Hello,
In wake of the recent x32 bug reports, I tried compiling my perf_fuzzer in
x32 mode and running it. It's turning up a lot of issues. One was a
reboot with no debug messages.
This is a core2 system running 3.14-rc1
Here's the BUG message:
[ 150.555653] BUG: unable to handle kernel paging request at 0000000100000000
[ 150.556002] IP: [<0000000100000000>] 0x100000000
[ 150.556002] PGD 0
[ 150.556002] Oops: 0010 [#1] SMP
[ 150.556002] Modules linked in: cpufreq_userspace cpufreq_stats cpufreq_powersave cpufreq_conservative f71882fg mcs7830 usbnet acpi_cpufreq evdev psmouse serio_raw video coretemp pcspkr ohci_pci wmi ohci_hcd processor i2c_nforce2 button thermal_sys sg ehci_pci ehci_hcd sd_mod usbcore usb_common
[ 150.556002] CPU: 0 PID: 9165 Comm: perf_fuzzer Not tainted 3.14.0-rc1 #1
[ 150.556002] Hardware name: AOpen DE7000/nMCP7ALPx-DE R1.06 Oct.19.2012, BIOS 080015 10/19/2012
[ 150.556002] task: ffff8800ca2c87e0 ti: ffff8800c4bc2000 task.ti: ffff8800c4bc2000
[ 150.556002] RIP: 0010:[<0000000100000000>] [<0000000100000000>] 0x100000000
[ 150.556002] RSP: 0000:ffff8800c4bc3cb0 EFLAGS: 00010206
[ 150.556002] RAX: 0000000100000000 RBX: ffff8800c340e440 RCX: 000000000000073d
[ 150.556002] RDX: 0000000000000000 RSI: ffff880037ec2540 RDI: ffff8800c340e440
[ 150.556002] RBP: ffff880037ec2540 R08: ffff88011fbf6f40 R09: 0000000000000000
[ 150.556002] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[ 150.556002] R13: 0077ffffffffffff R14: 0000000000000000 R15: 0000000000000009
[ 150.556002] FS: 0000000000000000(0000) GS:ffff88011fc00000(0000) knlGS:0000000000000000
[ 150.556002] CS: 0010 DS: 002b ES: 002b CR0: 000000008005003b
[ 150.556002] CR2: 0000000100000000 CR3: 0000000001a0c000 CR4: 00000000000407f0
[ 150.556002] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 150.556002] DR3: 00000000022a1000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[ 150.556002] Stack:
[ 150.556002] ffffffff81102dd7 ffff880037ec2540 ffff880037fbc2c0 0000000000000000
[ 150.556002] ffffffff81119c81 ffff8800cb2c0780 ffff8800ca2c87e0 ffff8800ca2c8de4
[ 150.556002] ffff8800cb2c0780 0000000000000000 ffff8800cb2c07e0 0000000000000001
[ 150.556002] Call Trace:
[ 150.556002] [<ffffffff81102dd7>] ? filp_close+0x36/0x65
[ 150.556002] [<ffffffff81119c81>] ? put_files_struct+0x62/0xb2
[ 150.556002] [<ffffffff8103dd08>] ? do_exit+0x3c9/0x959
[ 150.556002] [<ffffffff810e2447>] ? __do_fault+0x355/0x392
[ 150.556002] [<ffffffff8103e30d>] ? do_group_exit+0x75/0x9f
[ 150.556002] [<ffffffff8104aaba>] ? get_signal_to_deliver+0x464/0x481
[ 150.556002] [<ffffffff81002404>] ? do_signal+0x3a/0x5a7
[ 150.556002] [<ffffffff814ea7b2>] ? trace_page_fault+0x22/0x30
[ 150.556002] [<ffffffff81002996>] ? do_notify_resume+0x25/0x5e
[ 150.556002] [<ffffffff814ea675>] ? retint_signal+0x3d/0x78
[ 150.556002] Code: Bad RIP value.
[ 150.556002] RIP [<0000000100000000>] 0x100000000
[ 150.556002] RSP <ffff8800c4bc3cb0>
[ 150.556002] CR2: 0000000100000000
[ 150.556002] ---[ end trace c733264161a3819f ]---
[ 150.556002] Fixing recursive fault but reboot is needed!