On November 13, 2014 5:03:56 PM PST, Ben Hutchings <b...@decadent.org.uk> wrote: >> On 11/13/2014 01:45 PM, Ben Hutchings wrote: >> > On Thu, 2014-11-13 at 12:53 -0800, Nikolaus Rath wrote: >> >> Package: src:linux >> >> Version: 3.16.7-2 >> >> Severity: normal >> >> File: /boot/vmlinuz-3.16.0-4-amd64 >> >> >> >> Hello, >> >> >> >> When adding >> >> >> >> console=ttyS0,115200n8 console=tty0 no_console_suspend >> >> >> >> to the kernel command line, I'm getting the following kernel Oops >during >> >> boot (full quote in kernel.log below): >> >> >> >> [...] >> >> [ 13.687971] 0000:07:01.0: ttyS0 at I/O 0xc050 (irq = 19, >base_baud = 115200) is a 16550A >> >> [ 13.687980] kernel tried to execute NX-protected page - exploit >attempt? (uid: 0) >> >> [ 13.688130] BUG: unable to handle kernel paging request at >ffffffff819419bf >> >> [ 13.688299] IP: [<ffffffff819419bf>] >serial8250_console_setup+0x0/0xaa >> >> [ 13.688604] PGD 1816067 PUD 1817063 PMD 215f93063 PTE >8000000001941163 >> >> [ 13.688911] Oops: 0011 [#1] SMP >> >> [...] >> >> >> >> Please let me know if I can do something to debug this further. >> > [...] >> > >> > The log didn't include the full oops message; please can you send >that >> > as I don't understand why anything would call this function at this >> > point. (It is only meant to be called during kernel >initialisation, >> > before starting the init program. At this point the code has been >> > freed, hence the page fault.) >> >> Full log is attached. Sorry, I did not realize that the automatically >> included log was truncated. > >This bug seems to be specific to parport_serial. Only built-in drivers >can be console drivers, but parport_serial is built as a module. >However, because it works on top of with 8250_pci, which *is* built-in, >the kernel tries to use it as a console driver anyway, and this leads >to >the crash. We should fix the crash, but you still won't be able to use >ports on the combined parallel/serial card for a console.
Duh. Not at all, or will it work if I build my own kernel with parport_serial built-in? Do I understand correctly that a pci card with only serial ports would work without changes? Best, Nikolaus -- Sent from my Android device with K-9 Mail. Please excuse my brevity. -- To UNSUBSCRIBE, email to debian-kernel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/49dc2e20-f7ad-4a67-8855-a2dd50a64...@rath.org
