30 lines
1.1 KiB
Diff
30 lines
1.1 KiB
Diff
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commit ef21bd2d8c6805c0c186a01f7c5039189f51b8c4
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Author: DJ Delorie <dj@redhat.com>
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Date: Fri Oct 18 17:15:52 2019 -0400
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loadarchive: guard against locale-archive corruption (Bug #25115)
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_nl_load_locale_from_archive() checks for a zero size, but
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divides by both (size) and (size-2). Extend the check to
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guard against a size of two or less.
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Tested by manually corrupting locale-archive and running a program
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that calls setlocale() with LOCPATH unset (size is typically very
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large).
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Reviewed-by: Carlos O'Donell <carlos@redhat.com>
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diff --git a/locale/loadarchive.c b/locale/loadarchive.c
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index 516d30d8d16bd578..b308fd886f44e1fd 100644
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--- a/locale/loadarchive.c
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+++ b/locale/loadarchive.c
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@@ -274,7 +274,7 @@ _nl_load_locale_from_archive (int category, const char **namep)
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+ head->namehash_offset);
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/* Avoid division by 0 if the file is corrupted. */
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- if (__glibc_unlikely (head->namehash_size == 0))
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+ if (__glibc_unlikely (head->namehash_size <= 2))
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goto close_and_out;
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idx = hval % head->namehash_size;
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