CVE-2022-49034

sh: cpuinfo: Fix a warning for CONFIG_CPUMASK_OFFSTACK

State: Published
Severity: Not scored
Published: Dec 27, 2024
Updated: May 11, 2026
Reserved: Aug 22, 2024

Description

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

sh: cpuinfo: Fix a warning for CONFIG_CPUMASK_OFFSTACK

When CONFIG_CPUMASK_OFFSTACK and CONFIG_DEBUG_PER_CPU_MAPS are selected, cpu_max_bits_warn() generates a runtime warning similar as below when showing /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 [ 3.099465] 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] [<90000000002086d8>] show_stack+0x38/0x14c [ 3.210666] [<9000000000cf846c>] dump_stack_lvl+0x60/0x88 [ 3.217625] [<900000000023d268>] __warn+0xd0/0x100 [ 3.223958] [<9000000000cf3c90>] warn_slowpath_fmt+0x7c/0xcc [ 3.231150] [<9000000000210220>] show_cpuinfo+0x5e8/0x5f0 [ 3.238080] [<90000000004f578c>] seq_read_iter+0x354/0x4b4 [ 3.245098] [<90000000004c2e90>] new_sync_read+0x17c/0x1c4 [ 3.252114] [<90000000004c5174>] vfs_read+0x138/0x1d0 [ 3.258694] [<90000000004c55f8>] ksys_read+0x70/0x100 [ 3.265265] [<9000000000cfde9c>] do_syscall+0x7c/0x94 [ 3.271820] [<9000000000202fe4>] 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	1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 8fbb57eabfc8ae67115cb47f904614c99d626a89Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before f8f26cf69003a37ffa947631fc0e6fe6daee624aAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 77755dc95ff2f9a3e473acc1e039f498629949eaAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before e2b91997db286a5dd3cca6d5d9c20004851f22ebAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 2b6b8e011fab680a223b5e07a3c64774156ec6feAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 09faf32c682ea4a547200b8b9e04d8b3c8e84b55Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 39373f6f89f52770a5405d30dddd08a27d097872Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 701e32900683378d93693fec15d133e2c5f7ada2Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 3c891f7c6a4e90bb1199497552f24b26e46383bcAffected
LinuxLinux	2.6.12Affected before 2.6.12Not affected 4.19.325 through 4.19.Not affected 5.4.287 through 5.4.Not affected 5.10.231 through 5.10.Not affected 5.15.174 through 5.15.Not affected 6.1.120 through 6.1.Not affected 6.6.64 through 6.6.Not affected 6.11.11 through 6.11.Not affected 6.12.2 through 6.12.Not affected 6.13 and laterNot affected

Product

Versions

LinuxLinux

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 8fbb57eabfc8ae67115cb47f904614c99d626a89Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before f8f26cf69003a37ffa947631fc0e6fe6daee624aAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 77755dc95ff2f9a3e473acc1e039f498629949eaAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before e2b91997db286a5dd3cca6d5d9c20004851f22ebAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 2b6b8e011fab680a223b5e07a3c64774156ec6feAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 09faf32c682ea4a547200b8b9e04d8b3c8e84b55Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 39373f6f89f52770a5405d30dddd08a27d097872Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 701e32900683378d93693fec15d133e2c5f7ada2Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 3c891f7c6a4e90bb1199497552f24b26e46383bcAffected

LinuxLinux

2.6.12Affected
before 2.6.12Not affected
4.19.325 through 4.19.*Not affected
5.4.287 through 5.4.*Not affected
5.10.231 through 5.10.*Not affected
5.15.174 through 5.15.*Not affected
6.1.120 through 6.1.*Not affected
6.6.64 through 6.6.*Not affected
6.11.11 through 6.11.*Not affected
6.12.2 through 6.12.*Not affected
6.13 and laterNot affected

References

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