Created attachment 330691 [details] serial console log of the panic Description of problem: Since upgrading from Fedora 8 to Fedora 10, my machine has been relatively unstable, with frequent kernel crashes and lockups. I have captured the latest one on a serial console in the hopes that maybe the problems can be identified and resolved. Some earlier crashes that I can find logs for appear to be roughly the same. Version-Release number of selected component (if applicable): kernel-2.6.27.12-170.2.5.fc10.x86_64 (for this crash; I have had crashes in kernel-2.6.27.9-159.fc10.x86_64 as well.) Hardware: Asus M2N4-SLI motherboard, Athlon X2 4600+, 6 GB of memory, ATI Radeon X300 PCIE video card. I believe that I've had crashes both with and without 'nomodeset' as a kernel command line parameter, but this crash occurred with 'nomodeset'. (I use 'nomodeset' because if I do not, X eventually slows down and becomes achingly slow until the system is rebooted; quitting and restarting the X server makes no difference.) Call trace taken from the panic log in the attachment: RIP: 0010:[<ffffffff81020a11>] [<ffffffff81020a11>] smp_apic_timer_interrupt+0xa6/0xa8 [...] Call Trace: <IRQ> [<ffffffff810113d8>] ? apic_timer_interrupt+0x88/0x90 <EOI> [<ffffffff8102571e>] ? native_safe_halt+0x6/0x8 [<ffffffff810172cb>] ? need_resched+0x1e/0x28 [<ffffffff810173b0>] ? default_idle+0x2a/0x4c [<ffffffff81017500>] ? c1e_idle+0x120/0x127 [<ffffffff81336202>] ? atomic_notifier_call_chain+0x13/0x15 [<ffffffff8100f279>] ? cpu_idle+0xb2/0x10b [<ffffffff8132db8c>] ? start_secondary+0x16e/0x173 (I am inlining this bit for easier searching in Bugzilla.)
Your system almost certainly has a hardware problem, probably bad memory but it could also be overheating or have a defective CPU. It is trying to restore the stack pointer to an illegal address: feff88019f0dffa8 This is exactly one bit different from a valid address, indicating that a bit was flipped.
Closing as NOTABUG since it is a hardware problem, not a bug in Fedora.