Messages in this thread |  | | | Date | Thu, 16 Feb 2012 10:22:08 -0600 | | From | Josh Hunt <> | | Subject | Re: [RFC PATCH v2] compat: poll() in 32-bit applications does not handle negative timeout values properly on 64-bit kernels |
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On 02/11/2012 09:47 AM, Eric Dumazet wrote: > Le vendredi 10 février 2012 à 23:54 -0600, Josh Hunt a écrit : >> We have hit an issue where our 32-bit applications using poll() and >> passing in a value of -1 for the timeout value return after ~49 days >> (2^32 msec), instead of waiting indefinitely. I've instrumented the >> kernel and found we are hitting the case where poll() believes we've >> passed in a positive number and thus creates a timespec, etc. I've >> implemented compat_sys_poll() to sign-extend the timeout value and >> resolve the issue. >> >> There was an almost identical patch submitted last year, but for >> whatever reason did not make it in: >> https://lkml.org/lkml/2011/9/18/19 > > Probably because Thomas Meyer didnt answer to patch reviewers, and not > enough people cared. > > By the way, an inline patch is better, as stated in > Documentation/SubmittingPatches > > Anyway, its time to fix this bug... > > Acked-by: Eric Dumazet <eric.dumazet@gmail.com> >
I can resubmit the patch inline if you feel that will get more attention by whoever needs to do the final approval on this.
Josh
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