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[Bug 2015213] [NEW] xfstests ext4/054 will BUG_ON

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Public bug reported:

When running xfstests ext4/054 test, the kernel will BUG_ON. This
requires a mangled filesystem (the test uses debugfs, the tool, not the
kernel filesystem).

[23967.165615] ------------[ cut here ]------------
[23967.169587] kernel BUG at /build/linux-aws-wwoDm1/linux-aws-4.4.0/fs/ext4/mballoc.c:3222!
[23967.169587] invalid opcode: 0000 [#1] SMP 
[23967.169587] Modules linked in: binfmt_misc serio_raw ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd
[23967.169587] CPU: 0 PID: 4559 Comm: xfs_io Not tainted 4.4.0-1155-aws #170-Ubuntu
[23967.169587] Hardware name: Xen HVM domU, BIOS 4.2.amazon 08/24/2006
[23967.169587] task: ffff8800cce02a00 ti: ffff8800d43f4000 task.ti: ffff8800d43f4000
[23967.169587] RIP: 0010:[<ffffffff812dec7e>]  [<ffffffff812dec7e>] ext4_mb_normalize_request.constprop.29+0x40e/0x4c0
[23967.169587] RSP: 0018:ffff8800d43f7860  EFLAGS: 00010246
[23967.169587] RAX: 0000000000000000 RBX: ffff8800c2fbecb8 RCX: 0000000000001500
[23967.169587] RDX: 0000000000001500 RSI: ffff8800d43f79e8 RDI: ffff8800e14b8080
[23967.169587] RBP: ffff8800d43f78b0 R08: 000000000000000a R09: 0000000000000001
[23967.169587] R10: 0000000000000001 R11: 0000000000000800 R12: ffff8800e14b8080
[23967.169587] R13: 0000000000000000 R14: 0000000000001500 R15: ffff8800c2fbecb8
[23967.169587] FS:  00007fec45ce6700(0000) GS:ffff88010b200000(0000) knlGS:0000000000000000
[23967.169587] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[23967.169587] CR2: 0000000001250000 CR3: 00000000c0e8a000 CR4: 0000000000160670
[23967.169587] Stack:
[23967.169587]  ffff8800d43f79e8 0000000000000000 ffff8800c2fbea60 ffff8800e559c800
[23967.169587]  0000150000000000 ffff8800e559c800 ffff8800d43f79c4 ffff8800e5599800
[23967.169587]  ffff8800d43f79e8 ffff8800e14b8080 ffff8800d43f7960 ffffffff812e5096
[23967.169587] Call Trace:
[23967.169587]  [<ffffffff812e5096>] ext4_mb_new_blocks+0x5d6/0xac0
[23967.169587]  [<ffffffff812d394d>] ? __read_extent_tree_block+0xcd/0x140
[23967.169587]  [<ffffffff812d3c57>] ? ext4_ext_search_right+0x297/0x2f0
[23967.169587]  [<ffffffff812d3c57>] ? ext4_ext_search_right+0x297/0x2f0
[23967.169587]  [<ffffffff812d997d>] ext4_ext_map_blocks+0x63d/0xfe0
[23967.169587]  [<ffffffff818414a1>] ? __schedule+0x341/0x810
[23967.169587]  [<ffffffff81400001>] ? cfq_group_served+0x3e1/0x4b0
[23967.169587]  [<ffffffff812a7dd4>] ext4_map_blocks+0x1b4/0x5b0
[23967.169587]  [<ffffffff811f6ddc>] ? kmem_cache_alloc+0x1cc/0x1f0
[23967.169587]  [<ffffffff812511e1>] ? alloc_buffer_head+0x21/0x60
[23967.169587]  [<ffffffff812a828e>] _ext4_get_block+0xbe/0x220
[23967.169587]  [<ffffffff812a8406>] ext4_get_block+0x16/0x20
[23967.169587]  [<ffffffff812a6783>] ext4_block_write_begin+0x193/0x4e0
[23967.169587]  [<ffffffff812a83f0>] ? _ext4_get_block+0x220/0x220
[23967.169587]  [<ffffffff812dc65d>] ? __ext4_journal_start_sb+0x6d/0x120
[23967.169587]  [<ffffffff812aca7a>] ext4_write_begin+0x19a/0x460
[23967.169587]  [<ffffffff81195ebe>] generic_perform_write+0xce/0x1d0
[23967.169587]  [<ffffffff812347cc>] ? file_update_time+0xcc/0x110
[23967.169587]  [<ffffffff81197622>] __generic_file_write_iter+0x1a2/0x1e0
[23967.169587]  [<ffffffff812a0f24>] ext4_file_write_iter+0x1c4/0x4b0
[23967.169587]  [<ffffffff8120cea9>] ? mem_cgroup_try_charge+0x69/0x1d0
[23967.169587]  [<ffffffff811a7067>] ? lru_cache_add_active_or_unevictable+0x27/0xa0
[23967.169587]  [<ffffffff81218765>] new_sync_write+0xa5/0xf0
[23967.169587]  [<ffffffff812187d9>] __vfs_write+0x29/0x40
[23967.169587]  [<ffffffff81218f69>] vfs_write+0xa9/0x1a0
[23967.169587]  [<ffffffff81219e15>] SyS_pwrite64+0x95/0xb0
[23967.169587]  [<ffffffff818464db>] entry_SYSCALL_64_fastpath+0x22/0xd0
[23967.169587] Code: d0 49 29 c5 e9 ca fd ff ff 41 bd 00 80 00 00 e9 8e fd ff ff 8b 56 10 31 c0 e9 70 fd ff ff 0f 0b 41 bd 00 00 01 00 e9 77 fd ff ff <0f> 0b 0f 0b 0f 0b 41 bd 00 00 02 00 e9 66 fd ff ff 0f 0b 41 bd 
[23967.169587] RIP  [<ffffffff812dec7e>] ext4_mb_normalize_request.constprop.29+0x40e/0x4c0
[23967.169587]  RSP <ffff8800d43f7860>
[23967.533188] ---[ end trace 7e0e603d5fd1fa33 ]---

** Affects: ubuntu-kernel-tests
     Importance: Medium
         Status: Triaged

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Invalid

** Affects: linux (Ubuntu Xenial)
     Importance: Undecided
         Status: Opinion

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu Xenial)
       Status: New => Opinion

** Changed in: linux (Ubuntu)
       Status: New => Invalid

** Also affects: ubuntu-kernel-tests
   Importance: Undecided
       Status: New

** Changed in: ubuntu-kernel-tests
       Status: New => Triaged

** Changed in: ubuntu-kernel-tests
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/2015213

Title:
  xfstests ext4/054 will BUG_ON

Status in ubuntu-kernel-tests:
  Triaged
Status in linux package in Ubuntu:
  Invalid
Status in linux source package in Xenial:
  Opinion

Bug description:
  When running xfstests ext4/054 test, the kernel will BUG_ON. This
  requires a mangled filesystem (the test uses debugfs, the tool, not
  the kernel filesystem).

  [23967.165615] ------------[ cut here ]------------
  [23967.169587] kernel BUG at /build/linux-aws-wwoDm1/linux-aws-4.4.0/fs/ext4/mballoc.c:3222!
  [23967.169587] invalid opcode: 0000 [#1] SMP 
  [23967.169587] Modules linked in: binfmt_misc serio_raw ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd
  [23967.169587] CPU: 0 PID: 4559 Comm: xfs_io Not tainted 4.4.0-1155-aws #170-Ubuntu
  [23967.169587] Hardware name: Xen HVM domU, BIOS 4.2.amazon 08/24/2006
  [23967.169587] task: ffff8800cce02a00 ti: ffff8800d43f4000 task.ti: ffff8800d43f4000
  [23967.169587] RIP: 0010:[<ffffffff812dec7e>]  [<ffffffff812dec7e>] ext4_mb_normalize_request.constprop.29+0x40e/0x4c0
  [23967.169587] RSP: 0018:ffff8800d43f7860  EFLAGS: 00010246
  [23967.169587] RAX: 0000000000000000 RBX: ffff8800c2fbecb8 RCX: 0000000000001500
  [23967.169587] RDX: 0000000000001500 RSI: ffff8800d43f79e8 RDI: ffff8800e14b8080
  [23967.169587] RBP: ffff8800d43f78b0 R08: 000000000000000a R09: 0000000000000001
  [23967.169587] R10: 0000000000000001 R11: 0000000000000800 R12: ffff8800e14b8080
  [23967.169587] R13: 0000000000000000 R14: 0000000000001500 R15: ffff8800c2fbecb8
  [23967.169587] FS:  00007fec45ce6700(0000) GS:ffff88010b200000(0000) knlGS:0000000000000000
  [23967.169587] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [23967.169587] CR2: 0000000001250000 CR3: 00000000c0e8a000 CR4: 0000000000160670
  [23967.169587] Stack:
  [23967.169587]  ffff8800d43f79e8 0000000000000000 ffff8800c2fbea60 ffff8800e559c800
  [23967.169587]  0000150000000000 ffff8800e559c800 ffff8800d43f79c4 ffff8800e5599800
  [23967.169587]  ffff8800d43f79e8 ffff8800e14b8080 ffff8800d43f7960 ffffffff812e5096
  [23967.169587] Call Trace:
  [23967.169587]  [<ffffffff812e5096>] ext4_mb_new_blocks+0x5d6/0xac0
  [23967.169587]  [<ffffffff812d394d>] ? __read_extent_tree_block+0xcd/0x140
  [23967.169587]  [<ffffffff812d3c57>] ? ext4_ext_search_right+0x297/0x2f0
  [23967.169587]  [<ffffffff812d3c57>] ? ext4_ext_search_right+0x297/0x2f0
  [23967.169587]  [<ffffffff812d997d>] ext4_ext_map_blocks+0x63d/0xfe0
  [23967.169587]  [<ffffffff818414a1>] ? __schedule+0x341/0x810
  [23967.169587]  [<ffffffff81400001>] ? cfq_group_served+0x3e1/0x4b0
  [23967.169587]  [<ffffffff812a7dd4>] ext4_map_blocks+0x1b4/0x5b0
  [23967.169587]  [<ffffffff811f6ddc>] ? kmem_cache_alloc+0x1cc/0x1f0
  [23967.169587]  [<ffffffff812511e1>] ? alloc_buffer_head+0x21/0x60
  [23967.169587]  [<ffffffff812a828e>] _ext4_get_block+0xbe/0x220
  [23967.169587]  [<ffffffff812a8406>] ext4_get_block+0x16/0x20
  [23967.169587]  [<ffffffff812a6783>] ext4_block_write_begin+0x193/0x4e0
  [23967.169587]  [<ffffffff812a83f0>] ? _ext4_get_block+0x220/0x220
  [23967.169587]  [<ffffffff812dc65d>] ? __ext4_journal_start_sb+0x6d/0x120
  [23967.169587]  [<ffffffff812aca7a>] ext4_write_begin+0x19a/0x460
  [23967.169587]  [<ffffffff81195ebe>] generic_perform_write+0xce/0x1d0
  [23967.169587]  [<ffffffff812347cc>] ? file_update_time+0xcc/0x110
  [23967.169587]  [<ffffffff81197622>] __generic_file_write_iter+0x1a2/0x1e0
  [23967.169587]  [<ffffffff812a0f24>] ext4_file_write_iter+0x1c4/0x4b0
  [23967.169587]  [<ffffffff8120cea9>] ? mem_cgroup_try_charge+0x69/0x1d0
  [23967.169587]  [<ffffffff811a7067>] ? lru_cache_add_active_or_unevictable+0x27/0xa0
  [23967.169587]  [<ffffffff81218765>] new_sync_write+0xa5/0xf0
  [23967.169587]  [<ffffffff812187d9>] __vfs_write+0x29/0x40
  [23967.169587]  [<ffffffff81218f69>] vfs_write+0xa9/0x1a0
  [23967.169587]  [<ffffffff81219e15>] SyS_pwrite64+0x95/0xb0
  [23967.169587]  [<ffffffff818464db>] entry_SYSCALL_64_fastpath+0x22/0xd0
  [23967.169587] Code: d0 49 29 c5 e9 ca fd ff ff 41 bd 00 80 00 00 e9 8e fd ff ff 8b 56 10 31 c0 e9 70 fd ff ff 0f 0b 41 bd 00 00 01 00 e9 77 fd ff ff <0f> 0b 0f 0b 0f 0b 41 bd 00 00 02 00 e9 66 fd ff ff 0f 0b 41 bd 
  [23967.169587] RIP  [<ffffffff812dec7e>] ext4_mb_normalize_request.constprop.29+0x40e/0x4c0
  [23967.169587]  RSP <ffff8800d43f7860>
  [23967.533188] ---[ end trace 7e0e603d5fd1fa33 ]---

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