Ubuntu
linux package

  1. Bug #1926184
  2. Comment #0

Comment 0 for bug 1926184

Revision history for this message
Tim Gardner (timg-tpi) wrote :

SRU Justification

[Impact]

Out of order reads can fetch a NULL pointer causing a kernel crash. Affects kernels from v4.15 to v5.11.

[Fix]

commit 84a24bf8c52e66b7ac89ada5e3cfbe72d65c1896 ("locking/qrwlock: Fix ordering in queued_write_lock_slowpath()")

[Where problems could occur]

This is quite a subtle bug. It is more prevalent on arm64. Regression
possibility seems quite low. The worst impact could be a minor performance degradation.