kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
BUG: spinlock bad magic on CPU#1, syz-executor0/20723
 lock: 0xffff8801bfb28018, .magic: dead4eac, .owner: <none>/-1, .owner_cpu: -1
CPU: 1 PID: 20723 Comm: syz-executor0 Not tainted 4.9.81-g1a93831 #33
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801db307898 ffffffff81d94e69 ffff8801bfb28018 ffff8801b62e4800
 0000000000000001 0000000000000001 0000000000000000 ffff8801db3078d8
 ffffffff812489fd ffffffff81223d3e 0000000000000000 0000000000000000
Call Trace:
 <IRQ> 
 [<ffffffff81d94e69>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d94e69>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff812489fd>] spin_dump+0x14d/0x280 kernel/locking/spinlock_debug.c:67
 [<ffffffff81248d34>] spin_bug kernel/locking/spinlock_debug.c:75 [inline]
 [<ffffffff81248d34>] debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline]
 [<ffffffff81248d34>] do_raw_spin_lock+0x174/0x1e0 kernel/locking/spinlock_debug.c:112
 [<ffffffff838b3c46>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline]
 [<ffffffff838b3c46>] _raw_spin_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:159
 [<ffffffff81223d3e>] __wake_up+0x1e/0x50 kernel/sched/wait.c:94
 [<ffffffff8266c29c>] sg_rq_end_io+0x5dc/0xbc0 drivers/scsi/sg.c:1375
 [<ffffffff81d24574>] __blk_mq_end_request+0x54/0xc0 block/blk-mq.c:331
 [<ffffffff825d1815>] scsi_end_request+0x135/0x5c0 drivers/scsi/scsi_lib.c:627
 [<ffffffff825db44e>] scsi_io_completion+0x15de/0x1730 drivers/scsi/scsi_lib.c:829
 [<ffffffff825bde78>] scsi_finish_command+0x3b8/0x530 drivers/scsi/scsi.c:607
 [<ffffffff825d8b20>] scsi_softirq_done+0x250/0x350 drivers/scsi/scsi_lib.c:1567
 [<ffffffff81d26195>] blk_mq_ipi_complete_request block/blk-mq.c:376 [inline]
 [<ffffffff81d26195>] __blk_mq_complete_request+0x205/0x4b0 block/blk-mq.c:388
 [<ffffffff81d264a5>] blk_mq_complete_request+0x65/0x80 block/blk-mq.c:407
 [<ffffffff825d4c6e>] scsi_mq_done+0xce/0x320 drivers/scsi/scsi_lib.c:1877
 [<ffffffff825ff51f>] virtscsi_complete_cmd+0x5cf/0x7f0 drivers/scsi/virtio_scsi.c:211
 [<ffffffff825fd1d9>] virtscsi_vq_done+0xc9/0x170 drivers/scsi/virtio_scsi.c:229
 [<ffffffff825fd327>] virtscsi_req_done+0xa7/0xd0 drivers/scsi/virtio_scsi.c:244
 [<ffffffff81fe1999>] vring_interrupt+0x109/0x150 drivers/virtio/virtio_ring.c:909
 [<ffffffff8126e0cf>] __handle_irq_event_percpu+0xef/0x800 kernel/irq/handle.c:145
 [<ffffffff8126e854>] handle_irq_event_percpu+0x74/0x150 kernel/irq/handle.c:185
 [<ffffffff8126e9d7>] handle_irq_event+0xa7/0x140 kernel/irq/handle.c:202
 [<ffffffff8127904a>] handle_edge_irq+0x1fa/0x8e0 kernel/irq/chip.c:665
 [<ffffffff8105a5ce>] generic_handle_irq_desc include/linux/irqdesc.h:150 [inline]
 [<ffffffff8105a5ce>] handle_irq+0x24e/0x3b0 arch/x86/kernel/irq_64.c:76
 [<ffffffff838b65e9>] do_IRQ+0x89/0x1b0 arch/x86/kernel/irq.c:239
 [<ffffffff838b46a0>] common_interrupt+0xa0/0xa0 arch/x86/entry/entry_64.S:449
 <EOI> 
 [<ffffffff81dfc2c6>] check_preemption_disabled+0x36/0x200 lib/smp_processor_id.c:15
 [<ffffffff81dfc4ac>] debug_smp_processor_id+0x1c/0x20 lib/smp_processor_id.c:56
 [<ffffffff8128fd07>] rcu_lockdep_current_cpu_online+0x37/0x140 kernel/rcu/tree.c:1105
 [<ffffffff8128780a>] rcu_read_lock_sched_held+0x9a/0x120 kernel/rcu/update.c:109
 [<ffffffff815399ef>] trace_kmalloc include/trace/events/kmem.h:45 [inline]
 [<ffffffff815399ef>] __kmalloc+0x28f/0x310 mm/slub.c:3739
 [<ffffffff81612d53>] kmalloc_array include/linux/slab.h:582 [inline]
 [<ffffffff81612d53>] kcalloc include/linux/slab.h:593 [inline]
 [<ffffffff81612d53>] iter_file_splice_write+0x143/0xb60 fs/splice.c:711
 [<ffffffff8160e005>] do_splice_from fs/splice.c:870 [inline]
 [<ffffffff8160e005>] direct_splice_actor+0x125/0x180 fs/splice.c:1037
 [<ffffffff8160f5cc>] splice_direct_to_actor+0x2cc/0x800 fs/splice.c:992
 [<ffffffff8160fca7>] do_splice_direct+0x1a7/0x270 fs/splice.c:1080
 [<ffffffff81572c5b>] do_sendfile+0x54b/0xd30 fs/read_write.c:1401
 [<ffffffff81574bb1>] SYSC_sendfile64 fs/read_write.c:1456 [inline]
 [<ffffffff81574bb1>] SyS_sendfile64+0xd1/0x160 fs/read_write.c:1448
 [<ffffffff81006505>] do_syscall_64+0x1a5/0x490 arch/x86/entry/common.c:282
 [<ffffffff838b3dbd>] entry_SYSCALL_64_after_swapgs+0x47/0xc5
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 20732 Comm: syz-executor2 Not tainted 4.9.81-g1a93831 #33
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801b69c1800 task.stack: ffff8801b5870000
RIP: 0010:[<ffffffff8144efd1>]  [<ffffffff8144efd1>] __read_once_size include/linux/compiler.h:243 [inline]
RIP: 0010:[<ffffffff8144efd1>]  [<ffffffff8144efd1>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP: 0010:[<ffffffff8144efd1>]  [<ffffffff8144efd1>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP: 0010:[<ffffffff8144efd1>]  [<ffffffff8144efd1>] put_page_testzero include/linux/mm.h:450 [inline]
RIP: 0010:[<ffffffff8144efd1>]  [<ffffffff8144efd1>] __free_pages+0x21/0x80 mm/page_alloc.c:3897
RSP: 0018:ffff8801b5877950  EFLAGS: 00010a07
RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff8266848b
RDX: 1bd5a9d5a0000003 RSI: 0000000000000006 RDI: dead4ead0000001c
RBP: ffff8801b5877960 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
R13: 0000000000000020 R14: ffff8801cb200000 R15: dffffc0000000000
FS:  00007febd5c42700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000920008 CR3: 00000001c591e000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801b69c1800 ffff8801cb200158 ffff8801b58779c0 ffffffff826684b1
 ffff8801cb200170 ffffed003964002b ffffed003964002e ffff8801cb200168
 dead4ead00000000 ffff8801cb200140 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff826684b1>] sg_remove_scat.isra.19+0x1c1/0x2d0 drivers/scsi/sg.c:1944
 [<ffffffff82668875>] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1825
 [<ffffffff82668939>] sg_new_read.isra.20+0x39/0x3e0 drivers/scsi/sg.c:566
 [<ffffffff8266a5a7>] sg_read+0x8b7/0x1440 drivers/scsi/sg.c:455
 [<ffffffff8156cd71>] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714
 [<ffffffff81570be0>] do_loop_readv_writev fs/read_write.c:880 [inline]
 [<ffffffff81570be0>] do_readv_writev+0x520/0x750 fs/read_write.c:874
 [<ffffffff81570e94>] vfs_readv+0x84/0xc0 fs/read_write.c:898
 [<ffffffff81570fb6>] do_readv+0xe6/0x250 fs/read_write.c:924
 [<ffffffff815744a7>] SYSC_readv fs/read_write.c:1011 [inline]
 [<ffffffff815744a7>] SyS_readv+0x27/0x30 fs/read_write.c:1008
 [<ffffffff81006505>] do_syscall_64+0x1a5/0x490 arch/x86/entry/common.c:282
 [<ffffffff838b3dbd>] entry_SYSCALL_64_after_swapgs+0x47/0xc5
Code: e9 27 fc ff ff 0f 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 3d 
RIP  [<ffffffff8144efd1>] __read_once_size include/linux/compiler.h:243 [inline]
RIP  [<ffffffff8144efd1>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP  [<ffffffff8144efd1>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP  [<ffffffff8144efd1>] put_page_testzero include/linux/mm.h:450 [inline]
RIP  [<ffffffff8144efd1>] __free_pages+0x21/0x80 mm/page_alloc.c:3897
 RSP <ffff8801b5877950>
---[ end trace f6466400fbe24203 ]---