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42 lines
1.5 KiB
42 lines
1.5 KiB
From 45f3c8e04093a1ed871eb67aa4c1c28b11d3346c Mon Sep 17 00:00:00 2001 |
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From: Jan Synacek <jan.synacek@gmail.com> |
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Date: Tue, 3 Jan 2017 21:34:36 +0100 |
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Subject: [PATCH] shared: fix double free in unmask (#5005) |
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Easily reproducible: |
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1) systemctl mask foo |
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2) systemctl unmask foo foo |
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The problem here is that the *i that is put into todo[] is later freed |
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in strv_uniq(), which is not directly visible from this patch. Somewhere |
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further in the code, the string that *i pointed to is freed again. That |
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happens only when multiple services with the same name/path are specified. |
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(cherry picked from commit dc7dd61de610e9330abe7014860acfa733887d5e) |
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Resolves: #1409997 |
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--- |
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src/shared/install.c | 4 ++-- |
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1 file changed, 2 insertions(+), 2 deletions(-) |
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diff --git a/src/shared/install.c b/src/shared/install.c |
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index f01a21262..1b59a96b1 100644 |
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--- a/src/shared/install.c |
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+++ b/src/shared/install.c |
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@@ -1602,7 +1602,7 @@ int unit_file_unmask( |
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_cleanup_set_free_free_ Set *remove_symlinks_to = NULL; |
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_cleanup_free_ char *config_path = NULL; |
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- _cleanup_free_ char **todo = NULL; |
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+ _cleanup_strv_free_ char **todo = NULL; |
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size_t n_todo = 0, n_allocated = 0; |
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char **i; |
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int r, q; |
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@@ -1639,7 +1639,7 @@ int unit_file_unmask( |
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if (!GREEDY_REALLOC0(todo, n_allocated, n_todo + 2)) |
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return -ENOMEM; |
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- todo[n_todo++] = *i; |
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+ todo[n_todo++] = strdup(*i); |
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} |
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strv_uniq(todo);
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