------------[ cut here ]------------ FAT-fs (loop6): bogus number of reserved sectors FAT-fs (loop6): Can't find a valid FAT filesystem FAT-fs (loop0): bogus number of reserved sectors FAT-fs (loop0): Can't find a valid FAT filesystem WARNING: CPU: 1 PID: 4441 at kernel/locking/mutex.c:873 __mutex_trylock_slowpath kernel/locking/mutex.c:873 [inline] WARNING: CPU: 1 PID: 4441 at kernel/locking/mutex.c:873 mutex_trylock+0x2f9/0x3e0 kernel/locking/mutex.c:908 DEBUG_LOCKS_WARN_ON(in_interrupt())[ 500.020915] Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 4441 Comm: syz-executor3 Not tainted 4.9.116-g52be322 #17 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801db3077f8 ffffffff81eb46a9 ffffffff83c48980 00000000ffffffff 0000000000000000 0000000000000001 0000000000000369 ffff8801db3078b8 ffffffff81421a75 0000000041b58ab3 ffffffff843bbff8 ffffffff814218b6 Call Trace: [ 500.073995] [] __dump_stack lib/dump_stack.c:15 [inline] [ 500.073995] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] panic+0x1bf/0x3bc kernel/panic.c:179 [] __warn.cold.9+0xc1/0x17f kernel/panic.c:542 [] warn_slowpath_fmt+0xc2/0x100 kernel/panic.c:565 [] __mutex_trylock_slowpath kernel/locking/mutex.c:873 [inline] [] mutex_trylock+0x2f9/0x3e0 kernel/locking/mutex.c:908 [] exp_funnel_lock kernel/rcu/tree_exp.h:256 [inline] [] _synchronize_rcu_expedited+0x339/0x840 kernel/rcu/tree_exp.h:569 [] synchronize_rcu_expedited kernel/rcu/tree_exp.h:687 [inline] [] synchronize_rcu.part.62+0xd3/0x110 kernel/rcu/tree_plugin.h:682 [] synchronize_rcu+0x27/0x90 kernel/rcu/tree_plugin.h:685 [] __l2tp_session_unhash+0x38a/0x520 net/l2tp/l2tp_core.c:1796 [] l2tp_tunnel_closeall+0x1f7/0x350 net/l2tp/l2tp_core.c:1364 [] l2tp_tunnel_destruct+0x2f2/0x590 net/l2tp/l2tp_core.c:1324 [] __sk_destruct+0x55/0x590 net/core/sock.c:1428 [] __rcu_reclaim kernel/rcu/rcu.h:118 [inline] [] rcu_do_batch kernel/rcu/tree.c:2789 [inline] [] invoke_rcu_callbacks kernel/rcu/tree.c:3053 [inline] [] __rcu_process_callbacks kernel/rcu/tree.c:3020 [inline] [] rcu_process_callbacks+0x8ae/0x12b0 kernel/rcu/tree.c:3037 [] __do_softirq+0x20b/0x937 kernel/softirq.c:284 [] invoke_softirq kernel/softirq.c:364 [inline] [] irq_exit+0x147/0x190 kernel/softirq.c:405 [] exiting_irq arch/x86/include/asm/apic.h:659 [inline] [] smp_apic_timer_interrupt+0x81/0xa0 arch/x86/kernel/apic/apic.c:960 [] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:648 [ 500.348262] [] ? __tlb_adjust_range include/asm-generic/tlb.h:130 [inline] [ 500.348262] [] ? zap_pte_range mm/memory.c:1151 [inline] [ 500.348262] [] ? zap_pmd_range mm/memory.c:1258 [inline] [ 500.348262] [] ? zap_pud_range mm/memory.c:1279 [inline] [ 500.348262] [] ? unmap_page_range+0xb35/0x1730 mm/memory.c:1300 [] unmap_single_vma+0x101/0x260 mm/memory.c:1345 [] unmap_vmas+0x102/0x1d0 mm/memory.c:1375 [] exit_mmap+0x214/0x3f0 mm/mmap.c:3020 [] __mmput kernel/fork.c:881 [inline] [] mmput+0xf3/0x2d0 kernel/fork.c:903 [] exit_mm kernel/exit.c:514 [inline] [] do_exit+0x906/0x27b0 kernel/exit.c:820 [] do_group_exit+0x111/0x340 kernel/exit.c:937 [] get_signal+0x4cf/0x1450 kernel/signal.c:2321 [] do_signal+0x87/0x19f0 arch/x86/kernel/signal.c:807 [] exit_to_usermode_loop+0xe1/0x120 arch/x86/entry/common.c:157 [] prepare_exit_to_usermode arch/x86/entry/common.c:191 [inline] [] syscall_return_slowpath arch/x86/entry/common.c:260 [inline] [] do_syscall_64+0x364/0x490 arch/x86/entry/common.c:287 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..