CVE-2024-26841

In the Linux kernel, the following vulnerability has been resolved:
LoongArch: Update cpu_sibling_map when disabling nonboot CPUs Update
cpu_sibling_map when disabling nonboot CPUs by defining & calling
clear_cpu_sibling_map(), otherwise we get such errors on SMT systems: jump
label: negative count! WARNING: CPU: 6 PID: 45 at kernel/jump_label.c:263
__static_key_slow_dec_cpuslocked+0xec/0x100 CPU: 6 PID: 45 Comm: cpuhp/6
Not tainted 6.8.0-rc5+ #1340 pc 90000000004c302c ra 90000000004c302c tp
90000001005bc000 sp 90000001005bfd20 a0 000000000000001b a1
900000000224c278 a2 90000001005bfb58 a3 900000000224c280 a4
900000000224c278 a5 90000001005bfb50 a6 0000000000000001 a7
0000000000000001 t0 ce87a4763eb5234a t1 ce87a4763eb5234a t2
0000000000000000 t3 0000000000000000 t4 0000000000000006 t5
0000000000000000 t6 0000000000000064 t7 0000000000001964 t8
000000000009ebf6 u0 9000000001f2a068 s9 0000000000000000 s0
900000000246a2d8 s1 ffffffffffffffff s2 ffffffffffffffff s3
90000000021518c0 s4 0000000000000040 s5 9000000002151058 s6
9000000009828e40 s7 00000000000000b4 s8 0000000000000006 ra:
90000000004c302c __static_key_slow_dec_cpuslocked+0xec/0x100 ERA:
90000000004c302c __static_key_slow_dec_cpuslocked+0xec/0x100 CRMD: 000000b0
(PLV0 -IE -DA +PG DACF=CC DACM=CC -WE) PRMD: 00000004 (PPLV0 +PIE -PWE)
EUEN: 00000000 (-FPE -SXE -ASXE -BTE) ECFG: 00071c1c (LIE=2-4,10-12 VS=7)
ESTAT: 000c0000 [BRK] (IS= ECode=12 EsubCode=0) PRID: 0014d000
(Loongson-64bit, Loongson-3A6000-HV) CPU: 6 PID: 45 Comm: cpuhp/6 Not
tainted 6.8.0-rc5+ #1340 Stack : 0000000000000000 900000000203f258
900000000179afc8 90000001005bc000 90000001005bf980 0000000000000000
90000001005bf988 9000000001fe0be0 900000000224c280 900000000224c278
90000001005bf8c0 0000000000000001 0000000000000001 ce87a4763eb5234a
0000000007f38000 90000001003f8cc0 0000000000000000 0000000000000006
0000000000000000 4c206e6f73676e6f 6f4c203a656d616e 000000000009ec99
0000000007f38000 0000000000000000 900000000214b000 9000000001fe0be0
0000000000000004 0000000000000000 0000000000000107 0000000000000009
ffffffffffafdabe 00000000000000b4 0000000000000006 90000000004c302c
9000000000224528 00005555939a0c7c 00000000000000b0 0000000000000004
0000000000000000 0000000000071c1c … Call Trace: [<9000000000224528>]
show_stack+0x48/0x1a0 [<900000000179afc8>] dump_stack_lvl+0x78/0xa0
[<9000000000263ed0>] __warn+0x90/0x1a0 [<90000000017419b8>]
report_bug+0x1b8/0x280 [<900000000179c564>] do_bp+0x264/0x420
[<90000000004c302c>] __static_key_slow_dec_cpuslocked+0xec/0x100
[<90000000002b4d7c>] sched_cpu_deactivate+0x2fc/0x300 [<9000000000266498>]
cpuhp_invoke_callback+0x178/0x8a0 [<9000000000267f70>]
cpuhp_thread_fun+0xf0/0x240 [<90000000002a117c>]
smpboot_thread_fn+0x1dc/0x2e0 [<900000000029a720>] kthread+0x140/0x160
[<9000000000222288>] ret_from_kernel_thread+0xc/0xa4

Notes