FAT-fs (loop2): bogus number of reserved sectors FAT-fs (loop2): Can't find a valid FAT filesystem ------------[ cut here ]------------ kernel BUG at mm/vmscan.c:593! invalid opcode: 0000 [#1] SMP KASAN ------------[ cut here ]------------ 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