https://lore.kernel.org/lkml/20111103182830.GB3844@khazad-dum.debian.net/T/ linux-kernel.vger.kernel.org archive mirror [ ][search] help / color / mirror / Atom feed * Simultaneous cat and external keyboard input causing kernel panic @ 2011-11-03 12:14 Timo Jyrinki 2011-11-03 15:04 ` Clemens Ladisch 0 siblings, 1 reply; 3+ messages in thread From: Timo Jyrinki @ 2011-11-03 12:14 UTC (permalink / raw) To: linux-kernel Hi, I encountered a kernel panic with the 3.1.0 kernel on a Dell Latitude E6410 while inputting simultaneously from the integrated keyboard with a cat and from the external keyboard myself. I was trying to type my password with the external keyboard (pw dialog already visible), but I noticed that the computer didn't seem responsive to my typing. Then suddenly the cat shifted his position and there was a kernel panic involving input handling. I'm now using i8042.nokbd kernel parameter as a workaround, something I've found useful also earlier. I wonder if anyone else is experiencing similar problems? This didn't seem to happen with 3.0, which was the first kernel version I used on this E6410. Although it has to be noted that the internal keyboard input was not yet as heavy either at that time. Please test if you can reproduce the problem. Photos of the panic at http://people.debian.org/~timo/kernelpaniccat/. The first one was taken about ten seconds after the panic and shows the original cat positioning. The two other ones show alternative possible positions together with more of the panic text. There is also one photo showing the pre-crash setup, which I happened to take without anticipating a panic. The similar but black input weight was not in use. The kernel was tainted because the Intel "mei" module from staging was loaded. The kernel used was the final 3.1 from the ubuntu mainline ppa archives for amd64. Thank you, Timo Jyrinki ^ permalink raw reply [flat|nested] 3+ messages in thread --------------------------------------------------------------------- * Re: Simultaneous cat and external keyboard input causing kernel panic 2011-11-03 12:14 Simultaneous cat and external keyboard input causing kernel panic Timo Jyrinki @ 2011-11-03 15:04 ` Clemens Ladisch 2011-11-03 18:28 ` Henrique de Moraes Holschuh 0 siblings, 1 reply; 3+ messages in thread From: Clemens Ladisch @ 2011-11-03 15:04 UTC (permalink / raw) To: Timo Jyrinki; +Cc: linux-kernel Timo Jyrinki wrote: > Then suddenly the cat shifted his position and there was a kernel panic Your cat wanted to find out what the magic in "magic SysRq key" means and pressed Alt+SysRq+C. The problem is that he did not consult Documentation/sysrq.txt first; the "C" does _not_ stand for "catnip". Regards, Clemens ^ permalink raw reply [flat|nested] 3+ messages in thread --------------------------------------------------------------------- * Re: Simultaneous cat and external keyboard input causing kernel panic 2011-11-03 15:04 ` Clemens Ladisch @ 2011-11-03 18:28 ` Henrique de Moraes Holschuh 0 siblings, 0 replies; 3+ messages in thread From: Henrique de Moraes Holschuh @ 2011-11-03 18:28 UTC (permalink / raw) To: Clemens Ladisch; +Cc: Timo Jyrinki, linux-kernel On Thu, 03 Nov 2011, Clemens Ladisch wrote: > Timo Jyrinki wrote: > > Then suddenly the cat shifted his position and there was a kernel panic > > Your cat wanted to find out what the magic in "magic SysRq key" means > and pressed Alt+SysRq+C. The problem is that he did not consult > Documentation/sysrq.txt first; the "C" does _not_ stand for "catnip". Yes, it was a catastrophe. Truth is, cats are great panic generators and as fuzzy beings themselves, they're also great fuzzers. Only, normally they restrict themselves to fuzzing clothes, computer fans, their owner's food, spreadsheets, the nose of anyone alergic to catty fuzzy feelings in a 100m radius, word processors, and IRS forms. However, it is the first time I've seen documented proof that a cat sucessfully fuzzed an input device into a panic. Must be a lolcat's revenge to the lack of mouses since touchpads took over. And Linux has no cat-proofing for the keyboard and touchpads[1], which will leave us wide-open to surprise fuzzer attacks from the lolcats! Maybe we should issue a CVE about it? ;-) [1] Windows _has_ third-party cat-proofing for keyboards, by detecting clustered pressing of nearby keys. I don't think it can yet figure out a catpaw press on the touchpad, however. -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh ^ permalink raw reply [flat|nested] 3+ messages in thread --------------------------------------------------------------------- end of thread, other threads:[~2011-11-03 18:28 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2011-11-03 12:14 Simultaneous cat and external keyboard input causing kernel panic Timo Jyrinki 2011-11-03 15:04 ` Clemens Ladisch 2011-11-03 18:28 ` Henrique de Moraes Holschuh --------------------------------------------------------------------- This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for NNTP newsgroup(s).