CVE-2022-50504None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: powerpc/rtas: avoid scheduling in rtas_os_term() It's unsafe to use rtas_busy_delay() to handle a busy status from the ibm,os-term RTAS function in rtas_os_term(): Ke…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
In the Linux kernel, the following vulnerability has been resolved:
powerpc/rtas: avoid scheduling in rtas_os_term()
It's unsafe to use rtas_busy_delay() to handle a busy status from the ibm,os-term RTAS function in rtas_os_term():
Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b BUG: sleeping function called from invalid context at arch/powerpc/kernel/rtas.c:618 in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 1, name: swapper/0 preempt_count: 2, expected: 0 CPU: 7 PID: 1 Comm: swapper/0 Tainted: G D 6.0.0-rc5-02182-gf8553a572277-dirty #9 Call Trace: [c000000007b8f000] [c000000001337110] dump_stack_lvl+0xb4/0x110 (unreliable) [c000000007b8f040] [c0000000002440e4] __might_resched+0x394/0x3c0 [c000000007b8f0e0] [c00000000004f680] rtas_busy_delay+0x120/0x1b0 [c000000007b8f100] [c000000000052d04] rtas_os_term+0xb8/0xf4 [c000000007b8f180] [c0000000001150fc] pseries_panic+0x50/0x68 [c000000007b8f1f0] [c000000000036354] ppc_panic_platform_handler+0x34/0x50 [c000000007b8f210] [c0000000002303c4] notifier_call_chain+0xd4/0x1c0 [c000000007b8f2b0] [c0000000002306cc] atomic_notifier_call_chain+0xac/0x1c0 [c000000007b8f2f0] [c0000000001d62b8] panic+0x228/0x4d0 [c000000007b8f390] [c0000000001e573c] do_exit+0x140c/0x1420 [c000000007b8f480] [c0000000001e586c] make_task_dead+0xdc/0x200
Use rtas_busy_delay_time() instead, which signals without side effects whether to attempt the ibm,os-term RTAS call again.
Linux >= 507279db1819aacf4022e790b3fc8bc8cf56debf < f413135b337c4e90c1e593c6613f8717e17bc724Linux >= 507279db1819aacf4022e790b3fc8bc8cf56debf < 4768935b8cc2d2afeb7956292df0f6e2c49ca0a5Linux >= 507279db1819aacf4022e790b3fc8bc8cf56debf < ffa991a003abb4f8cb9e5004646bfe2d9a46912cLinux >= 507279db1819aacf4022e790b3fc8bc8cf56debf < 515959eb49e6d218a46979d66f36fdef329ac7d2Linux >= 507279db1819aacf4022e790b3fc8bc8cf56debf < 6f7e2fcab73372a371ab4017cbedf7a71f4f9b40Linux >= 507279db1819aacf4022e790b3fc8bc8cf56debf < 7280fdb80bf0fe35d9b799fc7009f2cbe0a397d7Linux >= 507279db1819aacf4022e790b3fc8bc8cf56debf < bed48651c87bef59ea1a9d6dbc381bcbc452f4ffLinux >= 507279db1819aacf4022e790b3fc8bc8cf56debf < 482d990a5dd1027ee0b70a8a570d56749cac8103Linux >= 507279db1819aacf4022e790b3fc8bc8cf56debf < 6c606e57eecc37d6b36d732b1ff7e55b7dc32dd4Linux 2.6.18Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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