Description
In the Linux kernel, the following vulnerability has been resolved: netfs: Fix read abandonment during retry Under certain circumstances, all the remaining subrequests from a read request will get abandoned during retry. The abandonment process expects the 'subreq' variable to be set to the place to start abandonment from, but it doesn't always have a useful value (it will be uninitialised on the first pass through the loop and it may point to a deleted subrequest on later passes). Fix the first jump to "abandon:" to set subreq to the start of the first subrequest expected to need retry (which, in this abandonment case, turned out unexpectedly to no longer have NEED_RETRY set). Also clear the subreq pointer after discarding superfluous retryable subrequests to cause an oops if we do try to access it.
Product status
ee4cdf7ba857a894ad1650d6ab77669cbbfa329e (git) before 3e5fd8f53b575ff2188f82071da19c977ca56c41
ee4cdf7ba857a894ad1650d6ab77669cbbfa329e (git) before 8f2f2bd128a8d9edbc1e785760da54ada3df69b7
ee4cdf7ba857a894ad1650d6ab77669cbbfa329e (git) before 7e57523490cd2efb52b1ea97f2e0a74c0fb634cd
6.12
Any version before 6.12
6.18.21 (semver)
6.19.11 (semver)
7.0 (original_commit_for_fix)
References
git.kernel.org/...c/3e5fd8f53b575ff2188f82071da19c977ca56c41
git.kernel.org/...c/8f2f2bd128a8d9edbc1e785760da54ada3df69b7
git.kernel.org/...c/7e57523490cd2efb52b1ea97f2e0a74c0fb634cd