Thread (88 messages) 88 messages, 6 authors, 2025-10-29

Re: [PATCH v3 05/70] nsfs: raise SB_I_NODEV and SB_I_NOEXEC

From: Jeff Layton <jlayton@kernel.org>
Date: 2025-10-27 13:13:24
Also in: bpf, cgroups, linux-fsdevel, lkml

On Fri, 2025-10-24 at 12:52 +0200, Christian Brauner wrote:
quoted hunk ↗ jump to hunk
There's zero need for nsfs to allow device nodes or execution.

Signed-off-by: Christian Brauner <brauner@kernel.org>
---
 fs/nsfs.c | 2 ++
 1 file changed, 2 insertions(+)
diff --git a/fs/nsfs.c b/fs/nsfs.c
index 0e3fe8fda5bf..363be226e357 100644
--- a/fs/nsfs.c
+++ b/fs/nsfs.c
@@ -589,6 +589,8 @@ static int nsfs_init_fs_context(struct fs_context *fc)
 	struct pseudo_fs_context *ctx = init_pseudo(fc, NSFS_MAGIC);
 	if (!ctx)
 		return -ENOMEM;
+	fc->s_iflags |= SB_I_NOEXEC;
+	fc->s_iflags |= SB_I_NODEV;
nit: why not do this in one?

	fc->s_iflags |= SB_I_NOEXEC | SB_I_NODEV;
 	ctx->s_d_flags |= DCACHE_DONTCACHE;
 	ctx->ops = &nsfs_ops;
 	ctx->eops = &nsfs_export_operations;
-- 
Jeff Layton [off-list ref]
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