Messages in this thread Patch in this message | | | Date | Thu, 17 May 2007 11:00:56 +0900 | From | KAMEZAWA Hiroyuki <> | Subject | [PATCH] fix kmalloc(0) in arch/ia64/pci/pci.c |
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Fix following kmalloc(0) message. patch is agaisnt 2.6.22-rc1-mm1.
== BUG: at mm/slab.c:792 __find_general_cachep()
Call Trace: [<a000000100013f20>] show_stack+0x40/0xa0 sp=e000014042227b00 bsp=e000014042220f90 [<a000000100013fb0>] dump_stack+0x30/0x60 sp=e000014042227cd0 bsp=e000014042220f78 [<a00000010014fe10>] kmem_find_general_cachep+0x90/0x140 sp=e000014042227cd0 bsp=e000014042220f48 [<a0000001001504f0>] __kmalloc_node+0x30/0xa0 sp=e000014042227cd0 bsp=e000014042220f18 [<a0000001004eb700>] pci_acpi_scan_root+0x180/0x4a0 sp=e000014042227cd0 bsp=e000014042220ed0 [<a000000100361140>] acpi_pci_root_add+0x4e0/0x700 sp=e000014042227cf0 bsp=e000014042220e90 [<a00000010035b240>] acpi_device_probe+0xa0/0x160 sp=e000014042227d10 bsp=e000014042220e58 [<a0000001003e4550>] driver_probe_device+0x250/0x380 sp=e000014042227d10 bsp=e000014042220e18 [<a0000001003e4900>] __driver_attach+0xc0/0x160 sp=e000014042227d10 bsp=e000014042220de0 [<a0000001003e2980>] bus_for_each_dev+0x80/0x100 sp=e000014042227d10 bsp=e000014042220da8 [<a0000001003e4120>] driver_attach+0x40/0x60 sp=e000014042227d30 bsp=e000014042220d88 [<a0000001003e3170>] bus_add_driver+0xf0/0x3c0 sp=e000014042227d30 bsp=e000014042220d48 [<a0000001003e4e00>] driver_register+0x140/0x160 sp=e000014042227d30 bsp=e000014042220d28 [<a00000010035ded0>] acpi_bus_register_driver+0x50/0x80 sp=e000014042227d30 bsp=e000014042220d08 [<a0000001007d6000>] acpi_pci_root_init+0x20/0x60 sp=e000014042227d30 bsp=e000014042220cf0 [<a0000001007a46b0>] kernel_init+0x450/0x7c0 sp=e000014042227d30 bsp=e000014042220ca8 [<a000000100012550>] kernel_thread_helper+0x30/0x60 sp=e000014042227e30 bsp=e000014042220c80 [<a0000001000090c0>] start_kernel_thread+0x20/0x40 sp=e000014042227e30 bsp=e000014042220c80 ==
Fix kmalloc(0)
Signed-Off-By: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Index: linux-2.6.22-rc1-mm1/arch/ia64/pci/pci.c =================================================================== --- linux-2.6.22-rc1-mm1.orig/arch/ia64/pci/pci.c +++ linux-2.6.22-rc1-mm1/arch/ia64/pci/pci.c @@ -354,6 +354,8 @@ pci_acpi_scan_root(struct acpi_device *d acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_window, &windows); + if (!windows) + goto out2; controller->window = kmalloc_node(sizeof(*controller->window) * windows, GFP_KERNEL, controller->node); if (!controller->window)
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