{"id":"DEBIAN-CVE-2025-21733","details":"In the Linux kernel, the following vulnerability has been resolved:  tracing/osnoise: Fix resetting of tracepoints  If a timerlat tracer is started with the osnoise option OSNOISE_WORKLOAD disabled, but then that option is enabled and timerlat is removed, the tracepoints that were enabled on timerlat registration do not get disabled. If the option is disabled again and timelat is started, then it triggers a warning in the tracepoint code due to registering the tracepoint again without ever disabling it.  Do not use the same user space defined options to know to disable the tracepoints when timerlat is removed. Instead, set a global flag when it is enabled and use that flag to know to disable the events.   ~# echo NO_OSNOISE_WORKLOAD \u003e /sys/kernel/tracing/osnoise/options  ~# echo timerlat \u003e /sys/kernel/tracing/current_tracer  ~# echo OSNOISE_WORKLOAD \u003e /sys/kernel/tracing/osnoise/options  ~# echo nop \u003e /sys/kernel/tracing/current_tracer  ~# echo NO_OSNOISE_WORKLOAD \u003e /sys/kernel/tracing/osnoise/options  ~# echo timerlat \u003e /sys/kernel/tracing/current_tracer  Triggers:   ------------[ cut here ]------------  WARNING: CPU: 6 PID: 1337 at kernel/tracepoint.c:294 tracepoint_add_func+0x3b6/0x3f0  Modules linked in:  CPU: 6 UID: 0 PID: 1337 Comm: rtla Not tainted 6.13.0-rc4-test-00018-ga867c441128e-dirty #73  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014  RIP: 0010:tracepoint_add_func+0x3b6/0x3f0  Code: 48 8b 53 28 48 8b 73 20 4c 89 04 24 e8 23 59 11 00 4c 8b 04 24 e9 36 fe ff ff 0f 0b b8 ea ff ff ff 45 84 e4 0f 84 68 fe ff ff \u003c0f\u003e 0b e9 61 fe ff ff 48 8b 7b 18 48 85 ff 0f 84 4f ff ff ff 49 8b  RSP: 0018:ffffb9b003a87ca0 EFLAGS: 00010202  RAX: 00000000ffffffef RBX: ffffffff92f30860 RCX: 0000000000000000  RDX: 0000000000000000 RSI: ffff9bf59e91ccd0 RDI: ffffffff913b6410  RBP: 000000000000000a R08: 00000000000005c7 R09: 0000000000000002  R10: ffffb9b003a87ce0 R11: 0000000000000002 R12: 0000000000000001  R13: ffffb9b003a87ce0 R14: ffffffffffffffef R15: 0000000000000008  FS:  00007fce81209240(0000) GS:ffff9bf6fdd00000(0000) knlGS:0000000000000000  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033  CR2: 000055e99b728000 CR3: 00000001277c0002 CR4: 0000000000172ef0  Call Trace:   \u003cTASK\u003e   ? __warn.cold+0xb7/0x14d   ? tracepoint_add_func+0x3b6/0x3f0   ? report_bug+0xea/0x170   ? handle_bug+0x58/0x90   ? exc_invalid_op+0x17/0x70   ? asm_exc_invalid_op+0x1a/0x20   ? __pfx_trace_sched_migrate_callback+0x10/0x10   ? tracepoint_add_func+0x3b6/0x3f0   ? __pfx_trace_sched_migrate_callback+0x10/0x10   ? __pfx_trace_sched_migrate_callback+0x10/0x10   tracepoint_probe_register+0x78/0xb0   ? __pfx_trace_sched_migrate_callback+0x10/0x10   osnoise_workload_start+0x2b5/0x370   timerlat_tracer_init+0x76/0x1b0   tracing_set_tracer+0x244/0x400   tracing_set_trace_write+0xa0/0xe0   vfs_write+0xfc/0x570   ? do_sys_openat2+0x9c/0xe0   ksys_write+0x72/0xf0   do_syscall_64+0x79/0x1c0   entry_SYSCALL_64_after_hwframe+0x76/0x7e","modified":"2026-08-27T23:05:07.545112399Z","published":"2025-02-27T03:15:13.923Z","upstream":["CVE-2025-21733"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-21733"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.15-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-21733.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.15-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-21733.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}