kasan: CONFIG_KASAN_INLINE enabled
BUG: spinlock bad magic on CPU#1, syz-executor4/6657
 lock: 0xffff8801d3852118, .magic: dead4eac, .owner: <none>/-1, .owner_cpu: -1
CPU: 1 PID: 6657 Comm: syz-executor4 Not tainted 4.9.83-ga92bb8d #51
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d30f77e0 ffffffff81d95149 ffff8801d3852118 ffff8801d30b4800
 0000000000000018 ffff8801d3852118 ffffffff82666b20 ffff8801d30f7820
 ffffffff81248aad ffffffff812240ff ffff880100000000 ffffed0000000000
Call Trace:
 [<ffffffff81d95149>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d95149>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81248aad>] spin_dump+0x14d/0x280 kernel/locking/spinlock_debug.c:67
 [<ffffffff81248de4>] spin_bug kernel/locking/spinlock_debug.c:75 [inline]
 [<ffffffff81248de4>] debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline]
 [<ffffffff81248de4>] do_raw_spin_lock+0x174/0x1e0 kernel/locking/spinlock_debug.c:112
 [<ffffffff838b4cf6>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline]
 [<ffffffff838b4cf6>] _raw_spin_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:159
 [<ffffffff812240ff>] add_wait_queue+0x3f/0xa0 kernel/sched/wait.c:28
 [<ffffffff815b12f1>] __pollwait+0x2b1/0x400 fs/select.c:232
 [<ffffffff82666beb>] poll_wait include/linux/poll.h:45 [inline]
 [<ffffffff82666beb>] sg_poll+0xcb/0x340 drivers/scsi/sg.c:1159
 [<ffffffff815b49dd>] do_pollfd fs/select.c:781 [inline]
 [<ffffffff815b49dd>] do_poll fs/select.c:831 [inline]
 [<ffffffff815b49dd>] do_sys_poll+0x53d/0xcb0 fs/select.c:925
 [<ffffffff815b5480>] SYSC_poll fs/select.c:983 [inline]
 [<ffffffff815b5480>] SyS_poll+0x120/0x3f0 fs/select.c:971
 [<ffffffff81006f95>] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 [<ffffffff81006f95>] do_fast_syscall_32+0x2f5/0x870 arch/x86/entry/common.c:387
 [<ffffffff838b6590>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137
kasan: CONFIG_KASAN_INLINE enabled
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: 6670 Comm: syz-executor7 Not tainted 4.9.83-ga92bb8d #51
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d415c800 task.stack: ffff8801b0fb0000
RIP: 0010:[<ffffffff8144f001>]  [<ffffffff8144f001>] __read_once_size include/linux/compiler.h:243 [inline]
RIP: 0010:[<ffffffff8144f001>]  [<ffffffff8144f001>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP: 0010:[<ffffffff8144f001>]  [<ffffffff8144f001>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP: 0010:[<ffffffff8144f001>]  [<ffffffff8144f001>] put_page_testzero include/linux/mm.h:450 [inline]
RIP: 0010:[<ffffffff8144f001>]  [<ffffffff8144f001>] __free_pages+0x21/0x80 mm/page_alloc.c:3897
RSP: 0018:ffff8801b0fb7a50  EFLAGS: 00010a07
RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff826687fb
RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
RBP: ffff8801b0fb7a60 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: ffff8801d415c800 R12: 0000000000000004
R13: 0000000000000020 R14: ffff8801d3854200 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f6f85b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f6fa5c10 CR3: 00000001b9fde000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000001 ffff8801d3854358 ffff8801b0fb7ac0 ffffffff82668821
 ffff8801d3854370 ffffed003a70a86b ffffed003a70a86e ffff8801d3854368
 dead4ead00000000 ffff8801d3854340 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff82668821>] sg_remove_scat.isra.19+0x1c1/0x2d0 drivers/scsi/sg.c:1944
 [<ffffffff82668be5>] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1825
 [<ffffffff82668fc6>] sg_new_read.isra.20+0x356/0x3e0 drivers/scsi/sg.c:566
 [<ffffffff8266a917>] sg_read+0x8b7/0x1440 drivers/scsi/sg.c:455
 [<ffffffff8156c1c3>] __vfs_read+0x103/0x670 fs/read_write.c:452
 [<ffffffff8156ff5e>] vfs_read+0x11e/0x380 fs/read_write.c:475
 [<ffffffff81573c89>] SYSC_read fs/read_write.c:591 [inline]
 [<ffffffff81573c89>] SyS_read+0xd9/0x1b0 fs/read_write.c:584
 [<ffffffff81006f95>] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 [<ffffffff81006f95>] do_fast_syscall_32+0x2f5/0x870 arch/x86/entry/common.c:387
 [<ffffffff838b6590>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137
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  [<ffffffff8144f001>] __read_once_size include/linux/compiler.h:243 [inline]
RIP  [<ffffffff8144f001>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP  [<ffffffff8144f001>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP  [<ffffffff8144f001>] put_page_testzero include/linux/mm.h:450 [inline]
RIP  [<ffffffff8144f001>] __free_pages+0x21/0x80 mm/page_alloc.c:3897
 RSP <ffff8801b0fb7a50>
---[ end trace e3cdc3e4fae915f5 ]---