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Date:      23 Jun 1998 22:24:59 -0000
From:      "Brian Feldman" <brianfeldman@hotmail.com>
To:        freebsd-current@FreeBSD.ORG
Subject:   kernfs crash
Message-ID:  <19980623222459.21294.qmail@m2.findmail.com>

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It seems that some Linux system calls to the underlying fs might be crashing the kernel fs. Okay, well might being "definitely": the program I tried was Progressive Networks' newest RealPlayer release 5.0 for Linux, and it did seem to cause a crash in kernfs_mod.o. I don't have enough info to try to fix it, seeing as being an lkm (and not know how to load modules in kgdb ;) I couldn't trace it fully, but here's the most I have now (I'd try it statically compiled and really debug it like that, but I don't feel like crashing my box intentionally anytime soon):
#0  boot (howto=256) at ../../kern/kern_shutdown.c:282
#1  0xf0119367 in panic (fmt=0xf5740bc8 "kernfs_readdir: not hungry")
    at ../../kern/kern_shutdown.c:423
#2  0xf5740c20 in ?? ()
#3  0xf578cae3 in ?? ()
#4  0xf01e3ed3 in syscall (frame={tf_es = 39, tf_ds = 39, tf_edi = 135848848,
      tf_esi = 4, tf_ebp = -272642792, tf_isp = -175386652, tf_ebx = 4,
      tf_edx = 512, tf_ecx = 135875824, tf_eax = 141, tf_trapno = 7,
      tf_err = 2, tf_eip = 674032430, tf_cs = 31, tf_eflags = 582,
      tf_esp = -272643860, tf_ss = 39}) at ../../i386/i386/trap.c:1031
#5  0xf01d68bc in Xint0x80_syscall ()

Anyway, just test it out, it should be reproducible.

Cheers,
Brian Feldman

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