kasan: CONFIG_KASAN_INLINE enabled
BUG: spinlock bad magic on CPU#0, syz-executor6/15691
 lock: 0xffff8801cea18018, .magic: dead4eac, .owner: <none>/-1, .owner_cpu: -1
CPU: 0 PID: 15691 Comm: syz-executor6 Not tainted 4.9.65-g5311c74 #100
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801a95275c8 ffffffff81d904c9 ffff8801cea18018 ffff8801d10e8000
 0000000000000002 ffff8801cea18018 0000000000080000 ffff8801a9527608
 ffffffff8124601d ffffffff8122166f 0000000000000000 ffffffff00000000
Call Trace:
 [<ffffffff81d904c9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d904c9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8124601d>] spin_dump+0x14d/0x280 kernel/locking/spinlock_debug.c:67
 [<ffffffff81246354>] spin_bug kernel/locking/spinlock_debug.c:75 [inline]
 [<ffffffff81246354>] debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline]
 [<ffffffff81246354>] do_raw_spin_lock+0x174/0x1e0 kernel/locking/spinlock_debug.c:112
 [<ffffffff838a95c6>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline]
 [<ffffffff838a95c6>] _raw_spin_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:159
 [<ffffffff8122166f>] add_wait_queue+0x3f/0xa0 kernel/sched/wait.c:28
 [<ffffffff815ad101>] __pollwait+0x2b1/0x400 fs/select.c:232
 [<ffffffff8265da0b>] poll_wait include/linux/poll.h:45 [inline]
 [<ffffffff8265da0b>] sg_poll+0xcb/0x340 drivers/scsi/sg.c:1170
 [<ffffffff815aeac3>] do_select+0xa23/0x13b0 fs/select.c:465
 [<ffffffff815af868>] core_sys_select+0x418/0x730 fs/select.c:611
 [<ffffffff815b000e>] do_pselect fs/select.c:688 [inline]
 [<ffffffff815b000e>] SYSC_pselect6 fs/select.c:729 [inline]
 [<ffffffff815b000e>] SyS_pselect6+0x2ae/0x550 fs/select.c:714
 [<ffffffff838a9745>] entry_SYSCALL_64_fastpath+0x23/0xc6
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 15682 Comm: syz-executor4 Not tainted 4.9.65-g5311c74 #100
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801a8abc800 task.stack: ffff8801d8f78000
RIP: 0010:[<ffffffff8144bd41>]  [<ffffffff8144bd41>] __read_once_size include/linux/compiler.h:243 [inline]
RIP: 0010:[<ffffffff8144bd41>]  [<ffffffff8144bd41>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP: 0010:[<ffffffff8144bd41>]  [<ffffffff8144bd41>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP: 0010:[<ffffffff8144bd41>]  [<ffffffff8144bd41>] put_page_testzero include/linux/mm.h:449 [inline]
RIP: 0010:[<ffffffff8144bd41>]  [<ffffffff8144bd41>] __free_pages+0x21/0x80 mm/page_alloc.c:3910
RSP: 0018:ffff8801d8f7f9b0  EFLAGS: 00010a07
RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffc90002e0e000
RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
RBP: ffff8801d8f7f9c0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
R13: 0000000000000020 R14: ffff8801c46c2100 R15: dffffc0000000000
FS:  00007f3fd73fe700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000960008 CR3: 00000001c7702000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801a8abc800 ffff8801c46c2258 ffff8801d8f7fa20 ffffffff8265f631
 ffff8801c46c2270 ffffed00388d844b ffffed00388d844e ffff8801c46c2268
 dead4ead00000000 ffff8801c46c2240 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff8265f631>] sg_remove_scat.isra.20+0x1c1/0x2d0 drivers/scsi/sg.c:1954
 [<ffffffff8265f9f5>] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1836
 [<ffffffff8265fab9>] sg_new_read.isra.21+0x39/0x3e0 drivers/scsi/sg.c:567
 [<ffffffff826616ad>] sg_read+0x8bd/0x1440 drivers/scsi/sg.c:456
 [<ffffffff81568e21>] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714
 [<ffffffff8156cc90>] do_loop_readv_writev fs/read_write.c:880 [inline]
 [<ffffffff8156cc90>] do_readv_writev+0x520/0x750 fs/read_write.c:874
 [<ffffffff8156cf44>] vfs_readv+0x84/0xc0 fs/read_write.c:898
 [<ffffffff8156d066>] do_readv+0xe6/0x250 fs/read_write.c:924
 [<ffffffff81570557>] SYSC_readv fs/read_write.c:1011 [inline]
 [<ffffffff81570557>] SyS_readv+0x27/0x30 fs/read_write.c:1008
 [<ffffffff838a9745>] entry_SYSCALL_64_fastpath+0x23/0xc6
Code: ff 66 0f 1f 84 00 00 00 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  [<ffffffff8144bd41>] __read_once_size include/linux/compiler.h:243 [inline]
RIP  [<ffffffff8144bd41>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP  [<ffffffff8144bd41>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP  [<ffffffff8144bd41>] put_page_testzero include/linux/mm.h:449 [inline]
RIP  [<ffffffff8144bd41>] __free_pages+0x21/0x80 mm/page_alloc.c:3910
 RSP <ffff8801d8f7f9b0>
---[ end trace 07dc123dfc1f0c49 ]---