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commit 5adda61f62b77384718b4c0d8336ade8f2b4b35c
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Author: Andreas Schwab <schwab@linux-m68k.org>
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Date: Fri Jun 25 15:02:47 2021 +0200
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wordexp: handle overflow in positional parameter number (bug 28011)
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Use strtoul instead of atoi so that overflow can be detected.
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diff --git a/posix/wordexp-test.c b/posix/wordexp-test.c
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index cc29840355e047cc..30c1dd65efcc0b49 100644
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--- a/posix/wordexp-test.c
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+++ b/posix/wordexp-test.c
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@@ -200,6 +200,7 @@ struct test_case_struct
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{ 0, NULL, "$var", 0, 0, { NULL, }, IFS },
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{ 0, NULL, "\"\\n\"", 0, 1, { "\\n", }, IFS },
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{ 0, NULL, "", 0, 0, { NULL, }, IFS },
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+ { 0, NULL, "${1234567890123456789012}", 0, 0, { NULL, }, IFS },
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/* Flags not already covered (testit() has special handling for these) */
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{ 0, NULL, "one two", WRDE_DOOFFS, 2, { "one", "two", }, IFS },
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diff --git a/posix/wordexp.c b/posix/wordexp.c
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index 048a8068544c81fa..4061969c720f1f34 100644
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--- a/posix/wordexp.c
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+++ b/posix/wordexp.c
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@@ -1420,7 +1420,7 @@ envsubst:
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/* Is it a numeric parameter? */
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else if (isdigit (env[0]))
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{
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- int n = atoi (env);
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+ unsigned long n = strtoul (env, NULL, 10);
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if (n >= __libc_argc)
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/* Substitute NULL. */
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