CVE-2023-53480
Description
In the Linux kernel, the following vulnerability has been resolved: kobject: Add sanity check for kset->kobj.ktype in kset_register() When I register a kset in the following way: static struct kset my_kset; kobject_set_name(&my_kset.kobj, "my_kset"); ret = kset_register(&my_kset); A null pointer dereference exception is occurred: [ 4453.568337] Unable to handle kernel NULL pointer dereference at \ virtual address 0000000000000028 ... ... [ 4453.810361] Call trace: [ 4453.813062] kobject_get_ownership+0xc/0x34 [ 4453.817493] kobject_add_internal+0x98/0x274 [ 4453.822005] kset_register+0x5c/0xb4 [ 4453.825820] my_kobj_init+0x44/0x1000 [my_kset] ... ... Because I didn't initialize my_kset.kobj.ktype. According to the description in Documentation/core-api/kobject.rst: - A ktype is the type of object that embeds a kobject. Every structure that embeds a kobject needs a corresponding ktype. So add sanity check to make sure kset->kobj.ktype is not NULL.
How to fix
- linux linux_kernel4.19.295, 5.4.257, 5.10.197, 5.15.133, 6.1.55, 6.5.5 or later
- git.kernel.org/stable/c/039ec9db2d30032eafa365f5f89b30eca5322b05
- git.kernel.org/stable/c/1a772881bc059c596d8ca587cbd2a233edce3d3b
- git.kernel.org/stable/c/48aebbe801e78a8932404c122ed0e880ccedc220
- git.kernel.org/stable/c/4d0fe8c52bb3029d83e323c961221156ab98680b
- git.kernel.org/stable/c/5df5829158513134ddcaf2184d9286eda7b0bb18
- git.kernel.org/stable/c/964e025ceefdf75da46b0133d0c2790de451aeec
- git.kernel.org/stable/c/f3f6bf22a4f5ba649cf26ae4670de5c7f861bdef
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 4.19 ≤ v < 4.19.295, 4.20 ≤ v < 5.4.257, 5.5 ≤ v < 5.10.197, 5.11 ≤ v < 5.15.133, 5.16 ≤ v < 6.1.55, 6.2 ≤ v < 6.5.5 | 4.19.295, 5.4.257, 5.10.197, 5.15.133, 6.1.55, 6.5.5 |
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