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linux/drivers/crypto/caam
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Vakul Garg 9c23b7d3d6 crypto: caam - Fixed the memory out of bound overwrite issue 
When kernel is compiled with CONFIG_SLUB_DEBUG=y and
CRYPTO_MANAGER_DISABLE_TESTS=n, during kernel bootup, the kernel
reports error given below. The root cause is that in function
hash_digest_key(), for allocating descriptor, insufficient memory was
being allocated. The required number of descriptor words apart from
input and output pointers are 8 (instead of 6).

=============================================================================
BUG dma-kmalloc-32 (Not tainted): Redzone overwritten
-----------------------------------------------------------------------------

Disabling lock debugging due to kernel taint
INFO: 0xdec5dec0-0xdec5dec3. First byte 0x0 instead of 0xcc
INFO: Allocated in ahash_setkey+0x60/0x594 age=7 cpu=1 pid=1257
        __kmalloc+0x154/0x1b4
        ahash_setkey+0x60/0x594
        test_hash+0x260/0x5a0
        alg_test_hash+0x48/0xb0
        alg_test+0x84/0x228
        cryptomgr_test+0x4c/0x54
        kthread+0x98/0x9c
        ret_from_kernel_thread+0x64/0x6c
INFO: Slab 0xc0bd0ba0 objects=19 used=2 fp=0xdec5d0d0 flags=0x0081
INFO: Object 0xdec5dea0 @offset=3744 fp=0x5c200014

Bytes b4 dec5de90: 00 00 00 00 00 00 00 00 5a 5a 5a 5a 5a 5a 5a 5a
........ZZZZZZZZ
Object dec5dea0: b0 80 00 0a 84 41 00 0d f0 40 00 00 00 67 3f c0
.....A...@...g?.
Object dec5deb0: 00 00 00 50 2c 14 00 50 f8 40 00 00 1e c5 d0 00
...P,..P.@......
Redzone dec5dec0: 00 00 00 14                                      ....
Padding dec5df68: 5a 5a 5a 5a 5a 5a 5a 5a
ZZZZZZZZ
Call Trace:
[dec65b60] [c00071b4] show_stack+0x4c/0x168 (unreliable)
[dec65ba0] [c00d4ec8] check_bytes_and_report+0xe4/0x11c
[dec65bd0] [c00d507c] check_object+0x17c/0x23c
[dec65bf0] [c0550a00] free_debug_processing+0xf4/0x294
[dec65c20] [c0550bdc] __slab_free+0x3c/0x294
[dec65c80] [c03f0744] ahash_setkey+0x4e0/0x594
[dec65cd0] [c01ef138] test_hash+0x260/0x5a0
[dec65e50] [c01ef4c0] alg_test_hash+0x48/0xb0
[dec65e70] [c01eecc4] alg_test+0x84/0x228
[dec65ee0] [c01ec640] cryptomgr_test+0x4c/0x54
[dec65ef0] [c005adc0] kthread+0x98/0x9c
[dec65f40] [c000e1ac] ret_from_kernel_thread+0x64/0x6c
FIX dma-kmalloc-32: Restoring 0xdec5dec0-0xdec5dec3=0xcc

Change-Id: I0c7a1048053e811025d1c3b487940f87345c8f5d
Signed-off-by: Vakul Garg <vakul@freescale.com>
CC: <stable@vger.kernel.org> #3.9
Reviewed-by: Geanta Neag Horia Ioan-B05471 <horia.geanta@freescale.com>
Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
Tested-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2013-07-10 16:47:13 +10:00
..
caamalg.c crypto: caam - fix inconsistent assoc dma mapping direction 2013-05-14 10:37:57 +08:00
caamhash.c crypto: caam - Fixed the memory out of bound overwrite issue 2013-07-10 16:47:13 +10:00
caamrng.c crypto: caam - set descriptor sharing type to SERIAL 2012-08-01 17:47:31 +08:00
compat.h Revert "crypto: caam - add IPsec ESN support" 2013-03-21 17:36:03 +08:00
ctrl.c crypto: caam - FIX RNG init for RNG greater than equal to 4 2013-05-14 10:14:51 +08:00
ctrl.h crypto: caam - ERA retrieval and printing for SEC device 2012-07-11 11:06:11 +08:00
desc_constr.h crypto: caam - Add new macros for building extended SEC descriptors (> 64 words) 2013-05-28 15:37:07 +08:00
desc.h crypto: caam - add missing flag for the LOAD/STORE commands 2013-05-28 15:37:08 +08:00
error.c crypto: caam - static constify error data 2013-04-25 21:01:43 +08:00
error.h crypto: caam - fix printk recursion for long error texts 2011-05-04 15:15:06 +10:00
intern.h crypto: caam - fix job ring cleanup code 2013-04-25 21:09:07 +08:00
jr.c crypto: caam - fix job ring cleanup code 2013-04-25 21:09:07 +08:00
jr.h crypto: caam - Add support for the Freescale SEC4/CAAM 2011-03-27 10:45:16 +08:00
Kconfig crypto: caam - fix typo "CRYPTO_AHASH" 2013-03-10 18:16:36 +08:00
key_gen.c crypto: caam - change key gen functions to return signed int 2013-04-25 21:01:43 +08:00
key_gen.h crypto: caam - change key gen functions to return signed int 2013-04-25 21:01:43 +08:00
Makefile crypto: caam - hwrng support 2012-06-27 14:42:06 +08:00
pdb.h crypto: caam - Add define for Adjust Output Frame Length in PDB 2013-05-28 15:37:08 +08:00
regs.h crypto: caam - FIX RNG init for RNG greater than equal to 4 2013-05-14 10:14:51 +08:00
sg_sw_sec4.h crypto: caam - chaining support 2012-06-27 14:42:05 +08:00