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29 lines
907 B
29 lines
907 B
3 years ago
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commit d084965adc7baa8ea804427cccf973cea556d697
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Author: Siddhesh Poyarekar <siddhesh@sourceware.org>
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Date: Mon Jan 24 21:36:41 2022 +0530
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realpath: Avoid overwriting preexisting error (CVE-2021-3998)
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Set errno and failure for paths that are too long only if no other error
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occurred earlier.
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Related: BZ #28770
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Reviewed-by: Andreas Schwab <schwab@linux-m68k.org>
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Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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(cherry picked from commit 84d2d0fe20bdf94feed82b21b4d7d136db471f03)
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diff --git a/stdlib/canonicalize.c b/stdlib/canonicalize.c
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index 7a23a51b3a395eb3..e2d4244fc7b8fa25 100644
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--- a/stdlib/canonicalize.c
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+++ b/stdlib/canonicalize.c
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@@ -404,7 +404,7 @@ error:
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{
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if (dest - rname <= get_path_max ())
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rname = strcpy (resolved, rname);
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- else
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+ else if (!failed)
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{
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failed = true;
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__set_errno (ENAMETOOLONG);
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