kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
BUG: spinlock bad magic on CPU#1, syz-executor7/7257
 lock: 0xffff8801b341a118, .magic: dead4eac, .owner: <none>/-1, .owner_cpu: -1
CPU: 1 PID: 7257 Comm: syz-executor7 Not tainted 4.9.71-g2506378 #113
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d788f878 ffffffff81d922b9 ffff8801b341a118 ffff8801d98e8000
 ffffed0039102940 ffffffff844d7fe0 ffff8801c8814a00 ffff8801d788f8b8
 ffffffff81246a9d ffffffff81222604 ffff880100000000 0000000000000000
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
 [<ffffffff838aee06>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline]
 [<ffffffff838aee06>] _raw_spin_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:159
 [<ffffffff81222604>] remove_wait_queue+0x14/0x40 kernel/sched/wait.c:49
 [<ffffffff8164eaef>] ep_remove_wait_queue fs/eventpoll.c:535 [inline]
 [<ffffffff8164eaef>] ep_unregister_pollwait.isra.6+0xaf/0x240 fs/eventpoll.c:553
 [<ffffffff8164f551>] ep_remove+0x41/0x290 fs/eventpoll.c:716
 [<ffffffff816514f5>] eventpoll_release_file+0xc5/0x140 fs/eventpoll.c:940
 [<ffffffff81573268>] eventpoll_release include/linux/eventpoll.h:61 [inline]
 [<ffffffff81573268>] __fput+0x5a8/0x6e0 fs/file_table.c:199
 [<ffffffff81573425>] ____fput+0x15/0x20 fs/file_table.c:244
 [<ffffffff81193a25>] task_work_run+0x115/0x190 kernel/task_work.c:116
 [<ffffffff8113a507>] exit_task_work include/linux/task_work.h:21 [inline]
 [<ffffffff8113a507>] do_exit+0x7e7/0x2a40 kernel/exit.c:833
 [<ffffffff81140c18>] do_group_exit+0x108/0x320 kernel/exit.c:937
 [<ffffffff81163a44>] get_signal+0x4d4/0x14e0 kernel/signal.c:2315
 [<ffffffff81052c87>] do_signal+0x87/0x1a00 arch/x86/kernel/signal.c:807
 [<ffffffff81003a31>] exit_to_usermode_loop+0xe1/0x120 arch/x86/entry/common.c:156
 [<ffffffff81006340>] prepare_exit_to_usermode arch/x86/entry/common.c:190 [inline]
 [<ffffffff81006340>] syscall_return_slowpath+0x1a0/0x1e0 arch/x86/entry/common.c:259
 [<ffffffff838af026>] entry_SYSCALL_64_fastpath+0xc4/0xc6
device gre0 entered promiscuous mode
device gre0 entered promiscuous mode
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 0 PID: 7299 Comm: syz-executor3 Not tainted 4.9.71-g2506378 #113
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d8c3f670 ffffffff81d922b9 ffff8801d8c3f950 0000000000000000
 ffff8801c764f190 ffff8801d8c3f840 ffff8801c764f080 ffff8801d8c3f868
 ffffffff8165fb7a ffff8801d8c3f718 ffff8801d8c3f7c0 00000001c2dd8067
Call Trace:
 [<ffffffff81d922b9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d922b9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8165fb7a>] handle_userfault+0xa3a/0x1310 fs/userfaultfd.c:323
 [<ffffffff814cea81>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814cea81>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814cea81>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814cea81>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff810dd462>] __do_page_fault+0x5c2/0xd40 arch/x86/mm/fault.c:1406
 [<ffffffff810ddc07>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1469
 [<ffffffff838b0158>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1007
 [<ffffffff815b16de>] do_pselect fs/select.c:688 [inline]
 [<ffffffff815b16de>] SYSC_pselect6 fs/select.c:729 [inline]
 [<ffffffff815b16de>] SyS_pselect6+0x2ae/0x550 fs/select.c:714
 [<ffffffff838aef85>] entry_SYSCALL_64_fastpath+0x23/0xc6
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 0 PID: 7291 Comm: syz-executor3 Not tainted 4.9.71-g2506378 #113
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801b35d77b0 ffffffff81d922b9 ffff8801b35d7a90 0000000000000000
 ffff8801c764f190 ffff8801b35d7980 ffff8801c764f080 ffff8801b35d79a8
 ffffffff8165fb7a ffff8801d9424380 ffff8801b35d7900 00000001c2dd8067
Call Trace:
 [<ffffffff81d922b9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d922b9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8165fb7a>] handle_userfault+0xa3a/0x1310 fs/userfaultfd.c:323
 [<ffffffff814cea81>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814cea81>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814cea81>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814cea81>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff810dd462>] __do_page_fault+0x5c2/0xd40 arch/x86/mm/fault.c:1406
 [<ffffffff810ddc07>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1469
 [<ffffffff838b0158>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1007
 [<ffffffff815a1e4e>] getname_flags+0x10e/0x580 fs/namei.c:148
 [<ffffffff815a2bbd>] user_path_at_empty+0x2d/0x50 fs/namei.c:2576
 [<ffffffff8157b586>] user_path_at include/linux/namei.h:55 [inline]
 [<ffffffff8157b586>] vfs_fstatat+0xc6/0x170 fs/stat.c:106
 [<ffffffff8157c786>] vfs_stat fs/stat.c:123 [inline]
 [<ffffffff8157c786>] SYSC_newstat+0x86/0x100 fs/stat.c:270
 [<ffffffff8157cbad>] SyS_newstat+0x1d/0x30 fs/stat.c:266
 [<ffffffff838aef85>] entry_SYSCALL_64_fastpath+0x23/0xc6
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 7265 Comm: syz-executor4 Not tainted 4.9.71-g2506378 #113
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d9b99800 task.stack: ffff8801d8598000
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:ffff8801d859f9b0  EFLAGS: 00010a07
RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664deb
RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c
RBP: ffff8801d859f9c0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
R13: 0000000000000020 R14: ffff8801d9224200 R15: dffffc0000000000
FS:  00007f8389381700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc341e6f40 CR3: 00000001d95df000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801d9b99800 ffff8801d9224358 ffff8801d859fa20 ffffffff82664e11
 ffff8801d9224370 ffffed003b24486b ffffed003b24486e ffff8801d9224368
 dead4ead00000000 ffff8801d9224340 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff82664e11>] sg_remove_scat.isra.19+0x1c1/0x2d0 drivers/scsi/sg.c:1954
 [<ffffffff826651d5>] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1836
 [<ffffffff82665299>] sg_new_read.isra.20+0x39/0x3e0 drivers/scsi/sg.c:567
 [<ffffffff82666e8d>] 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
 [<ffffffff838aef85>] 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 <ffff8801d859f9b0>
---[ end trace 35756874c11f6755 ]---