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| author | Ingo Molnar <mingo@kernel.org> | 2016-03-07 09:27:30 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-03-07 09:27:30 +0100 |
| commit | ec87e1cf7d8399d81d8965c6d852f8057a8dd687 (patch) | |
| tree | 472a168fa4861090edf110c8a9712a5c15ea259f /kernel/trace/trace_stack.c | |
| parent | 869ae76147ffdf21ad24f0e599303cd58a2bb39f (diff) | |
| parent | f6cede5b49e822ebc41a099fe41ab4989f64e2cb (diff) | |
| download | lwn-ec87e1cf7d8399d81d8965c6d852f8057a8dd687.tar.gz lwn-ec87e1cf7d8399d81d8965c6d852f8057a8dd687.zip | |
Merge tag 'v4.5-rc7' into x86/asm, to pick up SMAP fix
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/trace/trace_stack.c')
| -rw-r--r-- | kernel/trace/trace_stack.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c index 202df6cffcca..2a1abbaca10e 100644 --- a/kernel/trace/trace_stack.c +++ b/kernel/trace/trace_stack.c @@ -156,7 +156,11 @@ check_stack(unsigned long ip, unsigned long *stack) for (; p < top && i < stack_trace_max.nr_entries; p++) { if (stack_dump_trace[i] == ULONG_MAX) break; - if (*p == stack_dump_trace[i]) { + /* + * The READ_ONCE_NOCHECK is used to let KASAN know that + * this is not a stack-out-of-bounds error. + */ + if ((READ_ONCE_NOCHECK(*p)) == stack_dump_trace[i]) { stack_dump_trace[x] = stack_dump_trace[i++]; this_size = stack_trace_index[x++] = (top - p) * sizeof(unsigned long); |