Dan Kruchinin napsal(a): > Hi. > > There is a BUG message from SLUB during boot process: > -- > May 21 05:39:10 midgard kernel: [ 31.177484] BUG: at > include/linux/slub_def.h:77 kmalloc_index() > May 21 05:39:10 midgard kernel: [ 31.178355] [<c01062ca>] > show_trace_log_lvl+0x1a/0x30 > May 21 05:39:10 midgard kernel: [ 31.179263] [<c0106e72>] show_trace > +0x12/0x20 > May 21 05:39:10 midgard kernel: [ 31.180177] [<c0106ee6>] dump_stack > +0x16/0x20 > May 21 05:39:10 midgard kernel: [ 31.181094] [<c018440d>] get_slab > +0x1cd/0x260 > May 21 05:39:10 midgard kernel: [ 31.182024] [<c0185809>] > __kmalloc_track_caller+0x19/0xa0 > May 21 05:39:10 midgard kernel: [ 31.183019] [<c0170059>] __kzalloc > +0x19/0x50 > May 21 05:39:10 midgard kernel: [ 31.184012] [<df05586e>] > usb_get_configuration+0x9de/0x11c0 [usbcore] > May 21 05:39:10 midgard kernel: [ 31.185115] [<df04cd07>] > usb_new_device+0x17/0x190 [usbcore] > May 21 05:39:10 midgard kernel: [ 31.186181] [<df04e68a>] hub_thread > +0x79a/0xfd0 [usbcore] > May 21 05:39:10 midgard kernel: [ 31.187185] [<c013b8e2>] kthread > +0x42/0x70 > May 21 05:39:10 midgard kernel: [ 31.188190] [<c0105ea7>] > kernel_thread_helper+0x7/0x10 > -- > > kzalloc(0, GFP_KERNEL) occurs in drivers/usb/core/config.c in > usb_get_configuration function. I already wrote about this slub bug > report and offered a > patch(http://www.uwsg.iu.edu/hypermail/linux/kernel/0705.1/0154.html). I > don't know, may be it is not major thing, if it is, just ignore it. I > just think, that > -- > length = ncfg * sizeof(struct usb_host_config); > dev->config = kzalloc(length, GFP_KERNEL); > -- > isn't clear, because ncfg - in my case - is 0 and I suppose, that size > of the leastest slab cache can become(in future) smaller than > sizeof(struct usb_host_config).
There is yet another patch for this: http://lkml.org/lkml/2007/5/19/171 sitting here: http://kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/gregkh-03-usb/usb-don-t-try-to-kzalloc-0-bytes.patch regards, -- http://www.fi.muni.cz/~xslaby/ Jiri Slaby faculty of informatics, masaryk university, brno, cz e-mail: jirislaby gmail com, gpg pubkey fingerprint: B674 9967 0407 CE62 ACC8 22A0 32CC 55C3 39D4 7A7E - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
