kern/56074: Kernel panic in uvm_pglist_alloc_contig_agressive with uvideo

To: kern-bug-people%netbsd.org@localhost,gnats-admin%netbsd.org@localhost,netbsd-bugs%netbsd.org@localhost
Subject: kern/56074: Kernel panic in uvm_pglist_alloc_contig_agressive with uvideo
From: reinoud%NetBSD.org@localhost
Date: Thu, 25 Mar 2021 13:10:01 +0000 (UTC)
>Number:         56074
>Category:       kern
>Synopsis:       Kernel panic in uvm_pglist_alloc_contig_agressive with uvideo
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Mar 25 13:10:01 +0000 2021
>Originator:     Reinoud Zandijk
>Release:        NetBSD 9.99.80
>Organization:
	
>Environment:
	
	
System: NetBSD diablo.13thmonkey.org 9.99.80 NetBSD 9.99.80 (GENERIC) #2: Wed Feb 24 22:15:49 CET 2021 reinoud%diablo.13thmonkey.org@localhost:/usr/sources/cvs.netbsd.org/src-clean/sys/arch/amd64/compile/obj/GENERIC amd64
Architecture: x86_64
Machine: amd64
>Description:
	

When trying out my USB camera in Firefox for a test-meeting the kernel
paniced. It had been running fine for some days. It was attached on:

    ehci0
      usb3
        uhub6
          uhub8
            uvideo0
              video0
            uaudio0
              audio1

addr 1: EHCI root hub, NetBSD
 addr 2: product 005a, NEC
  addr 3: product 0825, Logitech

The gdb trace gives:

(gdb) target kvm netbsd.175.core
0xffffffff802261d5 in cpu_reboot (howto=howto@entry=260,
bootstr=bootstr@entry=0x0) at
/usr/sources/cvs.netbsd.org/src-clean/sys/arch/amd64/amd64/machdep.c:713
713                     dumpsys();
(gdb) where
#0  0xffffffff802261d5 in cpu_reboot (howto=howto@entry=260, bootstr=bootstr@entry=0x0) at
/usr/sources/cvs.netbsd.org/src-clean/sys/arch/amd64/amd64/machdep.c:713

#1  0xffffffff80caefe1 in kern_reboot (howto=howto@entry=260, bootstr=bootstr@entry=0x0) at
/usr/sources/cvs.netbsd.org/src-clean/sys/kern/kern_reboot.c:73

#2  0xffffffff80ceedfd in vpanic (fmt=fmt@entry=0xffffffff81346626 "trap", ap=ap@entry=0xffffa10109d79588) at
/usr/sources/cvs.netbsd.org/src-clean/sys/kern/subr_prf.c:290

#3  0xffffffff80ceeec2 in panic (fmt=fmt@entry=0xffffffff81346626 "trap") at /usr/sources/cvs.netbsd.org/src-clean/sys/kern/subr_prf.c:209

#4  0xffffffff80228ee1 in trap (frame=0xffffa10109d796d0) at /usr/sources/cvs.netbsd.org/src-clean/sys/arch/amd64/amd64/trap.c:326

#5  0xffffffff802210e3 in alltraps ()

#6  0xffffffff80c69a8c in uvm_pglistalloc_contig_aggressive (rlist=0xffffa10109d79930, boundary=0, alignment=4096, high=4294967296, low=16777216, num=60) at
/usr/sources/cvs.netbsd.org/src-clean/sys/uvm/uvm_pglist.c:405

#7  uvm_pglistalloc_contig (waitok=1, rlist=0xffffa10109d79930, boundary=0, alignment=4096, high=4294967296, low=16777216, num=<optimized out>) at
/usr/sources/cvs.netbsd.org/src-clean/sys/uvm/uvm_pglist.c:499

#8  uvm_pglistalloc (size=size@entry=245760, low=low@entry=16777216, high=high@entry=4294967296, alignment=<optimized out>, alignment@entry=4096, boundary=0, rlist=rlist@entry=0xffffa10109d79930, nsegs=nsegs@entry=59, waitok=waitok@entry=1) at
/usr/sources/cvs.netbsd.org/src-clean/sys/uvm/uvm_pglist.c:695

#9  0xffffffff8052d385 in _bus_dmamem_alloc_range (size=245760, alignment=alignment@entry=4096, boundary=0, segs=segs@entry=0xffff8a717c6da500, nsegs=59, rsegs=0xffff8a717c6da4f8, flags=flags@entry=0, low=16777216, high=4294967296, t=0xffff8a717c6da500) at
/usr/sources/cvs.netbsd.org/src-clean/sys/arch/x86/x86/bus_dma.c:225

#10 0xffffffff8052d9e5 in _bus_dmamem_alloc (t=0xffff8a717c6da500, t=0xffff8a717c6da500, flags=0, rsegs=0xffff8a717c6da4f8, nsegs=<optimized out>, segs=0xffff8a717c6da500, boundary=<optimized out>, alignment=4096, size=18446614818756341760) at
/usr/sources/cvs.netbsd.org/src-clean/sys/arch/x86/x86/bus_dma.c:978

#11 _bus_dma_alloc_bouncebuf (t=t@entry=0xffffffff81844d60 <pci_bus_dma_tag>, map=map@entry=0xffff8a7072c30808, size=size@entry=245760, flags=flags@entry=0)
    at /usr/sources/cvs.netbsd.org/src-clean/sys/arch/x86/x86/bus_dma.c:995

#12 0xffffffff8052dfa1 in _bus_dmamap_create (dmamp=0xffff8a6f5d0c7408, flags=0, boundary=0, maxsegsz=245760, nsegments=59, size=245760, t=0xffffffff81844d60 <pci_bus_dma_tag>)
    at /usr/sources/cvs.netbsd.org/src-clean/sys/arch/x86/x86/bus_dma.c:344

#13 bus_dmamap_create (t=t@entry=0xffffffff81844d60 <pci_bus_dma_tag>, size=245760, nsegments=59, maxsegsz=245760, boundary=boundary@entry=0, flags=flags@entry=0, dmamp=dmamp@entry=0xffff8a6f5d0c7408)
    at /usr/sources/cvs.netbsd.org/src-clean/sys/arch/x86/x86/bus_dma.c:1365

#14 0xffffffff8046416a in usb_block_allocmem (tag=tag@entry=0xffffffff81844d60 <pci_bus_dma_tag>, size=size@entry=245760, align=align@entry=0, flags=flags@entry=1, dmap=dmap@entry=0xffff8a7167a8c230)
    at /usr/sources/cvs.netbsd.org/src-clean/sys/dev/usb/usb_mem.c:171

#15 0xffffffff80464363 in usb_allocmem (bus=<optimized out>, size=245760, align=align@entry=0, flags=1, p=0xffff8a7167a8c230) at
/usr/sources/cvs.netbsd.org/src-clean/sys/dev/usb/usb_mem.c:282

#16 0xffffffff8045f153 in usbd_alloc_buffer (size=244800, xfer=0xffff8a7167a8c1b8) at
/usr/sources/cvs.netbsd.org/src-clean/sys/dev/usb/usbdi.c:485

#17 usbd_create_xfer (pipe=0xffff8a7182d54900, len=len@entry=244800, flags=flags@entry=0, nframes=80, xp=xp@entry=0xffff8a711a1b69f8) at
/usr/sources/cvs.netbsd.org/src-clean/sys/dev/usb/usbdi.c:606

#18 0xffffffff804850ce in uvideo_stream_start_xfer (vs=0xffff8a711a1b6940) at /usr/sources/cvs.netbsd.org/src-clean/sys/dev/usb/uvideo.c:1587

#19 uvideo_start_transfer (addr=<optimized out>) at
/usr/sources/cvs.netbsd.org/src-clean/sys/dev/usb/uvideo.c:2137

#20 0xffffffff80d86c5c in video_stream_on (sc=sc@entry=0xffff8a70cf481d00, type=<optimized out>) at
/usr/sources/cvs.netbsd.org/src-clean/sys/dev/video.c:1667

#21 0xffffffff80d87d97 in video_stream_on (type=<optimized out>, sc=0xffff8a70cf481d00) at
/usr/sources/cvs.netbsd.org/src-clean/sys/dev/video.c:1659

#22 videoioctl (dev=<optimized out>, cmd=2147767826, data=0xffffa10109d79ee0, flag=7, l=<optimized out>) at
/usr/sources/cvs.netbsd.org/src-clean/sys/dev/video.c:2121

#23 0xffffffff80cdb6bf in cdev_ioctl (dev=49408, cmd=2147767826, data=0xffffa10109d79ee0, flag=7, l=0xffff8a719ab7ea40) at
/usr/sources/cvs.netbsd.org/src-clean/sys/kern/subr_devsw.c:935

#24 0xffffffff80d64d8f in VOP_IOCTL (vp=vp@entry=0xffff8a6ffa5077c0, command=command@entry=2147767826, data=data@entry=0xffffa10109d79ee0, fflag=<optimized out>, cred=<optimized out>)
    at /usr/sources/cvs.netbsd.org/src-clean/sys/kern/vnode_if.c:646

#25 0xffffffff80d5bcac in vn_ioctl (fp=0xffff8a6ff9ec8680, com=2147767826, data=0xffffa10109d79ee0) at
/usr/sources/cvs.netbsd.org/src-clean/sys/kern/vfs_vnops.c:783

#26 0xffffffff80d00504 in sys_ioctl (l=<optimized out>, uap=0xffffa10109d7a000, retval=<optimized out>) at
/usr/sources/cvs.netbsd.org/src-clean/sys/kern/sys_generic.c:671

#27 0xffffffff8054713a in sy_call (rval=0xffffa10109d79fb0, uap=0xffffa10109d7a000, l=0xffff8a719ab7ea40, sy=0xffffffff81882f90 <sysent+1296>) at
/usr/sources/cvs.netbsd.org/src-clean/sys/sys/syscallvar.h:65

#28 sy_invoke (code=54, rval=0xffffa10109d79fb0, uap=0xffffa10109d7a000, l=0xffff8a719ab7ea40, sy=0xffffffff81882f90 <sysent+1296>) at
/usr/sources/cvs.netbsd.org/src-clean/sys/sys/syscallvar.h:94

#29 syscall (frame=0xffffa10109d7a000) at
/usr/sources/cvs.netbsd.org/src-clean/sys/arch/x86/x86/syscall.c:138

#30 0xffffffff8020b25d in handle_syscall ()
(gdb) 


>How-To-Repeat:
Unknown, plugged in my uvideo device and used it
	
>Fix:
Unknown
	

>Unformatted:
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