On Tue, 17 Dec 2002, Linus Torvalds wrote:

| The latest USB updates seem to be buggy.
|
| My USB-2 setup that used to mostly work, now oopses in khubd in
| <storage_probe+0x541/0xb68> when I insert my CompactFlash reader into my
| external USB hub:
|
|       drivers/usb/core/hub.c: new USB device 04:07.2-3.1, assigned address 3
|       Unable to handle kernel NULL pointer dereference at virtual address 00000002
|        printing eip:
|       c03196af
|       *pde = 00000000
|       Oops: 0000
|       CPU:    1
|       EIP:    0060:[<c03196af>]    Not tainted
|       EFLAGS: 00010202
|       EIP is at storage_probe+0x541/0xb68
|       eax: 00000002   ebx: 00000000   ecx: 00000000   edx: c1b04b14
|       esi: f7c8de24   edi: f7c1b200   ebp: f7c8de50   esp: f7c8dd3c
|       ds: 0068   es: 0068   ss: 0068
|       Process khubd (pid: 14, threadinfo=f7c8c000 task=c1926680)
|       Stack: f7c1b200 00000000 00000180 00000020 00000001 00000000 f7c1b204 c18d5080
|              f7c8dd94 c0135ed5 f7ffb530 c1a7d000 00000001 00000000 c0550580 0000000a
|              c1a7d000 00000001 000001d0 00000282 000081a4 0000003c f7c8ddc8 c0136147
|       Call Trace:
|        [<c0135ed5>] cache_grow+0x183/0x27c
|        [<c0136147>] cache_alloc_refill+0x179/0x1fa
|        [<c015f2bb>] alloc_inode+0x143/0x16e
|        [<c03010f5>] usb_device_probe+0xcd/0x128
|        [<c025fb39>] bus_match+0x43/0x78
|        [<c025fbcb>] device_attach+0x5d/0x74
|        [<c025fd8d>] bus_add_device+0x7f/0xca
|        [<c025ef25>] device_add+0x103/0x15c
|        [<c0302255>] usb_new_device+0x32d/0x42a
|        [<c030419c>] usb_hub_port_connect_change+0x1c4/0x2da
|        [<c03045b0>] usb_hub_events+0x2fe/0x362
|        [<c0304649>] usb_hub_thread+0x35/0xe2
|        [<c0118e9e>] default_wake_function+0x0/0x3e
|        [<c0304614>] usb_hub_thread+0x0/0xe2
|        [<c0107355>] kernel_thread_helper+0x5/0xc
|
| Any ideas? It doesn't look USB-2 related per se, so I'm surprised if
| nobody else has seen this.

No ideas yet, but it looks very similar to
  http://bugme.osdl.org/show_bug.cgi?id=181

-- 
~Randy



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