System crashed because khubd accessed an illegal address during system shutdown in Red Hat Enterprise Linux 6

Solution Verified - Updated -

Issue

  • Kernel crash while shutting down USB
  • System crashed with khubd panic message during system shutdown, RIP sysfs_find_dirent:
BUG: unable to handle kernel paging request at 0000000053df42e7
IP: [<ffffffff811e61c9>] sysfs_find_dirent+0x29/0x50
PGD 0
Oops: 0000 [#1] SMP
last sysfs file: /sys/devices/pci0000:00/0000:00:1c.0/0000:07:00.0/net/eth0/address
:
<snip>
:
Pid: 43, comm: khubd Tainted: P           ----------------   2.6.32-131.21.1.el6.x86_64 #1 PRIMER
GY RX300 S7
RIP: 0010:[<ffffffff811e61c9>]  [<ffffffff811e61c9>] sysfs_find_dirent+0x29/0x50
RSP: 0018:ffff88046bad99b0  EFLAGS: 00010206
  • System crash with khubd panic RIP sysfs_addrm_start during shutdown
[ 1649.683430] usb 2-3: USB disconnect, device number 2
[ 1649.703914] BUG: unable to handle kernel paging request at ffffffff00000079
[ 1649.711011] IP: [<ffffffff811fa69d>] sysfs_addrm_start+0x3d/0xd0
...
[ 1649.779703] Pid: 207, comm: khubd Not tainted 2.6.32-358.6.1.el6.x86_64 #1 IBM BladeCenter HS22V -[7871AC1]-/94Y5944
[ 1649.790456] RIP: 0010:[<ffffffff811fa69d>]  [<ffffffff811fa69d>] sysfs_addrm_start+0x3d/0xd0
...
[ 1649.910160] Call Trace:
[ 1649.912696]  [<ffffffff811f8d88>] sysfs_hash_and_remove+0x38/0x90
[ 1649.918865]  [<ffffffff811fbca1>] sysfs_remove_link+0x21/0x30
[ 1649.924697]  [<ffffffff8135b775>] device_remove_sys_dev_entry+0x65/0x90
[ 1649.931396]  [<ffffffff8135bc70>] device_del+0x1b0/0x1e0
[ 1649.936791]  [<ffffffff813afd25>] usb_disconnect+0x105/0x200
[ 1649.942533]  [<ffffffff813b1cec>] hub_thread+0x69c/0x1a00
[ 1649.966198]  [<ffffffff81096936>] kthread+0x96/0xa0
[ 1649.971165]  [<ffffffff8100c0ca>] child_rip+0xa/0x20

Environment

  • Red Hat Enterprise Linux 6
    • At least 6.1 - 6.4 kernels
    • Seen on kernel 2.6.32-131.21.1.el6, 2.6.32-220.el6, and 2.6.32-358.6.1.el6
  • USB device plugged in
  • System shutdown

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