• Jesper Juhl's avatar
    PCI: Avoid potential NULL pointer dereference in pci_scan_bridge · 7c867c88
    Jesper Juhl authored
    pci_add_new_bus() calls pci_alloc_child_bus() which calls pci_alloc_bus()
    that allocates memory dynamically with kzalloc(). The return value of
    kzalloc() is the pointer that's eventually returned from
    pci_add_new_bus(), so since kzalloc() can fail and return NULL so can
    pci_add_new_bus(). Thus we may end up dereferencing a NULL pointer in
    drivers/pci/probe.c::pci_scan_bridge(). Seems to me we should test for
    this and bail out if it happens rather than crashing.
    Also removed some trailing whitespace that bugged me while looking at
    this.
    Signed-off-by: default avatarJesper Juhl <jj@chaosbits.net>
    Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
    7c867c88
probe.c 38.8 KB