Description
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.
Product status
4a2b8dda3f8705880ec7408135645602d5590f51 (git) before 2a2deb9f8df70480050351ac27041f19bb9e718b
4a2b8dda3f8705880ec7408135645602d5590f51 (git) before 000aa47a51233fd38a629b029478e0278e1e9fbe
4a2b8dda3f8705880ec7408135645602d5590f51 (git) before edede7a6dcd7435395cf757d053974aaab6ab1c2
2.6.30
Any version before 2.6.30
6.12.45 (semver)
6.16.5 (semver)
6.17 (original_commit_for_fix)
References
git.kernel.org/...c/2a2deb9f8df70480050351ac27041f19bb9e718b
git.kernel.org/...c/000aa47a51233fd38a629b029478e0278e1e9fbe
git.kernel.org/...c/edede7a6dcd7435395cf757d053974aaab6ab1c2
