[DragonFlyBSD - Bug #2623] Instant panic trying to view html5 videos with Firefox

bugtracker-admin at leaf.dragonflybsd.org bugtracker-admin at leaf.dragonflybsd.org
Tue Jun 10 02:23:51 PDT 2014

Issue #2623 has been updated by tuxillo.

Category set to Kernel
Target version set to 3.9.x

Hi François,

What happened to this one? Did you check the patch with Matt?

Antonio Huete

Bug #2623: Instant panic trying to view html5 videos with Firefox

* Author: ftigeot
* Status: New
* Priority: Normal
* Assignee: 
* Category: Kernel
* Target version: 3.9.x
The kernel panics almost immediately after a video has started playing.

Steps to reproduce:
- Use DragonFly 3.7/x86_64 (i386 untested)
- Launch firefox
- Try to see a video on youtube

Panic message and stack trace:

<6>pid 1606 (firefox), uid 1000: exited on signal 6
panic: assertion "ref >= &td->td_toks_base && ref->tr_tok == tok" failed in lwkt_reltoken at /usr/src/sys/kern/lwkt_token.c:812

(kgdb) #0  _get_mycpu () at ./machine/thread.h:69
#1  md_dumpsys (di=di at entry=0xffffffff80f2df60 <dumper>)
    at /usr/src/sys/platform/pc64/x86_64/dump_machdep.c:265
#2  0xffffffff80564952 in dumpsys () at /usr/src/sys/kern/kern_shutdown.c:912
#3  0xffffffff80564e1f in boot (howto=howto at entry=260)
    at /usr/src/sys/kern/kern_shutdown.c:369
#4  0xffffffff80565115 in panic (
    fmt=fmt at entry=0xffffffff8097ba38 "assertion \"%s\" failed in %s at %s:%u")
    at /usr/src/sys/kern/kern_shutdown.c:818
#5  0xffffffff80579478 in lwkt_reltoken (tok=tok at entry=0xffffffe209df2040)
    at /usr/src/sys/kern/lwkt_token.c:812
#6  0xffffffff80567f58 in sigexit (lp=lp at entry=0xffffffe20a21f200, 
    sig=sig at entry=6) at /usr/src/sys/kern/kern_sig.c:2185
#7  0xffffffff80568126 in postsig (sig=sig at entry=6)
    at /usr/src/sys/kern/kern_sig.c:2083
#8  0xffffffff80930f1d in userret (lp=lp at entry=0xffffffe20a21f200, 
    frame=frame at entry=0xffffffe20f42f9f8, sticks=sticks at entry=7812)
    at /usr/src/sys/platform/pc64/x86_64/trap.c:275
#9  0xffffffff809325e3 in syscall2 (frame=0xffffffe20f42f9f8)
    at /usr/src/sys/platform/pc64/x86_64/trap.c:1310
#10 0xffffffff8091bfeb in Xfast_syscall ()
    at /usr/src/sys/platform/pc64/x86_64/exception.S:323
#11 0x000000000000002b in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

patch-kern_sig.c (555 Bytes)

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