Hi,
i can repeatedly trigger the following bug when modprobing tcrypt
to test the crypto algorithms with todays -git
[ 122.967099] BUG: sleeping function called from invalid context at
kernel/rwsem.c:21
[ 122.967398] in_atomic(): 1, irqs_disabled(): 0, pid: 4926, name:
modprobe
[ 122.967643] INFO: lockdep is turned off.
[ 122.967858] Pid: 4926, comm: modprobe Tainted: G M
2.6.31-rc1-22297-g5298976 #24
[ 122.968176] Call Trace:
[ 122.968411] [<c011dd93>] __might_sleep+0xf9/0x101
[ 122.968677] [<c0777aa0>] down_read+0x16/0x68
[ 122.968928] [<c048bf04>] crypto_alg_lookup+0x16/0x34
[ 122.969479] [<c048bf52>] crypto_larval_lookup+0x30/0xf9
[ 122.969722] [<c048c038>] crypto_alg_mod_lookup+0x1d/0x62
[ 122.969977] [<c048c13e>] crypto_alloc_base+0x1e/0x64
[ 122.970271] [<c04bf991>] reset_prng_context+0xab/0x13f
[ 122.970523] [<c04e5cfc>] ? __spin_lock_init+0x27/0x51
[ 122.970777] [<c04bfce1>] cprng_init+0x2a/0x42
[ 122.971012] [<c048bb4c>] __crypto_alloc_tfm+0xfa/0x128
[ 122.971304] [<c048c153>] crypto_alloc_base+0x33/0x64
[ 122.971556] [<c04933c9>] alg_test_cprng+0x30/0x1f4
[ 122.971809] [<c0493329>] alg_test+0x12f/0x19f
[ 122.972103] [<c0177f1f>] ? __alloc_pages_nodemask+0x14d/0x481
[ 122.972356] [<d09219e2>] do_test+0xf9d/0x163f [tcrypt]
[ 122.972613] [<d0920de6>] do_test+0x3a1/0x163f [tcrypt]
[ 122.972855] [<d0926035>] tcrypt_mod_init+0x35/0x7c [tcrypt]
[ 122.973488] [<c010113c>] _stext+0x54/0x12c
[ 122.974575] [<d0926000>] ? tcrypt_mod_init+0x0/0x7c [tcrypt]
[ 122.974836] [<c01398a3>] ? up_read+0x16/0x2b
[ 122.975126] [<c0139fc4>] ? __blocking_notifier_call_chain+0x40/0x4c
[ 122.975376] [<c014ee8d>] sys_init_module+0xa9/0x1bf
[ 122.975635] [<c010292b>] sysenter_do_call+0x12/0x32
(gdb) l *(crypto_alg_lookup+0x16)
0xc048bf04 is in crypto_alg_lookup (crypto/api.c:201).
196 struct crypto_alg *crypto_alg_lookup(const char *name, u32 type, u32
mask)
197 {
198 struct crypto_alg *alg;
199
200 down_read(&crypto_alg_sem);
201 alg = __crypto_alg_lookup(name, type, mask);
202 up_read(&crypto_alg_sem);
203
204 return alg;
205 }
Please let me know if you need further information or have patches to
test.
Regards, Eric
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