Messages in this thread | | | Date | Fri, 2 Dec 2016 11:05:58 +0100 | From | Petr Mladek <> | Subject | Re: [lkp] [printk.c] ea0639c4d5: BUG:recent_printk_recursion |
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On Fri 2016-12-02 01:12:32, kernel test robot wrote: > > FYI, we noticed the following commit: > > commit: ea0639c4d5c700ad63c0ace6a7a17877aac5b4c2 ("printk.c: removed unnecessary code") > url: https://github.com/0day-ci/linux/commits/Sebastian-Duda/printk-c-removed-unnecessary-code/20161130-225006 > > > in testcase: trinity > with following parameters: > > runtime: 300s > > test-description: Trinity is a linux system call fuzz tester. > test-url: http://codemonkey.org.uk/projects/trinity/ > > > on test machine: qemu-system-i386 -enable-kvm -m 256M > > caused below changes: > > > +-------------------------------------------------------+------------+------------+ > | | ded6e842cf | ea0639c4d5 | > +-------------------------------------------------------+------------+------------+ > | boot_successes | 19 | 8 | > | boot_failures | 3 | 49 |
I am not surprised. The patch breaks counting of the space needed to print the message. It is likely to cause buffer overflows. I have already nacked it, see https://lkml.kernel.org/r/20161130102231.GE24060@pathway.suse.cz
Anyway, thanks for testing.
Best Regards, Petr
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