kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access[  679.215876] BUG: spinlock bad magic on CPU#0, syz-executor5/20248
 lock: 0xffff8801d4e88018, .magic: dead4eac, .owner: <none>/-1, .owner_cpu: -1
CPU: 0 PID: 20248 Comm: syz-executor5 Not tainted 4.4.125-g38f41ec #63
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 94d92f313ba3c24d ffff8801db2078d8 ffffffff81d067bd
 ffff8801d4e88018 ffff88018f2bc800 0000000000000001 0000000000000001
 0000000000000000 ffff8801db207918 ffffffff81246f8d 0000000000000000
Call Trace:
 <IRQ>  [<ffffffff81d067bd>] __dump_stack lib/dump_stack.c:15 [inline]
 <IRQ>  [<ffffffff81d067bd>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81246f8d>] spin_dump+0x14d/0x280 kernel/locking/spinlock_debug.c:67
 [<ffffffff81247378>] spin_bug kernel/locking/spinlock_debug.c:75 [inline]
 [<ffffffff81247378>] debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline]
 [<ffffffff81247378>] do_raw_spin_lock+0x228/0x2c0 kernel/locking/spinlock_debug.c:135
 [<ffffffff83779546>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline]
 [<ffffffff83779546>] _raw_spin_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:159
 [<ffffffff8121fcce>] __wake_up+0x1e/0x50 kernel/sched/wait.c:94
 [<ffffffff825be9dc>] sg_rq_end_io+0x5dc/0xbc0 drivers/scsi/sg.c:1389
 [<ffffffff81c9b584>] __blk_mq_end_request+0x54/0xc0 block/blk-mq.c:311
 [<ffffffff82526615>] scsi_end_request+0x135/0x5b0 drivers/scsi/scsi_lib.c:716
 [<ffffffff8252f863>] scsi_io_completion+0x15c3/0x1710 drivers/scsi/scsi_lib.c:918
 [<ffffffff82512d9f>] scsi_finish_command+0x3af/0x520 drivers/scsi/scsi.c:607
 [<ffffffff8252cf60>] scsi_softirq_done+0x250/0x350 drivers/scsi/scsi_lib.c:1654
 [<ffffffff81c9d7e5>] blk_mq_ipi_complete_request block/blk-mq.c:356 [inline]
 [<ffffffff81c9d7e5>] __blk_mq_complete_request+0x205/0x500 block/blk-mq.c:368
 [<ffffffff81c9db3b>] blk_mq_complete_request+0x5b/0x70 block/blk-mq.c:387
 [<ffffffff82529c3b>] scsi_mq_done+0xfb/0x3c0 drivers/scsi/scsi_lib.c:1964
 [<ffffffff82552b5f>] virtscsi_complete_cmd+0x5cf/0x7f0 drivers/scsi/virtio_scsi.c:211
 [<ffffffff82550879>] virtscsi_vq_done+0xc9/0x170 drivers/scsi/virtio_scsi.c:229
 [<ffffffff825509c7>] virtscsi_req_done+0xa7/0xd0 drivers/scsi/virtio_scsi.c:244
 [<ffffffff81f2f3c9>] vring_interrupt+0x109/0x150 drivers/virtio/virtio_ring.c:722
 [<ffffffff8126e751>] handle_irq_event_percpu+0xf1/0x960 kernel/irq/handle.c:146
 [<ffffffff8126f067>] handle_irq_event+0xa7/0x140 kernel/irq/handle.c:194
 [<ffffffff81278e6a>] handle_edge_irq+0x1fa/0x8e0 kernel/irq/chip.c:623
 [<ffffffff810168e0>] generic_handle_irq_desc include/linux/irqdesc.h:140 [inline]
 [<ffffffff810168e0>] handle_irq+0x250/0x3a0 arch/x86/kernel/irq_64.c:78
 [<ffffffff8377c3d9>] do_IRQ+0x89/0x1b0 arch/x86/kernel/irq.c:239
 [<ffffffff8377a4e0>] common_interrupt+0xa0/0xa0 arch/x86/entry/entry_64.S:596
 <EOI>  [<ffffffff83778ebe>] ? arch_local_irq_enable arch/x86/include/asm/paravirt.h:822 [inline]
 <EOI>  [<ffffffff83778ebe>] ? __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:170 [inline]
 <EOI>  [<ffffffff83778ebe>] ? _raw_spin_unlock_irq+0x2e/0x50 kernel/locking/spinlock.c:199
 [<ffffffff811a45f7>] finish_lock_switch kernel/sched/sched.h:1177 [inline]
 [<ffffffff811a45f7>] finish_task_switch+0x1e7/0x660 kernel/sched/core.c:2682
 [<ffffffff8376a542>] context_switch kernel/sched/core.c:2811 [inline]
 [<ffffffff8376a542>] __schedule+0xcb2/0x1da0 kernel/sched/core.c:3330
 [<ffffffff8376b82a>] schedule+0x7a/0x1b0 kernel/sched/core.c:3359
 [<ffffffff812dbe87>] freezable_schedule include/linux/freezer.h:171 [inline]
 [<ffffffff812dbe87>] futex_wait_queue_me+0x307/0x5d0 kernel/futex.c:2205
 [<ffffffff812dc9bf>] futex_wait+0x20f/0x610 kernel/futex.c:2320
 [<ffffffff812e18c7>] do_futex+0x7c7/0x15d0 kernel/futex.c:3102
 [<ffffffff812e28d8>] SYSC_futex kernel/futex.c:3162 [inline]
 [<ffffffff812e28d8>] SyS_futex+0x208/0x2c0 kernel/futex.c:3130
 [<ffffffff83779965>] entry_SYSCALL_64_fastpath+0x22/0x9e
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 20262 Comm: syz-executor1 Not tainted 4.4.125-g38f41ec #63
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801cffe1800 task.stack: ffff8801d8ba0000
RIP: 0010:[<ffffffff81435041>]  [<ffffffff81435041>] __read_once_size include/linux/compiler.h:218 [inline]
RIP: 0010:[<ffffffff81435041>]  [<ffffffff81435041>] atomic_read arch/x86/include/asm/atomic.h:27 [inline]
RIP: 0010:[<ffffffff81435041>]  [<ffffffff81435041>] put_page_testzero include/linux/mm.h:357 [inline]
RIP: 0010:[<ffffffff81435041>]  [<ffffffff81435041>] __free_pages+0x21/0x90 mm/page_alloc.c:3365
RSP: 0018:ffff8801d8ba79e8  EFLAGS: 00010a07
RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825bb1fb
RDX: 1bd5a9d5a0000003 RSI: 0000000000000006 RDI: dead4ead0000001c
RBP: ffff8801d8ba79f8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
R13: 0000000000000020 R14: ffff88007d620000 R15: dffffc0000000000
FS:  00007fa51e259700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020929000 CR3: 00000001d9384000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000000 ffff88007d620158 ffff8801d8ba7a58 ffffffff825bb221
 ffff88007d620170 ffffed000fac402b ffffed000fac402e ffff88007d620168
 dead4ead00000000 ffff88007d620140 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff825bb221>] sg_remove_scat.isra.17+0x1c1/0x2d0 drivers/scsi/sg.c:1956
 [<ffffffff825bb5d6>] sg_finish_rem_req+0x2a6/0x320 drivers/scsi/sg.c:1839
 [<ffffffff825bb68c>] sg_new_read+0x3c/0x420 drivers/scsi/sg.c:578
 [<ffffffff825bd35f>] sg_read+0x8cf/0x14d0 drivers/scsi/sg.c:466
 [<ffffffff8151e141>] do_loop_readv_writev+0x141/0x1e0 fs/read_write.c:680
 [<ffffffff8152049d>] do_readv_writev+0x5dd/0x6e0 fs/read_write.c:810
 [<ffffffff81520618>] vfs_readv+0x78/0xb0 fs/read_write.c:834
 [<ffffffff81522949>] SYSC_readv fs/read_write.c:860 [inline]
 [<ffffffff81522949>] SyS_readv+0xd9/0x240 fs/read_write.c:852
 [<ffffffff83779965>] entry_SYSCALL_64_fastpath+0x22/0x9e
Code: c6 a0 0c 00 e9 78 fd ff ff 90 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 49 
RIP  [<ffffffff81435041>] __read_once_size include/linux/compiler.h:218 [inline]
RIP  [<ffffffff81435041>] atomic_read arch/x86/include/asm/atomic.h:27 [inline]
RIP  [<ffffffff81435041>] put_page_testzero include/linux/mm.h:357 [inline]
RIP  [<ffffffff81435041>] __free_pages+0x21/0x90 mm/page_alloc.c:3365
 RSP <ffff8801d8ba79e8>
---[ end trace a15da564e644e248 ]---