Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix KMSAN uninit-value in extent_info usage KMSAN reported a use of uninitialized value in `__is_extent_mergeable()` and `__is_back_mergeable()` via the read extent tree path. The root cause is that `get_read_extent_info()` only initializes three fields (`fofs`, `blk`, `len`) of `struct extent_info`, leaving the remaining fields uninitialized. This leads to undefined behavior when those fields are accessed later, especially during extent merging. Fix it by zero-initializing the `extent_info` struct before population.
Product status
94afd6d6e5253179c9b891d02081cc8355a11768 before 08e8ab00a6d20d5544c932ee85a297d833895141
94afd6d6e5253179c9b891d02081cc8355a11768 before e68b751ec2b15d866967812c57cfdfc1eba6a269
94afd6d6e5253179c9b891d02081cc8355a11768 before dabfa3952c8e6bfe6414dbf32e8b6c5f349dc898
94afd6d6e5253179c9b891d02081cc8355a11768 before 44a79437309e0ee2276ac17aaedc71253af253a8
94afd6d6e5253179c9b891d02081cc8355a11768 before cc1615d5aba4f396cf412579928539a2b124c8a0
94afd6d6e5253179c9b891d02081cc8355a11768 before 01b6f5955e0008af6bc3a181310d2744bb349800
94afd6d6e5253179c9b891d02081cc8355a11768 before 154467f4ad033473e5c903a03e7b9bca7df9a0fa
5.15
Any version before 5.15
5.15.190
6.1.148
6.6.102
6.12.42
6.15.10
6.16.1
6.17
References
git.kernel.org/...c/08e8ab00a6d20d5544c932ee85a297d833895141
git.kernel.org/...c/e68b751ec2b15d866967812c57cfdfc1eba6a269
git.kernel.org/...c/dabfa3952c8e6bfe6414dbf32e8b6c5f349dc898
git.kernel.org/...c/44a79437309e0ee2276ac17aaedc71253af253a8
git.kernel.org/...c/cc1615d5aba4f396cf412579928539a2b124c8a0
git.kernel.org/...c/01b6f5955e0008af6bc3a181310d2744bb349800
git.kernel.org/...c/154467f4ad033473e5c903a03e7b9bca7df9a0fa
