libreport version: 2.0.10
cmdline:        BOOT_IMAGE=/vmlinuz-3.3.4-3.fc16.x86_64 root=/dev/mapper/vg_fedora-lv_root ro rd.md=0 rd.dm=0 rd.lvm.lv=vg_fedora/lv_swap quiet SYSFONT=latarcyrheb-sun16 rhgb rd.lvm.lv=vg_fedora/lv_root rd.luks=0 KEYTABLE=no LANG=en_US.UTF-8

backtrace:
:WARNING: at fs/btrfs/extent-tree.c:6170 btrfs_alloc_free_block+0x364/0x370 [btrfs]()
:Hardware name: HP Compaq 6000 Pro SFF PC
:Modules linked in: fuse target_core_mod ip6table_filter ip6_tables ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack xt_CHECKSUM iptable_mangle bridge stp llc lockd be2iscsi iscsi_boot_sysfs bnx2i cnic uio cxgb4i cxgb4 cxgb3i libcxgbi cxgb3 mdio ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi tpm_infineon snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm snd_timer vhost_net macvtap macvlan e1000e tun tpm_tis tpm tpm_bios microcode hp_wmi snd soundcore virtio_net iTCO_wdt iTCO_vendor_support sparse_keymap rfkill kvm_intel serio_raw snd_page_alloc kvm sunrpc uinput binfmt_misc btrfs zlib_deflate libcrc32c ata_generic pata_acpi wmi i915 drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan]
:Pid: 2287, comm: sendmail Not tainted 3.3.4-3.fc16.x86_64 #1
:Call Trace:
: [<ffffffff81057abf>] warn_slowpath_common+0x7f/0xc0
: [<ffffffff81057b1a>] warn_slowpath_null+0x1a/0x20
: [<ffffffffa0115514>] btrfs_alloc_free_block+0x364/0x370 [btrfs]
: [<ffffffff8112aafc>] ? __set_page_dirty_nobuffers+0xfc/0x190
: [<ffffffffa0144e9a>] ? read_extent_buffer+0xea/0x180 [btrfs]
: [<ffffffff8112063e>] ? unlock_page+0x2e/0x40
: [<ffffffffa010383f>] __btrfs_cow_block+0x12f/0x440 [btrfs]
: [<ffffffffa0103c46>] btrfs_cow_block+0xf6/0x220 [btrfs]
: [<ffffffffa0106b03>] push_leaf_right+0x133/0x190 [btrfs]
: [<ffffffffa0109535>] btrfs_del_items+0x405/0x430 [btrfs]
: [<ffffffffa016a5c4>] ? btrfs_dequeue_delayed_node+0x24/0xa0 [btrfs]
: [<ffffffffa0144e9a>] ? read_extent_buffer+0xea/0x180 [btrfs]
: [<ffffffffa012d8b6>] btrfs_truncate_inode_items+0x4b6/0x7a0 [btrfs]
: [<ffffffffa012e6e4>] btrfs_evict_inode+0x1d4/0x300 [btrfs]
: [<ffffffff811cb0e8>] ? __posix_lock_file+0x3b8/0x4d0
: [<ffffffff8119a9ff>] evict+0x9f/0x1a0
: [<ffffffff8119ac05>] iput+0x105/0x200
: [<ffffffff81196250>] dentry_iput+0xc0/0xf0
: [<ffffffff81197caa>] dput+0x10a/0x1f0
: [<ffffffff81182df6>] fput+0x176/0x220
: [<ffffffff8117f526>] filp_close+0x66/0x90
: [<ffffffff8117f5e9>] sys_close+0x99/0xf0
: [<ffffffff815fbee9>] system_call_fastpath+0x16/0x1b