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| Filename | Latest commit message | Latest commit date |
|---|---|---|
5871166a1c
[ Upstream commit 642335f3ea2b3fd6dba03e57e01fa9587843a497 ]
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legitimately contain an outdated inode number that has since been reused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: b3e6bcb94590 ("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>
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| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.