• Lubomir Rintel's avatar
    usb: gadget: gadgetfs: Initialize CHIP to NULL before UDC probe · 5cdf7d5b
    Lubomir Rintel authored
    Otherwise the value from the last probe would be retained that possibly is
    freed since (the UDC is removed) and therefore no longer relevant. Reproducible
    with the dummy UDC:
    
      modprobe dummy_hcd
      mount -t gadgetfs gadgetfs /dev/gadget
      umount /dev/gadget
      rmmod dummy_hcd
      mount -t gadgetfs gadgetfs /dev/gadget
    
    BUG: unable to handle kernel paging request at ffffffffa066fd9d
    Call Trace:
     [<ffffffff811d0cd2>] ? d_alloc_name+0x22/0x50
     [<ffffffff812b74dc>] ? selinux_d_instantiate+0x1c/0x20
     [<ffffffffa067d687>] gadgetfs_create_file+0x27/0xa0 [gadgetfs]
     [<ffffffffa067da70>] ? setup_req.isra.4+0x80/0x80 [gadgetfs]
     [<ffffffffa067dbac>] gadgetfs_fill_super+0x13c/0x180 [gadgetfs]
     [<ffffffff811bc832>] mount_single+0x92/0xc0
     [<ffffffffa067d0f8>] gadgetfs_mount+0x18/0x20 [gadgetfs]
     [<ffffffff811bc8f9>] mount_fs+0x39/0x1b0
     [<ffffffff8116b220>] ? __alloc_percpu+0x10/0x20
     [<ffffffff811d6da3>] vfs_kern_mount+0x63/0xf0
     [<ffffffff811d93be>] do_mount+0x23e/0xac0
     [<ffffffff811660eb>] ? strndup_user+0x4b/0xf0
     [<ffffffff811d9f63>] SyS_mount+0x83/0xc0
     [<ffffffff81695b69>] system_call_fastpath+0x16/0x1b
    Signed-off-by: default avatarLubomir Rintel <lkundrak@v3.sk>
    Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
    5cdf7d5b
inode.c 52.1 KB