Messages in this thread | | | Date | Sat, 07 Apr 2007 13:54:30 +0200 | From | Eric Dumazet <> | Subject | Re: [PATCH, take4] FUTEX : new PRIVATE futexes |
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Jakub Jelinek a écrit : > On Sat, Apr 07, 2007 at 10:43:39AM +0200, Eric Dumazet wrote: >> get_futex_key() does a check against sizeof(u32) regardless of futex being 64bits or not. >> So it is possible a 64bit futex spans two pages of memory... > > That would be a user bug. 32-bit futexes have to be 32-bit aligned, 64-bit > futexes have to be 64-bit aligned.
I am not sure what you want to say.
User doing sys_futex64(0x......FFC, FUTEX_WAKE_OP, ...) and crashing kernel or corrupting data is ok because its a user bug ?
User is allowed to do anything, kernel must check and protect innocents. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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