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: 3803 Comm: syzkaller042581 Not tainted 4.9.81-g2a5cc53 #35
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d7cac800 task.stack: ffff8801c1740000
RIP: 0010:[<ffffffff8144ef61>]  [<ffffffff8144ef61>] __read_once_size include/linux/compiler.h:243 [inline]
RIP: 0010:[<ffffffff8144ef61>]  [<ffffffff8144ef61>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP: 0010:[<ffffffff8144ef61>]  [<ffffffff8144ef61>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP: 0010:[<ffffffff8144ef61>]  [<ffffffff8144ef61>] put_page_testzero include/linux/mm.h:450 [inline]
RIP: 0010:[<ffffffff8144ef61>]  [<ffffffff8144ef61>] __free_pages+0x21/0x80 mm/page_alloc.c:3897
RSP: 0018:ffff8801c1747a60  EFLAGS: 00010a07
RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff8266840b
RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
RBP: ffff8801c1747a70 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
R13: 0000000000000020 R14: ffff8801ba73a100 R15: dffffc0000000000
FS:  0000000001bfa880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020a2f000 CR3: 00000001da384000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801d7cac800 ffff8801ba73a258 ffff8801c1747ad0 ffffffff82668431
 ffff8801ba73a270 ffffed00374e744b ffffed00374e744e ffff8801ba73a268
 dead4ead00000000 ffff8801ba73a240 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff82668431>] sg_remove_scat.isra.19+0x1c1/0x2d0 drivers/scsi/sg.c:1944
 [<ffffffff826687f5>] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1825
 [<ffffffff826688b9>] sg_new_read.isra.20+0x39/0x3e0 drivers/scsi/sg.c:566
 [<ffffffff8266a527>] sg_read+0x8b7/0x1440 drivers/scsi/sg.c:455
 [<ffffffff8156c123>] __vfs_read+0x103/0x670 fs/read_write.c:452
 [<ffffffff8156febe>] vfs_read+0x11e/0x380 fs/read_write.c:475
 [<ffffffff81573be9>] SYSC_read fs/read_write.c:591 [inline]
 [<ffffffff81573be9>] SyS_read+0xd9/0x1b0 fs/read_write.c:584
 [<ffffffff81006505>] do_syscall_64+0x1a5/0x490 arch/x86/entry/common.c:282
 [<ffffffff838b3dfd>] entry_SYSCALL_64_after_swapgs+0x47/0xc5
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  [<ffffffff8144ef61>] __read_once_size include/linux/compiler.h:243 [inline]
RIP  [<ffffffff8144ef61>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP  [<ffffffff8144ef61>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP  [<ffffffff8144ef61>] put_page_testzero include/linux/mm.h:450 [inline]
RIP  [<ffffffff8144ef61>] __free_pages+0x21/0x80 mm/page_alloc.c:3897
 RSP <ffff8801c1747a60>
---[ end trace 91254ea65cfedb9b ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
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Kernel Offset: disabled
Rebooting in 86400 seconds..