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authorHoria Geant? <horia.geanta@freescale.com>2015-03-09 16:14:58 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2015-03-12 01:11:05 +1100
commit007ee8dec6843b3b491a4bb42320c0eb8e884f72 (patch)
tree1a3c7b3df34283b4a340f3a5fe634720bd3df8f6 /crypto
parentefdb6f6edb526f160b8db1670b93a07180ac8306 (diff)
downloadkernel-007ee8dec6843b3b491a4bb42320c0eb8e884f72.tar.gz
crypto: tcrypt - fix uninit sg entries in test_acipher_speed
Commit 5be4d4c94b1f ("crypto: replace scatterwalk_sg_next with sg_next") did not consider the fact that scatterwalk_sg_next() was looking at sg entry length, while sg_next() looks at the "chained" sg bit. This should have no effect in theory. However in practice, there are cases where the sg table is initialized to a number of entries and some of them are not properly configured. While scatterwalk_sg_next() would have returned NULL (since sg length = 0 and sg page_link = 0), sg_next() happily returns the next unconfigured sg entry. insmod tcrypt.ko mode=500 sec=1 testing speed of async cbc(aes) (cbc-aes-talitos) encryption test 0 (128 bit key, 16 byte blocks): Unable to handle kernel paging request for data at address 0x00000000 Faulting instruction address: 0xc00d79e4 Oops: Kernel access of bad area, sig: 11 [#1] SMP NR_CPUS=8 P1022 DS Modules linked in: tcrypt(+) talitos CPU: 0 PID: 2670 Comm: insmod Not tainted 4.0.0-rc1-QorIQ-SDK-V1.6+g904f1ca82209 #1 task: e8de3200 ti: e70bc000 task.ti: e70bc000 NIP: c00d79e4 LR: f92d223c CTR: c00d79c8 REGS: e70bda00 TRAP: 0300 Not tainted (4.0.0-rc1-QorIQ-SDK-V1.6+g904f1ca82209) MSR: 00029000 <CE,EE,ME> CR: 84428f22 XER: 00000000 DEAR: 00000000 ESR: 00000000 GPR00: f92d223c e70bdab0 e8de3200 00000000 e70bdbb8 00000001 00000000 00000000 GPR08: 00000000 00000000 c08b0380 27282010 c00d79c8 1003a634 00000000 e70bdf1c GPR16: e70bdef0 00000020 00000000 c08c0000 00000010 00000000 e70bdbb8 00000010 GPR24: e976d3a8 00000010 00000000 e70bdbd8 e8961010 00000001 c086e560 00000000 NIP [c00d79e4] page_address+0x1c/0x110 LR [f92d223c] talitos_map_sg+0x130/0x184 [talitos] Call Trace: [e70bdab0] [00000010] 0x10 (unreliable) [e70bdad0] [f92d223c] talitos_map_sg+0x130/0x184 [talitos] [e70bdb00] [f92d30d8] common_nonsnoop.constprop.13+0xc0/0x304 [talitos] [e70bdb30] [f933fd90] test_acipher_speed+0x434/0x7dc [tcrypt] [e70bdcc0] [f934318c] do_test+0x2478/0x306c [tcrypt] [e70bdd80] [f11fe058] tcrypt_mod_init+0x58/0x100 [tcrypt] [e70bdda0] [c0002354] do_one_initcall+0x90/0x1f4 [e70bde10] [c061fe00] do_init_module+0x60/0x1ac [e70bde30] [c00a79f0] load_module+0x185c/0x1f88 [e70bdee0] [c00a82b0] SyS_finit_module+0x7c/0x98 [e70bdf40] [c000e8b0] ret_from_syscall+0x0/0x3c Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/tcrypt.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c
index 4b9e23fa4204..1a2800107fc8 100644
--- a/crypto/tcrypt.c
+++ b/crypto/tcrypt.c
@@ -1155,9 +1155,9 @@ static void test_acipher_speed(const char *algo, int enc, unsigned int secs,
goto out_free_req;
}
- sg_init_table(sg, TVMEMSIZE);
-
k = *keysize + *b_size;
+ sg_init_table(sg, DIV_ROUND_UP(k, PAGE_SIZE));
+
if (k > PAGE_SIZE) {
sg_set_buf(sg, tvmem[0] + *keysize,
PAGE_SIZE - *keysize);