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: 3660 Comm: syzkaller951887 Not tainted 4.9.83-gda9fb78 #40
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801c3626000 task.stack: ffff8801bf830000
RIP: 0010:[<ffffffff8144f001>]  [<ffffffff8144f001>] __read_once_size include/linux/compiler.h:243 [inline]
RIP: 0010:[<ffffffff8144f001>]  [<ffffffff8144f001>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP: 0010:[<ffffffff8144f001>]  [<ffffffff8144f001>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP: 0010:[<ffffffff8144f001>]  [<ffffffff8144f001>] put_page_testzero include/linux/mm.h:450 [inline]
RIP: 0010:[<ffffffff8144f001>]  [<ffffffff8144f001>] __free_pages+0x21/0x80 mm/page_alloc.c:3897
RSP: 0018:ffff8801bf837950  EFLAGS: 00010a07
RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff826687fb
RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
RBP: ffff8801bf837960 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
R13: 0000000000000020 R14: ffff8801c0374200 R15: dffffc0000000000
FS:  00007fbebb1d9700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020ef0fe0 CR3: 00000001c752e000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801c3626000 ffff8801c0374358 ffff8801bf8379c0 ffffffff82668821
 ffff8801c0374370 ffffed003806e86b ffffed003806e86e ffff8801c0374368
 dead4ead00000000 ffff8801c0374340 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff82668821>] sg_remove_scat.isra.19+0x1c1/0x2d0 drivers/scsi/sg.c:1944
 [<ffffffff82668be5>] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1825
 [<ffffffff82668ca9>] sg_new_read.isra.20+0x39/0x3e0 drivers/scsi/sg.c:566
 [<ffffffff8266a917>] sg_read+0x8b7/0x1440 drivers/scsi/sg.c:455
 [<ffffffff8156cda1>] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714
 [<ffffffff81570c10>] do_loop_readv_writev fs/read_write.c:880 [inline]
 [<ffffffff81570c10>] do_readv_writev+0x520/0x750 fs/read_write.c:874
 [<ffffffff81570ec4>] vfs_readv+0x84/0xc0 fs/read_write.c:898
 [<ffffffff81570fe6>] do_readv+0xe6/0x250 fs/read_write.c:924
 [<ffffffff815744d7>] SYSC_readv fs/read_write.c:1011 [inline]
 [<ffffffff815744d7>] SyS_readv+0x27/0x30 fs/read_write.c:1008
 [<ffffffff81006504>] do_syscall_64+0x1a4/0x490 arch/x86/entry/common.c:282
 [<ffffffff838b4e7d>] 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  [<ffffffff8144f001>] __read_once_size include/linux/compiler.h:243 [inline]
RIP  [<ffffffff8144f001>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP  [<ffffffff8144f001>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP  [<ffffffff8144f001>] put_page_testzero include/linux/mm.h:450 [inline]
RIP  [<ffffffff8144f001>] __free_pages+0x21/0x80 mm/page_alloc.c:3897
 RSP <ffff8801bf837950>
general protection fault: 0000 [#2] PREEMPT SMP KASAN
---[ end trace fc7b2306711b0d50 ]---