fs/9p: fix uaf in in v9fs_stat2inode_dotl

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The incorrect logical order of accessing the st object code in v9fs_fid_iget_dotl
is causing this uaf.

Fixes: 724a08450f ("fs/9p: simplify iget to remove unnecessary paths")
Reported-and-tested-by: syzbot+7a3d75905ea1a830dbe5@syzkaller.appspotmail.com
Signed-off-by: Lizhi Xu <lizhi.xu@windriver.com>
Tested-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Dominique Martinet <asmadeus@codewreck.org>
Signed-off-by: Eric Van Hensbergen <ericvh@kernel.org>

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Lizhi Xu 2024-02-02 20:15:31 +08:00 • committed by Eric Van Hensbergen

parent 4cece76496

commit 11763a8598

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fs/9p/vfs_inode_dotl.c

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