| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-26765: LoongArch: Disable IRQ before init_fn() for nonboot CPUs |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| LoongArch: Disable IRQ before init_fn() for nonboot CPUs |
| |
| Disable IRQ before init_fn() for nonboot CPUs when hotplug, in order to |
| silence such warnings (and also avoid potential errors due to unexpected |
| interrupts): |
| |
| WARNING: CPU: 1 PID: 0 at kernel/rcu/tree.c:4503 rcu_cpu_starting+0x214/0x280 |
| CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.6.17+ #1198 |
| pc 90000000048e3334 ra 90000000047bd56c tp 900000010039c000 sp 900000010039fdd0 |
| a0 0000000000000001 a1 0000000000000006 a2 900000000802c040 a3 0000000000000000 |
| a4 0000000000000001 a5 0000000000000004 a6 0000000000000000 a7 90000000048e3f4c |
| t0 0000000000000001 t1 9000000005c70968 t2 0000000004000000 t3 000000000005e56e |
| t4 00000000000002e4 t5 0000000000001000 t6 ffffffff80000000 t7 0000000000040000 |
| t8 9000000007931638 u0 0000000000000006 s9 0000000000000004 s0 0000000000000001 |
| s1 9000000006356ac0 s2 9000000007244000 s3 0000000000000001 s4 0000000000000001 |
| s5 900000000636f000 s6 7fffffffffffffff s7 9000000002123940 s8 9000000001ca55f8 |
| ra: 90000000047bd56c tlb_init+0x24c/0x528 |
| ERA: 90000000048e3334 rcu_cpu_starting+0x214/0x280 |
| CRMD: 000000b0 (PLV0 -IE -DA +PG DACF=CC DACM=CC -WE) |
| PRMD: 00000000 (PPLV0 -PIE -PWE) |
| EUEN: 00000000 (-FPE -SXE -ASXE -BTE) |
| ECFG: 00071000 (LIE=12 VS=7) |
| ESTAT: 000c0000 [BRK] (IS= ECode=12 EsubCode=0) |
| PRID: 0014c010 (Loongson-64bit, Loongson-3A5000) |
| CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.6.17+ #1198 |
| Stack : 0000000000000000 9000000006375000 9000000005b61878 900000010039c000 |
| 900000010039fa30 0000000000000000 900000010039fa38 900000000619a140 |
| 9000000006456888 9000000006456880 900000010039f950 0000000000000001 |
| 0000000000000001 cb0cb028ec7e52e1 0000000002b90000 9000000100348700 |
| 0000000000000000 0000000000000001 ffffffff916d12f1 0000000000000003 |
| 0000000000040000 9000000007930370 0000000002b90000 0000000000000004 |
| 9000000006366000 900000000619a140 0000000000000000 0000000000000004 |
| 0000000000000000 0000000000000009 ffffffffffc681f2 9000000002123940 |
| 9000000001ca55f8 9000000006366000 90000000047a4828 00007ffff057ded8 |
| 00000000000000b0 0000000000000000 0000000000000000 0000000000071000 |
| ... |
| Call Trace: |
| [<90000000047a4828>] show_stack+0x48/0x1a0 |
| [<9000000005b61874>] dump_stack_lvl+0x84/0xcc |
| [<90000000047f60ac>] __warn+0x8c/0x1e0 |
| [<9000000005b0ab34>] report_bug+0x1b4/0x280 |
| [<9000000005b63110>] do_bp+0x2d0/0x480 |
| [<90000000047a2e20>] handle_bp+0x120/0x1c0 |
| [<90000000048e3334>] rcu_cpu_starting+0x214/0x280 |
| [<90000000047bd568>] tlb_init+0x248/0x528 |
| [<90000000047a4c44>] per_cpu_trap_init+0x124/0x160 |
| [<90000000047a19f4>] cpu_probe+0x494/0xa00 |
| [<90000000047b551c>] start_secondary+0x3c/0xc0 |
| [<9000000005b66134>] smpboot_entry+0x50/0x58 |
| |
| The Linux kernel CVE team has assigned CVE-2024-26765 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.19 with commit fa96b57c149061f71a70bd6582d995f6424fbbf4 and fixed in 6.1.80 with commit a262b78dd085dbe9b3c75dc1d9c4cd102b110b53 |
| Issue introduced in 5.19 with commit fa96b57c149061f71a70bd6582d995f6424fbbf4 and fixed in 6.6.19 with commit dffdf7c783ef291eef38a5a0037584fd1a7fa464 |
| Issue introduced in 5.19 with commit fa96b57c149061f71a70bd6582d995f6424fbbf4 and fixed in 6.7.7 with commit 8bf2ca8c60712af288b88ba80f8e4df4573d923f |
| Issue introduced in 5.19 with commit fa96b57c149061f71a70bd6582d995f6424fbbf4 and fixed in 6.8 with commit 1001db6c42e4012b55e5ee19405490f23e033b5a |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2024-26765 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| arch/loongarch/kernel/smp.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/a262b78dd085dbe9b3c75dc1d9c4cd102b110b53 |
| https://git.kernel.org/stable/c/dffdf7c783ef291eef38a5a0037584fd1a7fa464 |
| https://git.kernel.org/stable/c/8bf2ca8c60712af288b88ba80f8e4df4573d923f |
| https://git.kernel.org/stable/c/1001db6c42e4012b55e5ee19405490f23e033b5a |
