Additional info: reporter: libreport-2.3.0 WARNING: CPU: 0 PID: 11290 at fs/block_dev.c:67 bdev_inode_switch_bdi+0x62/0x90() Modules linked in: vfat fat uas usb_storage 8021q garp mrp uinput tun rfcomm fuse hidp nf_conntrack_netbios_ns nf_conntrack_broadcast ccm ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter bnep ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw uvcvideo videobuf2_vmalloc videobuf2_core videobuf2_memops v4l2_common videodev media btusb bluetooth coretemp kvm_intel iTCO_wdt iTCO_vendor_support kvm gpio_ich arc4 snd_hda_codec_conexant snd_hda_codec_generic joydev i2c_i801 serio_raw iwldvm mac80211 lpc_ich mfd_core snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep iwlwifi snd_seq snd_seq_device snd_pcm cfg80211 snd_timer shpchp snd ideapad_laptop soundcore sparse_keymap rfkill acpi_cpufreq binfmt_misc i915 tg3 i2c_algo_bit drm_kms_helper drm ptp pps_core video ecryptfs encrypted_keys trusted tpm i2c_dev CPU: 0 PID: 11290 Comm: umount Not tainted 3.18.0-0.rc6.git0.1.fc22.x86_64 #1 Hardware name: LENOVO 20023 /NITU1, BIOS 18CN46WW(V2.55) 05/21/2010 0000000000000000 00000000a4a0c21d ffff880194ec3d68 ffffffff8175b4e6 0000000000000000 0000000000000000 ffff880194ec3da8 ffffffff81099161 0000000000000000 ffff880236c247f8 ffff880236c24770 ffffffff81c6f600 Call Trace: [<ffffffff8175b4e6>] dump_stack+0x46/0x58 [<ffffffff81099161>] warn_slowpath_common+0x81/0xa0 [<ffffffff8109927a>] warn_slowpath_null+0x1a/0x20 [<ffffffff8124e522>] bdev_inode_switch_bdi+0x62/0x90 [<ffffffff8124f198>] __blkdev_put+0x78/0x1c0 [<ffffffff8124fc60>] blkdev_put+0x50/0x140 [<ffffffff81217421>] kill_block_super+0x41/0x80 [<ffffffff81217769>] deactivate_locked_super+0x49/0x60 [<ffffffff81217bbc>] deactivate_super+0x6c/0x80 [<ffffffff81235b03>] cleanup_mnt+0x43/0xa0 [<ffffffff81235bb2>] __cleanup_mnt+0x12/0x20 [<ffffffff810b6544>] task_work_run+0xd4/0xf0 [<ffffffff81013e27>] do_notify_resume+0x97/0xb0 [<ffffffff817624c7>] int_signal+0x12/0x17 Potential duplicate: bug 1167001
Created attachment 962777 [details] File: dmesg
*** This bug has been marked as a duplicate of bug 1167001 ***
I had this too I undocked with a USB drive still mounted (on a dock connector)