CVE-2022-50296

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> UM: cpuinfo: Fix a warning for CONFIG_CPUMASK_OFFSTACK<br /> <br /> When CONFIG_CPUMASK_OFFSTACK and CONFIG_DEBUG_PER_CPU_MAPS is selected,<br /> cpu_max_bits_warn() generates a runtime warning similar as below while<br /> we show /proc/cpuinfo. Fix this by using nr_cpu_ids (the runtime limit)<br /> instead of NR_CPUS to iterate CPUs.<br /> <br /> [ 3.052463] ------------[ cut here ]------------<br /> [ 3.059679] WARNING: CPU: 3 PID: 1 at include/linux/cpumask.h:108 show_cpuinfo+0x5e8/0x5f0<br /> [ 3.070072] Modules linked in: efivarfs autofs4<br /> [ 3.076257] CPU: 0 PID: 1 Comm: systemd Not tainted 5.19-rc5+ #1052<br /> [ 3.099465] Stack : 9000000100157b08 9000000000f18530 9000000000cf846c 9000000100154000<br /> [ 3.109127] 9000000100157a50 0000000000000000 9000000100157a58 9000000000ef7430<br /> [ 3.118774] 90000001001578e8 0000000000000040 0000000000000020 ffffffffffffffff<br /> [ 3.128412] 0000000000aaaaaa 1ab25f00eec96a37 900000010021de80 900000000101c890<br /> [ 3.138056] 0000000000000000 0000000000000000 0000000000000000 0000000000aaaaaa<br /> [ 3.147711] ffff8000339dc220 0000000000000001 0000000006ab4000 0000000000000000<br /> [ 3.157364] 900000000101c998 0000000000000004 9000000000ef7430 0000000000000000<br /> [ 3.167012] 0000000000000009 000000000000006c 0000000000000000 0000000000000000<br /> [ 3.176641] 9000000000d3de08 9000000001639390 90000000002086d8 00007ffff0080286<br /> [ 3.186260] 00000000000000b0 0000000000000004 0000000000000000 0000000000071c1c<br /> [ 3.195868] ...<br /> [ 3.199917] Call Trace:<br /> [ 3.203941] [] show_stack+0x38/0x14c<br /> [ 3.210666] [] dump_stack_lvl+0x60/0x88<br /> [ 3.217625] [] __warn+0xd0/0x100<br /> [ 3.223958] [] warn_slowpath_fmt+0x7c/0xcc<br /> [ 3.231150] [] show_cpuinfo+0x5e8/0x5f0<br /> [ 3.238080] [] seq_read_iter+0x354/0x4b4<br /> [ 3.245098] [] new_sync_read+0x17c/0x1c4<br /> [ 3.252114] [] vfs_read+0x138/0x1d0<br /> [ 3.258694] [] ksys_read+0x70/0x100<br /> [ 3.265265] [] do_syscall+0x7c/0x94<br /> [ 3.271820] [] handle_syscall+0xc4/0x160<br /> [ 3.281824] ---[ end trace 8b484262b4b8c24c ]---