]> git.proxmox.com Git - mirror_ubuntu-focal-kernel.git/commit
usb: xhci: Fix a potential null pointer dereference in xhci_debugfs_create_endpoint()
authorJia-Ju Bai <baijiaju1990@gmail.com>
Wed, 22 May 2019 11:33:58 +0000 (14:33 +0300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 22 May 2019 12:25:37 +0000 (14:25 +0200)
commit5bce256f0b528624a34fe907db385133bb7be33e
treecbfcd8ee20b9e720cc4f8a1a752e3b106ae5a065
parent597c56e372dab2c7f79b8d700aad3a5deebf9d1b
usb: xhci: Fix a potential null pointer dereference in xhci_debugfs_create_endpoint()

In xhci_debugfs_create_slot(), kzalloc() can fail and
dev->debugfs_private will be NULL.
In xhci_debugfs_create_endpoint(), dev->debugfs_private is used without
any null-pointer check, and can cause a null pointer dereference.

To fix this bug, a null-pointer check is added in
xhci_debugfs_create_endpoint().

This bug is found by a runtime fuzzing tool named FIZZER written by us.

[subjet line change change, add potential -Mathais]
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/host/xhci-debugfs.c