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Helen Koike 98d09766ce tipc: fix infinite loop in __tipc_nl_compat_dumpit 
[ Upstream commit 22f8aa3596 ]

cmd->dumpit callback can return a negative errno, causing an infinite
loop due to the while(len) condition. As the loop never terminates,
genl_mutex is never released, and other tasks waiting on it starve in D
state.

Check dumpit's return value, propagate it and jump to err_out on error.

Reported-by: syzbot+85d0bec020d805014a3a@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=85d0bec020d805014a3a
Fixes: d0796d1ef6 ("tipc: convert legacy nl bearer dump to nl compat")
Signed-off-by: Helen Koike <koike@igalia.com>
Reviewed-by: Tung Nguyen <tung.quang.nguyen@est.tech
Reviewed-by: Tung Nguyen <tung.quang.nguyen@est.tech>
Link: https://patch.msgid.link/20260713204940.647668-1-koike@igalia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2026-08-19 17:13:58 +02:00
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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.