Description
In the Linux kernel, the following vulnerability has been resolved: cxl: fix possible null-ptr-deref in cxl_guest_init_afu|adapter() If device_register() fails in cxl_register_afu|adapter(), the device is not added, device_unregister() can not be called in the error path, otherwise it will cause a null-ptr-deref because of removing not added device. As comment of device_register() says, it should use put_device() to give up the reference in the error path. So split device_unregister() into device_del() and put_device(), then goes to put dev when register fails.
Product status
14baf4d9c739e6e69150512d2eb23c71fffcc192 before 96fba6fb95bdede80583c262ac185da09661f264
14baf4d9c739e6e69150512d2eb23c71fffcc192 before 1ae581696b7a799afa39a664c4b721569643f58a
14baf4d9c739e6e69150512d2eb23c71fffcc192 before d775a1da5a52b4f4bb02f2707ba420d1bec48dbb
14baf4d9c739e6e69150512d2eb23c71fffcc192 before 60b2ed21a65f3f5318666ccd765c3507991370cf
14baf4d9c739e6e69150512d2eb23c71fffcc192 before 170e8c2d2b61e15e7f7cfeded81bc1e959a15ed8
14baf4d9c739e6e69150512d2eb23c71fffcc192 before e5021bbf11b024cc65ea1e84c377df484183be4b
14baf4d9c739e6e69150512d2eb23c71fffcc192 before b32559ee4e6667c5c3daf4ec5454c277d1f255d2
14baf4d9c739e6e69150512d2eb23c71fffcc192 before ab44c182353be101c3be9465e1d15d42130c53c4
14baf4d9c739e6e69150512d2eb23c71fffcc192 before 61c80d1c3833e196256fb060382db94f24d3d9a7
4.6
Any version before 4.6
4.9.337
4.14.303
4.19.270
5.4.229
5.10.163
5.15.86
6.0.16
6.1.2
6.2
References
git.kernel.org/...c/96fba6fb95bdede80583c262ac185da09661f264
git.kernel.org/...c/1ae581696b7a799afa39a664c4b721569643f58a
git.kernel.org/...c/d775a1da5a52b4f4bb02f2707ba420d1bec48dbb
git.kernel.org/...c/60b2ed21a65f3f5318666ccd765c3507991370cf
git.kernel.org/...c/170e8c2d2b61e15e7f7cfeded81bc1e959a15ed8
git.kernel.org/...c/e5021bbf11b024cc65ea1e84c377df484183be4b
git.kernel.org/...c/b32559ee4e6667c5c3daf4ec5454c277d1f255d2
git.kernel.org/...c/ab44c182353be101c3be9465e1d15d42130c53c4
git.kernel.org/...c/61c80d1c3833e196256fb060382db94f24d3d9a7
