ffff8801d633f880 ffffffff81d91589 1ffff1003ac67f13 ffff8801ab94b000
 ffffffff83ab7b80 0000000000000001[  101.517258] 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: 14670 Comm: syz-executor3 Not tainted 4.9.61-gd55e630 #87
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801c8408000 task.stack: ffff8801c88e8000
RIP: 0010:[<ffffffff8144db91>] 
 [<ffffffff8144db91>] __read_once_size include/linux/compiler.h:243 [inline]
 [<ffffffff8144db91>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
 [<ffffffff8144db91>] page_ref_count include/linux/page_ref.h:66 [inline]
 [<ffffffff8144db91>] put_page_testzero include/linux/mm.h:445 [inline]
 [<ffffffff8144db91>] __free_pages+0x21/0x80 mm/page_alloc.c:3901
RSP: 0018:ffff8801c88ef9b0  EFLAGS: 00010a07
RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffc90001297000
RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
RBP: ffff8801c88ef9c0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
R13: 0000000000000020 R14: ffff8801a92dc200 R15: dffffc0000000000
FS:  00007fd4e8ba0700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020d91000 CR3: 00000001cb30b000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801c8408000
 ffff8801a92dc358 ffff8801c88efa20 ffffffff8265fd31[  101.517407]  ffff8801a92dc370
 ffffed003525b86b ffffed003525b86e ffff8801a92dc368[  101.517421]  dead4ead00000000
 ffff8801a92dc340 0000000000000000 0000000000000000[  101.517431] Call Trace:
 [<ffffffff8265fd31>] sg_remove_scat.isra.20+0x1c1/0x2d0 drivers/scsi/sg.c:1954
 [<ffffffff826600f5>] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1836
 [<ffffffff826601b9>] sg_new_read.isra.21+0x39/0x3e0 drivers/scsi/sg.c:567
 [<ffffffff82661d96>] sg_read+0x8a6/0x1400 drivers/scsi/sg.c:456
 [<ffffffff8156ab91>] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714
 [<ffffffff8156e950>] do_loop_readv_writev fs/read_write.c:880 [inline]
 [<ffffffff8156e950>] do_readv_writev+0x520/0x750 fs/read_write.c:874
 [<ffffffff8156ec04>] vfs_readv+0x84/0xc0 fs/read_write.c:898
 [<ffffffff8156ed26>] do_readv+0xe6/0x250 fs/read_write.c:924
 [<ffffffff815721a7>] SYSC_readv fs/read_write.c:1011 [inline]
 [<ffffffff815721a7>] SyS_readv+0x27/0x30 fs/read_write.c:1008
 [<ffffffff838aadc5>] entry_SYSCALL_64_fastpath+0x23/0xc6
Code: 
ff 66 0f 1f 84 00 00 00 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 [  101.517793] RIP 
 [<ffffffff8144db91>] __read_once_size include/linux/compiler.h:243 [inline]
 [<ffffffff8144db91>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
 [<ffffffff8144db91>] page_ref_count include/linux/page_ref.h:66 [inline]
 [<ffffffff8144db91>] put_page_testzero include/linux/mm.h:445 [inline]
 [<ffffffff8144db91>] __free_pages+0x21/0x80 mm/page_alloc.c:3901
---[ end trace 2dfa288b10d9224d ]---
Kernel panic - not syncing: Fatal exception
 0000000000400000 ffff8801d633f990
 ffffffff81450982 024000c200000003 0000000041b58ab3 ffffffff841904f5
Call Trace:
 [<ffffffff81d91589>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d91589>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81450982>] warn_alloc+0x212/0x240 mm/page_alloc.c:3054
 [<ffffffff814fe245>] __vmalloc_node_range+0x3f5/0x5f0 mm/vmalloc.c:1722
 [<ffffffff814fe50b>] __vmalloc_node mm/vmalloc.c:1744 [inline]
 [<ffffffff814fe50b>] __vmalloc_node_flags mm/vmalloc.c:1758 [inline]
 [<ffffffff814fe50b>] vmalloc+0x5b/0x70 mm/vmalloc.c:1773
 [<ffffffff83139801>] xt_alloc_entry_offsets+0x41/0x60 net/netfilter/x_tables.c:722
 [<ffffffff8337ba3a>] translate_table+0x21a/0x1e30 net/ipv4/netfilter/ip_tables.c:700
 [<ffffffff8337f82e>] do_replace net/ipv4/netfilter/ip_tables.c:1151 [inline]
 [<ffffffff8337f82e>] do_ipt_set_ctl+0x2be/0x470 net/ipv4/netfilter/ip_tables.c:1687
 [<ffffffff83097f37>] nf_sockopt net/netfilter/nf_sockopt.c:105 [inline]
 [<ffffffff83097f37>] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:114
 [<ffffffff8320a391>] ip_setsockopt+0xa1/0xb0 net/ipv4/ip_sockglue.c:1243
 [<ffffffff8322a1c2>] tcp_setsockopt+0x82/0xd0 net/ipv4/tcp.c:2734
 [<ffffffff82ed5225>] sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2707
 [<ffffffff82ed21e0>] SYSC_setsockopt net/socket.c:1771 [inline]
 [<ffffffff82ed21e0>] SyS_setsockopt+0x160/0x250 net/socket.c:1750
 [<ffffffff838aadc5>] entry_SYSCALL_64_fastpath+0x23/0xc6
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..