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| author | Christian Brauner <brauner@kernel.org> | 2026-01-12 18:47:08 +0300 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2026-03-04 15:21:00 +0300 |
| commit | e75e091a331e98e85b8a98886e8ad79905a55cdf (patch) | |
| tree | b89437c981779f959242f2a7cc7665ae5d0cf968 | |
| parent | 1acb28123e57b50d737377f400f57eec889fe5e4 (diff) | |
| download | linux-e75e091a331e98e85b8a98886e8ad79905a55cdf.tar.xz | |
fs: ensure that internal tmpfs mount gets mount id zero
[ Upstream commit a2062463e894039a6fdc2334b96afd91d44b64a8 ]
and the rootfs get mount id one as it always has. Before we actually
mount the rootfs we create an internal tmpfs mount which has mount id
zero but is never exposed anywhere. Continue that "tradition".
Link: https://patch.msgid.link/20260112-work-immutable-rootfs-v2-1-88dd1c34a204@kernel.org
Fixes: 7f9bfafc5f49 ("fs: use xarray for old mount id")
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | fs/namespace.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/namespace.c b/fs/namespace.c index 5b31682db450..b312905c2be5 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -221,7 +221,7 @@ static int mnt_alloc_id(struct mount *mnt) int res; xa_lock(&mnt_id_xa); - res = __xa_alloc(&mnt_id_xa, &mnt->mnt_id, mnt, XA_LIMIT(1, INT_MAX), GFP_KERNEL); + res = __xa_alloc(&mnt_id_xa, &mnt->mnt_id, mnt, xa_limit_31b, GFP_KERNEL); if (!res) mnt->mnt_id_unique = ++mnt_id_ctr; xa_unlock(&mnt_id_xa); |