>Number:         32823
>Category:       kern
>Synopsis:       panic in mixer ioctl
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Feb 13 19:55:00 +0000 2006
>Originator:     Rui Paulo
>Release:        NetBSD 3.99.15
>Organization:
>Environment:
System: NetBSD quark.mobile.fnop.net 3.99.15 NetBSD 3.99.15 (QUARK) #58: Mon Feb 13 00:39:12 WET 2006 rpaulo@quark.mobile.fnop.net:/usr/obj/sys/arch/i386/compile/QUARK i386
Architecture: i386
Machine: i386
>Description:

changing the volume of a usb sound card trigered a fault
uvm_fault(0xc04e22c0, 0xdeadb000, 0, 1) -> 0xe

backtrace:
#7  0xc035b184 in trap (frame=0xcb8ffbb4)
    at /home/rpaulo/netbsd/src/sys/arch/i386/i386/trap.c:310
#8  0xc0102e1d in calltrap ()
#9  0xc02d6f2b in kpsignal2 (p=0xcba289dc, ksi=0xcb8ffc74, dolock=1)
    at /home/rpaulo/netbsd/src/sys/kern/kern_sig.c:1102
#10 0xc02d67dc in psignal1 (p=0xcba289dc, signum=23, dolock=1)
    at /home/rpaulo/netbsd/src/sys/kern/kern_sig.c:998
#11 0xc02a0ef7 in mixer_signal (sc=0xc101e800)
    at /home/rpaulo/netbsd/src/sys/dev/audio.c:3558
#12 0xc02a1058 in mixer_ioctl (sc=0xc101e800, cmd=3222555905, 
    addr=0xcb8ffea4 "\005", flag=5, l=0xcb5d73a0)
    at /home/rpaulo/netbsd/src/sys/dev/audio.c:3621
#13 0xc029d0b0 in audioioctl (dev=10768, cmd=3222555905, 
    addr=0xcb8ffea4 "\005", flag=5, l=0xcb5d73a0)
    at /home/rpaulo/netbsd/src/sys/dev/audio.c:1033
#14 0xc0325105 in spec_ioctl (v=0xcb8ffd74)
    at /home/rpaulo/netbsd/src/sys/miscfs/specfs/spec_vnops.c:484
#15 0xc031f513 in VOP_IOCTL (vp=0xcb41fdd4, command=3222555905, 
    data=0xcb8ffea4, fflag=5, cred=0xcb6a0b80, l=0xcb5d73a0)
    at /home/rpaulo/netbsd/src/sys/kern/vnode_if.c:504
#16 0xc031d07b in vn_ioctl (fp=0xcb6a2044, com=3222555905, data=0xcb8ffea4, 
    l=0xcb5d73a0) at /home/rpaulo/netbsd/src/sys/kern/vfs_vnops.c:659
#17 0xc02f0c25 in sys_ioctl (l=0xcb5d73a0, v=0xcb8fff64, retval=0xcb8fff5c)
    at /home/rpaulo/netbsd/src/sys/kern/sys_generic.c:621
#18 0xc035abaf in syscall_plain (frame=0xcb8fffa8)
    at /home/rpaulo/netbsd/src/sys/arch/i386/i386/syscall.c:160


#8  0xc0102e1d in calltrap ()
(gdb) 
#9  0xc02d6f2b in kpsignal2 (p=0xcba289dc, ksi=0xcb8ffc74, dolock=1)
    at /home/rpaulo/netbsd/src/sys/kern/kern_sig.c:1102
1102                            if (prop & SA_TTYSTOP && p->p_pgrp->pg_jobc == 0)
(gdb) 
#10 0xc02d67dc in psignal1 (p=0xcba289dc, signum=23, dolock=1)
    at /home/rpaulo/netbsd/src/sys/kern/kern_sig.c:998
998             kpsignal2(p, &ksi, dolock);
(gdb) 
#11 0xc02a0ef7 in mixer_signal (sc=0xc101e800)
    at /home/rpaulo/netbsd/src/sys/dev/audio.c:3558
3558                    psignal(m->proc, SIGIO);
(gdb) 
#12 0xc02a1058 in mixer_ioctl (sc=0xc101e800, cmd=3222555905, 
    addr=0xcb8ffea4 "\005", flag=5, l=0xcb5d73a0)
    at /home/rpaulo/netbsd/src/sys/dev/audio.c:3621
3621                            mixer_signal(sc);
(gdb) 
#13 0xc029d0b0 in audioioctl (dev=10768, cmd=3222555905, 
    addr=0xcb8ffea4 "\005", flag=5, l=0xcb5d73a0)
    at /home/rpaulo/netbsd/src/sys/dev/audio.c:1033
1033                    error = mixer_ioctl(sc, cmd, addr, flag, l);


>How-To-Repeat:
	
>Fix: