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Commit face37f5 authored by Dave Jones's avatar Dave Jones Committed by Pekka Enberg
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slab: add taint flag outputting to debug paths. 



When we get corruption reports, it's useful to see if the kernel was
tainted, to rule out problems we can't do anything about.

Signed-off-by: default avatarDave Jones <davej@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarPekka Enberg <penberg@kernel.org>
parent 265d47e7

mm/slab.c

+5 −4
Original line number Diff line number Diff line
@@ -1941,8 +1941,8 @@ static void check_poison_obj(struct kmem_cache *cachep, void *objp) 
			/* Print header */

			if (lines == 0) {

				printk(KERN_ERR

					"Slab corruption: %s start=%p, len=%d\n",

					cachep->name, realobj, size);

					"Slab corruption (%s): %s start=%p, len=%d\n",

					print_tainted(), cachep->name, realobj, size);

				print_objinfo(cachep, objp, 0);

			}

			/* Hexdump the affected line */
@@ -3051,8 +3051,9 @@ static void check_slabp(struct kmem_cache *cachep, struct slab *slabp) 
	if (entries != cachep->num - slabp->inuse) {

bad:

		printk(KERN_ERR "slab: Internal list corruption detected in "

				"cache '%s'(%d), slabp %p(%d). Hexdump:\n",

			cachep->name, cachep->num, slabp, slabp->inuse);

			"cache '%s'(%d), slabp %p(%d). Tainted(%s). Hexdump:\n",

			cachep->name, cachep->num, slabp, slabp->inuse,

			print_tainted());

		print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, slabp,

			sizeof(*slabp) + cachep->num * sizeof(kmem_bufctl_t),

			1);