kasan: CONFIG_KASAN_INLINE enabled
BUG: spinlock bad magic on CPU#0, syz-executor1/6781
 lock: 0xffff8801c5708018, .magic: dead4eac, .owner: <none>/-1, .owner_cpu: -1
CPU: 0 PID: 6781 Comm: syz-executor1 Not tainted 4.9.72-gcb7518e #114
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801b409f850 ffffffff81d922b9 ffff8801c5708018 ffff8801b441c800
 0000000000002018 ffff8801c5708018 ffffffff826632c0 ffff8801b409f890
 ffffffff81246a9d ffffffff812220ef aef948e900000000 ffff880100000000
Call Trace:
 [<ffffffff81d922b9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d922b9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81246a9d>] spin_dump+0x14d/0x280 kernel/locking/spinlock_debug.c:67
 [<ffffffff81246dd4>] spin_bug kernel/locking/spinlock_debug.c:75 [inline]
 [<ffffffff81246dd4>] debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline]
 [<ffffffff81246dd4>] do_raw_spin_lock+0x174/0x1e0 kernel/locking/spinlock_debug.c:112
 [<ffffffff838af3f6>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline]
 [<ffffffff838af3f6>] _raw_spin_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:159
 [<ffffffff812220ef>] add_wait_queue+0x3f/0xa0 kernel/sched/wait.c:28
 [<ffffffff815ae7d1>] __pollwait+0x2b1/0x400 fs/select.c:232
 [<ffffffff8266338b>] poll_wait include/linux/poll.h:45 [inline]
 [<ffffffff8266338b>] sg_poll+0xcb/0x340 drivers/scsi/sg.c:1170
 [<ffffffff815b1ebd>] do_pollfd fs/select.c:781 [inline]
 [<ffffffff815b1ebd>] do_poll fs/select.c:831 [inline]
 [<ffffffff815b1ebd>] do_sys_poll+0x53d/0xcb0 fs/select.c:925
 [<ffffffff815b2960>] SYSC_poll fs/select.c:983 [inline]
 [<ffffffff815b2960>] SyS_poll+0x120/0x3f0 fs/select.c:971
 [<ffffffff838af585>] 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: 0 PID: 6785 Comm: syz-executor0 Not tainted 4.9.72-gcb7518e #114
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801c49a9800 task.stack: ffff8801c4f90000
RIP: 0010:[<ffffffff8144d081>]  [<ffffffff8144d081>] __read_once_size include/linux/compiler.h:243 [inline]
RIP: 0010:[<ffffffff8144d081>]  [<ffffffff8144d081>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP: 0010:[<ffffffff8144d081>]  [<ffffffff8144d081>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP: 0010:[<ffffffff8144d081>]  [<ffffffff8144d081>] put_page_testzero include/linux/mm.h:450 [inline]
RIP: 0010:[<ffffffff8144d081>]  [<ffffffff8144d081>] __free_pages+0x21/0x80 mm/page_alloc.c:3903
RSP: 0018:ffff8801c4f979b0  EFLAGS: 00010a07
RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b
RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
RBP: ffff8801c4f979c0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
R13: 0000000000000020 R14: ffff8801c4f6a100 R15: dffffc0000000000
FS:  00007f11436fa700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001d13cd8 CR3: 00000001ccd0c000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801c49a9800 ffff8801c4f6a258 ffff8801c4f97a20 ffffffff82664fc1
 ffff8801c4f6a270 ffffed00389ed44b ffffed00389ed44e ffff8801c4f6a268
 dead4ead00000000 ffff8801c4f6a240 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff82664fc1>] sg_remove_scat.isra.19+0x1c1/0x2d0 drivers/scsi/sg.c:1954
 [<ffffffff82665385>] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1836
 [<ffffffff82665449>] sg_new_read.isra.20+0x39/0x3e0 drivers/scsi/sg.c:567
 [<ffffffff8266703d>] sg_read+0x8bd/0x1440 drivers/scsi/sg.c:456
 [<ffffffff8156a4e1>] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714
 [<ffffffff8156e350>] do_loop_readv_writev fs/read_write.c:880 [inline]
 [<ffffffff8156e350>] do_readv_writev+0x520/0x750 fs/read_write.c:874
 [<ffffffff8156e604>] vfs_readv+0x84/0xc0 fs/read_write.c:898
 [<ffffffff8156e726>] do_readv+0xe6/0x250 fs/read_write.c:924
 [<ffffffff81571c17>] SYSC_readv fs/read_write.c:1011 [inline]
 [<ffffffff81571c17>] SyS_readv+0x27/0x30 fs/read_write.c:1008
 [<ffffffff838af585>] entry_SYSCALL_64_fastpath+0x23/0xc6
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  [<ffffffff8144d081>] __read_once_size include/linux/compiler.h:243 [inline]
RIP  [<ffffffff8144d081>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP  [<ffffffff8144d081>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP  [<ffffffff8144d081>] put_page_testzero include/linux/mm.h:450 [inline]
RIP  [<ffffffff8144d081>] __free_pages+0x21/0x80 mm/page_alloc.c:3903
 RSP <ffff8801c4f979b0>
---[ end trace b4eb463e3702582f ]---