From: Stanislav Kinsburskiy <skinsbur...@parallels.com>

This is required to allow mounts in nested namespaces.

https://jira.sw.ru/browse/PSBM-40137

Signed-off-by: Stanislav Kinsburskiy <skinsbur...@parallels.com>
---
 fs/binfmt_misc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index 90c306e..2be9b62 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -748,7 +748,7 @@ static struct file_system_type bm_fs_type = {
        .name           = "binfmt_misc",
        .mount          = bm_mount,
        .kill_sb        = kill_litter_super,
-       .fs_flags       = FS_VIRTUALIZED,
+       .fs_flags       = FS_VIRTUALIZED | FS_USERNS_MOUNT,
 };
 MODULE_ALIAS_FS("binfmt_misc");
 

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