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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-12-21 09:54:00 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-12-21 09:54:00 -0800 |
| commit | 04065c12072b6124475c7c4f6ad7484475a2f66e (patch) | |
| tree | d16f36709fe220e98b63362ab82fa2244c060d03 | |
| parent | d264dd3bbbd16b56239e889023fbe49413a58eaf (diff) | |
| parent | 11933cf1d91d57da9e5c53822a540bbdc2656c16 (diff) | |
| download | pci-04065c12072b6124475c7c4f6ad7484475a2f66e.tar.gz | |
Merge tag 'fs.mount.propagation.fix.v6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping
Pull mount propagation fix from Christian Brauner:
"The propagate_mnt() function handles mount propagation when creating
mounts and propagates the source mount tree @source_mnt to all
applicable nodes of the destination propagation mount tree headed by
@dest_mnt.
Unfortunately it contains a bug where it fails to terminate at peers
of @source_mnt when looking up copies of the source mount that become
masters for copies of the source mount tree mounted on top of slaves
in the destination propagation tree causing a NULL dereference.
This fixes that bug (with a long commit message for a seven character
fix but hopefully it'll help us fix issues faster in the future rather
than having to go through the pain of having to relearn everything
once more)"
* tag 'fs.mount.propagation.fix.v6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping:
pnode: terminate at peers of source
| -rw-r--r-- | fs/pnode.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/pnode.c b/fs/pnode.c index 1106137c747a3a..468e4e65a615d7 100644 --- a/fs/pnode.c +++ b/fs/pnode.c @@ -244,7 +244,7 @@ static int propagate_one(struct mount *m) } do { struct mount *parent = last_source->mnt_parent; - if (last_source == first_source) + if (peers(last_source, first_source)) break; done = parent->mnt_master == p; if (done && peers(n, parent)) |