| commit | 04497185f67dd571121e1a44b252229493406558 | |
| author | Steven Rostedt (VMware) <rostedt@goodmis.org> | |
| Fri, 30 Aug 2019 20:30:01 +0000 (30 16:30 -0400) | ||
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
| Fri, 6 Sep 2019 08:20:55 +0000 (6 10:20 +0200) | ||
| tree | cda1a8f2b72dbeaf7344f999742222e8406fc821 | treesnapshot (tar.gz zip) |
| parent | ab9a7cf6500391b32f77302883e4a59539e4eee7 | commitdiff |
ftrace: Check for empty hash and comment the race with registering probes
commit 372e0d01da71c84dcecf7028598a33813b0d5256 upstream.
The race between adding a function probe and reading the probes that exist
is very subtle. It needs a comment. Also, the issue can also happen if the
probe has has the EMPTY_HASH as its func_hash.
Cc: stable@vger.kernel.org
Fixes: 7b60f3d876156 ("ftrace: Dynamically create the probe ftrace_ops for the trace_array")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 372e0d01da71c84dcecf7028598a33813b0d5256 upstream.
The race between adding a function probe and reading the probes that exist
is very subtle. It needs a comment. Also, the issue can also happen if the
probe has has the EMPTY_HASH as its func_hash.
Cc: stable@vger.kernel.org
Fixes: 7b60f3d876156 ("ftrace: Dynamically create the probe ftrace_ops for the trace_array")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| kernel/trace/ftrace.c | diffblobblamehistory |