kasan: CONFIG_KASAN_INLINE enabled
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: 0 PID: 3318 Comm: syzkaller034752 Not tainted 4.9.77-ge12a9c4 #18
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801cb599800 task.stack: ffff8801ca148000
RIP: 0010:[<ffffffff8144ed01>]  [<ffffffff8144ed01>] __read_once_size include/linux/compiler.h:243 [inline]
RIP: 0010:[<ffffffff8144ed01>]  [<ffffffff8144ed01>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP: 0010:[<ffffffff8144ed01>]  [<ffffffff8144ed01>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP: 0010:[<ffffffff8144ed01>]  [<ffffffff8144ed01>] put_page_testzero include/linux/mm.h:450 [inline]
RIP: 0010:[<ffffffff8144ed01>]  [<ffffffff8144ed01>] __free_pages+0x21/0x80 mm/page_alloc.c:3903
RSP: 0018:ffff8801ca14f9b0  EFLAGS: 00010a07
RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff8266751b
RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c
RBP: ffff8801ca14f9c0 R08: 0000000048000000 R09: 0000000000001e30
R10: 0000000000002100 R11: ffff8801cb599800 R12: 0000000000000004
R13: 0000000000000020 R14: ffff8801cd2dc200 R15: dffffc0000000000
FS:  00007f6d22816700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020a13000 CR3: 00000001c8cd2000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000001 ffff8801cd2dc358 ffff8801ca14fa20 ffffffff82667541
 ffff8801cd2dc370 ffffed0039a5b86b ffffed0039a5b86e ffff8801cd2dc368
 dead4ead00000000 ffff8801cd2dc340 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff82667541>] sg_remove_scat.isra.19+0x1c1/0x2d0 drivers/scsi/sg.c:1954
 [<ffffffff82667905>] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1836
 [<ffffffff82667b1d>] sg_new_read.isra.20+0x18d/0x3e0 drivers/scsi/sg.c:567
 [<ffffffff826695bd>] sg_read+0x8bd/0x1440 drivers/scsi/sg.c:456
 [<ffffffff8156c5c1>] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714
 [<ffffffff81570430>] do_loop_readv_writev fs/read_write.c:880 [inline]
 [<ffffffff81570430>] do_readv_writev+0x520/0x750 fs/read_write.c:874
 [<ffffffff815706e4>] vfs_readv+0x84/0xc0 fs/read_write.c:898
 [<ffffffff81570806>] do_readv+0xe6/0x250 fs/read_write.c:924
 [<ffffffff81573cf7>] SYSC_readv fs/read_write.c:1011 [inline]
 [<ffffffff81573cf7>] SyS_readv+0x27/0x30 fs/read_write.c:1008
 [<ffffffff838b2c2e>] entry_SYSCALL_64_fastpath+0x29/0xe8
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  [<ffffffff8144ed01>] __read_once_size include/linux/compiler.h:243 [inline]
RIP  [<ffffffff8144ed01>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP  [<ffffffff8144ed01>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP  [<ffffffff8144ed01>] put_page_testzero include/linux/mm.h:450 [inline]
RIP  [<ffffffff8144ed01>] __free_pages+0x21/0x80 mm/page_alloc.c:3903
 RSP <ffff8801ca14f9b0>
---[ end trace 649c44311da9f384 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..