Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: pinctrl: devicetree: don't free uninitialized dev_name on error path dt_remember_or_free_map() duplicates dev_name for each map entry. If kstrdup_const() fails, dt_free_map() frees dev_name in all num_maps entries, including entries that have not been initialized. Some pinctrl drivers, including pinctrl-imx, allocate the map with kmalloc() and leave dev_name for the core to initialize. The untouched entries therefore contain uninitialized data which is passed to kfree_const(). Reproduced on qemu's mcimx6ul-evk (pinctrl-imx) with failslab injection while binding the pinctrl-consuming device, under KASAN: BUG: KASAN: double-free in dt_free_map+0x34/0xa4 Free of addr c425a900 by task init/1 kfree from dt_free_map+0x34/0xa4 dt_free_map from dt_remember_or_free_map+0x184/0x198 dt_remember_or_free_map from pinctrl_dt_to_map+0x33c/0x4c8 pinctrl_dt_to_map from create_pinctrl+0x9c/0x5c0 Initialize all dev_name fields to NULL before duplicating the device name, making the full-map cleanup safe after a partial failure.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected be4c60b563edee3712d392aaeb0943a768df7023 before e3cfb22bad363bebcfd55d909e12d499cb8c5490; affected be4c60b563edee3712d392aaeb0943a768df7023 before 1586423da2739a80871ef6240016fcb9c7339bfb; affected be4c60b563edee3712d392aaeb0943a768df7023 before dec5f0a8080502908dec5e35597c7ae07d533a3b; affected be4c60b563edee3712d392aaeb0943a768df7023 before 929f6396baade89999ec8a1281232c101cbc727d; affected be4c60b563edee3712d392aaeb0943a768df7023 before 321fe3584a8298386938130d138191aa35040b75; affected be4c60b563edee3712d392aaeb0943a768df7023 before ad0ad3c228b6f76fde10f32047e0ec5fbc109dc8; affected be4c60b563edee3712d392aaeb0943a768df7023 before 9d00a5ac7cd3d32ae61140f4b8a62f136de84e7d; affected be4c60b563edee3712d392aaeb0943a768df7023 before 015b5bcbcb622b32317642be91a7f79aa5413649; affected 03f69244302d7954f42f528ea2d45903ebbf59f3; affected 77440c3a37203e3f4667d06e37f76ef3968d2d8c; affected 679c4f27b8958b65bb51d1c3dfdbf3befe4a33a3; affected f88ac1330779c5bfdd79f7d7f7d4d3343c782f92; affected f739a699db7d5a5cf39ca3ce2c84e4fe4a8f4c5d; affected 4.4.244 before 4.5; affected 4.9.244 before 4.10; affected 4.14.161 before 4.15; affected 4.19.92 before 4.20; affected 5.4.7 before 5.5 |
| Linux / Linux | affected 5.5; unaffected 0 before 5.5; unaffected 5.10.265 through 5.10.*; unaffected 5.15.216 through 5.15.*; unaffected 6.1.183 through 6.1.*; unaffected 6.6.151 through 6.6.*; unaffected 6.12.103 through 6.12.*; unaffected 6.18.44 through 6.18.*; unaffected 7.1.8 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/e3cfb22bad363bebcfd55d909e12d499cb8c5490
- https://git.kernel.org/stable/c/1586423da2739a80871ef6240016fcb9c7339bfb
- https://git.kernel.org/stable/c/dec5f0a8080502908dec5e35597c7ae07d533a3b
- https://git.kernel.org/stable/c/929f6396baade89999ec8a1281232c101cbc727d
- https://git.kernel.org/stable/c/321fe3584a8298386938130d138191aa35040b75
- https://git.kernel.org/stable/c/ad0ad3c228b6f76fde10f32047e0ec5fbc109dc8
- https://git.kernel.org/stable/c/9d00a5ac7cd3d32ae61140f4b8a62f136de84e7d
- https://git.kernel.org/stable/c/015b5bcbcb622b32317642be91a7f79aa5413649
ADP enrichment
No English description supplied.
No references supplied.