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Re: [PATCH] update-index: Don't copy memory around

From
Junio C Hamano <gitster@pobox.com>
Date
Mar 23, 2015, 17:11 UTC
Message-ID
<xmqq1tkfbpw3.fsf@gitster.dls.corp.google.com>
In-Reply-To
<1427129620-13380-1-git-send-email-sbeller@google.com>
Stefan Beller <sbeller@google.com> writes:
> ... though I do not understand
> why. This passes the test suite, so I wonder if this patch would be a subtle bug
> now.

I recall the last time I traced the code I noticed that the ce can get passed to a codepath that causes its removal from update_one(), and then the pathname itself (which used to be ce->name but remember that ce is invalid already at that point!) is still used after ce is removed, which was the reason why you would introduce a bug if you stop copying the path. You may have to follow the code again a bit closer to make sure but I am reasonably sure that was the reason.

Previous: Stefan BellerNext: Stefan Beller
Message 20 of 44 in “Fixing memory leaks”
  1. 00/15 Fixing memory leaksStefan Beller, Mar 21, 2015
  2. 01/15 read-cache: fix memleakStefan Beller, Mar 21, 2015
  3. Junio C HamanoMar 21, 2015
  4. Stefan BellerMar 23, 2015
  5. 1/2 read-cache: fix memleakStefan Beller, Mar 23, 2015
  6. 2/2 read-cache.c: fix a memleak in add_to_indexStefan Beller, Mar 23, 2015
  7. Junio C HamanoMar 23, 2015
  8. Junio C HamanoMar 23, 2015
  9. 02/15 read-cache: Improve readabilityStefan Beller, Mar 21, 2015
  10. Junio C HamanoMar 21, 2015
  11. Stefan BellerMar 21, 2015
  12. Junio C HamanoMar 22, 2015
  13. 03/15 read-cache: free cache entry in add_to_index in case of early returnStefan Beller, Mar 21, 2015
  14. Junio C HamanoMar 21, 2015
  15. Stefan BellerMar 21, 2015
  16. Junio C HamanoMar 22, 2015
  17. 04/15 update-index: fix a memleakStefan Beller, Mar 21, 2015
  18. Junio C HamanoMar 21, 2015
  19. update-index: Don't copy memory aroundStefan Beller, Mar 23, 2015
  20. Junio C HamanoMar 23, 2015
  21. 05/15 builtin/apply.c: fix a memleakStefan Beller, Mar 21, 2015
  22. Junio C HamanoMar 21, 2015
  23. builtin/apply.c: fix a memleak (Fixup, squashable)Stefan Beller, Mar 23, 2015
  24. Junio C HamanoMar 23, 2015
  25. 06/15 merge-blobs.c: Fix a memleakStefan Beller, Mar 21, 2015
  26. 07/15 merge-recursive: fix memleaksStefan Beller, Mar 21, 2015
  27. Junio C HamanoMar 21, 2015
  28. 08/15 http-push: Remove unneeded cleanupStefan Beller, Mar 21, 2015
  29. 09/15 http: release the memory of a http pack request as wellStefan Beller, Mar 21, 2015
  30. Junio C HamanoMar 22, 2015
  31. Stefan BellerMar 24, 2015
  32. Junio C HamanoMar 24, 2015
  33. 10/15 commit.c: fix a memory leakStefan Beller, Mar 21, 2015
  34. Junio C HamanoMar 21, 2015
  35. Duy NguyenMar 24, 2015
  36. Re* [PATCH 10/15] commit.c: fix a memory leakJunio C Hamano, Mar 24, 2015
  37. Stefan BellerMar 24, 2015
  38. 11/15 builtin/check-attr: fix a memleakStefan Beller, Mar 21, 2015
  39. Junio C HamanoMar 21, 2015
  40. 12/15 builtin/merge-base: fix memleakStefan Beller, Mar 21, 2015
  41. 13/15 builtin/unpack-file: fix a memleakStefan Beller, Mar 21, 2015
  42. 14/15 builtin/cat-file: free memleakStefan Beller, Mar 21, 2015
  43. 15/15 ls-files: fix a memleakStefan Beller, Mar 21, 2015
  44. Junio C HamanoMar 21, 2015

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