BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor4/7728
caller is __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
CPU: 0 PID: 7728 Comm: syz-executor4 Not tainted 4.9.78-gf518fe4 #22
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d5c376d8 ffffffff81d943a9 0000000000000000 ffffffff83c18800
 ffffffff83f45480 ffff8801d6564800 0000000000000003 ffff8801d5c37718
 ffffffff81dfb974 ffff8801d5c37730 ffffffff83f45480 dffffc0000000000
Call Trace:
 [<ffffffff81d943a9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d943a9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81dfb974>] check_preemption_disabled+0x1d4/0x200 lib/smp_processor_id.c:46
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: 7743 Comm: syz-executor1 Not tainted 4.9.78-gf518fe4 #22
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d6afc800 task.stack: ffff8801c1f58000
RIP: 0010:[<ffffffff8144ed91>]  [<ffffffff8144ed91>] __read_once_size include/linux/compiler.h:243 [inline]
RIP: 0010:[<ffffffff8144ed91>]  [<ffffffff8144ed91>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP: 0010:[<ffffffff8144ed91>]  [<ffffffff8144ed91>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP: 0010:[<ffffffff8144ed91>]  [<ffffffff8144ed91>] put_page_testzero include/linux/mm.h:450 [inline]
RIP: 0010:[<ffffffff8144ed91>]  [<ffffffff8144ed91>] __free_pages+0x21/0x80 mm/page_alloc.c:3903
RSP: 0018:ffff8801c1f5f9b0  EFLAGS: 00010a07
RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff826676fb
RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
RBP: ffff8801c1f5f9c0 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: ffff8801d6afc800 R12: 0000000000000004
R13: 0000000000000020 R14: ffff8801b1d64200 R15: dffffc0000000000
FS:  00007f478b53c700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020007000 CR3: 00000001d9b3e000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff838b37a9 ffff8801b1d64358 ffff8801c1f5fa20 ffffffff82667721
 ffff8801b1d64370 ffffed00363ac86b ffffed00363ac86e ffff8801b1d64368
 dead4ead00000000 ffff8801b1d64340 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff82667721>] sg_remove_scat.isra.19+0x1c1/0x2d0 drivers/scsi/sg.c:1944
 [<ffffffff82667ae5>] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1825
 [<ffffffff82667ec6>] sg_new_read.isra.20+0x356/0x3e0 drivers/scsi/sg.c:566
 [<ffffffff82669817>] sg_read+0x8b7/0x1440 drivers/scsi/sg.c:455
 [<ffffffff8156c651>] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714
 [<ffffffff815704c0>] do_loop_readv_writev fs/read_write.c:880 [inline]
 [<ffffffff815704c0>] do_readv_writev+0x520/0x750 fs/read_write.c:874
 [<ffffffff81570774>] vfs_readv+0x84/0xc0 fs/read_write.c:898
 [<ffffffff81570896>] do_readv+0xe6/0x250 fs/read_write.c:924
 [<ffffffff81573d87>] SYSC_readv fs/read_write.c:1011 [inline]
 [<ffffffff81573d87>] SyS_readv+0x27/0x30 fs/read_write.c:1008
 [<ffffffff838b2c6e>] 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  [<ffffffff8144ed91>] __read_once_size include/linux/compiler.h:243 [inline]
RIP  [<ffffffff8144ed91>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP  [<ffffffff8144ed91>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP  [<ffffffff8144ed91>] put_page_testzero include/linux/mm.h:450 [inline]
RIP  [<ffffffff8144ed91>] __free_pages+0x21/0x80 mm/page_alloc.c:3903
 RSP <ffff8801c1f5f9b0>
---[ end trace 6041232bd6de6ae6 ]---