• Darrick J. Wong's avatar
    btrfs: Fix crash due to not allocating integrity data for a bioset · b208c2f7
    Darrick J. Wong authored
    When btrfs creates a bioset, we must also allocate the integrity data pool.
    Otherwise btrfs will crash when it tries to submit a bio to a checksumming
    disk:
    
     BUG: unable to handle kernel NULL pointer dereference at 0000000000000018
     IP: [<ffffffff8111e28a>] mempool_alloc+0x4a/0x150
     PGD 2305e4067 PUD 23063d067 PMD 0
     Oops: 0000 [#1] PREEMPT SMP
     Modules linked in: btrfs scsi_debug xfs ext4 jbd2 ext3 jbd mbcache
    sch_fq_codel eeprom lpc_ich mfd_core nfsd exportfs auth_rpcgss af_packet
    raid6_pq xor zlib_deflate libcrc32c [last unloaded: scsi_debug]
     CPU: 1 PID: 4486 Comm: mount Not tainted 3.12.0-rc1-mcsum #2
     Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
     task: ffff8802451c9720 ti: ffff880230698000 task.ti: ffff880230698000
     RIP: 0010:[<ffffffff8111e28a>]  [<ffffffff8111e28a>] mempool_alloc+0x4a/0x150
     RSP: 0018:ffff880230699688  EFLAGS: 00010286
     RAX: 0000000000000001 RBX: 0000000000000000 RCX: 00000000005f8445
     RDX: 0000000000000001 RSI: 0000000000000010 RDI: 0000000000000000
     RBP: ffff8802306996f8 R08: 0000000000011200 R09: 0000000000000008
     R10: 0000000000000020 R11: ffff88009d6e8000 R12: 0000000000011210
     R13: 0000000000000030 R14: ffff8802306996b8 R15: ffff8802451c9720
     FS:  00007f25b8a16800(0000) GS:ffff88024fc80000(0000) knlGS:0000000000000000
     CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
     CR2: 0000000000000018 CR3: 0000000230576000 CR4: 00000000000007e0
     Stack:
      ffff8802451c9720 0000000000000002 ffffffff81a97100 0000000000281250
      ffffffff81a96480 ffff88024fc99150 ffff880228d18200 0000000000000000
      0000000000000000 0000000000000040 ffff880230e8c2e8 ffff8802459dc900
     Call Trace:
      [<ffffffff811b2208>] bio_integrity_alloc+0x48/0x1b0
      [<ffffffff811b26fc>] bio_integrity_prep+0xac/0x360
      [<ffffffff8111e298>] ? mempool_alloc+0x58/0x150
      [<ffffffffa03e8041>] ? alloc_extent_state+0x31/0x110 [btrfs]
      [<ffffffff81241579>] blk_queue_bio+0x1c9/0x460
      [<ffffffff8123e58a>] generic_make_request+0xca/0x100
      [<ffffffff8123e639>] submit_bio+0x79/0x160
      [<ffffffffa03f865e>] btrfs_map_bio+0x48e/0x5b0 [btrfs]
      [<ffffffffa03c821a>] btree_submit_bio_hook+0xda/0x110 [btrfs]
      [<ffffffffa03e7eba>] submit_one_bio+0x6a/0xa0 [btrfs]
      [<ffffffffa03ef450>] read_extent_buffer_pages+0x250/0x310 [btrfs]
      [<ffffffff8125eef6>] ? __radix_tree_preload+0x66/0xf0
      [<ffffffff8125f1c5>] ? radix_tree_insert+0x95/0x260
      [<ffffffffa03c66f6>] btree_read_extent_buffer_pages.constprop.128+0xb6/0x120
    [btrfs]
      [<ffffffffa03c8c1a>] read_tree_block+0x3a/0x60 [btrfs]
      [<ffffffffa03caefd>] open_ctree+0x139d/0x2030 [btrfs]
      [<ffffffffa03a282a>] btrfs_mount+0x53a/0x7d0 [btrfs]
      [<ffffffff8113ab0b>] ? pcpu_alloc+0x8eb/0x9f0
      [<ffffffff81167305>] ? __kmalloc_track_caller+0x35/0x1e0
      [<ffffffff81176ba0>] mount_fs+0x20/0xd0
      [<ffffffff81191096>] vfs_kern_mount+0x76/0x120
      [<ffffffff81193320>] do_mount+0x200/0xa40
      [<ffffffff81135cdb>] ? strndup_user+0x5b/0x80
      [<ffffffff81193bf0>] SyS_mount+0x90/0xe0
      [<ffffffff8156d31d>] system_call_fastpath+0x1a/0x1f
     Code: 4c 8d 75 a8 4c 89 6d e8 45 89 e0 4c 8d 6f 30 48 89 5d d8 41 83 e0 af 48
    89 fb 49 83 c6 18 4c 89 7d f8 65 4c 8b 3c 25 c0 b8 00 00 <48> 8b 73 18 44 89 c7
    44 89 45 98 ff 53 20 48 85 c0 48 89 c2 74
     RIP  [<ffffffff8111e28a>] mempool_alloc+0x4a/0x150
      RSP <ffff880230699688>
     CR2: 0000000000000018
     ---[ end trace 7a96042017ed21e2 ]---
    Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
    Signed-off-by: default avatarJosef Bacik <jbacik@fusionio.com>
    Signed-off-by: default avatarChris Mason <chris.mason@fusionio.com>
    b208c2f7
extent_io.c 131 KB