Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: dsa: microchip: Added the condition for scheduling ksz_mib_read_work When the ksz module is installed and removed using rmmod, kernel crashes with null pointer dereferrence error. During rmmod, ksz_switch_remove function tries to cancel the mib_read_workqueue using cancel_delayed_work_sync routine and unregister switch from dsa. During dsa_unregister_switch it calls ksz_mac_link_down, which in turn reschedules the workqueue since mib_interval is non-zero. Due to which queue executed after mib_interval and it tries to access dp->slave. But the slave is unregistered in the ksz_switch_remove function. Hence kernel crashes. To avoid this crash, before canceling the workqueue, resetted the mib_interval to 0. v1 -> v2: -Removed the if condition in ksz_mib_read_work
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 469b390e1ba330e888175e55d78573db2e9a8cb4 before f2e1de075018cf71bcd7d628e9f759cb8540b0c3; affected 469b390e1ba330e888175e55d78573db2e9a8cb4 before 383239a33cf29ebee9ce0d4e0e5c900b77a16148; affected 469b390e1ba330e888175e55d78573db2e9a8cb4 before ef1100ef20f29aec4e62abeccdb5bdbebba1e378 |
| Linux / Linux | affected 5.7; unaffected 0 before 5.7; unaffected 5.10.75 through 5.10.*; unaffected 5.14.14 through 5.14.*; unaffected 5.15 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/f2e1de075018cf71bcd7d628e9f759cb8540b0c3
- https://git.kernel.org/stable/c/383239a33cf29ebee9ce0d4e0e5c900b77a16148
- https://git.kernel.org/stable/c/ef1100ef20f29aec4e62abeccdb5bdbebba1e378
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.