diff options
| author | Josh Poimboeuf <[email protected]> | 2016-11-17 00:04:58 -0600 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2016-11-17 07:48:39 +0100 |
| commit | f4474c9f0bba17857b1a47c8dc89c07a0845c2b2 (patch) | |
| tree | 57dc79aef94b80fe95c0a96f26908057ddc0b79d /scripts/gcc-plugins/cyc_complexity_plugin.c | |
| parent | adb402cd1461eef6e1a21db4532a3b9e6a6be853 (diff) | |
x86/dumpstack: Handle NULL stack pointer in show_trace_log_lvl()
When show_trace_log_lvl() is called from show_regs(), it completely
fails to dump the stack. This bug was introduced when
show_stack_log_lvl() was removed with the following commit:
0ee1dd9f5e7e ("x86/dumpstack: Remove raw stack dump")
Previous callers of that function now call show_trace_log_lvl()
directly. That resulted in a subtle change, in that the 'stack'
argument can now be NULL in certain cases.
A NULL 'stack' pointer means that the stack dump should start from the
topmost stack frame unless 'regs' is valid, in which case it should
start from 'regs->sp'.
Signed-off-by: Josh Poimboeuf <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Fixes: 0ee1dd9f5e7e ("x86/dumpstack: Remove raw stack dump")
Link: http://lkml.kernel.org/r/c551842302a9c222d96a14e42e4003f059509f69.1479362652.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'scripts/gcc-plugins/cyc_complexity_plugin.c')
0 files changed, 0 insertions, 0 deletions