On Sat, Feb 14, 2004 at 10:44:13PM +0100, Simon L. Nielsen wrote: > acd0: Medium: CD-R 120mm data disc > Memory modified after free 0xc4667200(508) val=1000100 _at_ 0xc4667200 > > > Fatal trap 12: page fault while in kernel mode > fault virtual address = 0x1000120 > fault code = supervisor read, page not present > instruction pointer = 0x8:0xc06627c2 > stack pointer = 0x10:0xc0c21ba4 > frame pointer = 0x10:0xc0c21bc0 > 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 = 0 (swapper) > kernel: type 12 trap, code=0 > Stopped at mtrash_ctor+0x3a: movl 0x20(%eax),%eax > db> trace > mtrash_ctor(c4667200,200,0) at mtrash_ctor+0x3a I reported a similar crash several days ago. http://lists.freebsd.org/pipermail/freebsd-current/2004-February/020580.html My backtrace is different, I get the same "Memory modified after free" message and a mtrash_ctor panic. I've tracked the problem down to (see thread): Via trial and error, I have determined that the above panic is caused by ACPI and ATAng. This is a Dell 4150 laptop. I can build a working kernel with sources checked out via cvsup with date=2004.01.30.19.00.00. If I use a date of 2004.01.30.20.00.00, I retrieve only revision 1.203 of ata-all.c and revision 1.19 of ata-queue.c. No other files are changed in sys/ and the resulting kernel produces the above panic. Finally, if I set hint.acpi.0.disabled="1" in /boot/loader.conf. The kernel that previously panicked will boot fine. -- SteveReceived on Sat Feb 14 2004 - 13:30:59 UTC
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