CVE-2022-50210

MIPS: cpuinfo: Fix a warning for CONFIG_CPUMASK_OFFSTACK

State: Published
Severity: Not scored
Published: Jun 18, 2025
Updated: May 11, 2026
Reserved: Jun 18, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

MIPS: cpuinfo: Fix a warning for CONFIG_CPUMASK_OFFSTACK

When CONFIG_CPUMASK_OFFSTACK and CONFIG_DEBUG_PER_CPU_MAPS is selected, cpu_max_bits_warn() generates a runtime warning similar as below while we show /proc/cpuinfo. Fix this by using nr_cpu_ids (the runtime limit) instead of NR_CPUS to iterate CPUs.

[ 3.052463] ------------[ cut here ]------------ [ 3.059679] WARNING: CPU: 3 PID: 1 at include/linux/cpumask.h:108 show_cpuinfo+0x5e8/0x5f0 [ 3.070072] Modules linked in: efivarfs autofs4 [ 3.076257] CPU: 0 PID: 1 Comm: systemd Not tainted 5.19-rc5+ #1052 [ 3.084034] Hardware name: Loongson Loongson-3A4000-7A1000-1w-V0.1-CRB/Loongson-LS3A4000-7A1000-1w-EVB-V1.21, BIOS Loongson-UDK2018-V2.0.04082-beta7 04/27 [ 3.099465] Stack : 9000000100157b08 9000000000f18530 9000000000cf846c 9000000100154000 [ 3.109127] 9000000100157a50 0000000000000000 9000000100157a58 9000000000ef7430 [ 3.118774] 90000001001578e8 0000000000000040 0000000000000020 ffffffffffffffff [ 3.128412] 0000000000aaaaaa 1ab25f00eec96a37 900000010021de80 900000000101c890 [ 3.138056] 0000000000000000 0000000000000000 0000000000000000 0000000000aaaaaa [ 3.147711] ffff8000339dc220 0000000000000001 0000000006ab4000 0000000000000000 [ 3.157364] 900000000101c998 0000000000000004 9000000000ef7430 0000000000000000 [ 3.167012] 0000000000000009 000000000000006c 0000000000000000 0000000000000000 [ 3.176641] 9000000000d3de08 9000000001639390 90000000002086d8 00007ffff0080286 [ 3.186260] 00000000000000b0 0000000000000004 0000000000000000 0000000000071c1c [ 3.195868] ... [ 3.199917] Call Trace: [ 3.203941] [<98000000002086d8>] show_stack+0x38/0x14c [ 3.210666] [<9800000000cf846c>] dump_stack_lvl+0x60/0x88 [ 3.217625] [<980000000023d268>] __warn+0xd0/0x100 [ 3.223958] [<9800000000cf3c90>] warn_slowpath_fmt+0x7c/0xcc [ 3.231150] [<9800000000210220>] show_cpuinfo+0x5e8/0x5f0 [ 3.238080] [<98000000004f578c>] seq_read_iter+0x354/0x4b4 [ 3.245098] [<98000000004c2e90>] new_sync_read+0x17c/0x1c4 [ 3.252114] [<98000000004c5174>] vfs_read+0x138/0x1d0 [ 3.258694] [<98000000004c55f8>] ksys_read+0x70/0x100 [ 3.265265] [<9800000000cfde9c>] do_syscall+0x7c/0x94 [ 3.271820] [<9800000000202fe4>] handle_syscall+0xc4/0x160 [ 3.281824] ---[ end trace 8b484262b4b8c24c ]---

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 to before d3ac4e47510ec0753ebe1e418a334ad202784aa8Affected ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 to before 98aaa511957667ba26d6dabe28dfa210a8f53a63Affected ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 to before 4cb392956ae392aec4aa06e661a0bb9146b0baceAffected ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 to before 274e44e2123417e0924c90d4b4531913b5f3aa2eAffected ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 to before 807adf6ffa8c3beedcd63b20f5a59c7d061df7d2Affected ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 to before e41db8a9ce696a3382a4f098878fd4d14bccd201Affected ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 to before 8916ec149c79cb21f5454fa7840ad96f99cf51cfAffected ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 to before 7d305823e02217b29d41fca67e3cef87fd7bd688Affected ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 to before e1a534f5d074db45ae5cbac41d8912b98e96a006Affected
LinuxLinux	2.6.29Affected before 2.6.29Not affected 4.9.326 through 4.9.Not affected 4.14.291 through 4.14.Not affected 4.19.256 through 4.19.Not affected 5.4.211 through 5.4.Not affected 5.10.137 through 5.10.Not affected 5.15.61 through 5.15.Not affected 5.18.18 through 5.18.Not affected 5.19.2 through 5.19.Not affected 6.0 and laterNot affected

Product

Versions

LinuxLinux

ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 to before d3ac4e47510ec0753ebe1e418a334ad202784aa8Affected
ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 to before 98aaa511957667ba26d6dabe28dfa210a8f53a63Affected
ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 to before 4cb392956ae392aec4aa06e661a0bb9146b0baceAffected
ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 to before 274e44e2123417e0924c90d4b4531913b5f3aa2eAffected
ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 to before 807adf6ffa8c3beedcd63b20f5a59c7d061df7d2Affected
ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 to before e41db8a9ce696a3382a4f098878fd4d14bccd201Affected
ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 to before 8916ec149c79cb21f5454fa7840ad96f99cf51cfAffected
ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 to before 7d305823e02217b29d41fca67e3cef87fd7bd688Affected
ae7a47e72e1a0b5e2b46d1596bc2c22942a73023 to before e1a534f5d074db45ae5cbac41d8912b98e96a006Affected

LinuxLinux

2.6.29Affected
before 2.6.29Not affected
4.9.326 through 4.9.*Not affected
4.14.291 through 4.14.*Not affected
4.19.256 through 4.19.*Not affected
5.4.211 through 5.4.*Not affected
5.10.137 through 5.10.*Not affected
5.15.61 through 5.15.*Not affected
5.18.18 through 5.18.*Not affected
5.19.2 through 5.19.*Not affected
6.0 and laterNot affected

References

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