CVE-2024-57939: riscv: Fix sleeping in invalid context in die()
First published: Tue Jan 21 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: riscv: Fix sleeping in invalid context in die() die() can be called in exception handler, and therefore cannot sleep. However, die() takes spinlock_t which can sleep with PREEMPT_RT enabled. That causes the following warning: BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48 in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 285, name: mutex preempt_count: 110001, expected: 0 RCU nest depth: 0, expected: 0 CPU: 0 UID: 0 PID: 285 Comm: mutex Not tainted 6.12.0-rc7-00022-ge19049cf7d56-dirty #234 Hardware name: riscv-virtio,qemu (DT) Call Trace: dump_backtrace+0x1c/0x24 show_stack+0x2c/0x38 dump_stack_lvl+0x5a/0x72 dump_stack+0x14/0x1c __might_resched+0x130/0x13a rt_spin_lock+0x2a/0x5c die+0x24/0x112 do_trap_insn_illegal+0xa0/0xea _new_vmalloc_restore_context_a0+0xcc/0xd8 Oops - illegal instruction [#1] Switch to use raw_spinlock_t, which does not sleep even with PREEMPT_RT enabled.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| Linux Kernel | >=4.15<5.10.234 | |
| Linux Kernel | >=5.11<=5.15.177 | |
| Linux Kernel | >=5.16<=6.1.125 | |
| Linux Kernel | >=6.2<=6.6.72 | |
| Linux Kernel | >=6.7<=6.12.10 | |
| Linux Kernel | =6.13-rc1 | |
| Linux Kernel | =6.13-rc2 | |
| Linux Kernel | =6.13-rc3 | |
| Linux Kernel | =6.13-rc4 | |
| Linux Kernel | =6.13-rc5 | |
| Linux Kernel | =6.13-rc6 | |
| debian/linux | <=5.10.223-1<=5.10.234-1 | 6.1.129-1 6.1.128-1 6.12.20-1 6.12.21-1 |
| debian/linux-6.1 | 6.1.129-1~deb11u1 |
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Reference Links
- https://git.kernel.org/stable/c/8c38baa03ac8e18140faf36a3b955d30cad48e74
- https://git.kernel.org/stable/c/10c24df2e303f517fab0359392c11b6b1d553f2b
- https://git.kernel.org/stable/c/c21df31fc2a4afc02a6e56511364e9e793ea92ec
- https://git.kernel.org/stable/c/f48f060a4b36b5e96628f6c3fb1540f1e8dedb69
- https://git.kernel.org/stable/c/76ab0afcdbe8c9685b589016ee1c0e25fe596707
- https://git.kernel.org/stable/c/6a97f4118ac07cfdc316433f385dbdc12af5025e
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-57939
- https://nvd.nist.gov/vuln/detail/CVE-2024-57939
- https://launchpad.net/bugs/cve/CVE-2024-57939
- https://security-tracker.debian.org/tracker/CVE-2024-57939
- https://ubuntu.com/security/CVE-2024-57939
- https://git.kernel.org/linus/6a97f4118ac07cfdc316433f385dbdc12af5025e
Frequently Asked Questions
What is the severity of CVE-2024-57939?
CVE-2024-57939 has been classified as a medium severity vulnerability.
How do I fix CVE-2024-57939?
To fix CVE-2024-57939, ensure that you are using the latest patched version of the Linux kernel.
What systems are affected by CVE-2024-57939?
CVE-2024-57939 affects systems running the Linux kernel with PREEMPT_RT enabled.
What is the impact of CVE-2024-57939?
The impact of CVE-2024-57939 includes potential system instability due to sleeping in an invalid context.
Is CVE-2024-57939 related to kernel panic?
Yes, CVE-2024-57939 may cause kernel panic under certain conditions due to improper handling in the exception context.
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