FAT-fs (loop2): bogus number of reserved sectors
FAT-fs (loop2): Can't find a valid FAT filesystem
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kernel BUG at mm/vmscan.c:593!
invalid opcode: 0000 [#1] SMP KASAN
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CPU: 1 PID: 1530 Comm: kswapd0 Not tainted 4.18.0-rc3-next-20180706+ #1
kernel BUG at mm/vmscan.c:593!
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:shrink_slab_memcg mm/vmscan.c:593 [inline]
RIP: 0010:shrink_slab+0xb3e/0xdb0 mm/vmscan.c:672
Code: 8d a8 fd ff ff f0 48 0f b3 08 e8 3d b8 da ff 48 8b 85 c0 fd ff ff c7 00 f8 f8 f8 f8 c6 40 04 f8 e9 5d fb ff ff e8 22 b8 da ff <0f> 0b e8 1b b8 da ff 48 8b 9d d8 fd ff ff 31 ff 48 89 de e8 3a b9 
RSP: 0018:ffff8801d3e474c0 EFLAGS: 00010293
RAX: ffff8801d3ebc040 RBX: ffff8801d3e47710 RCX: ffffffff81a1bf32
RDX: 0000000000000000 RSI: ffffffff81a1c23e RDI: 0000000000000007
RBP: ffff8801d3e47738 R08: ffff8801d3ebc040 R09: ffffed0039843fc8
R10: ffffed0039843fc8 R11: ffff8801cc21fe47 R12: dffffc0000000000
R13: ffff8801cc31d1f0 R14: 0000000000000000 R15: ffff8801d3e47550
FS:  0000000000000000(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000a8cfd0 CR3: 00000001a3b63000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 shrink_node+0x429/0x16a0 mm/vmscan.c:2736
 kswapd_shrink_node mm/vmscan.c:3458 [inline]
 balance_pgdat+0x7ca/0x1010 mm/vmscan.c:3568
 kswapd+0x82e/0x12f0 mm/vmscan.c:3790
 kthread+0x345/0x410 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
invalid opcode: 0000 [#2] SMP KASAN
---[ end trace 4c939571f059ab45 ]---
CPU: 0 PID: 29324 Comm: syz-executor4 Tainted: G      D           4.18.0-rc3-next-20180706+ #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:shrink_slab_memcg mm/vmscan.c:593 [inline]
RIP: 0010:shrink_slab+0xb3e/0xdb0 mm/vmscan.c:672
RIP: 0010:shrink_slab_memcg mm/vmscan.c:593 [inline]
RIP: 0010:shrink_slab+0xb3e/0xdb0 mm/vmscan.c:672
Code: 
Code: 
8d a8 fd 
8d 
ff ff f0 48 0f 
a8 
b3 08 e8 3d b8 
fd 
da ff 48 8b 
ff 
85 c0 fd ff ff 
ff 
c7 00 f8 f8 f8 
f0 
f8 c6 40 04 f8 
48 
e9 5d fb ff ff 
0f 
e8 22 b8 da ff 
b3 
<0f> 0b e8 1b b8 
08 
da ff 48 8b 9d d8 fd 
e8 
ff ff 31 ff 48 89 
3d 
de e8 3a b9 
b8 
RSP: 0018:ffff88019b9e6040 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff88019b9e6290 RCX: ffffc90003a22000
RDX: 0000000000040000 RSI: ffffffff81a1c23e RDI: 0000000000000007
da 
RBP: ffff88019b9e62b8 R08: ffff880198cee500 R09: ffffed0039843fc8
R10: ffffed0039843fc8 R11: ffff8801cc21fe47 R12: dffffc0000000000
R13: ffff8801cc31d1f0 R14: 0000000000000000 R15: ffff88019b9e60d0
ff 
FS:  00007f21d3f9b700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdb401ee000 CR3: 00000001a3b63000 CR4: 00000000001406f0
48 
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
8b 
85 
c0 
fd 
 shrink_node+0x429/0x16a0 mm/vmscan.c:2736
ff 
ff 
c7 
00 
f8 
f8 
 shrink_zones mm/vmscan.c:2965 [inline]
 do_try_to_free_pages+0x3e7/0x1290 mm/vmscan.c:3027
f8 
f8 
c6 
 try_to_free_pages+0x4b2/0xb80 mm/vmscan.c:3242
40 
04 
f8 
e9 
5d 
fb 
 __perform_reclaim mm/page_alloc.c:3769 [inline]
 __alloc_pages_direct_reclaim mm/page_alloc.c:3790 [inline]
 __alloc_pages_slowpath+0x953/0x2d00 mm/page_alloc.c:4191
ff 
ff 
e8 
22 
b8 
da 
ff 
<0f> 
0b 
 __alloc_pages_nodemask+0xa7c/0xdb0 mm/page_alloc.c:4390
e8 
1b 
b8 
da 
ff 
 alloc_pages_current+0x10c/0x210 mm/mempolicy.c:2093
48 
 alloc_pages include/linux/gfp.h:492 [inline]
 __page_cache_alloc+0x398/0x5e0 mm/filemap.c:925
8b 
9d 
 __do_page_cache_readahead+0x24e/0x690 mm/readahead.c:191
d8 
fd 
 ra_submit mm/internal.h:66 [inline]
 ondemand_readahead+0x550/0xc40 mm/readahead.c:481
ff 
 page_cache_sync_readahead+0xd1/0x110 mm/readahead.c:513
ff 
 generic_file_buffered_read mm/filemap.c:2004 [inline]
 generic_file_read_iter+0x1a89/0x2f10 mm/filemap.c:2274
31 
ff 
48 
89 
de 
e8 
3a 
b9 
RSP: 0018:ffff8801d3e474c0 EFLAGS: 00010293
RAX: ffff8801d3ebc040 RBX: ffff8801d3e47710 RCX: ffffffff81a1bf32
RDX: 0000000000000000 RSI: ffffffff81a1c23e RDI: 0000000000000007
RBP: ffff8801d3e47738 R08: ffff8801d3ebc040 R09: ffffed0039843fc8
R10: ffffed0039843fc8 R11: ffff8801cc21fe47 R12: dffffc0000000000
R13: ffff8801cc31d1f0 R14: 0000000000000000 R15: ffff8801d3e47550
FS:  0000000000000000(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000a8cfd0 CR3: 00000001a3b63000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
 blkdev_read_iter+0x120/0x190 fs/block_dev.c:1933
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
 call_read_iter include/linux/fs.h:1816 [inline]
 new_sync_read fs/read_write.c:406 [inline]
 __vfs_read+0x6d8/0xa80 fs/read_write.c:418