Date: Mon, 29 Apr 2002 08:56:51 -0400 (EDT) From: John Baldwin <jhb@FreeBSD.org> To: Robert Watson <rwatson@FreeBSD.org> Cc: current@FreeBSD.org Subject: RE: page fault in _mtx_lock_flags Message-ID: <XFMail.20020429085651.jhb@FreeBSD.org> In-Reply-To: <Pine.NEB.3.96L.1020428094421.64976J-100000@fledge.watson.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On 28-Apr-2002 Robert Watson wrote: > > As usual, GENERIC -CURRENT head from last night, from the main tree. > Dual-proc SMP box netbooted using PXE. System usually boots, does a > buildkernel -j 8 over NFS, then reboots and repeats. This time it didn't. > > I actually have two boxes doing this, which does seem to double the rate > of panics I get. > > APIC_IO: Testing 8254 interrupt delivery > APIC_IO: Broken MP table detected: 8254 is not connected to IOAPIC #0 intpin > 2 > APIC_IO: routing 8254 via 8259 and IOAPIC #0 intpin 0 > ad0: 19458MB <ST320420A> [39535/16/63] at ata0-master UDMA33 > acd0: CDROM <MATSHITA CR-176> at ata1-master PIO4 > doSuMnPt:i nAgP rCoPoUt #f1r oLma unnfcsh:etsray irq 10 > NFS ROOT: 192.168.50.1:/cboss/devel/nfsroot/crash1.cboss.tislabs.com > > > Fatal trap 12: page fault while in kernel mode > cpuid = 0; lapic.id = 00000000 > fault virtual address = 0x7974748b These are ASCII chars, somehow a pointer to a mutex has been overwritten with a string. "yyt<some unprintable char>" > fault code = supervisor write, page not present > instruction pointer = 0x8:0xc02449b6 > stack pointer = 0x10:0xc93dea14 > frame pointer = 0x10:0xc93dea20 > code segment = base 0x0, limit 0xfffff, type 0x1b > = DPL 0, pres 1, def32 1, gran 1 > processor eflags = interrupt enabled, resume, IOPL = 0 > current process = 41 (sh) > kernel: type 12 trap, code=0 > Stopped at _mtx_lock_flags+0x42: lock cmpxchgl %ecx,0x18(%ebx) > db> trace > _mtx_lock_flags(79747473,0,c03cb862,e3) at _mtx_lock_flags+0x42 Same here. See the first arg which is supposed to be a mutex pointer. "ytts" -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?XFMail.20020429085651.jhb>