Description
In the Linux kernel, the following vulnerability has been resolved: media: dvbdev: adopts refcnt to avoid UAF dvb_unregister_device() is known that prone to use-after-free. That is, the cleanup from dvb_unregister_device() releases the dvb_device even if there are pointers stored in file->private_data still refer to it. This patch adds a reference counter into struct dvb_device and delays its deallocation until no pointer refers to the object.
Product status
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before ac521bbe3d00fa574e66a9361763f2b37725bc97
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 219b44bf94203bd433aa91b7796475bf656348e5
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 6d18b44bb44e1f4d97dfe0efe92ac0f0984739c2
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 2abd73433872194bccdf1432a0980e4ec5273c2a
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 88a6f8a72d167294c0931c7874941bf37a41b6dd
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before a2f0a08aa613176c9688c81d7b598a7779974991
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 9945d05d6693710574f354c5dbddc47f5101eb77
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 0fc044b2b5e2d05a1fa1fb0d7f270367a7855d79
4.14.303 (semver)
4.19.270 (semver)
5.4.229 (semver)
5.10.163 (semver)
5.15.86 (semver)
6.0.16 (semver)
6.1.2 (semver)
6.2 (original_commit_for_fix)
References
git.kernel.org/...c/ac521bbe3d00fa574e66a9361763f2b37725bc97
git.kernel.org/...c/219b44bf94203bd433aa91b7796475bf656348e5
git.kernel.org/...c/6d18b44bb44e1f4d97dfe0efe92ac0f0984739c2
git.kernel.org/...c/2abd73433872194bccdf1432a0980e4ec5273c2a
git.kernel.org/...c/88a6f8a72d167294c0931c7874941bf37a41b6dd
git.kernel.org/...c/a2f0a08aa613176c9688c81d7b598a7779974991
git.kernel.org/...c/9945d05d6693710574f354c5dbddc47f5101eb77
git.kernel.org/...c/0fc044b2b5e2d05a1fa1fb0d7f270367a7855d79
