[1.1] nsexec: retry unshare on EINVAL #3776
Merged
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
kolyshkin
force-pushed
the
1.1-retry-unshare
branch
2 times, most recently
from
5ddbdbd to
cbc51f2
Compare
AkihiroSuda
approved these changes
Mar 18, 2023
cyphar
approved these changes
Mar 26, 2023
Older kernels may return EINVAL on unshare when a process is reading
runc's /proc/$PID/status or /proc/$PID/maps. This was fixed by kernel
commit 12c641ab8270f ("unshare: Unsharing a thread does not require
unsharing a vm") in Linux v4.3.
For CentOS 7, the fix was backported to CentOS 7.7 (kernel 3.10.0-1062).
To work around this kernel bug, let's retry on EINVAL a few times.
Reported-by: zzyyzte <[email protected]>
Signed-off-by: Kir Kolyshkin <[email protected]>
(cherry picked from commit cecb039)
Signed-off-by: Kir Kolyshkin <[email protected]>
cyphar
force-pushed
the
1.1-retry-unshare
branch
from
cbc51f2 to
8ec02ea
Compare
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
4 participants
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This is a backport of #3772 to the release-1.1 branch. Original description follows.
Older kernels may return EINVAL on unshare when a process is reading runc's /proc/$PID/status or /proc/$PID/maps. This was fixed by kernel commit 12c641ab8270f ("unshare: Unsharing a thread does not require unsharing a vm") in Linux v4.3.
For CentOS 7, the fix was backported to CentOS 7.7 (kernel 3.10.0-1062).
To work around this kernel bug, let's retry on EINVAL a few times.
Reported-by: zzyyzte [email protected]
(cherry picked from commit cecb039)