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https://abf.rosa.ru/djam/pam.git
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84 lines
2.8 KiB
Diff
84 lines
2.8 KiB
Diff
From 50ab1eda259ff039922b2774895f09bf0a57e078 Mon Sep 17 00:00:00 2001
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From: Andreas Schneider <asn@cryptomilk.org>
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Date: Wed, 4 Nov 2020 17:21:47 +0100
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Subject: [PATCH 1/2] libpam: Fix memory leak with pam_start_confdir()
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Found with AddressSanitzer in pam_wrapper tests.
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==985738== 44 bytes in 4 blocks are definitely lost in loss record 18 of 18
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==985738== at 0x4839809: malloc (vg_replace_malloc.c:307)
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==985738== by 0x48957E1: _pam_strdup (pam_misc.c:129)
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==985738== by 0x489851B: _pam_start_internal (pam_start.c:85)
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==985738== by 0x4849C8C: libpam_pam_start_confdir (pam_wrapper.c:418)
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==985738== by 0x484AF94: pwrap_pam_start (pam_wrapper.c:1461)
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==985738== by 0x484AFEE: pam_start (pam_wrapper.c:1483)
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==985738== by 0x401723: setup_noconv (test_pam_wrapper.c:189)
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==985738== by 0x4889E82: ??? (in /usr/lib64/libcmocka.so.0.7.0)
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==985738== by 0x488A444: _cmocka_run_group_tests (in /usr/lib64/libcmocka.so.0.7.0)
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==985738== by 0x403EE5: main (test_pam_wrapper.c:1059)
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Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
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---
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libpam/pam_end.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/libpam/pam_end.c b/libpam/pam_end.c
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index 942253d8..406b1478 100644
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--- a/libpam/pam_end.c
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+++ b/libpam/pam_end.c
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@@ -56,6 +56,9 @@ int pam_end(pam_handle_t *pamh, int pam_status)
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_pam_overwrite(pamh->user);
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_pam_drop(pamh->user);
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+ _pam_overwrite(pamh->confdir);
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+ _pam_drop(pamh->confdir);
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+
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_pam_overwrite(pamh->prompt);
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_pam_drop(pamh->prompt); /* prompt for pam_get_user() */
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--
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2.26.2
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From 51318fd423a8ab4456a278ef0aff6ad449aab916 Mon Sep 17 00:00:00 2001
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From: Andreas Schneider <asn@cryptomilk.org>
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Date: Wed, 4 Nov 2020 17:23:09 +0100
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Subject: [PATCH 2/2] libpam: Fix memory leak on error path in
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_pam_start_internal()
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Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
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---
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libpam/pam_start.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/libpam/pam_start.c b/libpam/pam_start.c
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index 59d06224..99dd0389 100644
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--- a/libpam/pam_start.c
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+++ b/libpam/pam_start.c
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@@ -115,6 +115,7 @@ static int _pam_start_internal (
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pam_syslog(*pamh, LOG_CRIT, "pam_start: malloc failed for pam_conv");
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_pam_drop((*pamh)->service_name);
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_pam_drop((*pamh)->user);
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+ _pam_drop((*pamh)->confdir);
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_pam_drop(*pamh);
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return (PAM_BUF_ERR);
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} else {
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@@ -128,6 +129,7 @@ static int _pam_start_internal (
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_pam_drop((*pamh)->pam_conversation);
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_pam_drop((*pamh)->service_name);
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_pam_drop((*pamh)->user);
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+ _pam_drop((*pamh)->confdir);
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_pam_drop(*pamh);
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return PAM_ABORT;
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}
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@@ -145,6 +147,7 @@ static int _pam_start_internal (
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_pam_drop((*pamh)->pam_conversation);
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_pam_drop((*pamh)->service_name);
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_pam_drop((*pamh)->user);
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+ _pam_drop((*pamh)->confdir);
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_pam_drop(*pamh);
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return PAM_ABORT;
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}
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--
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2.26.2
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