https://bugzilla.kernel.org/show_bug.cgi?id=74341 Bug ID: 74341 Summary: WARNING: CPU: 4 PID: 3686 at fs/sysfs/group.c:216 sysfs_remove_group Product: IO/Storage Version: 2.5 Kernel Version: 3.14.1 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: SCSI Assignee: linux-scsi@xxxxxxxxxxxxxxx Reporter: casteyde.christian@xxxxxxx Regression: No Kernel 3.14.1 Core i7 64 bits / 6GB GCC 4.8.2 I recently got this warning while accessing an external HDD driver connected via USB to the laptop: sd 8:0:0:0: [sdc] Attached SCSI disk usb 4-2: USB disconnect, device number 3 ------------[ cut here ]------------ WARNING: CPU: 4 PID: 3686 at fs/sysfs/group.c:216 sysfs_remove_group+0x8b/0x90() sysfs group ffffffff81b96ea0 not found for kobject 'target8:0:0' Modules linked in: CPU: 4 PID: 3686 Comm: umount Not tainted 3.14.1 #1 Hardware name: Acer Aspire 7750G/JE70_HR, BIOS V1.07 03/02/2011 0000000000000009 ffff880075821b18 ffffffff817fd0d1 ffff880075821b60 ffff880075821b50 ffffffff81079003 0000000000000000 ffffffff81b96ea0 ffff8801a6fe3c38 ffff8801a11c5190 ffff8800aabb5800 ffff880075821bb0 Call Trace: [<ffffffff817fd0d1>] dump_stack+0x4d/0x6f [<ffffffff81079003>] warn_slowpath_common+0x73/0x90 [<ffffffff81079067>] warn_slowpath_fmt+0x47/0x50 [<ffffffff81195953>] ? kernfs_find_and_get_ns+0x43/0x50 [<ffffffff811945db>] sysfs_remove_group+0x8b/0x90 [<ffffffff814901be>] dpm_sysfs_remove+0x3e/0x50 [<ffffffff81487150>] device_del+0x40/0x1b0 [<ffffffff814aac92>] scsi_target_reap_usercontext+0x22/0x30 [<ffffffff8108e12f>] execute_in_process_context+0x5f/0x70 [<ffffffff814abf1c>] scsi_target_reap+0xbc/0xe0 [<ffffffff814add68>] scsi_device_dev_release_usercontext+0x188/0x1c0 [<ffffffff8108e12f>] execute_in_process_context+0x5f/0x70 [<ffffffff814adbd7>] scsi_device_dev_release+0x17/0x20 [<ffffffff8148678d>] device_release+0x2d/0xa0 [<ffffffff812e7358>] kobject_cleanup+0x38/0x70 [<ffffffff812e7240>] kobject_put+0x30/0x60 [<ffffffff81486b32>] put_device+0x12/0x20 [<ffffffff814a1f06>] scsi_device_put+0x36/0x50 [<ffffffff814b124b>] scsi_disk_put+0x2b/0x40 [<ffffffff814b21bc>] sd_release+0x2c/0x60 [<ffffffff81162dbc>] __blkdev_put+0x16c/0x1a0 [<ffffffff81162d59>] __blkdev_put+0x109/0x1a0 [<ffffffff81163679>] blkdev_put+0x49/0x130 [<ffffffff8113292f>] kill_block_super+0x3f/0x70 [<ffffffff81228a92>] fuse_kill_sb_blk+0x42/0x50 [<ffffffff81132bcd>] deactivate_locked_super+0x2d/0x50 [<ffffffff81133161>] deactivate_super+0x41/0x60 [<ffffffff8114d0f0>] mntput_no_expire+0xe0/0x170 [<ffffffff8114e2cc>] SyS_umount+0x8c/0x3a0 [<ffffffff810870e2>] ? SyS_rt_sigprocmask+0x62/0xb0 [<ffffffff818056a2>] system_call_fastpath+0x16/0x1b ---[ end trace adb70c2dc2d071d1 ]--- usb 4-2: new SuperSpeed USB device number 4 using xhci_hcd usb 4-2: Parent hub missing LPM exit latency info. Power management will be impacted. usb 4-2: New USB device found, idVendor=0480, idProduct=a006 usb 4-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 4-2: Product: External USB 3.0 usb 4-2: Manufacturer: Toshiba usb 4-2: SerialNumber: 2012030662297 usb-storage 4-2:1.0: USB Mass Storage device detected scsi9 : usb-storage 4-2:1.0 scsi 9:0:0:0: Direct-Access TOSHIBA External USB 3.0 0001 PQ: 0 ANSI: 6 sd 9:0:0:0: Attached scsi generic sg3 type 0 sd 9:0:0:0: [sdc] 1953525168 512-byte logical blocks: (1.00 TB/931 GiB) sd 9:0:0:0: [sdc] Write Protect is off sd 9:0:0:0: [sdc] Mode Sense: 33 00 00 08 sd 9:0:0:0: [sdc] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA sdc: sdc1 sd 9:0:0:0: [sdc] Attached SCSI disk The disk seemed to go to sleep and disconnect while I was looking at files on it. Then I tried to remount it. I looked at dmesg after so I don't know when exactly the warning occurred. -- You are receiving this mail because: You are the assignee for the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
