kern/48463: umass allocates memory from interrupt

[mlelstv%serpens.de@localhost]

>Number:         48463
>Category:       kern
>Synopsis:       umass alloctes memory from interrupt
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Dec 20 10:45:00 +0000 2013
>Originator:     Michael van Elst
>Release:        NetBSD 6.99.28
>Organization:
        
>Environment:
        
        
System: NetBSD twitty 6.99.28 NetBSD 6.99.28 (TWITTY) #3: Fri Dec 20 00:34:36 
CET 2013 
mlelstv@pussyfoot:/home/netbsd-current/obj.evbarm/home/netbsd-current/src/sys/arch/evbarm/compile/TWITTY
 evbarm
Architecture: earmhf
Machine: evbarm
>Description:

panic: kernel diagnostic assertion "(!cpu_intr_p() && !cpu_softintr_p())" 
failed: file "/home/netbsd-current/src/sys/kern/subr_kmem.c", line 366 kmem(9) 
sho
uld not be used from the interrupt context
cpu0: Begin traceback...
0xc9b0ad14: netbsd:db_panic+0xc
0xc9b0ad44: netbsd:vpanic+0x138
0xc9b0ad5c: netbsd:kern_assert+0x40
0xc9b0ad8c: netbsd:kmem_zalloc+0x40
0xc9b0adc4: netbsd:usb_block_allocmem+0x138
0xc9b0adfc: netbsd:usb_allocmem_flags+0x188
0xc9b0ae14: netbsd:usb_allocmem+0x1c
0xc9b0ae34: netbsd:dwc2_allocm+0x3c
0xc9b0ae6c: netbsd:usbd_transfer+0x8c
0xc9b0aea4: netbsd:umass_setup_transfer+0x74
0xc9b0aedc: netbsd:umass_bbb_state+0x2a8
0xc9b0af1c: netbsd:usb_transfer_complete+0x31c
0xc9b0af44: netbsd:dwc2_softintr+0x84
0xc9b0af5c: netbsd:usb_soft_intr+0x28
0xc9b0afac: netbsd:softint_dispatch+0xfc
0xcacc1b64: netbsd:softint_switch+0x50
cpu0: End traceback...

>How-To-Repeat:
The crash appears to occur randomly.

>Fix:
        

>Unformatted: