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connected: close err_fd in promisor fast-path#2303

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ethanndickson:connected-close-err-fd
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connected: close err_fd in promisor fast-path#2303
ethanndickson wants to merge 1 commit into
git:maintfrom
ethanndickson:connected-close-err-fd

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connected.h documents that err_fd is closed before check_connected()
returns. It is, on three of four exit paths. The promisor-pack fast
path added in 5003377 (connected: verify promisor-ness of partial
clone, 2020-01-30) returns 0 without closing it.

receive-pack uses err_fd as the write end of an async sideband
muxer's pipe, and the muxer thread waits for EOF. The same omission
has caused deadlocks there twice before: 49ecfa1 (receive-pack:
close sideband fd on early pack errors, 2013-04-19) and 6cdad1f
(receive-pack: fix deadlock when we cannot create tmpdir,
2017-03-07).

Signed-off-by: Ethan Dickson <ethanndickson@gmail.com>
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@dscho
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dscho commented May 15, 2026

/allow

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User ethanndickson is now allowed to use GitGitGadget.

WARNING: ethanndickson has no public email address set on GitHub; GitGitGadget needs an email address to Cc: you on your contribution, so that you receive any feedback on the Git mailing list. Go to https://github.com/settings/profile to make your preferred email public to let GitGitGadget know which email address to use.

@ethanndickson
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/preview

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Preview email sent as pull.2303.git.git.1778826709157.gitgitgadget@gmail.com

@ethanndickson
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/submit

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Submitted as pull.2303.git.git.1778827194448.gitgitgadget@gmail.com

To fetch this version into FETCH_HEAD:

git fetch https://github.com/gitgitgadget/git/ pr-git-2303/ethanndickson/connected-close-err-fd-v1

To fetch this version to local tag pr-git-2303/ethanndickson/connected-close-err-fd-v1:

git fetch --no-tags https://github.com/gitgitgadget/git/ tag pr-git-2303/ethanndickson/connected-close-err-fd-v1

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This patch series was integrated into seen via 74dfe4b.

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This branch is now known as ed/check-connected-close-err-fd-2.53.

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This patch series was integrated into seen via 3fabacb.

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This patch series was integrated into seen via 824a6e7.

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There was a status update in the "Cooking" section about the branch ed/check-connected-close-err-fd-2.53 on the Git mailing list:

File descriptor leak fix (for 2.54 maintenance track).

Will be merged together with ed/check-connected-close-err-fd topic.
source: <pull.2303.git.git.1778827194448.gitgitgadget@gmail.com>

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This patch series was integrated into seen via 1260522.

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This patch series was integrated into seen via dc238cf.

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This patch series was integrated into seen via 0f37d16.

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This patch series was integrated into seen via c4e6477.

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This patch series was integrated into seen via 8179c2e.

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This patch series was integrated into next via 1017d0e.

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There was a status update in the "Cooking" section about the branch ed/check-connected-close-err-fd-2.53 on the Git mailing list:

File descriptor leak fix (for 2.54 maintenance track).

Will merge to 'master'.
source: <pull.2303.git.git.1778827194448.gitgitgadget@gmail.com>

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