Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: drm/bridge: megachips: Fix a null pointer dereference bug When removing the module we will get the following warning: [ 31.911505] i2c-core: driver [stdp2690-ge-b850v3-fw] unregistered [ 31.912484] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI [ 31.913338] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] [ 31.915280] RIP: 0010:drm_bridge_remove+0x97/0x130 [ 31.921825] Call Trace: [ 31.922533] stdp4028_ge_b850v3_fw_remove+0x34/0x60 [megachips_stdpxxxx_ge_b850v3_fw] [ 31.923139] i2c_device_remove+0x181/0x1f0 The two bridges (stdp2690, stdp4028) do not probe at the same time, so the driver does not call ge_b850v3_resgiter() when probing, causing the driver to try to remove the object that has not been initialized. Fix this by checking whether both the bridges are probed.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 7649972d97fb98578fbc4a351416cf72895e7c4d before aaa512ad1e59f2edf8a9e4f2b167a44b24670679; affected 16e3827904932eccfba0915f0c93b519de3536ac before 5bc20bafcd87ba0858ab772cefc7047cb51bc249; affected 50ad94f8654a53ec9ca3604a7a23cbaf166e0119 before 1daf69228e310938177119c4eadcd30fc75c81e0; affected b8d10f601f226f055df8b5368d7ea7f369136cd5 before 877e92e9b1bdeb580b31a46061005936be902cd4; affected 405856460d3e7aefb7c1aef047ec88fc4ef2e2a5 before 4610e7a4111fa3f3ce27c09d6d94008c55f1cd31; affected 11632d4aa2b3f126790e81a4415d6c23103cf8bb before 21764467ab396d9f08921e0a5ffa1214244e1ad9; affected 11632d4aa2b3f126790e81a4415d6c23103cf8bb before 7371fad5cfe6eada6bb5523c895fd6074b15c2b9; affected 11632d4aa2b3f126790e81a4415d6c23103cf8bb before 1ff673333d46d2c1b053ebd0c1c7c7c79e36943e; affected e449461989f0674f188d30494ffd3f5ba74c1a05; affected 4.14.263 before 4.14.296; affected 4.19.226 before 4.19.262; affected 5.4.174 before 5.4.220; affected 5.10.94 before 5.10.150; affected 5.15.17 before 5.15.75; affected 5.16.3 before 5.17 |
| Linux / Linux | affected 5.17; unaffected 0 before 5.17; unaffected 4.14.296 through 4.14.*; unaffected 4.19.262 through 4.19.*; unaffected 5.4.220 through 5.4.*; unaffected 5.10.150 through 5.10.*; unaffected 5.15.75 through 5.15.*; unaffected 5.19.17 through 5.19.*; unaffected 6.0.3 through 6.0.*; unaffected 6.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/aaa512ad1e59f2edf8a9e4f2b167a44b24670679
- https://git.kernel.org/stable/c/5bc20bafcd87ba0858ab772cefc7047cb51bc249
- https://git.kernel.org/stable/c/1daf69228e310938177119c4eadcd30fc75c81e0
- https://git.kernel.org/stable/c/877e92e9b1bdeb580b31a46061005936be902cd4
- https://git.kernel.org/stable/c/4610e7a4111fa3f3ce27c09d6d94008c55f1cd31
- https://git.kernel.org/stable/c/21764467ab396d9f08921e0a5ffa1214244e1ad9
- https://git.kernel.org/stable/c/7371fad5cfe6eada6bb5523c895fd6074b15c2b9
- https://git.kernel.org/stable/c/1ff673333d46d2c1b053ebd0c1c7c7c79e36943e