kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
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Modules linked in:
CPU: 1 PID: 3328 Comm: syzkaller755267 Not tainted 4.4.107-g610c835 #12
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800b56217c0 task.stack: ffff8801d0c58000
RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] __read_once_size include/linux/compiler.h:218 [inline]
RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] atomic_read arch/x86/include/asm/atomic.h:27 [inline]
RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] put_page_testzero include/linux/mm.h:357 [inline]
RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] __free_pages+0x21/0x90 mm/page_alloc.c:3365
RSP: 0018:ffff8801d0c5fb00  EFLAGS: 00010a07
RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb
RDX: 1bd5a9d5a0000003 RSI: 0000000000000000 RDI: dead4ead0000001c
RBP: ffff8801d0c5fb10 R08: ffffed001696e070 R09: ffff8800b4b70360
R10: 0000000000000005 R11: ffffed001696e070 R12: 0000000000000004
R13: 0000000000000020 R14: ffff8801d1352100 R15: dffffc0000000000
FS:  00007f76ddfcb700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000205c7f24 CR3: 00000001d177a000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000000 ffff8801d1352258 ffff8801d0c5fb70 ffffffff825b8cf1
 ffff8801d1352270 ffffed003a26a44b ffffed003a26a44e ffff8801d1352268
 dead4ead00000000 ffff8801d1352240 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff825b8cf1>] sg_remove_scat.isra.17+0x1c1/0x2d0 drivers/scsi/sg.c:1964
 [<ffffffff825b90b5>] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1846
 [<ffffffff825baed1>] sg_read+0xa21/0x1490 drivers/scsi/sg.c:538
 [<ffffffff8151aa73>] __vfs_read+0x103/0x440 fs/read_write.c:432
 [<ffffffff8151c913>] vfs_read+0x123/0x3a0 fs/read_write.c:454
 [<ffffffff8151f259>] SYSC_read fs/read_write.c:569 [inline]
 [<ffffffff8151f259>] SyS_read+0xd9/0x1b0 fs/read_write.c:562
 [<ffffffff83773d36>] entry_SYSCALL_64_fastpath+0x16/0x76
Code: 76 ae 0c 00 e9 78 fd ff ff 90 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 49 
RIP  [<ffffffff81431331>] __read_once_size include/linux/compiler.h:218 [inline]
RIP  [<ffffffff81431331>] atomic_read arch/x86/include/asm/atomic.h:27 [inline]
RIP  [<ffffffff81431331>] put_page_testzero include/linux/mm.h:357 [inline]
RIP  [<ffffffff81431331>] __free_pages+0x21/0x90 mm/page_alloc.c:3365
 RSP <ffff8801d0c5fb00>
---[ end trace be14116082fc576e ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
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Kernel Offset: disabled
Rebooting in 86400 seconds..