On Wed, 28 Aug 2013, Richard Ryniker wrote: > https://bugzilla.redhat.com/show_bug.cgi?id=1001806 > > Aug 26 16:11:36 localhost kernel: ------------[ cut here ]------------ > Aug 26 16:11:36 localhost kernel: WARNING: CPU: 0 PID: 54 at > lib/dma-debug.c:950 check_for_stack+0xa0/0x100() > Aug 26 16:11:36 localhost kernel: ehci-pci 0000:00:1a.0: DMA-API: device > driver maps memory fromstack [addr=ffff880427629376] > Aug 26 16:11:36 localhost kernel: Modules linked in: floppy(+) scsi_dh_rdac > scsi_dh_hp_sw scsi_dh_emc scsi_dh_alua iscsi_tcp libiscsi_tcp libiscsi > scsi_transport_iscsi squashfs cramfs edd dm_multipath > Aug 26 16:11:36 localhost kernel: CPU: 0 PID: 54 Comm: khubd Not tainted > 3.11.0-0.rc6.git4.1.fc20.x86_64 #1 > Aug 26 16:11:36 localhost kernel: Hardware name: LENOVO 7745/7745, BIOS > DUKT31AUS 05/23/2011 > Aug 26 16:11:36 localhost kernel: 0000000000000009 ffff880427629028 > ffffffff81723846 ffff880427629070 > Aug 26 16:11:36 localhost kernel: ffff880427629060 ffffffff8107464d > ffff880427f9c5b8 ffff88042752bae0 > Aug 26 16:11:36 localhost kernel: ffff880427629376 ffff880427f9c5b8 > ffffffff81c27440 ffff8804276290c0 > Aug 26 16:11:36 localhost kernel: Call Trace: > Aug 26 16:11:36 localhost kernel: [<ffffffff81723846>] dump_stack+0x54/0x74 > Aug 26 16:11:36 localhost kernel: [<ffffffff8107464d>] > warn_slowpath_common+0x7d/0xa0 > Aug 26 16:11:36 localhost kernel: [<ffffffff810746bc>] > warn_slowpath_fmt+0x4c/0x50 > Aug 26 16:11:36 localhost kernel: [<ffffffff81392550>] > check_for_stack+0xa0/0x100 > Aug 26 16:11:36 localhost kernel: [<ffffffff813928f0>] > debug_dma_map_page+0x100/0x140 > Aug 26 16:11:36 localhost kernel: [<ffffffff815029d0>] > usb_hcd_map_urb_for_dma+0x5d0/0x700 > Aug 26 16:11:36 localhost kernel: [<ffffffff81502d95>] > usb_hcd_submit_urb+0x295/0x8f0 > Aug 26 16:11:36 localhost kernel: [<ffffffff810e434c>] ? > lockdep_init_map+0xac/0x4a0 > Aug 26 16:11:36 localhost kernel: [<ffffffff815043b5>] > usb_submit_urb+0x155/0x3d0 > Aug 26 16:11:36 localhost kernel: [<ffffffff81504dc4>] > usb_start_wait_urb+0x74/0x190 > Aug 26 16:11:36 localhost kernel: [<ffffffff811cfe41>] ? > kmem_cache_alloc_trace+0x111/0x350 > Aug 26 16:11:36 localhost kernel: [<ffffffff81504fa5>] > usb_control_msg+0xc5/0x110 > Aug 26 16:11:36 localhost kernel: [<ffffffff815b2164>] > usbhid_get_raw_report+0x94/0xb0 > Aug 26 16:11:36 localhost kernel: [<ffffffff815a6fbd>] > hidinput_get_battery_property+0x6d/0x100 This is where the bug lies. hidinput_get_battery_property() needs to allocate a buffer with kmalloc() instead of using on that's on the stack. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
