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authorHerbert Xu <herbert@gondor.apana.org.au>2010-01-10 20:15:03 +1100
committerGreg Kroah-Hartman <gregkh@suse.de>2010-03-02 14:54:13 -0800
commitf7410ced7f931bb1ad79d1336412cf7b7a33cb14 (patch)
treec25966dee9bb112a8e9495cd161a4db95c1785a7 /drivers/usb/musb
parentd23356da714595b888686d22cd19061323c09190 (diff)
USB: Move hcd free_dev call into usb_disconnect to fix oops
USB: Move hcd free_dev call into usb_disconnect I found a way to oops the kernel: 1. Open a USB device through devio. 2. Remove the hcd module in the host kernel. 3. Close the devio file descriptor. The problem is that closing the file descriptor does usb_release_dev as it is the last reference. usb_release_dev then tries to invoke the hcd free_dev function (or rather dereferencing the hcd driver struct). This causes an oops as the hcd driver has already been unloaded so the struct is gone. This patch tries to fix this by bringing the free_dev call earlier and into usb_disconnect. I have verified that repeating the above steps no longer crashes with this patch applied. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/musb')
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