From: Taylor Blau <me@ttaylorr.com>
To: git@vger.kernel.org
Cc: vdye@github.com, jonathantanmy@google.com, gitster@pobox.com
Subject: [PATCH 0/2] pack-objects: fix a pair of MIDX bitmap-related races
Date: Fri, 13 May 2022 12:23:14 -0400 [thread overview]
Message-ID: <cover.1652458395.git.me@ttaylorr.com> (raw)
This series fixes two races related to using multi-pack bitmaps in pack-objects.
The crux of both is that we call `is_pack_valid()` far too late, leaving us in a
situation where `pack-objects` committed to using objects from a specific pack
in the MIDX bitmap, without having actually opened those packs. So if those
packs are removed in the background (e.g., due to a simultaneous repack),
any ongoing clones or fetches will see this error message:
remote: Enumerating objects: 1498802, done.
remote: fatal: packfile ./objects/pack/pack-$HASH.pack cannot be accessed
remote: aborting due to possible repository corruption on the remote side.
See 4c08018204 (pack-objects: protect against disappearing packs, 2011-10-14)
and bab919bd44 (pack-bitmap: check pack validity when opening bitmap,
2015-03-26) for previous treatment of similar issues.
Taylor Blau (2):
pack-bitmap: check preferred pack validity when opening MIDX bitmap
builtin/pack-objects.c: ensure pack validity from MIDX bitmap objects
builtin/pack-objects.c | 8 ++++++--
pack-bitmap.c | 19 +++++++++++++++++--
2 files changed, 23 insertions(+), 4 deletions(-)
--
2.36.1.76.g80c0bcd80e
next reply other threads:[~2022-05-13 16:23 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-13 16:23 Taylor Blau [this message]
2022-05-13 16:23 ` [PATCH 1/2] pack-bitmap: check preferred pack validity when opening MIDX bitmap Taylor Blau
2022-05-13 18:19 ` Junio C Hamano
2022-05-13 19:55 ` Taylor Blau
2022-05-13 16:23 ` [PATCH 2/2] builtin/pack-objects.c: ensure pack validity from MIDX bitmap objects Taylor Blau
2022-05-13 23:06 ` Jonathan Tan
2022-05-14 13:17 ` Taylor Blau
2022-05-16 6:07 ` Jonathan Tan
2022-05-14 13:34 ` Taylor Blau
2022-05-16 6:11 ` Jonathan Tan
2022-05-24 18:54 ` [PATCH v2 0/4] pack-objects: fix a pair of MIDX bitmap-related races Taylor Blau
2022-05-24 18:54 ` [PATCH v2 1/4] pack-bitmap.c: check preferred pack validity when opening MIDX bitmap Taylor Blau
2022-05-24 19:36 ` Ævar Arnfjörð Bjarmason
2022-05-24 21:38 ` Taylor Blau
2022-05-24 21:51 ` Ævar Arnfjörð Bjarmason
2022-05-24 18:54 ` [PATCH v2 2/4] builtin/pack-objects.c: avoid redundant NULL check Taylor Blau
2022-05-24 21:44 ` Junio C Hamano
2022-05-25 0:11 ` Taylor Blau
2022-05-24 18:54 ` [PATCH v2 3/4] builtin/pack-objects.c: ensure included `--stdin-packs` exist Taylor Blau
2022-05-24 19:46 ` Ævar Arnfjörð Bjarmason
2022-05-24 21:33 ` Taylor Blau
2022-05-24 21:49 ` Ævar Arnfjörð Bjarmason
2022-05-24 22:03 ` Junio C Hamano
2022-05-25 0:14 ` Taylor Blau
2022-05-26 19:21 ` Victoria Dye
2022-05-26 20:05 ` Taylor Blau
2022-05-24 18:54 ` [PATCH v2 4/4] builtin/pack-objects.c: ensure pack validity from MIDX bitmap objects Taylor Blau
2022-05-24 21:38 ` [PATCH v2 0/4] pack-objects: fix a pair of MIDX bitmap-related races Junio C Hamano
2022-05-25 0:16 ` Taylor Blau
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