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File _service:tar_scm:backport-nss-systemd-fix-required-buffer-size-calculation.patch of Package systemd
From 5f78618a44a21197e727cd1c62da5aa8bf7e0610 Mon Sep 17 00:00:00 2001 From: Yu Watanabe <watanabe.yu+github@gmail.com> Date: Fri, 31 Dec 2021 00:31:51 +0900 Subject: [PATCH] nss-systemd: fix required buffer size calculation This also fixes the pointer assigned to the gr_mem element of struct group. Fixes a bug introduced by 47fd7fa6c650d7a0ac41bc89747e3b866ffb9534. Fixes #21935. (cherry picked from commit 1e65eb8f9b7d567462030b2e625998d77677e636) (cherry picked from commit 17227e81ab8a9bdfac679d450ed35434435a6ff8) Conflict:NA Reference:https://github.com/systemd/systemd/commit/5f78618a44a21197e727cd1c62da5aa8bf7e0610 --- src/nss-systemd/nss-systemd.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/nss-systemd/nss-systemd.c b/src/nss-systemd/nss-systemd.c index 1840a0d508..7aea3652c4 100644 --- a/src/nss-systemd/nss-systemd.c +++ b/src/nss-systemd/nss-systemd.c @@ -236,7 +236,7 @@ static enum nss_status copy_synthesized_group( required = strlen(src->gr_name) + 1; required += strlen(src->gr_passwd) + 1; - required += 1; /* ...but that NULL still needs to be stored into the buffer! */ + required += sizeof(char*); /* ...but that NULL still needs to be stored into the buffer! */ if (buflen < required) { *errnop = ERANGE; @@ -250,7 +250,7 @@ static enum nss_status copy_synthesized_group( /* String fields point into the user-provided buffer */ dest->gr_name = buffer; dest->gr_passwd = stpcpy(dest->gr_name, src->gr_name) + 1; - dest->gr_mem = (char **) strcpy(dest->gr_passwd, src->gr_passwd) + 1; + dest->gr_mem = (char **) stpcpy(dest->gr_passwd, src->gr_passwd) + 1; *dest->gr_mem = NULL; return NSS_STATUS_SUCCESS; -- 2.33.0
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