exec: expose --preserve-fds #1995
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Seems reasonable, though I would like an integration test. |
This was referenced Feb 25, 2019
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The implementation is already there, we only need to add the CLI option and pass it down. Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
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tests are passing now |
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LGTM. |
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LGTM |
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@caniszczyk pull-approve is taking a long time to detect LGTMs. |
thaJeztah
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Mar 7, 2019
This includes an improved fix for CVE-2019-5736 to reduce the increased memory-consumption introduced by the original patch, RHEL 7.6 getting into a loop due to a kernel bug in those kernels, and improve compatibility with older kernels. changes included: - opencontainers/runc#1973 Vendor opencontainers/runtime-spec 29686dbc - opencontainers/runc#1978 Remove detection for scope properties, which have always been broken - opencontainers/runc#1963 Vendor in go-criu and use it for CRIU's RPC definition - opencontainers/runc#1995 exec: expose --preserve-fds - opencontainers/runc#2000 fix preserve-fds flag may cause runc hang - opencontainers/runc#1968 Create bind mount mountpoints during restore - opencontainers/runc#1984 nsenter: cloned_binary: "memfd" cleanups Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
thaJeztah
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Mar 7, 2019
This includes an improved fix for CVE-2019-5736 to reduce the increased memory-consumption introduced by the original patch, RHEL 7.6 getting into a loop due to a kernel bug in those kernels, and improve compatibility with older kernels. changes included: - opencontainers/runc#1973 Vendor opencontainers/runtime-spec 29686dbc - opencontainers/runc#1978 Remove detection for scope properties, which have always been broken - opencontainers/runc#1963 Vendor in go-criu and use it for CRIU's RPC definition - opencontainers/runc#1995 exec: expose --preserve-fds - opencontainers/runc#2000 fix preserve-fds flag may cause runc hang - opencontainers/runc#1968 Create bind mount mountpoints during restore - opencontainers/runc#1984 nsenter: cloned_binary: "memfd" cleanups Signed-off-by: Sebastiaan van Stijn <github@gone.nl> (cherry picked from commit b8d40b3) Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
thaJeztah
added a commit
to thaJeztah/containerd
that referenced
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Mar 7, 2019
This includes an improved fix for CVE-2019-5736 to reduce the increased memory-consumption introduced by the original patch, RHEL 7.6 getting into a loop due to a kernel bug in those kernels, and improve compatibility with older kernels. changes included: - opencontainers/runc#1973 Vendor opencontainers/runtime-spec 29686dbc - opencontainers/runc#1978 Remove detection for scope properties, which have always been broken - opencontainers/runc#1963 Vendor in go-criu and use it for CRIU's RPC definition - opencontainers/runc#1995 exec: expose --preserve-fds - opencontainers/runc#2000 fix preserve-fds flag may cause runc hang - opencontainers/runc#1968 Create bind mount mountpoints during restore - opencontainers/runc#1984 nsenter: cloned_binary: "memfd" cleanups Signed-off-by: Sebastiaan van Stijn <github@gone.nl> (cherry picked from commit b8d40b3) Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
kolyshkin
reviewed
Oct 22, 2020
| runc run -d --console-socket $CONSOLE_SOCKET test_busybox | ||
| [ "$status" -eq 0 ] | ||
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| run bash -c "cat hello > preserve-fds.test; exec 3<preserve-fds.test; $RUNC --log /proc/self/fd/2 --root $ROOT exec --preserve-fds=1 test_busybox cat /proc/self/fd/3" |
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What I don't understand is why cat hello is not failing. There is no such file named hello.
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I guess the error is just ignored but the file is still created by the shell. I guess it had to be echo but too long ago to remember :)
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I mean, yes, cat hello should fail and this is ignored by bash since it does not run with set -e.
What I don't understand is how the check below (that checks that $output contains hello works at all.
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@giuseppe pointed out that cat hello produces the message like cat: hello: no such file or directory, and thus the check for hello in the $output succeeds!
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The implementation is already there, we only need to add the CLI
option and pass it down.
Signed-off-by: Giuseppe Scrivano gscrivan@redhat.com