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pipe: keep uio_iovcnt consistent

Description

pipe: keep uio_iovcnt consistent

In pipe_build_write_buffer we increment uio_iov but did not update
uio_iovcnt. This would not cause an OOB read (thanks to to uio_resid)
but is inconsistent and could be an issue if other code changes are made
in the future.

Reported by: Synacktiv
Reviewed by: jhb, markj, brooks
Sponsored by: The Alpha-Omega Project
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D45999

(cherry picked from commit d8ff42e816848a0d4a427755b46b8560cb86ebc8)

Details

Provenance
emasteAuthored on Jul 17 2024, 2:33 PM
Reviewer
jhb
Differential Revision
D45999: pipe: keep uio_iovcnt consistent
Parents
rG6fb0634bc4ce: linuxkpi: use canonical tests for is_{zero,broadcast}_ether_addr
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