trace/fgraph: Fix the warning caused by missing unregister notifier
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.6.160, 6.12.45, 6.16.5
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
In the Linux kernel, the following vulnerability has been resolved: trace/fgraph: Fix the warning caused by missing unregister notifier This warning was triggered during testing on v6.16: notifier callback ftrace_suspend_notifier_call already registered WARNING: CPU: 2 PID: 86 at kernel/notifier.c:23 notifier_chain_register+0x44/0xb0 ... Call Trace: <TASK> blocking_notifier_chain_register+0x34/0x60 register_ftrace_graph+0x330/0x410 ftrace_profile_write+0x1e9/0x340 vfs_write+0xf8/0x420 ? filp_flush+0x8a/0xa0 ? filp_close+0x1f/0x30 ? do_dup2+0xaf/0x160 ksys_write+0x65/0xe0 do_syscall_64+0xa4/0x260 entry_SYSCALL_64_after_hwframe+0x77/0x7f When writing to the function_profile_enabled interface, the notifier was not unregistered after start_graph_tracing failed, causing a warning the next time function_profile_enabled was written. Fixed by adding unregister_pm_notifier in the exception path.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
From 4a2b8dda3f8705880ec7408135645602d5590f51 · fixed in aa977309397fe2438801b1ca1ce7bc4106d8e985; From 4a2b8dda3f8705880ec7408135645602d5590f51 · fixed in 2a2deb9f8df70480050351ac27041f19bb9e718b; From 4a2b8dda3f8705880ec7408135645602d5590f51 · fixed in 000aa47a51233fd38a629b029478e0278e1e9fbe; From 4a2b8dda3f8705880ec7408135645602d5590f51 · fixed in edede7a6dcd7435395cf757d053974aaab6ab1c2
- Linux Linux
2.6.30
- KernelLinux
From 2.6.30 · fixed in 6.6.160; From 6.7.0 · fixed in 6.12.45; From 6.13.0 · fixed in 6.16.5