kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access[   73.895814] BUG: spinlock bad magic on CPU#1, syz-executor7/14225
 lock: 0xffff8801cf2a4218, .magic: dead4eac, .owner: <none>/-1, .owner_cpu: -1
CPU: 1 PID: 14225 Comm: syz-executor7 Not tainted 4.4.112-g52c02cf #23
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 260e9e51a5351de6 ffff8800b3fb7a80 ffffffff81d056fd
 ffff8801cf2a4218 ffff8801d1304740 ffff8801cc77c340 ffff8801cc77c300[   73.942852] general protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 14242 Comm: syz-executor4 Not tainted 4.4.112-g52c02cf #23
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d5574740 task.stack: ffff8800b43f0000
RIP: 0010:[<ffffffff814339b1>]  [<ffffffff814339b1>] __read_once_size include/linux/compiler.h:218 [inline]
RIP: 0010:[<ffffffff814339b1>]  [<ffffffff814339b1>] atomic_read arch/x86/include/asm/atomic.h:27 [inline]
RIP: 0010:[<ffffffff814339b1>]  [<ffffffff814339b1>] put_page_testzero include/linux/mm.h:357 [inline]
RIP: 0010:[<ffffffff814339b1>]  [<ffffffff814339b1>] __free_pages+0x21/0x90 mm/page_alloc.c:3365
RSP: 0018:ffff8800b43f79c0  EFLAGS: 00010a07
RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825ba68b
RDX: 1bd5a9d5a0000003 RSI: 0000000000000000 RDI: dead4ead0000001c
RBP: ffff8800b43f79d0 R08: ffffed003a2f7124 R09: ffff8801d17b8900
R10: 0000000000000005 R11: ffffed003a2f7124 R12: 0000000000000004
R13: 0000000000000020 R14: ffff8800b3f7a100 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f6f49b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000008a4f1b4 CR3: 00000000b0bd4000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000000 ffff8800b3f7a258 ffff8800b43f7a30 ffffffff825ba6b1
 ffff8800b3f7a270 ffffed00167ef44b ffffed00167ef44e ffff8800b3f7a268
 dead4ead00000000 ffff8800b3f7a240 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff825ba6b1>] sg_remove_scat.isra.17+0x1c1/0x2d0 drivers/scsi/sg.c:1964
 [<ffffffff825baa75>] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1846
 [<ffffffff825bc891>] sg_read+0xa21/0x1490 drivers/scsi/sg.c:538
 [<ffffffff8151d171>] do_loop_readv_writev+0x141/0x1e0 fs/read_write.c:680
 [<ffffffff8151fd0f>] compat_do_readv_writev+0x5df/0x6e0 fs/read_write.c:984
 [<ffffffff8151fee9>] compat_readv+0xd9/0x140 fs/read_write.c:1013
 [<ffffffff81522278>] C_SYSC_readv fs/read_write.c:1033 [inline]
 [<ffffffff81522278>] compat_SyS_readv+0xd8/0x1b0 fs/read_write.c:1022
 [<ffffffff81006d84>] do_syscall_32_irqs_on arch/x86/entry/common.c:390 [inline]
 [<ffffffff81006d84>] do_fast_syscall_32+0x314/0x890 arch/x86/entry/common.c:457
 [<ffffffff83777d6a>] sysenter_flags_fixed+0xd/0x17
Code: 26 a6 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  [<ffffffff814339b1>] __read_once_size include/linux/compiler.h:218 [inline]
RIP  [<ffffffff814339b1>] atomic_read arch/x86/include/asm/atomic.h:27 [inline]
RIP  [<ffffffff814339b1>] put_page_testzero include/linux/mm.h:357 [inline]
RIP  [<ffffffff814339b1>] __free_pages+0x21/0x90 mm/page_alloc.c:3365
 RSP <ffff8800b43f79c0>
---[ end trace 87882e6978d44b16 ]---