| 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-2024-57949: irqchip/gic-v3-its: Don't enable interrupts in its_irq_set_vcpu_affinity() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| irqchip/gic-v3-its: Don't enable interrupts in its_irq_set_vcpu_affinity() |
| |
| The following call-chain leads to enabling interrupts in a nested interrupt |
| disabled section: |
| |
| irq_set_vcpu_affinity() |
| irq_get_desc_lock() |
| raw_spin_lock_irqsave() <--- Disable interrupts |
| its_irq_set_vcpu_affinity() |
| guard(raw_spinlock_irq) <--- Enables interrupts when leaving the guard() |
| irq_put_desc_unlock() <--- Warns because interrupts are enabled |
| |
| This was broken in commit b97e8a2f7130, which replaced the original |
| raw_spin_[un]lock() pair with guard(raw_spinlock_irq). |
| |
| Fix the issue by using guard(raw_spinlock). |
| |
| [ tglx: Massaged change log ] |
| |
| The Linux kernel CVE team has assigned CVE-2024-57949 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.1.95 with commit 2458f2362f695584bd824c922caa07ffc4fe0d5c and fixed in 6.1.127 with commit d7b0e89610dd45ac6cf0d6f99bfa9ccc787db344 |
| Issue introduced in 6.6.35 with commit 5c0fb9cb404a2efbbc319ff9d1b877cf4e47e950 and fixed in 6.6.74 with commit 6c84ff2e788fce0099ee3e71a3ed258b1ca1a223 |
| Issue introduced in 6.10 with commit b97e8a2f7130a4b30d1502003095833d16c028b3 and fixed in 6.12.11 with commit 93955a7788121ab5a0f7f27e988b2ed1135a4866 |
| Issue introduced in 6.10 with commit b97e8a2f7130a4b30d1502003095833d16c028b3 and fixed in 6.13 with commit 35cb2c6ce7da545f3b5cb1e6473ad7c3a6f08310 |
| Issue introduced in 6.9.6 with commit c11039edbabdbccf0728844f1002d750d06f9eff |
| |
| 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-2024-57949 |
| 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: |
| drivers/irqchip/irq-gic-v3-its.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/d7b0e89610dd45ac6cf0d6f99bfa9ccc787db344 |
| https://git.kernel.org/stable/c/6c84ff2e788fce0099ee3e71a3ed258b1ca1a223 |
| https://git.kernel.org/stable/c/93955a7788121ab5a0f7f27e988b2ed1135a4866 |
| https://git.kernel.org/stable/c/35cb2c6ce7da545f3b5cb1e6473ad7c3a6f08310 |
