netlink: 12 bytes leftover after parsing attributes in process `syz-executor4'.
netlink: 3 bytes leftover after parsing attributes in process `syz-executor4'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor4'.
netlink: 3 bytes leftover after parsing attributes in process `syz-executor4'.
BUG: spinlock bad magic on CPU#0, syz-executor7/5268
 lock: 0xffff8801b5018018, .magic: dead4eac, .owner: <none>/-1, .owner_cpu: -1
CPU: 0 PID: 5268 Comm: syz-executor7 Not tainted 4.9.87-g97d7f1c #54
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801b5517778 ffffffff81d95a19 ffff8801b5018018 ffff8801b5579800
 dffffc0000000000 ffff8801b5517ab0 ffff8801b5517ae0 ffff8801b55177b8
 ffffffff81248c1d ffffffff81224784 ffff880100000000 0000000000000000
Call Trace:
 [<ffffffff81d95a19>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d95a19>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81248c1d>] spin_dump+0x14d/0x280 kernel/locking/spinlock_debug.c:67
 [<ffffffff81248f54>] spin_bug kernel/locking/spinlock_debug.c:75 [inline]
 [<ffffffff81248f54>] debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline]
 [<ffffffff81248f54>] do_raw_spin_lock+0x174/0x1e0 kernel/locking/spinlock_debug.c:112
 [<ffffffff838b69b6>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline]
 [<ffffffff838b69b6>] _raw_spin_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:159
 [<ffffffff81224784>] remove_wait_queue+0x14/0x40 kernel/sched/wait.c:49
 [<ffffffff815b1792>] free_poll_entry fs/select.c:133 [inline]
 [<ffffffff815b1792>] poll_freewait+0xd2/0x250 fs/select.c:142
 [<ffffffff815b4d37>] do_sys_poll+0x617/0xcb0 fs/select.c:926
 [<ffffffff815b5b9f>] SYSC_ppoll fs/select.c:1034 [inline]
 [<ffffffff815b5b9f>] SyS_ppoll+0x1cf/0x400 fs/select.c:1005
 [<ffffffff81006504>] do_syscall_64+0x1a4/0x490 arch/x86/entry/common.c:282
 [<ffffffff838b6b53>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 5288 Comm: syz-executor7 Not tainted 4.9.87-g97d7f1c #54
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801b117c800 task.stack: ffff8801d8898000
RIP: 0010:[<ffffffff8144f121>]  [<ffffffff8144f121>] __read_once_size include/linux/compiler.h:243 [inline]
RIP: 0010:[<ffffffff8144f121>]  [<ffffffff8144f121>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP: 0010:[<ffffffff8144f121>]  [<ffffffff8144f121>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP: 0010:[<ffffffff8144f121>]  [<ffffffff8144f121>] put_page_testzero include/linux/mm.h:450 [inline]
RIP: 0010:[<ffffffff8144f121>]  [<ffffffff8144f121>] __free_pages+0x21/0x80 mm/page_alloc.c:3897
RSP: 0018:ffff8801d889f940  EFLAGS: 00010a07
RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff826692ab
RDX: 1bd5a9d5a0000003 RSI: 0000000000000006 RDI: dead4ead0000001c
RBP: ffff8801d889f950 R08: 0000000048000000 R09: 0000000000001e30
R10: 0000000000002100 R11: ffff8801b117c800 R12: 0000000000000004
R13: 0000000000000020 R14: ffff8801d4aa4200 R15: dffffc0000000000
FS:  00007fa4dcf9a700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000a3f228 CR3: 00000001cb02e000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000001 ffff8801d4aa4358 ffff8801d889f9b0 ffffffff826692d1
 ffff8801d4aa4370 ffffed003a95486b ffffed003a95486e ffff8801d4aa4368
 dead4ead00000000 ffff8801d4aa4340 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff826692d1>] sg_remove_scat.isra.19+0x1c1/0x2d0 drivers/scsi/sg.c:1944
 [<ffffffff82669695>] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1825
 [<ffffffff826698ad>] sg_new_read.isra.20+0x18d/0x3e0 drivers/scsi/sg.c:566
 [<ffffffff8266b3c7>] sg_read+0x8b7/0x1440 drivers/scsi/sg.c:455
 [<ffffffff8156ce48>] do_loop_readv_writev.part.17+0xc8/0x2b0 fs/read_write.c:715
 [<ffffffff81570f8d>] do_loop_readv_writev fs/read_write.c:879 [inline]
 [<ffffffff81570f8d>] do_readv_writev+0x5fd/0x740 fs/read_write.c:873
 [<ffffffff81571154>] vfs_readv+0x84/0xc0 fs/read_write.c:897
 [<ffffffff81571276>] do_readv+0xe6/0x250 fs/read_write.c:923
 [<ffffffff81574747>] SYSC_readv fs/read_write.c:1010 [inline]
 [<ffffffff81574747>] SyS_readv+0x27/0x30 fs/read_write.c:1007
 [<ffffffff81006504>] do_syscall_64+0x1a4/0x490 arch/x86/entry/common.c:282
 [<ffffffff838b6b53>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
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  [<ffffffff8144f121>] __read_once_size include/linux/compiler.h:243 [inline]
RIP  [<ffffffff8144f121>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP  [<ffffffff8144f121>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP  [<ffffffff8144f121>] put_page_testzero include/linux/mm.h:450 [inline]
RIP  [<ffffffff8144f121>] __free_pages+0x21/0x80 mm/page_alloc.c:3897
 RSP <ffff8801d889f940>
---[ end trace 01bd17c31a94221e ]---