With CONFIG_PREEMPT=y on an SMP AMD (2CPU):
Sleeping function called from illegal context at slab.c:1374
f79dbe2c c0117094 c0280b00 c02847cb 0000055e f7817b40 c01328fd c02847cb
0000055e f79da000 f7ede980 c03ecc58 f7817b40 c025af91 c18cf248 c0266b3e
00000024 000001d0 f79da000 00000286 00000001 bffffc9c c02f63e0 c0266e20
Call Trace:
[<c0117094>]__might_sleep+0x54/0x58
[<c01328fd>]kmalloc+0x5d/0x1e0
[<c025af91>]fib_add_ifaddr+0x61/0x110
[<c0266b3e>]__sctp_get_local_addr_list+0x9e/0x140
[<c0266e20>]sctp_netdev_event+0x30/0x60
[<c01241ae>]notifier_call_chain+0x1e/0x40
[<c02566f5>]inet_insert_ifa+0x1b5/0x1c0
[<c02567b4>]inet_set_ifa+0xb4/0xc0
[<c0257091>]devinet_ioctl+0x511/0x740
[<c0259897>]inet_ioctl+0x157/0x1b0
[<c021e276>]sock_ioctl+0x56/0x90
[<c0150039>]sys_ioctl+0x289/0x2d8
[<c0107d11>]error_code+0x2d/0x38
[<c01072cf>]syscall_call+0x7/0xb