File 0009-journal-do-not-leak-mmaps-on-OOM.patch of Package systemd

Overview Repositories Revisions Requests Users Attributes Meta

File 0009-journal-do-not-leak-mmaps-on-OOM.patch of Package systemd (Revision f923b8e6426d10f9150a0416ac25fb2d)

Currently displaying revision f923b8e6426d10f9150a0416ac25fb2d , Show latest

From b67ddc7bbe31cde7f69f9814204d9bb1d4623c47 Mon Sep 17 00:00:00 2001
From: Philippe De Swert <philippedeswert@gmail.com>
Date: Wed, 10 Sep 2014 12:20:41 +0300
Subject: [PATCH] journal: do not leak mmaps on OOM

After a section of memory is succesfully allocated, some of the following
actions can still fail due to lack of memory. In this case -ENOMEM is
returned without actually freeing the already mapped memory.
Found with coverity. Fixes: CID#1237762
---
 src/journal/mmap-cache.c |   10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git src/journal/mmap-cache.c src/journal/mmap-cache.c
index 7dbbb5e..908562d 100644
--- src/journal/mmap-cache.c
+++ src/journal/mmap-cache.c
@@ -496,15 +496,15 @@ static int add_mmap(
 
         c = context_add(m, context);
         if (!c)
-                return -ENOMEM;
+                goto outofmem;
 
         f = fd_add(m, fd);
         if (!f)
-                return -ENOMEM;
+                goto outofmem;
 
         w = window_add(m);
         if (!w)
-                return -ENOMEM;
+                goto outofmem;
 
         w->keep_always = keep_always;
         w->ptr = d;
@@ -522,6 +522,10 @@ static int add_mmap(
         if (ret)
                 *ret = (uint8_t*) w->ptr + (offset - w->offset);
         return 1;
+
+outofmem:
+        munmap(d, wsize);
+        return -ENOMEM;
 }
 
 int mmap_cache_get(
-- 
1.7.9.2

Places

File 0009-journal-do-not-leak-mmaps-on-OOM.patch of Package systemd (Revision f923b8e6426d10f9150a0416ac25fb2d)

Places