Description
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix use-after-free bug of nilfs_root in nilfs_evict_inode() During unmount process of nilfs2, nothing holds nilfs_root structure after nilfs2 detaches its writer in nilfs_detach_log_writer(). However, since nilfs_evict_inode() uses nilfs_root for some cleanup operations, it may cause use-after-free read if inodes are left in "garbage_list" and released by nilfs_dispose_list() at the end of nilfs_detach_log_writer(). Fix this issue by modifying nilfs_evict_inode() to only clear inode without additional metadata changes that use nilfs_root if the file system is degraded to read-only or the writer is detached.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
e912a5b66837ee89fb025e67b5efeaa11930c2ce to < f31e18131ee2ce80a4da5c808221d25b1ae9ad6daffectede912a5b66837ee89fb025e67b5efeaa11930c2ce to < 2a782ea8ebd712a458466e3103e2881b4f886cb5affectede912a5b66837ee89fb025e67b5efeaa11930c2ce to < 116d53f09ff52e6f98e3fe1f85d8898d6ba26c68affectede912a5b66837ee89fb025e67b5efeaa11930c2ce to < 6b4205ea97901f822004e6c8d59484ccfda03faaaffectede912a5b66837ee89fb025e67b5efeaa11930c2ce to < b8427b8522d9ede53015ba45a9978ba68d1162f5affectede912a5b66837ee89fb025e67b5efeaa11930c2ce to < acc2a40e428f12780004e1e9fce4722d88f909fdaffectede912a5b66837ee89fb025e67b5efeaa11930c2ce to < fb8e8d58f116d069e5939e1f786ac84e7fa4533eaffectede912a5b66837ee89fb025e67b5efeaa11930c2ce to < 9b5a04ac3ad9898c4745cba46ea26de74ba56a8eaffected
Linux Linux
Default version status: affected
2.6.37affected0 to < 2.6.37unaffected4.14.316 to ≤ 4.14.*unaffected4.19.284 to ≤ 4.19.*unaffected5.4.244 to ≤ 5.4.*unaffected5.10.181 to ≤ 5.10.*unaffected5.15.113 to ≤ 5.15.*unaffected6.1.30 to ≤ 6.1.*unaffected6.3.4 to ≤ 6.3.*unaffected6.4 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/f31e18131ee2ce80a4da5c808221d25b1ae9ad6d ↗
- https://git.kernel.org/stable/c/2a782ea8ebd712a458466e3103e2881b4f886cb5 ↗
- https://git.kernel.org/stable/c/116d53f09ff52e6f98e3fe1f85d8898d6ba26c68 ↗
- https://git.kernel.org/stable/c/6b4205ea97901f822004e6c8d59484ccfda03faa ↗
- https://git.kernel.org/stable/c/b8427b8522d9ede53015ba45a9978ba68d1162f5 ↗
- https://git.kernel.org/stable/c/acc2a40e428f12780004e1e9fce4722d88f909fd ↗
- https://git.kernel.org/stable/c/fb8e8d58f116d069e5939e1f786ac84e7fa4533e ↗
- https://git.kernel.org/stable/c/9b5a04ac3ad9898c4745cba46ea26de74ba56a8e ↗