------------[ cut here ]------------
WARNING: at fs/ext4/inode.c:3223 ext4_ext_direct_IO+0x2cb/0x3c0()
Modules linked in: cpufreq_ondemand usb_storage acpi_cpufreq freq_table mperf coretemp kvm_intel kvm crc32c_intel ghash_clmulni_intel microcode sg xhci_hcd button sd_mod crc_t10dif aesni_intel ablk_helper cryptd lrw gf128mul glue_helper aes_x86_64 ahci libahci pata_acpi ata_generic dm_mirror dm_region_hash dm_log dm_mod
CPU: 3 PID: 30537 Comm: fio Not tainted 3.9.0+ #14
Hardware name:                  /DQ67SW, BIOS SWQ6710H.86A.0052.2011.0520.1802 05/20/2011
 ffffffff81e44ed6 ffff8801259ffa28 ffffffff818b20ff ffff8801259ffa68
 ffffffff81060a87 ffff8801259ffa58 ffff880205a921d0 ffff880233192740
 ffff880176496400 0000000000000000 ffffffffffffffe4 ffff8801259ffa78
Call Trace:
 [<ffffffff818b20ff>] dump_stack+0x19/0x22
 [<ffffffff81060a87>] warn_slowpath_common+0x87/0xb0
 [<ffffffff81060aca>] warn_slowpath_null+0x1a/0x20
 [<ffffffff813131eb>] ext4_ext_direct_IO+0x2cb/0x3c0
 [<ffffffff813161c0>] ? ext4_get_block_write_nolock+0x20/0x20
 [<ffffffff813132e0>] ? ext4_ext_direct_IO+0x3c0/0x3c0
 [<ffffffff8131ac9f>] ext4_direct_IO+0x22f/0x3c0
 [<ffffffff8118db75>] generic_file_direct_write+0x175/0x240
 [<ffffffff81191bc6>] __generic_file_aio_write+0x556/0x770
 [<ffffffff8130d2de>] ext4_file_dio_write+0x35e/0x4f0
 [<ffffffff812929b3>] ? aio_rw_vect_retry+0xc3/0x250
 [<ffffffff8130d5ae>] ext4_file_write+0x13e/0x190
 [<ffffffff8130d470>] ? ext4_file_dio_write+0x4f0/0x4f0
 [<ffffffff812929e3>] aio_rw_vect_retry+0xf3/0x250
 [<ffffffff811c7f53>] ? might_fault+0x73/0xe0
 [<ffffffff8130d470>] ? ext4_file_dio_write+0x4f0/0x4f0
 [<ffffffff812949da>] aio_run_iocb+0x25a/0x3b0
 [<ffffffff81294e26>] io_submit_one+0x2f6/0x3a0
 [<ffffffff8129512e>] do_io_submit+0x25e/0x2f0
 [<ffffffff812926b2>] ? lookup_ioctx+0xc2/0x100
 [<ffffffff812951d0>] SyS_io_submit+0x10/0x20
 [<ffffffff818c4ac2>] system_call_fastpath+0x16/0x1b
---[ end trace c96126e84d56efc2 ]---
------------[ cut here ]------------
WARNING: at fs/ext4/inode.c:3223 ext4_ext_direct_IO+0x2cb/0x3c0()
Modules linked in: cpufreq_ondemand usb_storage acpi_cpufreq freq_table mperf coretemp kvm_intel kvm crc32c_intel ghash_clmulni_intel microcode sg xhci_hcd button sd_mod crc_t10dif aesni_intel ablk_helper cryptd lrw gf128mul glue_helper aes_x86_64 ahci libahci pata_acpi ata_generic dm_mirror dm_region_hash dm_log dm_mod
CPU: 1 PID: 30539 Comm: fio Tainted: G        W    3.9.0+ #14
Hardware name:                  /DQ67SW, BIOS SWQ6710H.86A.0052.2011.0520.1802 05/20/2011
 ffffffff81e44ed6 ffff880131209a28 ffffffff818b20ff ffff880131209a68
 ffffffff81060a87 ffff880131209a58 ffff8801f5347990 ffff88022b9b7e00
 ffff88023342c508 0000000000000000 ffffffffffffffe4 ffff880131209a78
Call Trace:
 [<ffffffff818b20ff>] dump_stack+0x19/0x22
 [<ffffffff81060a87>] warn_slowpath_common+0x87/0xb0
 [<ffffffff81060aca>] warn_slowpath_null+0x1a/0x20
 [<ffffffff813131eb>] ext4_ext_direct_IO+0x2cb/0x3c0
 [<ffffffff813161c0>] ? ext4_get_block_write_nolock+0x20/0x20
 [<ffffffff813132e0>] ? ext4_ext_direct_IO+0x3c0/0x3c0
 [<ffffffff8131ac9f>] ext4_direct_IO+0x22f/0x3c0
 [<ffffffff8118db75>] generic_file_direct_write+0x175/0x240
 [<ffffffff81191bc6>] __generic_file_aio_write+0x556/0x770
 [<ffffffff8130d2de>] ext4_file_dio_write+0x35e/0x4f0
 [<ffffffff812929b3>] ? aio_rw_vect_retry+0xc3/0x250
 [<ffffffff8130d5ae>] ext4_file_write+0x13e/0x190
 [<ffffffff8130d470>] ? ext4_file_dio_write+0x4f0/0x4f0
 [<ffffffff812929e3>] aio_rw_vect_retry+0xf3/0x250
 [<ffffffff811c7f53>] ? might_fault+0x73/0xe0
 [<ffffffff8130d470>] ? ext4_file_dio_write+0x4f0/0x4f0
 [<ffffffff812949da>] aio_run_iocb+0x25a/0x3b0
 [<ffffffff81294e26>] io_submit_one+0x2f6/0x3a0
 [<ffffffff8129512e>] do_io_submit+0x25e/0x2f0
 [<ffffffff812926b2>] ? lookup_ioctx+0xc2/0x100
 [<ffffffff812951d0>] SyS_io_submit+0x10/0x20
 [<ffffffff818c4ac2>] system_call_fastpath+0x16/0x1b
---[ end trace c96126e84d56efc3 ]---
Slab corruption (Tainted: G        W   ): ext4_io_end start=ffff88023342c508, len=64
Redzone: 0x9f911029d74e35b/0x9f911029d74e35b.
Last user: [<ffffffff8131fe9b>](ext4_release_io_end+0x12b/0x130)
030: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6a 6b 6b a5  kkkkkkkkkkkkjkk.
Prev obj: start=ffff88023342c4b0, len=64
Redzone: 0xd84156c5635688c0/0xd84156c5635688c0.
Last user: [<ffffffff813200d3>](ext4_init_io_end+0x23/0x60)
000: 58 cf 42 33 02 88 ff ff c8 27 33 62 01 88 ff ff  X.B3.....'3b....
010: d0 51 a4 30 02 88 ff ff 05 00 00 00 00 00 00 00  .Q.0............
Next obj: start=ffff88023342c560, len=64
Redzone: 0xd84156c5635688c0/0xd84156c5635688c0.
Last user: [<ffffffff813200d3>](ext4_init_io_end+0x23/0x60)
000: a8 d3 1e 27 02 88 ff ff a0 8d 47 2b 02 88 ff ff  ...'......G+....
010: d0 51 a4 30 02 88 ff ff 05 00 00 00 00 00 00 00  .Q.0............
Slab corruption (Tainted: G        W   ): ext4_io_end start=ffff880176496400, len=64
Redzone: 0x9f911029d74e35b/0x9f911029d74e35b.
Last user: [<ffffffff8131fe9b>](ext4_release_io_end+0x12b/0x130)
030: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6a 6b 6b a5  kkkkkkkkkkkkjkk.
Prev obj: start=ffff8801764963a8, len=64
Redzone: 0xd84156c5635688c0/0xd84156c5635688c0.
Last user: [<ffffffff813200d3>](ext4_init_io_end+0x23/0x60)
000: a8 63 49 76 01 88 ff ff a8 63 49 76 01 88 ff ff  .cIv.....cIv....
010: 90 b9 79 2b 02 88 ff ff 00 00 00 00 00 00 00 00  ..y+............
Next obj: start=ffff880176496458, len=64
Redzone: 0x9f911029d74e35b/0x9f911029d74e35b.
Last user: [<ffffffff8131fe9b------------[ cut here ]------------