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30 lines
1.0 KiB
30 lines
1.0 KiB
9 months ago
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commit e7d22db29cfdd2f1fb97a70a76fa53d151569945
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Author: Mingli Yu <Mingli.Yu@windriver.com>
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Date: Thu Sep 20 12:41:13 2018 +0200
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Linux gethostid: Check for NULL value from gethostbyname_r [BZ #23679]
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A NULL value can happen with certain gethostbyname_r failures.
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(cherry picked from commit 1214ba06e6771acb953a190091b0f6055c64fd25)
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diff --git a/sysdeps/unix/sysv/linux/gethostid.c b/sysdeps/unix/sysv/linux/gethostid.c
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index 2e20f034dc134cc7..ee0190e7f945db1f 100644
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--- a/sysdeps/unix/sysv/linux/gethostid.c
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+++ b/sysdeps/unix/sysv/linux/gethostid.c
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@@ -102,12 +102,12 @@ gethostid (void)
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{
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int ret = __gethostbyname_r (hostname, &hostbuf,
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tmpbuf.data, tmpbuf.length, &hp, &herr);
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- if (ret == 0)
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+ if (ret == 0 && hp != NULL)
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break;
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else
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{
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/* Enlarge the buffer on ERANGE. */
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- if (herr == NETDB_INTERNAL && errno == ERANGE)
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+ if (ret != 0 && herr == NETDB_INTERNAL && errno == ERANGE)
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{
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if (!scratch_buffer_grow (&tmpbuf))
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return 0;
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