tree 4e91cfe6105deafa9ee002cf2efcb8480a44238f
parent 757f54c8171cb9fb147a273bf766d1309923e391
author Benjamin Gordon <bmgordon@chromium.org> 1585338582 -0600
committer Commit Bot <commit-bot@chromium.org> 1636484863 +0000

CHROMIUM: fs/namespace.c: Copy nosymfollow to flags

The nosymfollow mount option used to be implemented in the chromiumos
LSM.  Since it wasn't a recognized flag, it was passed in the data
parameter to mount() and parsed out by the LSM.  Now that
crrev.com/c/2121041 adds a MNT_NOSYMFOLLOW option, symlink blocking is
moving over to this flag instead of the LSM.  For backwards
compatibility, we need to set the flag if nosymfollow is in the string
options until all callers are updated.

BUG=b:152074038,b:146991686,b:152076835
TEST=mount -onosymfollow and check /proc/self/mountinfo
Change-Id: I8eae5b9badd68a40f32ef758ceafe3f0d3d2629c
Signed-off-by: Benjamin Gordon <bmgordon@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/2125239
Reviewed-by: Ross Zwisler <zwisler@google.com>
(cherry picked from commit 90a3c9336ad5049cfaef2a88b82738c578c7a685)
Signed-off-by: Sarthak Kukreti <sarthakkukreti@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/3261332
Commit-Queue: Sarthak Kukreti <sarthakkukreti@chromium.org>
Tested-by: Sarthak Kukreti <sarthakkukreti@chromium.org>