Fix MaybeReenterWithoutASLR() in docker#1985
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LebedevRI
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May 16, 2025
| // otherwise we will try to reenter infinitely. | ||
| // This seems impossible, but can happen in some docker configurations. | ||
| const auto new_personality = personality(0xffffffff); | ||
| if (internal::get_as_unsigned(new_personality) != proposed_personality) |
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Hm, i would think we should just check that ADDR_NO_RANDOMIZE flag is now set.
Mainly, i don't think it is guaranteed that setting one flag wouldn't set/unset something else.
LebedevRI
reviewed
May 16, 2025
| // Have we failed to change the personality? That may happen. | ||
| if (prev_personality == -1) return; | ||
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| // Make sure the parsona has been updated with the no-ADLR flag, |
In some docker configurations the `personality()` function may return inconsistent results. Double check if the persona has been updated before reentering, otherwise we risk infinite loop. Fixes google#1984.
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nice catch |
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In some docker configurations the
personality()function may return inconsistent results. Double check if the persona has been updated before reentering, otherwise we risk infinite loop.Fixes #1984.