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mm: slub: panic for object and slab errors

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If the SLUB_DEBUG_PANIC_ON Kconfig option is
selected, also panic for object and slab
errors to allow capturing relevant debug
data.

Change-Id: Idc582ef48d3c0d866fa89cf8660ff0a5402f7e15
Signed-off-by: David Keitel <dkeitel@codeaurora.org>
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>
[isaacm@codeaurora.org: Use IS_ENABLED() for better legibility]
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>
This commit is contained in:
David Keitel 2014-10-21 16:26:17 -07:00 committed by Isaac J. Manjarres
parent 2e081913d7
commit 8f9b0e0a8e
1 changed files with 9 additions and 0 deletions
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9
mm/slub.c
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@ -686,11 +686,18 @@ static void print_trailer(struct kmem_cache *s, struct page *page, u8 *p)
dump_stack();
}
static void slab_panic(const char *cause)
{
if (IS_ENABLED(CONFIG_SLUB_DEBUG_PANIC_ON))
panic("%s\n", cause);
}
void object_err(struct kmem_cache *s, struct page *page,
u8 *object, char *reason)
{
slab_bug(s, "%s", reason);
print_trailer(s, page, object);
slab_panic(reason);
}
static __printf(3, 4) void slab_err(struct kmem_cache *s, struct page *page,
@ -705,6 +712,7 @@ static __printf(3, 4) void slab_err(struct kmem_cache *s, struct page *page,
slab_bug(s, "%s", buf);
print_page_info(page);
dump_stack();
slab_panic("slab error");
}
static void init_object(struct kmem_cache *s, void *object, u8 val)
@ -726,6 +734,7 @@ static void init_object(struct kmem_cache *s, void *object, u8 val)
static void restore_bytes(struct kmem_cache *s, char *message, u8 data,
void *from, void *to)
{
slab_panic("object poison overwritten");
slab_fix(s, "Restoring 0x%p-0x%p=0x%x\n", from, to - 1, data);
memset(from, data, to - from);
}