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mm: slub: panic for object and slab errors
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>
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08c53911c5
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1 changed files with 12 additions and 4 deletions
16
mm/slub.c
16
mm/slub.c
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@ -613,11 +613,21 @@ static void print_trailer(struct kmem_cache *s, struct page *page, u8 *p)
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dump_stack();
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}
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#ifdef CONFIG_SLUB_DEBUG_PANIC_ON
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static void slab_panic(const char *cause)
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{
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panic("%s\n", cause);
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}
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#else
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static inline void slab_panic(const char *cause) {}
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#endif
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static void object_err(struct kmem_cache *s, struct page *page,
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u8 *object, char *reason)
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{
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slab_bug(s, "%s", reason);
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print_trailer(s, page, object);
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slab_panic(reason);
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}
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static void slab_err(struct kmem_cache *s, struct page *page, const char *fmt, ...)
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@ -631,6 +641,7 @@ static void slab_err(struct kmem_cache *s, struct page *page, const char *fmt, .
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slab_bug(s, "%s", buf);
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print_page_info(page);
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dump_stack();
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slab_panic("slab error");
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}
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static void init_object(struct kmem_cache *s, void *object, u8 val)
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@ -649,12 +660,9 @@ static void init_object(struct kmem_cache *s, void *object, u8 val)
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static void restore_bytes(struct kmem_cache *s, char *message, u8 data,
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void *from, void *to)
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{
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#ifdef CONFIG_SLUB_DEBUG_PANIC_ON
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panic("Found corruption 0x%p-0x%p=0x%x\n", from, to - 1, data);
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#else
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slab_panic("object poison overwritten");
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slab_fix(s, "Restoring 0x%p-0x%p=0x%x\n", from, to - 1, data);
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memset(from, data, to - from);
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#endif
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}
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static int check_bytes_and_report(struct kmem_cache *s, struct page *page,
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