CVE-2026-72039: bnx2x: fix potential memory leak in bnx2x_alloc_mem_bp()

CVE-2026-72039: bnx2x: fix potential memory leak in bnx2x_alloc_mem_bp()

[Greg Kroah-Hartman]

From: Greg Kroah-Hartman <gregkh@kernel.org>

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

bnx2x: fix potential memory leak in bnx2x_alloc_mem_bp()

If the allocation of fp[i].tpa_info fails, the error path will not free
the struct bnx2x_fastpath allocated earlier, as it is not linked to the
bp structure yet. Fix that by linking it immediately after allocation.

The Linux kernel CVE team has assigned CVE-2026-72039 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 3.6 with commit 15192a8cf8a8d16e0ff38a144c8a4630c94f9fd6 and fixed in 5.10.261 with commit 58594ed2a2f859ffb93edbbfa4aabb7739bea383
	Issue introduced in 3.6 with commit 15192a8cf8a8d16e0ff38a144c8a4630c94f9fd6 and fixed in 5.15.212 with commit c51b280b9cd3c9e97bf2cde33bb795c511f09669
	Issue introduced in 3.6 with commit 15192a8cf8a8d16e0ff38a144c8a4630c94f9fd6 and fixed in 6.1.178 with commit 6d46eaa1e4c078ad674908e24b86e431a7fd4b15
	Issue introduced in 3.6 with commit 15192a8cf8a8d16e0ff38a144c8a4630c94f9fd6 and fixed in 6.6.145 with commit 5576ee19a6a4aa111c61ce974e70bb79e7bb3952
	Issue introduced in 3.6 with commit 15192a8cf8a8d16e0ff38a144c8a4630c94f9fd6 and fixed in 6.12.97 with commit 7d8d454b5d24dbad346cd57ef315e7bf1ee8e856
	Issue introduced in 3.6 with commit 15192a8cf8a8d16e0ff38a144c8a4630c94f9fd6 and fixed in 6.18.40 with commit 6c98ccdb9a0967e04a7b1866eb0d97c0c8c0e403
	Issue introduced in 3.6 with commit 15192a8cf8a8d16e0ff38a144c8a4630c94f9fd6 and fixed in 7.1.5 with commit 356077547b1afa34a8ebae77176a577631a89041
	Issue introduced in 3.6 with commit 15192a8cf8a8d16e0ff38a144c8a4630c94f9fd6 and fixed in 7.2-rc1 with commit a986fde914d88af47eb78fd29c5d1af7952c3500

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2026-72039
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/58594ed2a2f859ffb93edbbfa4aabb7739bea383
	https://git.kernel.org/stable/c/c51b280b9cd3c9e97bf2cde33bb795c511f09669
	https://git.kernel.org/stable/c/6d46eaa1e4c078ad674908e24b86e431a7fd4b15
	https://git.kernel.org/stable/c/5576ee19a6a4aa111c61ce974e70bb79e7bb3952
	https://git.kernel.org/stable/c/7d8d454b5d24dbad346cd57ef315e7bf1ee8e856
	https://git.kernel.org/stable/c/6c98ccdb9a0967e04a7b1866eb0d97c0c8c0e403
	https://git.kernel.org/stable/c/356077547b1afa34a8ebae77176a577631a89041
	https://git.kernel.org/stable/c/a986fde914d88af47eb78fd29c5d1af7952c3500