Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: phy: fix null-ptr-deref while probe() failed I got a null-ptr-deref report as following when doing fault injection test: BUG: kernel NULL pointer dereference, address: 0000000000000058 Oops: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 1 PID: 253 Comm: 507-spi-dm9051 Tainted: G B N 6.1.0-rc3+ Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:klist_put+0x2d/0xd0 Call Trace: <TASK> klist_remove+0xf1/0x1c0 device_release_driver_internal+0x23e/0x2d0 bus_remove_device+0x1bd/0x240 device_del+0x357/0x770 phy_device_remove+0x11/0x30 mdiobus_unregister+0xa5/0x140 release_nodes+0x6a/0xa0 devres_release_all+0xf8/0x150 device_unbind_cleanup+0x19/0xd0 //probe path: phy_device_register() device_add() phy_connect phy_attach_direct() //set device driver probe() //it's failed, driver is not bound device_bind_driver() // probe failed, it's not called //remove path: phy_device_remove() device_del() device_release_driver_internal() __device_release_driver() //dev->drv is not NULL klist_remove() <- knode_driver is not added yet, cause null-ptr-deref In phy_attach_direct(), after setting the 'dev->driver', probe() fails, device_bind_driver() is not called, so the knode_driver->n_klist is not set, then it causes null-ptr-deref in __device_release_driver() while deleting device. Fix this by setting dev->driver to NULL in the error path in phy_attach_direct().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e13934563db047043ccead26412f552375cea90c before 8aaafe0f71314f46a066382a047ba8bb3840d273; affected e13934563db047043ccead26412f552375cea90c before 51d7f6b20fae8bae64ad1136f1e30d1fd5ba78f7; affected e13934563db047043ccead26412f552375cea90c before 0744c7be4de564db03e24527b2e096b7e0e20972; affected e13934563db047043ccead26412f552375cea90c before 3e21f85d87c836462bb52ef2078ea561260935c1; affected e13934563db047043ccead26412f552375cea90c before fe6bc99c27c21348f548966118867ed26a9a372c; affected e13934563db047043ccead26412f552375cea90c before 7730904f50c7187dd16c76949efb56b5fb55cd57; affected e13934563db047043ccead26412f552375cea90c before eaa5722549ac2604ffa56c2e946acc83226f130c; affected e13934563db047043ccead26412f552375cea90c before 369eb2c9f1f72adbe91e0ea8efb130f0a2ba11a6 |
| Linux / Linux | affected 2.6.14; unaffected 0 before 2.6.14; unaffected 4.9.335 through 4.9.*; unaffected 4.14.301 through 4.14.*; unaffected 4.19.268 through 4.19.*; unaffected 5.4.226 through 5.4.*; unaffected 5.10.158 through 5.10.*; unaffected 5.15.82 through 5.15.*; unaffected 6.0.12 through 6.0.*; unaffected 6.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/8aaafe0f71314f46a066382a047ba8bb3840d273
- https://git.kernel.org/stable/c/51d7f6b20fae8bae64ad1136f1e30d1fd5ba78f7
- https://git.kernel.org/stable/c/0744c7be4de564db03e24527b2e096b7e0e20972
- https://git.kernel.org/stable/c/3e21f85d87c836462bb52ef2078ea561260935c1
- https://git.kernel.org/stable/c/fe6bc99c27c21348f548966118867ed26a9a372c
- https://git.kernel.org/stable/c/7730904f50c7187dd16c76949efb56b5fb55cd57
- https://git.kernel.org/stable/c/eaa5722549ac2604ffa56c2e946acc83226f130c
- https://git.kernel.org/stable/c/369eb2c9f1f72adbe91e0ea8efb130f0a2ba11a6
ADP enrichment
No English description supplied.
No references supplied.