Jan Engelhardt <jengelh@xxxxxxx> wrote: > queue_cache_init is first called for the Control Word Queue > (n2_crypto_probe). At that time, queue_cache[0] is NULL and a new > kmem_cache will be allocated. If the subsequent n2_register_algs call > fails, the kmem_cache will be released in queue_cache_destroy, but > queue_cache_init[0] is not set back to NULL. > > So when the Module Arithmetic Unit gets probed next (n2_mau_probe), > queue_cache_init will not allocate a kmem_cache again, but leave it > as its bogus value, causing a BUG() to trigger when queue_cache[0] is > eventually passed to kmem_cache_zalloc: > > n2_crypto: Found N2CP at /virtual-devices@100/n2cp@7 > n2_crypto: Registered NCS HVAPI version 2.0 > called queue_cache_init > n2_crypto: md5 alg registration failed > n2cp f028687c: /virtual-devices@100/n2cp@7: Unable to register algorithms. > called queue_cache_destroy > n2cp: probe of f028687c failed with error -22 > n2_crypto: Found NCP at /virtual-devices@100/ncp@6 > n2_crypto: Registered NCS HVAPI version 2.0 > called queue_cache_init > kernel BUG at mm/slab.c:2993! > Call Trace: > [0000000000604488] kmem_cache_alloc+0x1a8/0x1e0 > (inlined) kmem_cache_zalloc > (inlined) new_queue > (inlined) spu_queue_setup > (inlined) handle_exec_unit > [0000000010c61eb4] spu_mdesc_scan+0x1f4/0x460 [n2_crypto] > [0000000010c62b80] n2_mau_probe+0x100/0x220 [n2_crypto] > [000000000084b174] platform_drv_probe+0x34/0xc0 > > Signed-off-by: Jan Engelhardt <jengelh@xxxxxxx> Patch applied. Thanks. -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
