Description
In the Linux kernel, the following vulnerability has been resolved: net: sched: act_ife: initialize struct tc_ife to fix KMSAN kernel-infoleak Fix a KMSAN kernel-infoleak detected by the syzbot . [net?] KMSAN: kernel-infoleak in __skb_datagram_iter In tcf_ife_dump(), the variable 'opt' was partially initialized using a designatied initializer. While the padding bytes are reamined uninitialized. nla_put() copies the entire structure into a netlink message, these uninitialized bytes leaked to userspace. Initialize the structure with memset before assigning its fields to ensure all members and padding are cleared prior to beign copied. This change silences the KMSAN report and prevents potential information leaks from the kernel memory. This fix has been tested and validated by syzbot. This patch closes the bug reported at the following syzkaller link and ensures no infoleak.
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
ef6980b6becb1afd9d82a4f043749a10ae81bf14 to < 918e063304f945fb93be9bb70cacea07d0b730eaaffectedef6980b6becb1afd9d82a4f043749a10ae81bf14 to < 5e3644ef147bf7140259dfa4cace680c9b26fe8baffectedef6980b6becb1afd9d82a4f043749a10ae81bf14 to < 37f0680887c5aeba9a433fe04b35169010568bb1affectedef6980b6becb1afd9d82a4f043749a10ae81bf14 to < 2191662058443e0bcc28d11694293d8339af6ddeaffectedef6980b6becb1afd9d82a4f043749a10ae81bf14 to < a676a296af65d33725bdf7396803180957dbd92eaffectedef6980b6becb1afd9d82a4f043749a10ae81bf14 to < d1dbbbe839647486c9b893e5011fe84a052962dfaffectedef6980b6becb1afd9d82a4f043749a10ae81bf14 to < c8f51dad94cbb88054e2aacc272b3ce1ed11fb1eaffectedef6980b6becb1afd9d82a4f043749a10ae81bf14 to < ce50039be49eea9b4cd8873ca6eccded1b4a130aaffected
Linux Linux
Default version status: affected
4.6affected0 to < 4.6unaffected5.4.302 to ≤ 5.4.*unaffected5.10.247 to ≤ 5.10.*unaffected5.15.197 to ≤ 5.15.*unaffected6.1.159 to ≤ 6.1.*unaffected6.6.117 to ≤ 6.6.*unaffected6.12.59 to ≤ 6.12.*unaffected6.17.9 to ≤ 6.17.*unaffected6.18 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/918e063304f945fb93be9bb70cacea07d0b730ea ↗
- https://git.kernel.org/stable/c/5e3644ef147bf7140259dfa4cace680c9b26fe8b ↗
- https://git.kernel.org/stable/c/37f0680887c5aeba9a433fe04b35169010568bb1 ↗
- https://git.kernel.org/stable/c/2191662058443e0bcc28d11694293d8339af6dde ↗
- https://git.kernel.org/stable/c/a676a296af65d33725bdf7396803180957dbd92e ↗
- https://git.kernel.org/stable/c/d1dbbbe839647486c9b893e5011fe84a052962df ↗
- https://git.kernel.org/stable/c/c8f51dad94cbb88054e2aacc272b3ce1ed11fb1e ↗
- https://git.kernel.org/stable/c/ce50039be49eea9b4cd8873ca6eccded1b4a130a ↗
- https://cert-portal.siemens.com/productcert/html/ssa-253495.html ↗