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b5a78c7127
When mapping a file on overlayfs, the file stored in ->vm_file is a backing file whose f_inode is on the underlying filesystem. We need to verify that /proc/pid/maps contains numbers of the overlayfs file, but not its backing file. Cc: Amir Goldstein <amir73il@gmail.com> Cc: Alexander Mikhalitsyn <alexander@mihalicyn.com> Signed-off-by: Andrei Vagin <avagin@google.com> Link: https://lore.kernel.org/r/20231214064439.1023011-2-avagin@google.com Reviewed-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Christian Brauner <brauner@kernel.org>