge_page+0x8f/0x3d0 mm/hugetlb.c:1322 alloc_fresh_huge_page+0x441/0xa80 mm/hugetlb.c:1441 alloc_surplus_huge_page+0x124/0x4e0 mm/hugetlb.c:1622 gather_surplus_pages mm/hugetlb.c:1775 [inline] hugetlb_acct_memory+0x1e7/0xba0 mm/hugetlb.c:3153 hugetlb_reserve_pages+0x47f/0x650 mm/hugetlb.c:4581 hugetlbfs_file_mmap+0x2e4/0x4a0 fs/hugetlbfs/inode.c:164 call_mmap include/linux/fs.h:1826 [inline] mmap_region+0xc94/0x16b0 mm/mmap.c:1757 do_mmap+0x8e8/0x1080 mm/mmap.c:1530 do_mmap_pgoff include/linux/mm.h:2326 [inline] vm_mmap_pgoff+0x197/0x200 mm/util.c:357 ksys_mmap_pgoff+0x42e/0x5a0 mm/mmap.c:1580 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665f9 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:00007f34894ef188 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 0000000000e7e000 RDI: 0000000020000000 RBP: 00000000004bfce1 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000040031 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffca7a8e0ff R14: 00007f34894ef300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 27061 Comm: syz-executor.2 Not tainted 4.19.189-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:784 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:806 [inline] RIP: 0010:__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] RIP: 0010:_raw_spin_lock_irqsave+0x2c/0xc0 kernel/locking/spinlock.c:152 Code: c0 40 82 f1 89 41 54 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 55 48 89 fd 80 3c 10 00 75 7f 48 83 3d a7 8c d9 01 00 74 71 9c <58> 0f 1f 44 00 00 48 ba 00 00 00 00 00 fc ff df 49 89 c4 48 c7 c0 RSP: 0018:ffff8880ba107690 EFLAGS: 00000082 RAX: 1ffffffff13e3048 RBX: 0000000000000000 RCX: ffffffff815422ad RDX: dffffc0000000000 RSI: ffffffff815422ba RDI: ffff8880ba124c80 RBP: ffff8880ba124c80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: ffffffff8c66305b R12: ffff88809db27808 R13: ffff8880ba124cc4 R14: ffff8880ba124c80 R15: 0000000000000000 FS: 00007f0fdc1b0700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004e4dc0 CR3: 0000000068917000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: