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| author | Kamal Agrawal <[email protected]> | 2021-07-30 13:23:06 +0000 |
|---|---|---|
| committer | Steven Rostedt (VMware) <[email protected]> | 2021-07-30 22:45:11 +0000 |
| commit | ff41c28c4b54052942180d8b3f49e75f1445135a (patch) | |
| tree | de57fd79d18c741483ed2d60d31048d3f0ed082b /lib/debugobjects.c | |
| parent | tracepoints: Update static_call before tp_funcs when adding a tracepoint (diff) | |
| download | kernel-ff41c28c4b54052942180d8b3f49e75f1445135a.tar.gz kernel-ff41c28c4b54052942180d8b3f49e75f1445135a.zip | |
tracing: Fix NULL pointer dereference in start_creating
The event_trace_add_tracer() can fail. In this case, it leads to a crash
in start_creating with below call stack. Handle the error scenario
properly in trace_array_create_dir.
Call trace:
down_write+0x7c/0x204
start_creating.25017+0x6c/0x194
tracefs_create_file+0xc4/0x2b4
init_tracer_tracefs+0x5c/0x940
trace_array_create_dir+0x58/0xb4
trace_array_create+0x1bc/0x2b8
trace_array_get_by_name+0xdc/0x18c
Link: https://lkml.kernel.org/r/[email protected]
Cc: [email protected]
Fixes: 4114fbfd02f1 ("tracing: Enable creating new instance early boot")
Signed-off-by: Kamal Agrawal <[email protected]>
Signed-off-by: Steven Rostedt (VMware) <[email protected]>
Diffstat (limited to 'lib/debugobjects.c')
0 files changed, 0 insertions, 0 deletions