Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: firmware: dmi-sysfs: Fix null-ptr-deref in dmi_sysfs_register_handle KASAN reported a null-ptr-deref error: KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 1373 Comm: modprobe Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) RIP: 0010:dmi_sysfs_entry_release ... Call Trace: <TASK> kobject_put dmi_sysfs_register_handle (drivers/firmware/dmi-sysfs.c:540) dmi_sysfs dmi_decode_table (drivers/firmware/dmi_scan.c:133) dmi_walk (drivers/firmware/dmi_scan.c:1115) dmi_sysfs_init (drivers/firmware/dmi-sysfs.c:149) dmi_sysfs do_one_initcall (init/main.c:1296) ... Kernel panic - not syncing: Fatal exception Kernel Offset: 0x4000000 from 0xffffffff81000000 ---[ end Kernel panic - not syncing: Fatal exception ]--- It is because previous patch added kobject_put() to release the memory which will call dmi_sysfs_entry_release() and list_del(). However, list_add_tail(entry->list) is called after the error block, so the list_head is uninitialized and cannot be deleted. Move error handling to after list_add_tail to fix this.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected fdffa4ad8f6bf1ece877edfb807f2b2c729d8578 before b4fe158259fb5fead52ff2b55841ec5c39492604; affected 660ba678f9998aca6db74f2dd912fa5124f0fa31 before e851996b32264e78a10863c2ac41a8689d7b9252; affected 660ba678f9998aca6db74f2dd912fa5124f0fa31 before 5d0492d1d934642bdfd2057acc1b56f4b57be465; affected 660ba678f9998aca6db74f2dd912fa5124f0fa31 before 18e126e97c961f7a93823795c879d7c085fe5098; affected a9bfb37d6ba7c376b0d53337a4c5f5ff324bd725; affected ed38d04342dfbe9e5aca745c8b5eb4188a74f0ef; affected c66cc3c62870a27ea8f060a7e4c1ad8d26dd3f0d; affected a724634b2a49f6ff0177a9e19a5a92fc1545e1b7; affected 985706bd3bbeffc8737bc05965ca8d24837bc7db; affected 3ba359ebe914ac3f8c6c832b28007c14c39d3766; affected ec752973aa721ee281d5441e497364637c626c7b; affected 5.15.47 before 5.15.99; affected 4.9.318 before 4.10; affected 4.14.283 before 4.15; affected 4.19.247 before 4.20; affected 5.4.198 before 5.5; affected 5.10.122 before 5.11; affected 5.17.15 before 5.18; affected 5.18.4 before 5.19 |
| Linux / Linux | affected 5.19; unaffected 0 before 5.19; unaffected 5.15.99 through 5.15.*; unaffected 6.1.16 through 6.1.*; unaffected 6.2.3 through 6.2.*; unaffected 6.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/b4fe158259fb5fead52ff2b55841ec5c39492604
- https://git.kernel.org/stable/c/e851996b32264e78a10863c2ac41a8689d7b9252
- https://git.kernel.org/stable/c/5d0492d1d934642bdfd2057acc1b56f4b57be465
- https://git.kernel.org/stable/c/18e126e97c961f7a93823795c879d7c085fe5098
ADP enrichment
No English description supplied.
No references supplied.