Commit 33334e25 authored Apr 28, 2016 by Alexander Potapenko Committed by Linus Torvalds Apr 28, 2016

lib/stackdepot.c: allow the stack trace hash to be zero



Do not bail out from depot_save_stack() if the stack trace has zero hash.
Initially depot_save_stack() silently dropped stack traces with zero
hashes, however there's actually no point in reserving this zero value.

Reported-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Alexander Potapenko <glider@google.com>
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 99f23c2c

lib/stackdepot.c

+0 −4

Original line number	Diff line number	Diff line
		@@ -210,10 +210,6 @@ depot_stack_handle_t depot_save_stack(struct stack_trace *trace,
		goto fast_exit;

		hash = hash_stack(trace->entries, trace->nr_entries);
		/* Bad luck, we won't store this stack. */
		if (hash == 0)
		goto exit;

		bucket = &stack_table[hash & STACK_HASH_MASK];

		/*