CVE-2025-68168

Summary

In the Linux kernel, the following vulnerability has been resolved:

jfs: fix uninitialized waitqueue in transaction manager

The transaction manager initialization in txInit() was not properly initializing TxBlock[0].waitor waitqueue, causing a crash when txEnd(0) is called on read-only filesystems.

When a filesystem is mounted read-only, txBegin() returns tid=0 to indicate no transaction. However, txEnd(0) still gets called and tries to access TxBlock[0].waitor via tid_to_tblock(0), but this waitqueue was never initialized because the initialization loop started at index 1 instead of 0.

This causes a 'non-static key' lockdep warning and system crash: INFO: trying to register non-static key in txEnd

Fix by ensuring all transaction blocks including TxBlock[0] have their waitqueues properly initialized during txInit().

Affected Software

VendorProductVersion RangeStatus
LinuxLinux2a8807f9f511c64de0c7cc9900a1683e3d72a3e5 < d6af7fce2e162ac68e85d3a11eb6ac8c35b24b64affected
LinuxLinux5c094ca994824e038b6a97835ded4e5d1d808504 < 8cae9cf23e0bd424ac904e753639a587543ce03aaffected
LinuxLinux2febd5f81e4bfba61d9f374dcca628aff374cc56 < a2aa97cde9857f881920635a2e3d3b11769619c5affected
LinuxLinuxaa7cdf487ab3fa47284daaccc3d7d5de01c6a84c < d2dd7ca05a11685c314e62802a55e8d67a90e974affected
LinuxLinux95e2b352c03b0a86c5717ba1d24ea20969abcacc < 2a9575a372182ca075070b3cd77490dcf0c951e7affected
LinuxLinux95e2b352c03b0a86c5717ba1d24ea20969abcacc < cbf2f527ae4ca7c7dabce42e85e8deb58588a37eaffected
LinuxLinux95e2b352c03b0a86c5717ba1d24ea20969abcacc < 038861414ab383b41dd35abbf9ff0ef715592d53affected
LinuxLinux95e2b352c03b0a86c5717ba1d24ea20969abcacc < 300b072df72694ea330c4c673c035253e07827b8affected
LinuxLinuxa88efca805bea93cea9187dfd00835aa7093bf1baffected
LinuxLinux97c1f26e4d4af55e8584e4646dd5c5fa7baf62c7affected
LinuxLinuxb0ed8ed0428ee96092da6fefa5cfacbe4abed701affected
LinuxLinux5.4.255 < 5.4.302affected
LinuxLinux5.10.192 < 5.10.247affected
LinuxLinux5.15.123 < 5.15.197affected
LinuxLinux6.1.42 < 6.1.159affected
LinuxLinux4.14.324 < 4.15affected
LinuxLinux4.19.293 < 4.20affected
LinuxLinux6.4.7 < 6.5affected
LinuxLinux6.5affected
LinuxLinux0 < 6.5unaffected
LinuxLinux5.4.302 <= 5.4.*unaffected
LinuxLinux5.10.247 <= 5.10.*unaffected
LinuxLinux5.15.197 <= 5.15.*unaffected
LinuxLinux6.1.159 <= 6.1.*unaffected
LinuxLinux6.6.117 <= 6.6.*unaffected
LinuxLinux6.12.58 <= 6.12.*unaffected
LinuxLinux6.17.8 <= 6.17.*unaffected
LinuxLinux6.18 <= *unaffected

Weaknesses

References