Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show() In f2fs_sbi_show(), the extension_list, extension_count and hot_ext_count are read without holding sbi->sb_lock. If a concurrent sysfs store modifies the extension list via f2fs_update_extension_list(), the show path may read inconsistent count and array contents, potentially leading to out-of-bounds access or displaying stale data. Fix this by holding sb_lock around the entire extension list read and format operation.
Affected products
- Linux / Linuxb6a06cbbb5f7fd03589cff9178314af04c568826 – d3ff0c121bbaef026df6248ab7ef6f0b068b0647
- Linux / Linuxb6a06cbbb5f7fd03589cff9178314af04c568826 – cea15f66b7b68b2c50943a6660e0692c6635e4eb
- Linux / Linuxb6a06cbbb5f7fd03589cff9178314af04c568826 – 4b3a1bf4c2ffd4c9595d900ead78c9035894a025
- Linux / Linuxb6a06cbbb5f7fd03589cff9178314af04c568826 – d0e877810baf613b018fd9747440b9d4d9db1428
- Linux / Linuxb6a06cbbb5f7fd03589cff9178314af04c568826 – ea3ab43a1f3cf2c7cecd75c8be1ee99a5e94a92e
- Linux / Linuxb6a06cbbb5f7fd03589cff9178314af04c568826 – 5909bedbed38c558bee7cb6758ceedf9bc3a9194
- Linux / Linux4.17 – 4.17
- Linux / Linux0 – 4.17
- Linux / Linux6.1.175 – 6.1.*
- Linux / Linux6.6.141 – 6.6.*
- Linux / Linux6.12.91 – 6.12.*
- Linux / Linux6.18.33 – 6.18.*
- Linux / Linux7.0.10 – 7.0.*
- Linux / Linux7.1 – *
References
- MISChttps://git.kernel.org/stable/c/d3ff0c121bbaef026df6248ab7ef6f0b068b0647
- MISChttps://git.kernel.org/stable/c/cea15f66b7b68b2c50943a6660e0692c6635e4eb
- MISChttps://git.kernel.org/stable/c/4b3a1bf4c2ffd4c9595d900ead78c9035894a025
- MISChttps://git.kernel.org/stable/c/d0e877810baf613b018fd9747440b9d4d9db1428
- MISChttps://git.kernel.org/stable/c/ea3ab43a1f3cf2c7cecd75c8be1ee99a5e94a92e
- MISChttps://git.kernel.org/stable/c/5909bedbed38c558bee7cb6758ceedf9bc3a9194