Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: wan: fsl_qmc_hdlc: Convert carrier_lock spinlock to a mutex The carrier_lock spinlock protects the carrier detection. While it is held, framer_get_status() is called which in turn takes a mutex. This is not correct and can lead to a deadlock. A run with PROVE_LOCKING enabled detected the issue: [ BUG: Invalid wait context ] ... c204ddbc (&framer->mutex){+.+.}-{3:3}, at: framer_get_status+0x40/0x78 other info that might help us debug this: context-{4:4} 2 locks held by ifconfig/146: #0: c0926a38 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x12c/0x664 #1: c2006a40 (&qmc_hdlc->carrier_lock){....}-{2:2}, at: qmc_hdlc_framer_set_carrier+0x30/0x98 Avoid the spinlock usage and convert carrier_lock to a mutex.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 54762918ca856028d33d1d56d017a4d7706c6196 before f223d2b4acb7a45a6e0581cb380e1af1a6dc7ab9; affected 54762918ca856028d33d1d56d017a4d7706c6196 before c4d6a347ba7babdf9d90a0eb24048c266cae0532 |
| Linux / Linux | affected 6.9; unaffected 0 before 6.9; unaffected 6.10.4 through 6.10.*; unaffected 6.11 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/f223d2b4acb7a45a6e0581cb380e1af1a6dc7ab9
- https://git.kernel.org/stable/c/c4d6a347ba7babdf9d90a0eb24048c266cae0532
ADP enrichment
No English description supplied.
No references supplied.