[Qemu-devel] [Bug 1653384] Re: Assertion failed with USB pass through with XHCI controller

[Fabian Lesniak]

I examined xhci_kick_epctx (frame 6) and looked into xfer and
xfer->packet, maybe this helps:

(gdb) bt
#0  0x00007fffdccb304f in raise () at /usr/lib/libc.so.6
#1  0x00007fffdccb447a in abort () at /usr/lib/libc.so.6
#2  0x00007fffdccabea7 in __assert_fail_base () at /usr/lib/libc.so.6
#3  0x00007fffdccabf52 in  () at /usr/lib/libc.so.6
#4  0x0000555555a8ab6e in usb_packet_cleanup (p=0x7fff5c3bcd88) at 
hw/usb/core.c:619
#5  0x0000555555aa8d97 in xhci_ep_free_xfer (xfer=0x7fff5c3bcd80) at 
hw/usb/hcd-xhci.c:1465
#6  0x0000555555aaa9a8 in xhci_kick_epctx (epctx=0x7fff5c745290, streamid=0) at 
hw/usb/hcd-xhci.c:2201
#7  0x0000555555aa88d9 in xhci_ep_kick_timer (opaque=0x7fff5c745290) at 
hw/usb/hcd-xhci.c:1363
#8  0x0000555555b6217f in timerlist_run_timers (timer_list=0x5555567a25a0) at 
qemu-timer.c:540
#9  0x0000555555b621cb in qemu_clock_run_timers (type=QEMU_CLOCK_VIRTUAL) at 
qemu-timer.c:551
#10 0x0000555555b62564 in qemu_clock_run_all_timers () at qemu-timer.c:665
#11 0x0000555555b610be in main_loop_wait (nonblocking=0) at main-loop.c:516
#12 0x00005555558f0b97 in main_loop () at vl.c:1966
#13 0x00005555558f847c in main (argc=11, argv=0x7fffffffde18, 
envp=0x7fffffffde78) at vl.c:4685
(gdb) f 6
#6  0x0000555555aaa9a8 in xhci_kick_epctx (epctx=0x7fff5c745290, streamid=0) at 
hw/usb/hcd-xhci.c:2201
2201            xhci_ep_free_xfer(epctx->retry);
(gdb) info local
xfer = 0x7fff5c3bcd80
xhci = 0x7fff76538010
stctx = 0x7fffffffd960
xfer = 0x2ffffd920
ring = 0x5555562aeed0 <timers_state+16>
ep = 0x0
mfindex = 126425
length = 1434054766
i = 32767
__PRETTY_FUNCTION__ = "xhci_kick_epctx"
(gdb) print xfer
$1 = (XHCITransfer *) 0x7fff5c3bcd80
(gdb) print *xfer
$2 = {epctx = 0x7fff5c745290, packet = {pid = 105, id = 1028964352, ep = 
0x555558342660, stream = 0, iov = {iov = 0x7fff5c138960, niov = 1, nalloc = 1, 
size = 5}, parameter = 0, short_not_ok = false, int_req = true, status = -6, 
actual_length = 0, state = USB_PACKET_ASYNC, combined = 0x0, queue = {tqe_next 
= 0x0, tqe_prev = 0x555558342678}, combined_entry = {tqe_next = 0x0, tqe_prev = 
0x0}}, sgl = {sg = 0x5555586401e0, nsg = 1, nalloc = 1, size = 5, dev = 
0x7fff76538010, as = 0x7fff76538220}, running_async = true, running_retry = 
false, complete = false, int_req = true, iso_pkts = 0, streamid = 0, in_xfer = 
true, iso_xfer = false, timed_xfer = false, trb_count = 1, trbs = 
0x7fff5c025690, status = CC_INVALID, pkts = 0, pktsize = 0, cur_pkt = 0, 
mfindex_kick = 126424, next = {tqe_next = 0x0, tqe_prev = 0x0}}
(gdb) print xfer->packet
$3 = {pid = 105, id = 1028964352, ep = 0x555558342660, stream = 0, iov = {iov = 
0x7fff5c138960, niov = 1, nalloc = 1, size = 5}, parameter = 0, short_not_ok = 
false, int_req = true, status = -6, actual_length = 0, state = 
USB_PACKET_ASYNC, combined = 0x0, queue = {tqe_next = 0x0, tqe_prev = 
0x555558342678}, combined_entry = {tqe_next = 0x0, tqe_prev = 0x0}}

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1653384

Title:
  Assertion failed with USB pass through with XHCI controller

Status in QEMU:
  New

Bug description:
  Starting qemu 2.8.0 with XHCI controller and host device passed
  through results in an assertion failure:

  qemu-system-x86_64: hw/usb/core.c:623: usb_packet_cleanup: Assertion
  `!usb_packet_is_inflight(p)' failed.

  Can be reproduced with the following command (passing through a Lenovo
  keyboard):

  qemu-system-x86_64 -usb  -device nec-usb-xhci,id=usb -device usb-
  host,vendorid=0x04b3,productid=0x3025,id=hostdev0,bus=usb.0,port=1

  If nec-usb-xhci is changed to usb-ehci, qemu tries to boot without
  assertion failures.

  
  Can be reproduced with the latest master (commit dbe2b65) and v2.8.0.

  Bisected the issue to following commit:
  first bad commit: [94b037f2a451b3dc855f9f2c346e5049a361bd55] xhci: use linked 
list for transfers

  
  Backtrace from commit dbe2b65:

  #0  0x00007f2eb4657227 in __GI_raise (address@hidden) at 
../sysdeps/unix/sysv/linux/raise.c:55
          resultvar = 0
          pid = 3453
          selftid = 3453
  #1  0x00007f2eb465867a in __GI_abort () at abort.c:89
          save_stage = 2
          act = {__sigaction_handler = {sa_handler = 0x4, sa_sigaction = 0x4}, 
sa_mask = {__val = {140734740550528, 93876690035339, 
                140734740550624, 48833659808, 0, 0, 0, 21474836480, 
140734740550792, 139838573009553, 140734740550560, 139838573043008, 
                139838573024160, 93876666665872, 139838702616576, 
139838573024160}}, sa_flags = 1528954938, 
            sa_restorer = 0x55615b2202c0 <__PRETTY_FUNCTION__.38612>}
          sigs = {__val = {32, 0 <repeats 15 times>}}
  #2  0x00007f2eb46502cd in __assert_fail_base (fmt=0x7f2eb47893a0 "%s%s%s:%u: 
%s%sAssertion `%s' failed.\n%n", 
      address@hidden "!usb_packet_is_inflight(p)", address@hidden 
"hw/usb/core.c", address@hidden, 
      address@hidden <__PRETTY_FUNCTION__.38612> "usb_packet_cleanup") at 
assert.c:92
          str = 0x55615cfdf510 ""
          total = 4096
  #3  0x00007f2eb4650382 in __GI___assert_fail (assertion=0x55615b22003a 
"!usb_packet_is_inflight(p)", file=0x55615b21fdf0 "hw/usb/core.c", 
      line=619, function=0x55615b2202c0 <__PRETTY_FUNCTION__.38612> 
"usb_packet_cleanup") at assert.c:101
  No locals.
  #4  0x000055615afc385e in usb_packet_cleanup ()
  No symbol table info available.
  #5  0x000055615afda555 in xhci_ep_free_xfer ()
  No symbol table info available.
  #6  0x000055615afdc156 in xhci_kick_epctx ()
  No symbol table info available.
  #7  0x000055615afda099 in xhci_ep_kick_timer ()
  No symbol table info available.
  #8  0x000055615b08ceee in timerlist_run_timers ()
  No symbol table info available.
  #9  0x000055615b08cf36 in qemu_clock_run_timers ()
  No symbol table info available.
  #10 0x000055615b08d2df in qemu_clock_run_all_timers ()
  No symbol table info available.
  #11 0x000055615b08be40 in main_loop_wait ()
  No symbol table info available.
  #12 0x000055615ae3870f in main_loop ()
  No symbol table info available.
  #13 0x000055615ae4027b in main ()

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1653384/+subscriptions