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Jann HornandGreg Kroah-Hartman
480faed292
[ Upstream commit642335f3ea] A file handle that userspace provides to open_by_handle_at() can legitimately contain an outdated inode number that has since been reused for another purpose - that's why the file handle also contains a generation number. But if the inode number has been reused for an ea_inode, check_igot_inode() will notice, __ext4_iget() will go through ext4_error_inode(), and if the inode was newly created, it will also be marked as bad by iget_failed(). This all happens before the point where the inode generation is checked. ext4_error_inode() is supposed to only be used on filesystem corruption; it should not be used when userspace just got unlucky with a stale file handle. So when this happens, let __ext4_iget() just return an error. Fixes:b3e6bcb945("ext4: add EA_INODE checking to ext4_iget()") Signed-off-by: Jann Horn <jannh@google.com> Reviewed-by: Jan Kara <jack@suse.cz> Link: https://patch.msgid.link/20241129-ext4-ignore-ea-fhandle-v1-1-e532c0d1cee0@google.com Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Sasha Levin <sashal@kernel.org>