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commit 3d04f5db20c8f0d1ba3881b5f5373586a18cf188
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Author: Siddhesh Poyarekar <siddhesh@redhat.com>
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Date: Tue May 21 21:54:41 2013 +0530
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Set EAI_SYSTEM only when h_errno is NETDB_INTERNAL
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Fixes BZ #15339.
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NSS_STATUS_UNAVAIL may mean that a necessary input resource is not
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available. This could occur in a number of cases including when the
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network is down, system runs out of file descriptors, etc. The
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correct differentiator in such a case is the h_errno, which gives the
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nature of failure. In case of failures other than a simple 'not
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found', we set h_errno as NETDB_INTERNAL and let errno be the
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identifier for the exact error.
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diff --git glibc-2.17-c758a686/nss/getXXbyYY_r.c glibc-2.17-c758a686/nss/getXXbyYY_r.c
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index 44d00f4..33e63d4 100644
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--- glibc-2.17-c758a686/nss/getXXbyYY_r.c
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+++ glibc-2.17-c758a686/nss/getXXbyYY_r.c
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@@ -287,10 +287,10 @@ done:
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#endif
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*result = status == NSS_STATUS_SUCCESS ? resbuf : NULL;
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#ifdef NEED_H_ERRNO
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- if (status == NSS_STATUS_UNAVAIL)
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- /* Either we failed to lookup the functions or the functions themselves
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- had a system error. Set NETDB_INTERNAL here to let the caller know
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- that the errno may have the real reason for failure. */
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+ if (status == NSS_STATUS_UNAVAIL && !any_service && errno != ENOENT)
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+ /* This happens when we weren't able to use a service for reasons other
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+ than the module not being found. In such a case, we'd want to tell the
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+ caller that errno has the real reason for failure. */
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*h_errnop = NETDB_INTERNAL;
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else if (status != NSS_STATUS_SUCCESS && !any_service)
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/* We were not able to use any service. */
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diff --git glibc-2.17-c758a686/sysdeps/posix/getaddrinfo.c glibc-2.17-c758a686/sysdeps/posix/getaddrinfo.c
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index ab135ad..7bb3ded 100644
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--- glibc-2.17-c758a686/sysdeps/posix/getaddrinfo.c
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+++ glibc-2.17-c758a686/sysdeps/posix/getaddrinfo.c
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@@ -1036,7 +1036,15 @@ gaih_inet (const char *name, const struct gaih_service *service,
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}
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}
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else
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- status = NSS_STATUS_UNAVAIL;
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+ {
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+ status = NSS_STATUS_UNAVAIL;
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+ /* Could not load any of the lookup functions. Indicate
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+ an internal error if the failure was due to a system
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+ error other than the file not being found. We use the
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+ errno from the last failed callback. */
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+ if (errno != 0 && errno != ENOENT)
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+ __set_h_errno (NETDB_INTERNAL);
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+ }
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}
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if (nss_next_action (nip, status) == NSS_ACTION_RETURN)
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@@ -1050,7 +1058,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
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_res.options |= old_res_options & RES_USE_INET6;
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- if (status == NSS_STATUS_UNAVAIL)
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+ if (h_errno == NETDB_INTERNAL)
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{
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result = GAIH_OKIFUNSPEC | -EAI_SYSTEM;
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goto free_and_return;
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