Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_tcm: fix deadlock in usbg_make_tpg() usbg_make_tpg() held dep_lock while calling configfs_depend_item_unlocked(), which acquires the configfs root inode lock when operating across subsystems. This creates a circular lock dependency with configfs_rmdir(): dep_lock -> configfs root inode lock -> su_mutex -> dep_lock In usbg_make_tpg(), dep_lock only serialized the read of opts->ready, which is a monotonic flag that transitions from false to true exactly once (in tcm_set_name()) and never reverts. Remove dep_lock from usbg_make_tpg() entirely and use READ_ONCE/WRITE_ONCE to access opts->ready locklessly instead.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 4bb8548df632187d5db50878e71804af5f7c51ad before abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277; affected 4bb8548df632187d5db50878e71804af5f7c51ad before 3639438a4c83ffc2e564c8c010b92137c5d11cfa; affected 4bb8548df632187d5db50878e71804af5f7c51ad before 78a14ea2284825055ab6c2a1f3489510f560f3a2; affected 4bb8548df632187d5db50878e71804af5f7c51ad before eef3e62f90d86c1c5651742f84ecc9db1814a893; affected 4bb8548df632187d5db50878e71804af5f7c51ad before f81a2da137b029a282b9bc64d2f267d242948659; affected 4bb8548df632187d5db50878e71804af5f7c51ad before 6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9; affected 4bb8548df632187d5db50878e71804af5f7c51ad before d90b0f90e30cd59b36005a4016b15cf02bcd7fb2; affected 4bb8548df632187d5db50878e71804af5f7c51ad before 9dbf74f4022f80f7669d2b3c22c5deb46c1b5674 |
| Linux / Linux | affected 4.5; unaffected 0 before 4.5; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.109 through 6.12.*; unaffected 6.18.50 through 6.18.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277
- https://git.kernel.org/stable/c/3639438a4c83ffc2e564c8c010b92137c5d11cfa
- https://git.kernel.org/stable/c/78a14ea2284825055ab6c2a1f3489510f560f3a2
- https://git.kernel.org/stable/c/eef3e62f90d86c1c5651742f84ecc9db1814a893
- https://git.kernel.org/stable/c/f81a2da137b029a282b9bc64d2f267d242948659
- https://git.kernel.org/stable/c/6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9
- https://git.kernel.org/stable/c/d90b0f90e30cd59b36005a4016b15cf02bcd7fb2
- https://git.kernel.org/stable/c/9dbf74f4022f80f7669d2b3c22c5deb46c1b5674