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| author |   Al Viro <viro@zeniv.linux.org.uk> | 2025-08-14 23:32:26 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2025-08-19 12:00:07 -0400 |
| commit | da025cdb97a23c1916d8491925b878f3e1de0bca (patch) | |
| tree | 63cec32b7b9a1211bc67df47e6837f556fc87828 /tools/perf/scripts/python | |
| parent | fix the softlockups in attach_recursive_mnt() (diff) | |
| download | wireguard-linux-da025cdb97a23c1916d8491925b878f3e1de0bca.tar.xz wireguard-linux-da025cdb97a23c1916d8491925b878f3e1de0bca.zip | |
propagate_umount(): only surviving overmounts should be reparented
... as the comments in reparent() clearly say. As it is, we reparent
*all* overmounts of the mounts being taken out, including those that
are taken out themselves. It's not only a potentially massive slowdown
(on a pathological setup we might end up with O(N^2) time for N mounts
being kicked out), it can end up with incorrect ->overmount in the
surviving mounts.
Fixes: f0d0ba19985d "Rewrite of propagate_umount()"
Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions