{"id":"DEBIAN-CVE-2023-53859","details":"In the Linux kernel, the following vulnerability has been resolved:  s390/idle: mark arch_cpu_idle() noinstr  linux-next commit (\"cpuidle: tracing: Warn about !rcu_is_watching()\") adds a new warning which hits on s390's arch_cpu_idle() function:  RCU not on for: arch_cpu_idle+0x0/0x28 WARNING: CPU: 2 PID: 0 at include/linux/trace_recursion.h:162 arch_ftrace_ops_list_func+0x24c/0x258 Modules linked in: CPU: 2 PID: 0 Comm: swapper/2 Not tainted 6.2.0-rc6-next-20230202 #4 Hardware name: IBM 8561 T01 703 (z/VM 7.3.0) Krnl PSW : 0404d00180000000 00000000002b55c0 (arch_ftrace_ops_list_func+0x250/0x258)            R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:1 PM:0 RI:0 EA:3 Krnl GPRS: c0000000ffffbfff 0000000080000002 0000000000000026 0000000000000000            0000037ffffe3a28 0000037ffffe3a20 0000000000000000 0000000000000000            0000000000000000 0000000000f4acf6 00000000001044f0 0000037ffffe3cb0            0000000000000000 0000000000000000 00000000002b55bc 0000037ffffe3bb8 Krnl Code: 00000000002b55b0: c02000840051        larl    %r2,0000000001335652            00000000002b55b6: c0e5fff512d1        brasl   %r14,0000000000157b58           #00000000002b55bc: af000000            mc      0,0           \u003e00000000002b55c0: a7f4ffe7            brc     15,00000000002b558e            00000000002b55c4: 0707                bcr     0,%r7            00000000002b55c6: 0707                bcr     0,%r7            00000000002b55c8: eb6ff0480024        stmg    %r6,%r15,72(%r15)            00000000002b55ce: b90400ef            lgr     %r14,%r15 Call Trace:  [\u003c00000000002b55c0\u003e] arch_ftrace_ops_list_func+0x250/0x258 ([\u003c00000000002b55bc\u003e] arch_ftrace_ops_list_func+0x24c/0x258)  [\u003c0000000000f5f0fc\u003e] ftrace_common+0x1c/0x20  [\u003c00000000001044f6\u003e] arch_cpu_idle+0x6/0x28  [\u003c0000000000f4acf6\u003e] default_idle_call+0x76/0x128  [\u003c00000000001cc374\u003e] do_idle+0xf4/0x1b0  [\u003c00000000001cc6ce\u003e] cpu_startup_entry+0x36/0x40  [\u003c0000000000119d00\u003e] smp_start_secondary+0x140/0x150  [\u003c0000000000f5d2ae\u003e] restart_int_handler+0x6e/0x90  Mark arch_cpu_idle() noinstr like all other architectures with CONFIG_ARCH_WANTS_NO_INSTR (should) have it to fix this.","modified":"2026-09-15T08:47:53.037387371Z","published":"2025-12-09T16:17:26.630Z","upstream":["CVE-2023-53859"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-53859"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.20-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53859.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.20-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53859.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.20-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53859.json"}}],"schema_version":"1.9.0"}