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| author | Horia Geant? <horia.geanta@freescale.com> | 2015-08-27 18:38:36 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2015-09-21 22:00:36 +0800 |
| commit | f074f7b103a915edb1edf833f96a902adeb374cf (patch) | |
| tree | eed2c4e554ac99b35c964c000271af99d6fd855c /crypto/tcrypt.c | |
| parent | 1f93e4a96c9109378204c147b3eec0d0e8100fde (diff) | |
| download | linux-f074f7b103a915edb1edf833f96a902adeb374cf.tar.bz2 | |
crypto: tcrypt - avoid mapping from module image addresses
The output buffer in test_ahash_speed will point to an address located
within the tcrypt module image.
This causes problems when trying to DMA map the buffer.
For e.g. on ARM-based LS1021A, a page fault occurs within the
DMA API when trying to access the struct page returned by
virt_to_page(output):
insmod tcrypt.ko mode=403
testing speed of async sha1 (sha1-caam)
test 0 ( 16 byte blocks, 16 bytes per update, 1 updates):
Unable to handle kernel paging request at virtual address f07e9080
pgd = e58d0e00
[f07e9080] *pgd=80000080007003, *pmd=00000000
Internal error: Oops: 206 [#1] SMP THUMB2
Modules linked in: tcrypt(+)
CPU: 1 PID: 1119 Comm: insmod Not tainted 4.2.0-rc1-256134-gbf433416e675 #1
Hardware name: Freescale LS1021A
task: ea063900 ti: e5a34000 task.ti: e5a34000
PC is at dma_cache_maint_page+0x38/0xd0
LR is at __dma_page_cpu_to_dev+0x15/0x64
pc : [<800155a0>] lr : [<8001564d>] psr: 000f0033
sp : e5a35ca0 ip : 8063df00 fp : f07e9080
r10: 00000cd0 r9 : 8063df00 r8 : 805a2f04
r7 : 0017f804 r6 : 00000002 r5 : ee7f9000 r4 : 00000014
r3 : 80612d40 r2 : 01ff0080 r1 : 00000380 r0 : ee7f9000
Flags: nzcv IRQs on FIQs on Mode SVC_32 ISA Thumb Segment user
Control: 70c5387d Table: e58d0e00 DAC: 9b7ede70
Process insmod (pid: 1119, stack limit = 0xe5a34210)
Stack: (0xe5a35ca0 to 0xe5a36000)
[...]
[<800155a0>] (dma_cache_maint_page) from [<8001564d>] (__dma_page_cpu_to_dev+0x15/0x64)
[<8001564d>] (__dma_page_cpu_to_dev) from [<800156eb>] (arm_dma_map_page+0x1f/0x44)
[<800156eb>] (arm_dma_map_page) from [<802935e3>] (ahash_digest+0x35f/0x510)
[<802935e3>] (ahash_digest) from [<7f800d03>] (test_ahash_speed.constprop.6+0x24a/0x4e4 [tcrypt])
[<7f800d03>] (test_ahash_speed.constprop.6 [tcrypt]) from [<7f802fd5>] (do_test+0x1898/0x2058 [tcrypt])
[<7f802fd5>] (do_test [tcrypt]) from [<7f80802f>] (tcrypt_mod_init+0x2e/0x63 [tcrypt])
[<7f80802f>] (tcrypt_mod_init [tcrypt]) from [<80009517>] (do_one_initcall+0xb3/0x134)
[<80009517>] (do_one_initcall) from [<80351ec7>] (do_init_module+0x3b/0x13c)
[<80351ec7>] (do_init_module) from [<8005cc3f>] (load_module+0x97b/0x9dc)
[<8005cc3f>] (load_module) from [<8005cd8d>] (SyS_finit_module+0x35/0x3e)
[<8005cd8d>] (SyS_finit_module) from [<8000d101>] (ret_fast_syscall+0x1/0x4c)
Code: 1aba 0152 eb00 0b02 (5882) 0f92
addr2line -f -i -e vmlinux 800155a0
page_zonenum
include/linux/mm.h:728
page_zone
include/linux/mm.h:881
dma_cache_maint_page
arch/arm/mm/dma-mapping.c:822
Signed-off-by: Horia Geant? <horia.geanta@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/tcrypt.c')
| -rw-r--r-- | crypto/tcrypt.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c index 2b00b617daab..46a4a757d478 100644 --- a/crypto/tcrypt.c +++ b/crypto/tcrypt.c @@ -48,6 +48,8 @@ #define ENCRYPT 1 #define DECRYPT 0 +#define MAX_DIGEST_SIZE 64 + /* * return a string with the driver name */ @@ -950,7 +952,7 @@ static void test_ahash_speed(const char *algo, unsigned int secs, struct tcrypt_result tresult; struct ahash_request *req; struct crypto_ahash *tfm; - static char output[1024]; + char *output; int i, ret; tfm = crypto_alloc_ahash(algo, 0, 0); @@ -963,9 +965,9 @@ static void test_ahash_speed(const char *algo, unsigned int secs, printk(KERN_INFO "\ntesting speed of async %s (%s)\n", algo, get_driver_name(crypto_ahash, tfm)); - if (crypto_ahash_digestsize(tfm) > sizeof(output)) { - pr_err("digestsize(%u) > outputbuffer(%zu)\n", - crypto_ahash_digestsize(tfm), sizeof(output)); + if (crypto_ahash_digestsize(tfm) > MAX_DIGEST_SIZE) { + pr_err("digestsize(%u) > %d\n", crypto_ahash_digestsize(tfm), + MAX_DIGEST_SIZE); goto out; } @@ -980,6 +982,10 @@ static void test_ahash_speed(const char *algo, unsigned int secs, ahash_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG, tcrypt_complete, &tresult); + output = kmalloc(MAX_DIGEST_SIZE, GFP_KERNEL); + if (!output) + goto out_nomem; + for (i = 0; speed[i].blen != 0; i++) { if (speed[i].blen > TVMEMSIZE * PAGE_SIZE) { pr_err("template (%u) too big for tvmem (%lu)\n", @@ -1006,6 +1012,9 @@ static void test_ahash_speed(const char *algo, unsigned int secs, } } + kfree(output); + +out_nomem: ahash_request_free(req); out: |