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de3c514234
My prior commit here introduced a bug due to copy/paste,
it was iterating the links assigned to 'ctx->replace_ctx'
and I replaced it by iterating links assigned to 'ctx' by
accident, then modified it for the iteration later.
Fix it to iterate the users of the correct chanctx, i.e.
'ctx->replace_ctx'.
Ultimately, this issue led to a crash in a hwsim test
(multi_ap_wps_shared_apdev_csa) because it would actually
do the switch (rather than refuse here) and then later
have a double-free of the original chanctx, because it
was still in use by another interface yet freed as part
of the switching.
Fixes: a1dc648aa7 ("wifi: mac80211: remove chanctx to link back-references")
Link: https://patch.msgid.link/20251121113733.7710a58d45eb.Ie9ec010b52b1baed93dbe44f968c2119b6b5d98d@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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
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https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText 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.