kasan: CONFIG_KASAN_INLINE enabled
BUG: spinlock bad magic on CPU#0, syz-executor6/6887
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: 1 PID: 6885 Comm: syz-executor5 Not tainted 4.4.107-g610c835 #12
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801ce6b0000 task.stack: ffff8801ce6e0000
RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] __read_once_size include/linux/compiler.h:218 [inline]
RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] atomic_read arch/x86/include/asm/atomic.h:27 [inline]
RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] put_page_testzero include/linux/mm.h:357 [inline]
RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] __free_pages+0x21/0x90 mm/page_alloc.c:3365
RSP: 0018:ffff8801ce6e79f0  EFLAGS: 00010a07
RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb
RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c
RBP: ffff8801ce6e7a00 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
R13: 0000000000000020 R14: ffff8800ab9c2100 R15: dffffc0000000000
FS:  00007f64c0c5b700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1ea4302db8 CR3: 00000000ab8ef000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000000 ffff8800ab9c2258 ffff8801ce6e7a60 ffffffff825b8cf1
 ffff8800ab9c2270 ffffed001573844b ffffed001573844e ffff8800ab9c2268
 dead4ead00000000 ffff8800ab9c2240 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff825b8cf1>] sg_remove_scat.isra.17+0x1c1/0x2d0 drivers/scsi/sg.c:1964
 [<ffffffff825b90b5>] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1846
 [<ffffffff825b9179>] sg_new_read.isra.18+0x39/0x3c0 drivers/scsi/sg.c:578
 [<ffffffff825bad72>] sg_read+0x8c2/0x1490 drivers/scsi/sg.c:467
 [<ffffffff8151b341>] do_loop_readv_writev+0x141/0x1e0 fs/read_write.c:680
 [<ffffffff8151d69d>] do_readv_writev+0x5dd/0x6e0 fs/read_write.c:810
 [<ffffffff8151d818>] vfs_readv+0x78/0xb0 fs/read_write.c:834
 [<ffffffff8151fb69>] SYSC_readv fs/read_write.c:860 [inline]
 [<ffffffff8151fb69>] SyS_readv+0xd9/0x240 fs/read_write.c:852
 [<ffffffff83773d36>] entry_SYSCALL_64_fastpath+0x16/0x76
Code: 76 ae 0c 00 e9 78 fd ff ff 90 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 49 
RIP  [<ffffffff81431331>] __read_once_size include/linux/compiler.h:218 [inline]
RIP  [<ffffffff81431331>] atomic_read arch/x86/include/asm/atomic.h:27 [inline]
RIP  [<ffffffff81431331>] put_page_testzero include/linux/mm.h:357 [inline]
RIP  [<ffffffff81431331>] __free_pages+0x21/0x90 mm/page_alloc.c:3365
 RSP <ffff8801ce6e79f0>
---[ end trace 2886d0a78d3d6245 ]---
Kernel panic - not syncing: Fatal exception
 lock: 0xffff8800b2024218, .magic: dead4eac, .owner: <none>/-1, .owner_cpu: -1
CPU: 0 PID: 6887 Comm: syz-executor6 Tainted: G      D         4.4.107-g610c835 #12
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 26f7402a0c6c605d ffff8800b25efc18 ffffffff81d0457d
 ffff8800b2024218 ffff8801c513af80 ffff8800b2024218 ffff8800b05d1af8
 ffff8801cf4cde01 ffff8800b25efc58 ffffffff812438fd ffff880000000000
Call Trace:
 [<ffffffff81d0457d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d0457d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff812438fd>] spin_dump+0x14d/0x280 kernel/locking/spinlock_debug.c:67
 [<ffffffff81243ce8>] spin_bug kernel/locking/spinlock_debug.c:75 [inline]
 [<ffffffff81243ce8>] debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline]
 [<ffffffff81243ce8>] do_raw_spin_lock+0x228/0x2c0 kernel/locking/spinlock_debug.c:135
 [<ffffffff83773946>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline]
 [<ffffffff83773946>] _raw_spin_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:159
 [<ffffffff8121caaf>] add_wait_queue+0x3f/0xa0 kernel/sched/wait.c:28
 [<ffffffff815f49cc>] ep_ptable_queue_proc+0x17c/0x270 fs/eventpoll.c:1110
 [<ffffffff825b70bb>] poll_wait include/linux/poll.h:45 [inline]
 [<ffffffff825b70bb>] sg_poll+0xcb/0x340 drivers/scsi/sg.c:1180
 [<ffffffff815f9bd1>] ep_item_poll fs/eventpoll.c:806 [inline]
 [<ffffffff815f9bd1>] ep_insert fs/eventpoll.c:1319 [inline]
 [<ffffffff815f9bd1>] SYSC_epoll_ctl fs/eventpoll.c:1934 [inline]
 [<ffffffff815f9bd1>] SyS_epoll_ctl+0x10b1/0x2050 fs/eventpoll.c:1833
 [<ffffffff83773d36>] entry_SYSCALL_64_fastpath+0x16/0x76
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..