Description
In the Linux kernel, the following vulnerability has been resolved: nfs: Fix KMSAN warning in decode_getfattr_attrs() Fix the following KMSAN warning: CPU: 1 UID: 0 PID: 7651 Comm: cp Tainted: G B Tainted: [B]=BAD_PAGE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009) ===================================================== ===================================================== BUG: KMSAN: uninit-value in decode_getfattr_attrs+0x2d6d/0x2f90 decode_getfattr_attrs+0x2d6d/0x2f90 decode_getfattr_generic+0x806/0xb00 nfs4_xdr_dec_getattr+0x1de/0x240 rpcauth_unwrap_resp_decode+0xab/0x100 rpcauth_unwrap_resp+0x95/0xc0 call_decode+0x4ff/0xb50 __rpc_execute+0x57b/0x19d0 rpc_execute+0x368/0x5e0 rpc_run_task+0xcfe/0xee0 nfs4_proc_getattr+0x5b5/0x990 __nfs_revalidate_inode+0x477/0xd00 nfs_access_get_cached+0x1021/0x1cc0 nfs_do_access+0x9f/0xae0 nfs_permission+0x1e4/0x8c0 inode_permission+0x356/0x6c0 link_path_walk+0x958/0x1330 path_lookupat+0xce/0x6b0 filename_lookup+0x23e/0x770 vfs_statx+0xe7/0x970 vfs_fstatat+0x1f2/0x2c0 __se_sys_newfstatat+0x67/0x880 __x64_sys_newfstatat+0xbd/0x120 x64_sys_call+0x1826/0x3cf0 do_syscall_64+0xd0/0x1b0 entry_SYSCALL_64_after_hwframe+0x77/0x7f The KMSAN warning is triggered in decode_getfattr_attrs(), when calling decode_attr_mdsthreshold(). It appears that fattr->mdsthreshold is not initialized. Fix the issue by initializing fattr->mdsthreshold to NULL in nfs_fattr_init().
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
88034c3d88c2c48b215f2cc5eb22e564aa817f9c to < 25ffd294fef81a7f3cd9528adf21560c04d98747affected88034c3d88c2c48b215f2cc5eb22e564aa817f9c to < bbfcd261cc068fe1cd02a4e871275074a0daa4e2affected88034c3d88c2c48b215f2cc5eb22e564aa817f9c to < 8fc5ea9231af9122d227c9c13f5e578fca48d2e3affected88034c3d88c2c48b215f2cc5eb22e564aa817f9c to < 9b453e8b108a5a93a6e348cf2ba4c9c138314a00affected88034c3d88c2c48b215f2cc5eb22e564aa817f9c to < f6b2b2b981af8e7d7c62d34143acefa4e1edfe8baffected88034c3d88c2c48b215f2cc5eb22e564aa817f9c to < f749cb60a01f8391c760a1d6ecd938cadacf9549affected88034c3d88c2c48b215f2cc5eb22e564aa817f9c to < 9be0a21ae52b3b822d0eec4d14e909ab394f8a92affected88034c3d88c2c48b215f2cc5eb22e564aa817f9c to < dc270d7159699ad6d11decadfce9633f0f71c1dbaffected
Linux Linux
Default version status: affected
3.5affected0 to < 3.5unaffected4.19.324 to ≤ 4.19.*unaffected5.4.286 to ≤ 5.4.*unaffected5.10.230 to ≤ 5.10.*unaffected5.15.172 to ≤ 5.15.*unaffected6.1.117 to ≤ 6.1.*unaffected6.6.61 to ≤ 6.6.*unaffected6.11.8 to ≤ 6.11.*unaffected6.12 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/25ffd294fef81a7f3cd9528adf21560c04d98747 ↗
- https://git.kernel.org/stable/c/bbfcd261cc068fe1cd02a4e871275074a0daa4e2 ↗
- https://git.kernel.org/stable/c/8fc5ea9231af9122d227c9c13f5e578fca48d2e3 ↗
- https://git.kernel.org/stable/c/9b453e8b108a5a93a6e348cf2ba4c9c138314a00 ↗
- https://git.kernel.org/stable/c/f6b2b2b981af8e7d7c62d34143acefa4e1edfe8b ↗
- https://git.kernel.org/stable/c/f749cb60a01f8391c760a1d6ecd938cadacf9549 ↗
- https://git.kernel.org/stable/c/9be0a21ae52b3b822d0eec4d14e909ab394f8a92 ↗
- https://git.kernel.org/stable/c/dc270d7159699ad6d11decadfce9633f0f71c1db ↗
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html ↗
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html ↗