Diffusion FreeBSD src repository 9ebf9100bad1

ptrace: do not allow for parallel ptrace requests
9ebf9100bad1
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Description

ptrace: do not allow for parallel ptrace requests

Set a new P2_PTRACEREQ flag around the request Wait for the target .
process P2_PTRACEREQ flag to clear before setting ours .

Otherwise, we rely on the moment that the process lock is not dropped
until the stopped target state is important. This is going to be no
longer true after some future change.

Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D29955

Details

Provenance

kib	Authored on Apr 24 2021, 11:57 AM

Reviewer

markj

Differential Revision

D29955: ptrace(PT_COREDUMP)

Parents

rG54c8baa02195: kern_ptrace(): extract code to determine ptrace eligibility into helper

Branches

Unknown

Tags

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Event Timeline

kib committed rG9ebf9100bad1: ptrace: do not allow for parallel ptrace requests (authored by kib).May 3 2021, 4:16 PM

kib added an edge: D29955: ptrace(PT_COREDUMP).May 3 2021, 4:21 PM

kib mentioned this in rG4495cd6e7e50: ptrace: do not allow for parallel ptrace requests.May 10 2021, 1:15 AM

Changes (2)

Path

Size

sys/

kern/

sys_process.c

sys/

proc.h

rG9ebf9100bad1

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sys/kern/sys_process.c