CVE-2024-50111: LoongArch: Enable IRQ if do_ale() triggered in irq-enabled context
In the Linux kernel, the following vulnerability has been resolved:
LoongArch: Enable IRQ if doale() triggered in irq-enabled context
Unaligned access exception can be triggered in irq-enabled context such as user mode, in this case doale() may call getuser() which may cause sleep. Then we will get:
BUG: sleeping function called from invalid context at arch/loongarch/kernel/access-helper.h:7 inatomic(): 0, irqsdisabled(): 1, nonblock: 0, pid: 129, name: modprobe preemptcount: 0, expected: 0 RCU nest depth: 0, expected: 0 CPU: 0 UID: 0 PID: 129 Comm: modprobe Tainted: G W 6.12.0-rc1+ #1723 Tainted: [W]=WARN Stack : 9000000105e0bd48 0000000000000000 9000000003803944 9000000105e08000 9000000105e0bc70 9000000105e0bc78 0000000000000000 0000000000000000 9000000105e0bc78 0000000000000001 9000000185e0ba07 9000000105e0b890 ffffffffffffffff 9000000105e0bc78 73924b81763be05b 9000000100194500 000000000000020c 000000000000000a 0000000000000000 0000000000000003 00000000000023f0 00000000000e1401 00000000072f8000 0000007ffbb0e260 0000000000000000 0000000000000000 9000000005437650 90000000055d5000 0000000000000000 0000000000000003 0000007ffbb0e1f0 0000000000000000 0000005567b00490 0000000000000000 9000000003803964 0000007ffbb0dfec 00000000000000b0 0000000000000007 0000000000000003 0000000000071c1d ... Call Trace: [<9000000003803964>] showstack+0x64/0x1a0 [<9000000004c57464>] dumpstacklvl+0x74/0xb0 [<9000000003861ab4>] mightresched+0x154/0x1a0 [<900000000380c96c>] emulateloadstoreinsn+0x6c/0xf60 [<9000000004c58118>] doale+0x78/0x180 [<9000000003801bc8>] handleale+0x128/0x1e0
So enable IRQ if unaligned access exception is triggered in irq-enabled context to fix it.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2024-50111?
The severity of CVE-2024-50111 has been classified as moderate.
Which versions of the Linux Kernel are affected by CVE-2024-50111?
CVE-2024-50111 affects Linux Kernel versions between 6.7 and 6.11.6, as well as specific release candidates.
How do I fix CVE-2024-50111?
To address CVE-2024-50111, update to the latest version of the Linux Kernel containing the fix, such as 5.10.223-1, 6.12.12-1, or newer.
What type of vulnerability is CVE-2024-50111?
CVE-2024-50111 is an unaligned access exception that can occur in an IRQ-enabled context.
Is user mode execution affected by CVE-2024-50111?
Yes, CVE-2024-50111 can impact user mode execution, potentially leading to security vulnerabilities.