Description
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.
Product status
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before f413135b337c4e90c1e593c6613f8717e17bc724
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 4768935b8cc2d2afeb7956292df0f6e2c49ca0a5
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before ffa991a003abb4f8cb9e5004646bfe2d9a46912c
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 515959eb49e6d218a46979d66f36fdef329ac7d2
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 6f7e2fcab73372a371ab4017cbedf7a71f4f9b40
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 7280fdb80bf0fe35d9b799fc7009f2cbe0a397d7
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before bed48651c87bef59ea1a9d6dbc381bcbc452f4ff
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 482d990a5dd1027ee0b70a8a570d56749cac8103
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 6c606e57eecc37d6b36d732b1ff7e55b7dc32dd4
4.9.337
4.14.303
4.19.270
5.4.229
5.10.163
5.15.87
6.0.17
6.1.3
6.2
References
git.kernel.org/...c/f413135b337c4e90c1e593c6613f8717e17bc724
git.kernel.org/...c/4768935b8cc2d2afeb7956292df0f6e2c49ca0a5
git.kernel.org/...c/ffa991a003abb4f8cb9e5004646bfe2d9a46912c
git.kernel.org/...c/515959eb49e6d218a46979d66f36fdef329ac7d2
git.kernel.org/...c/6f7e2fcab73372a371ab4017cbedf7a71f4f9b40
git.kernel.org/...c/7280fdb80bf0fe35d9b799fc7009f2cbe0a397d7
git.kernel.org/...c/bed48651c87bef59ea1a9d6dbc381bcbc452f4ff
git.kernel.org/...c/482d990a5dd1027ee0b70a8a570d56749cac8103
git.kernel.org/...c/6c606e57eecc37d6b36d732b1ff7e55b7dc32dd4
