lihao/jemalloc
1
0
Fork 0
mirror of https://github.com/jemalloc/jemalloc.git synced 2026-07-22 04:03:11 +00:00
Code Issues Packages Projects Releases Wiki Activity

Fix large calloc() zeroing bugs.

Browse Source 
Refactor code such that arena_mapbits_{large,small}_set() always
preserves the unzeroed flag, and manually manipulate the unzeroed flag
in the one case where it actually gets reset (in arena_chunk_purge()).
This fixes unzeroed preservation bugs in arena_run_split() and
arena_ralloc_large_grow().  These bugs caused large calloc() to return
non-zeroed memory under some circumstances.
This commit is contained in:
Jason Evans
2012-05-10 20:59:39 -07:00
parent 30fe12b866
commit d8ceef6c55
3 changed files with 29 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
ChangeLog
View File

@@ -71,6 +71,7 @@ found in the git revision history:
write-after-free memory corruption.
- Fix a potential deadlock that could occur during interval- and
growth-triggered heap profile dumps.
- Fix large calloc() zeroing bugs due to dropping chunk map unzeroed flags.
- Fix chunk_alloc_dss() to stop claiming memory is zeroed. This bug could
cause memory corruption and crashes with --enable-dss specified.
- Fix fork-related bugs that could cause deadlock in children between fork