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authorSergey Senozhatsky <sergey.senozhatsky@gmail.com>2011-01-19 08:25:02 -0700
committerJens Axboe <jaxboe@fusionio.com>2011-01-19 08:25:02 -0700
commitee71a968672a9951aee6014c55511007596425bc (patch)
treeeb80f98cdc1baf08d9d4863dcdaa5e91864c22a7 /include/asm-generic/tlbflush.h
parent04de96c9c6981c5957aa5db39bbdc4d958d07efa (diff)
loop: queue_lock NULL pointer derefence in blk_throtl_exit
Performing $ sudo mount -o loop -o umask=0 /dev/sdb1 /mnt/ mount: wrong fs type, bad option, bad superblock on /dev/loop0, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so $ sudo modprobe -r loop results in oops: BUG: unable to handle kernel NULL pointer dereference at 0000000000000004 IP: [<ffffffff812479d4>] do_raw_spin_lock+0x14/0x122 Process modprobe (pid: 6189, threadinfo ffff88009a898000, task ffff880154a88000) Call Trace: [<ffffffff81486788>] _raw_spin_lock_irq+0x4a/0x51 [<ffffffff8123404b>] ? blk_throtl_exit+0x3b/0xa0 [<ffffffff8105b120>] ? cancel_delayed_work_sync+0xd/0xf [<ffffffff8123404b>] blk_throtl_exit+0x3b/0xa0 [<ffffffff81229bc8>] blk_release_queue+0x21/0x65 [<ffffffff8123bb06>] kobject_release+0x51/0x66 [<ffffffff8123bab5>] ? kobject_release+0x0/0x66 [<ffffffff8123ce1e>] kref_put+0x43/0x4d [<ffffffff8123ba27>] kobject_put+0x47/0x4b [<ffffffff8122717c>] blk_cleanup_queue+0x56/0x5b [<ffffffffa01c3824>] loop_exit+0x68/0x844 [loop] [<ffffffff8107cccc>] sys_delete_module+0x1e8/0x25b [<ffffffff814864c9>] ? trace_hardirqs_on_thunk+0x3a/0x3f [<ffffffff81002112>] system_call_fastpath+0x16/0x1b because of an attempt to acquire NULL queue_lock. I added the same lines as in blk_queue_make_request - index 44e18c0..49e6a54 100644`fall back to embedded per-queue lock'. Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'include/asm-generic/tlbflush.h')
0 files changed, 0 insertions, 0 deletions