This is on a Thinkpad running 3.1:

panic: audio_init_ringbuffer: blksize
Begin traceback...
audio_init_ringbuffer(c16ef000,c16ef2b0,2,1,cc00fe80) at
netbsd:audio_init_ringbuffer+0xc1
audio_initbufs(c16ef000,cc00fe88,1,c16ef258,cc00f974) at
netbsd:audio_initbufs+0x1b
audiosetinfo(c16ef000,cc00fde4,cc00fc0c,c02fb0e9,c16ef000) at
netbsd:audiosetinfo+0x628
audio_ioctl(c16ef000,c0884116,cc00fde4,3,cd71f660) at
netbsd:audio_ioctl+0x360 audioioctl(2a00,c0884116,cc00fde4,3,cd71f660)
at netbsd:audioioctl+0xa1
spec_ioctl(cc00fc84,d4b057e4,40884115,cc00fde4,c052d0c0) at
netbsd:spec_ioctl+0x6e VOP_IOCTL(d4b057e4,c0884116,cc00fde4,3,cb060f6c)
at netbsd:VOP_IOCTL+0x40
vn_ioctl(d46309a4,c0884116,cc00fde4,cd71f660,d4b07e28) at
netbsd:vn_ioctl+0x9a
oss_ioctl_audio(cd71f660,cc00ff64,cc00ff5c,50,cadf981c) at
netbsd:oss_ioctl_audio+0x8e6
linux_sys_ioctl(cc531c64,cc00ff64,cc00ff5c,d6,6) at
netbsd:linux_sys_ioctl+0x88
linux_syscall_plain(cc00ffa8,ad9002b,2b,2b,bfbf002b) at
netbsd:linux_syscall_plain+0x87 End traceback...



		--Steve Bellovin, http://www.cs.columbia.edu/~smb