netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'.
netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'.
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
BUG: spinlock bad magic on CPU#0, syz-executor2/24316
 lock: 0xffff8801cd0e8018, .magic: dead4eac, .owner: <none>/-1, .owner_cpu: -1
CPU: 0 PID: 24316 Comm: syz-executor2 Not tainted 4.9.80-g8a174b47 #39
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801beb2fb98 ffffffff81d94be9 ffff8801cd0e8018 ffff8801bff34800
 ffff8801c1f2733c ffff8801cd0e8018 ffff8801c583ff88 ffff8801beb2fbd8
 ffffffff8124897d ffffffff81223fcf ffff880100000000 0000000000000000
Call Trace:
 [<ffffffff81d94be9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d94be9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8124897d>] spin_dump+0x14d/0x280 kernel/locking/spinlock_debug.c:67
 [<ffffffff81248cb4>] spin_bug kernel/locking/spinlock_debug.c:75 [inline]
 [<ffffffff81248cb4>] debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline]
 [<ffffffff81248cb4>] do_raw_spin_lock+0x174/0x1e0 kernel/locking/spinlock_debug.c:112
 [<ffffffff838b3316>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline]
 [<ffffffff838b3316>] _raw_spin_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:159
 [<ffffffff81223fcf>] add_wait_queue+0x3f/0xa0 kernel/sched/wait.c:28
 [<ffffffff8165000d>] ep_ptable_queue_proc+0x1bd/0x2b0 fs/eventpoll.c:1138
 [<ffffffff826664db>] poll_wait include/linux/poll.h:45 [inline]
 [<ffffffff826664db>] sg_poll+0xcb/0x340 drivers/scsi/sg.c:1159
 [<ffffffff81655427>] ep_item_poll fs/eventpoll.c:811 [inline]
 [<ffffffff81655427>] ep_insert fs/eventpoll.c:1347 [inline]
 [<ffffffff81655427>] SYSC_epoll_ctl fs/eventpoll.c:1975 [inline]
 [<ffffffff81655427>] SyS_epoll_ctl+0x11d7/0x2190 fs/eventpoll.c:1861
 [<ffffffff81006fc7>] do_syscall_32_irqs_on arch/x86/entry/common.c:322 [inline]
 [<ffffffff81006fc7>] do_fast_syscall_32+0x2f7/0x890 arch/x86/entry/common.c:384
 [<ffffffff838b4db4>] entry_SYSENTER_compat+0x74/0x83 arch/x86/entry/entry_64_compat.S:127
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 24328 Comm: syz-executor3 Not tainted 4.9.80-g8a174b47 #39
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801c498c800 task.stack: ffff8801cef80000
RIP: 0010:[<ffffffff8144ef01>]  [<ffffffff8144ef01>] __read_once_size include/linux/compiler.h:243 [inline]
RIP: 0010:[<ffffffff8144ef01>]  [<ffffffff8144ef01>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP: 0010:[<ffffffff8144ef01>]  [<ffffffff8144ef01>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP: 0010:[<ffffffff8144ef01>]  [<ffffffff8144ef01>] put_page_testzero include/linux/mm.h:450 [inline]
RIP: 0010:[<ffffffff8144ef01>]  [<ffffffff8144ef01>] __free_pages+0x21/0x80 mm/page_alloc.c:3897
RSP: 0018:ffff8801cef87940  EFLAGS: 00010a07
RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff826680eb
RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c
RBP: ffff8801cef87950 R08: 0000000048000000 R09: 0000000000001e30
R10: 0000000000002100 R11: ffff8801c498c800 R12: 0000000000000004
R13: 0000000000000020 R14: ffff8801cbe50000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f6fbcb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000020a13000 CR3: 00000001cd636000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000001 ffff8801cbe50158 ffff8801cef879b0 ffffffff82668111
 ffff8801cbe50170 ffffed00397ca02b ffffed00397ca02e ffff8801cbe50168
 dead4ead00000000 ffff8801cbe50140 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff82668111>] sg_remove_scat.isra.19+0x1c1/0x2d0 drivers/scsi/sg.c:1944
 [<ffffffff826684d5>] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1825
 [<ffffffff826686ed>] sg_new_read.isra.20+0x18d/0x3e0 drivers/scsi/sg.c:566
 [<ffffffff8266a207>] sg_read+0x8b7/0x1440 drivers/scsi/sg.c:455
 [<ffffffff8156cca1>] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714
 [<ffffffff81571bc2>] do_loop_readv_writev fs/read_write.c:1105 [inline]
 [<ffffffff81571bc2>] compat_do_readv_writev+0x522/0x760 fs/read_write.c:1099
 [<ffffffff81571ee3>] compat_readv+0xe3/0x150 fs/read_write.c:1128
 [<ffffffff81572044>] do_compat_readv+0xf4/0x1d0 fs/read_write.c:1148
 [<ffffffff815745b6>] C_SYSC_readv fs/read_write.c:1160 [inline]
 [<ffffffff815745b6>] compat_SyS_readv+0x26/0x30 fs/read_write.c:1156
 [<ffffffff81006fc7>] do_syscall_32_irqs_on arch/x86/entry/common.c:322 [inline]
 [<ffffffff81006fc7>] do_fast_syscall_32+0x2f7/0x890 arch/x86/entry/common.c:384
 [<ffffffff838b4db4>] entry_SYSENTER_compat+0x74/0x83 arch/x86/entry/entry_64_compat.S:127
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  [<ffffffff8144ef01>] __read_once_size include/linux/compiler.h:243 [inline]
RIP  [<ffffffff8144ef01>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP  [<ffffffff8144ef01>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP  [<ffffffff8144ef01>] put_page_testzero include/linux/mm.h:450 [inline]
RIP  [<ffffffff8144ef01>] __free_pages+0x21/0x80 mm/page_alloc.c:3897
 RSP <ffff8801cef87940>
---[ end trace 4a65b0fab82afb6c ]---