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: 1 PID: 5959 Comm: syzkaller883471 Not tainted 4.9.85-gf673852 #48
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d06a3000 task.stack: ffff8801bd928000
RIP: 0010:[<ffffffff8144eec1>]  [<ffffffff8144eec1>] __read_once_size include/linux/compiler.h:243 [inline]
RIP: 0010:[<ffffffff8144eec1>]  [<ffffffff8144eec1>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP: 0010:[<ffffffff8144eec1>]  [<ffffffff8144eec1>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP: 0010:[<ffffffff8144eec1>]  [<ffffffff8144eec1>] put_page_testzero include/linux/mm.h:450 [inline]
RIP: 0010:[<ffffffff8144eec1>]  [<ffffffff8144eec1>] __free_pages+0x21/0x80 mm/page_alloc.c:3897
RSP: 0018:ffff8801bd92fab0  EFLAGS: 00010a07
RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82668efb
RDX: 1bd5a9d5a0000003 RSI: 0000000000000000 RDI: dead4ead0000001c
RBP: ffff8801bd92fac0 R08: 0000000000000000 R09: ffffed003a871ae9
R10: 0000000000000005 R11: ffffed003a871ae8 R12: 0000000000000004
R13: 0000000000000020 R14: ffff8801c07fc200 R15: dffffc0000000000
FS:  00007fd5683fb700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd5683fae78 CR3: 00000001b9c40000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000001 ffff8801c07fc358 ffff8801bd92fb20 ffffffff82668f21
 ffff8801c07fc370 ffffed00380ff86b ffffed00380ff86e ffff8801c07fc368
 dead4ead00000000 ffff8801c07fc340 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff82668f21>] sg_remove_scat.isra.19+0x1c1/0x2d0 drivers/scsi/sg.c:1944
 [<ffffffff826692e5>] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1825
 [<ffffffff8266b176>] sg_read+0xa16/0x1440 drivers/scsi/sg.c:526
 [<ffffffff8156c083>] __vfs_read+0x103/0x670 fs/read_write.c:449
 [<ffffffff8156ff9e>] vfs_read+0x11e/0x380 fs/read_write.c:472
 [<ffffffff81573c99>] SYSC_read fs/read_write.c:588 [inline]
 [<ffffffff81573c99>] SyS_read+0xd9/0x1b0 fs/read_write.c:581
 [<ffffffff81006504>] do_syscall_64+0x1a4/0x490 arch/x86/entry/common.c:282
 [<ffffffff838b5413>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
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  [<ffffffff8144eec1>] __read_once_size include/linux/compiler.h:243 [inline]
RIP  [<ffffffff8144eec1>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP  [<ffffffff8144eec1>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP  [<ffffffff8144eec1>] put_page_testzero include/linux/mm.h:450 [inline]
RIP  [<ffffffff8144eec1>] __free_pages+0x21/0x80 mm/page_alloc.c:3897
 RSP <ffff8801bd92fab0>
---[ end trace e66bfd3dbe19e8a0 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..