fix preserve-fds flag may cause runc hang#2000
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crosbymichael merged 1 commit intoopencontainers:masterfrom Mar 4, 2019
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fix preserve-fds flag may cause runc hang#2000crosbymichael merged 1 commit intoopencontainers:masterfrom
crosbymichael merged 1 commit intoopencontainers:masterfrom
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cyphar
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cyphar
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Mar 1, 2019
Signed-off-by: lifubang <lifubang@acmcoder.com>
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LGTM |
thaJeztah
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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>
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--preserve-fdsmay caluserunc createandrunc runhang.If preserve-fds > 3, and /dev/fd/5 is not exist, runc will hang.
Because at that time, there is a socket pair for
runc init,one of it's fd is 5.
So, when we pass preserve-fds flag, we need to check whether these fds is exist.
Signed-off-by: lifubang lifubang@acmcoder.com