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Don't recurse on non-recursive lock
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Authored by tuexen on Apr 1 2022, 11:16 PM.

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Details

Reviewers

rrs
lstewart
rscheff

Group Reviewers

transport

Commits

rGccdfd621d070: tcp cc: don't recurse on non recursive mutex

Summary

Don't call cc_deregister_algo(), which locks the cc_list mutex, with the cc_list mutex hold.

This was found by syzkaller.

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Repository

rG FreeBSD src repository

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Tests Not Applicable

Event Timeline

tuexen created this revision.Apr 1 2022, 11:16 PM

Herald added a reviewer: transport. · View Herald TranscriptApr 1 2022, 11:16 PM

Herald added subscribers: glebius, melifaro, imp. · View Herald Transcript

tuexen requested review of this revision.Apr 1 2022, 11:16 PM

rrs accepted this revision.Apr 4 2022, 6:21 PM

This revision is now accepted and ready to land.Apr 4 2022, 6:21 PM

Closed by commit rGccdfd621d070: tcp cc: don't recurse on non recursive mutex (authored by tuexen). · Explain WhyApr 5 2022, 11:53 AM

This revision was automatically updated to reflect the committed changes.

tuexen added a commit: rGccdfd621d070: tcp cc: don't recurse on non recursive mutex.

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Path

Size

sys/

netinet/

cc/

cc.c

29 lines

Diff 104614

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Don't recurse on non-recursive lockClosedPublicActions