• Sebastian Andrzej Siewior's avatar
    crypto: ansi_prng - alloc cipher just in init · fd09d7fa
    Sebastian Andrzej Siewior authored
    As reported by Eric Sesterhenn the re-allocation of the cipher in reset leads
    to:
    |BUG: sleeping function called from invalid context at kernel/rwsem.c:21
    |in_atomic(): 1, irqs_disabled(): 0, pid: 4926, name: modprobe
    |INFO: lockdep is turned off.
    |Pid: 4926, comm: modprobe Tainted: G   M 2.6.31-rc1-22297-g52989765 #24
    |Call Trace:
    | [<c011dd93>] __might_sleep+0xf9/0x101
    | [<c0777aa0>] down_read+0x16/0x68
    | [<c048bf04>] crypto_alg_lookup+0x16/0x34
    | [<c048bf52>] crypto_larval_lookup+0x30/0xf9
    | [<c048c038>] crypto_alg_mod_lookup+0x1d/0x62
    | [<c048c13e>] crypto_alloc_base+0x1e/0x64
    | [<c04bf991>] reset_prng_context+0xab/0x13f
    | [<c04e5cfc>] ? __spin_lock_init+0x27/0x51
    | [<c04bfce1>] cprng_init+0x2a/0x42
    | [<c048bb4c>] __crypto_alloc_tfm+0xfa/0x128
    | [<c048c153>] crypto_alloc_base+0x33/0x64
    | [<c04933c9>] alg_test_cprng+0x30/0x1f4
    | [<c0493329>] alg_test+0x12f/0x19f
    | [<c0177f1f>] ? __alloc_pages_nodemask+0x14d/0x481
    | [<d09219e2>] do_test+0xf9d/0x163f [tcrypt]
    ...
    fd09d7fa
ansi_cprng.c 9.63 KB