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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Shuah Khan , Simon Horman , david decotigny Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-kselftest@vger.kernel.org, asantostc@gmail.com, efault@gmx.de, calvin@wbinvd.org, kernel-team@meta.com, calvin@wbinvd.org, jv@jvosburgh.net, Breno Leitao , stable@vger.kernel.org X-Mailer: b4 0.15-dev-dd21f X-Developer-Signature: v=1; a=openpgp-sha256; l=2160; i=leitao@debian.org; h=from:subject:message-id; bh=z0CqdaKtG3FXMT+SGr/8fspurJp6wIxXOOHn9NBLkew=; b=owEBbQKS/ZANAwAIATWjk5/8eHdtAcsmYgBoyq77SqEFfQYQIeE0oilLdana10QcJmXq1NYfh 0NII2YzuHGJAjMEAAEIAB0WIQSshTmm6PRnAspKQ5s1o5Of/Hh3bQUCaMqu+wAKCRA1o5Of/Hh3 bTiXD/99+CjULWfW0x5zaGcailnXvJJh/yLySYqlL+wAw/wRoxS0kGxDVpTJjxwcJpQjyyO47fI tikEHJ8t6RewkSEHO4UCDvZM5+ex6aCY8zzi1Gg2hjP/pUX+cD4djQAiEFLKkB7bJKpJpiqTtwv oSsUQTC9D1F2fWZ8zwnPVEXw4v6w3H2+CHfQCv1kqYkzm7rT3Xyxrjs7DuKEKbnk8r4zBCsUu28 HfmJQMfDrvUhaC3fvZKCznwvE/0Vg8RqMEXCrYHxib08YVm1LZRGN0cLhW2E1YJLxxiZJQAMiqs 2XMXGTs0/AbUqLvViHtBNWoIcW5PXMH3gpzQbJLaSIc8vdKZCdxOOzKZS8eYnF8Sy7HF90QECcv LJ2tuQGPREaU7FRKOUeTlveuJv/+7fZtJw4ACW9CbS4fUim2y5M4bjN221I1/rI4Z8e+VPwRAha ou20Y29IymiHjqBM2MrxKcNafaVjL8d9cZnU7c0EBUAaMfp0OJedlZpRsyD6sywjKjsPy0cRLFh Tn7A1VEls/sqj6GKwhhgjJsb/+uytRprX6fU9MRg3hM7ZZCoDtPvgCfkzHc4p3W/4Ecn1Sy2I9O qa5nhL9CuxeLakwRKjaB67gF+UH4F0tfIQPxWIvM3GNeevYfYjSZ/tnXHnzRr/CFsY0hRa5+Px0 vOPvPH/y11fEKYA== X-Developer-Key: i=leitao@debian.org; a=openpgp; fpr=AC8539A6E8F46702CA4A439B35A3939FFC78776D Fix a memory leak in netpoll and introduce netconsole selftests that expose the issue when running with kmemleak detection enabled. This patchset includes a selftest for netpoll with multiple concurrent users (netconsole + bonding), which simulates the scenario from test[1] that originally demonstrated the issue allegedly fixed by commit efa95b01da18 ("netpoll: fix use after free") - a commit that is now being reverted. Sending this to "net" branch because this is a fix, and the selftest might help with the backports validation. Link: https://lore.kernel.org/lkml/96b940137a50e5c387687bb4f57de8b0435a653f.1404857349.git.decot@googlers.com/ [1] Signed-off-by: Breno Leitao --- Changes in v4: - Added an additional selftest to test multiple netpoll users in parallel - Link to v3: https://lore.kernel.org/r/20250905-netconsole_torture-v3-0-875c7febd316@debian.org Changes in v3: - This patchset is a merge of the fix and the selftest together as recommended by Jakub. Changes in v2: - Reuse the netconsole creation from lib_netcons.sh. Thus, refactoring the create_dynamic_target() (Jakub) - Move the "wait" to after all the messages has been sent. - Link to v1: https://lore.kernel.org/r/20250902-netconsole_torture-v1-1-03c6066598e9@debian.org --- Breno Leitao (4): net: netpoll: fix incorrect refcount handling causing incorrect cleanup selftest: netcons: refactor target creation selftest: netcons: create a torture test selftest: netcons: add test for netconsole over bonded interfaces net/core/netpoll.c | 7 +- tools/testing/selftests/drivers/net/Makefile | 2 + .../selftests/drivers/net/lib/sh/lib_netcons.sh | 197 ++++++++++++++++++--- .../selftests/drivers/net/netcons_over_bonding.sh | 76 ++++++++ .../selftests/drivers/net/netcons_torture.sh | 127 +++++++++++++ 5 files changed, 384 insertions(+), 25 deletions(-) --- base-commit: 5e87fdc37f8dc619549d49ba5c951b369ce7c136 change-id: 20250902-netconsole_torture-8fc23f0aca99 Best regards, -- Breno Leitao