Skb data ready callback crashing

[david preetham]

sk_data_ready callback crashing, I have used in kmalloc with GFP_ATOMIC
inside callback
but crashing with __might_sleep.

[   57.916454 / 05-28 10:23:43.705][0] Internal error: Oops - BUG: 0 [#1]
PREEMPT SMP
[   57.916464 / 05-28 10:23:43.705][0] Modules linked in: texfat(POE)
[   57.916483 / 05-28 10:23:43.705][0] CPU: 0 PID: 2066 Comm: Binder:2048_1
Tainted: P        W  OE   4.4.63 #143
[   57.916492 / 05-28 10:23:43.705][0] Hardware name: Qualcomm
Technologies, Inc. MSM8998 v2.1 MTP (DT)
[   57.916502 / 05-28 10:23:43.705][0] task: ffffffedc2554c80 ti:
ffffffedc9708000 task.ti: ffffffedc9708000
[   57.916521 / 05-28 10:23:43.705][0] PC is at ___might_sleep+0x134/0x144
[   57.916530 / 05-28 10:23:43.705][0] LR is at ___might_sleep+0xf8/0x144
[   57.916538 / 05-28 10:23:43.705][0] pc : [<ffffff8447ed2dcc>] lr :
[<ffffff8447ed2d90>] pstate: 60400145
[   57.917126 / 05-28 10:23:43.705][0] Call trace:
[   57.917136 / 05-28 10:23:43.705][0] Exception stack(0xffffffedfdb4e080
to 0xffffffedfdb4e1b0)
[   57.917147 / 05-28 10:23:43.705][0] e080: ffffffedc9708000
0000008000000000 00000000832ac000 ffffff8447ed2dcc
[   57.917157 / 05-28 10:23:43.705][0] e0a0: 0000000000000006
0000000000000000 ffffffedfdb4e0d0 ffffff8447f09260
[   57.917167 / 05-28 10:23:43.705][0] e0c0: 0000000000000000
ffffff844a810000 ffffffedfdb4e170 ffffff8447f09454
[   57.917178 / 05-28 10:23:43.705][0] e0e0: ffffff8447f0940c
ffffff84497712ab 000000000000053a 0000000000000000
[   57.917190 / 05-28 10:23:43.705][0] e100: ffffffedebec1590
ffffff844868d0bc 000000000000000c ffffff84498a21b7
[   57.917200 / 05-28 10:23:43.705][0] e120: 0000000000000140
0000000057ac6e9d 0000000000000102 0000000000000000
[   57.917211 / 05-28 10:23:43.705][0] e140: 0000000000000000
ffffff8008180000 000000000000006a ffffff844a83a9b8
[   57.917221 / 05-28 10:23:43.705][0] e160: ffffff84480efd38
372e33343a33323a 69205d305b5d3530 63696d6f74615f6e
[   57.917231 / 05-28 10:23:43.705][0] e180: 69202c31203a2928
617369645f737172 203a292864656c62 0000000000000000
[   57.917241 / 05-28 10:23:43.705][0] e1a0: ffffff8447ffb7b4
0000007f9da5e58c
[   57.917251 / 05-28 10:23:43.705][0] [<ffffff8447ed2dcc>]
___might_sleep+0x134/0x144
[   57.917261 / 05-28 10:23:43.705][0] [<ffffff8447ed2e58>]
__might_sleep+0x7c/0x8c
[   57.917275 / 05-28 10:23:43.705][0] [<ffffff8447fda74c>]
kmem_cache_alloc_trace+0x60/0x25c
[   57.917289 / 05-28 10:23:43.705][0] [<ffffff844868d0bc>]
mausb_sock_data_ready+0x394/0x57c
[   57.917303 / 05-28 10:23:43.705][0] [<ffffff8448fa79ec>]
tcp_data_queue+0x55c/0xba8
[   57.917312 / 05-28 10:23:43.705][0] [<ffffff8448fa8338>]
tcp_rcv_established+0x300/0x6d8
[   57.917325 / 05-28 10:23:43.705][0] [<ffffff8448fb11b0>]
tcp_v4_do_rcv+0xf4/0x1f8
[   57.917337 / 05-28 10:23:43.705][0] [<ffffff8448fb3c64>]
tcp_v4_rcv+0x8a4/0xf38
[   57.917349 / 05-28 10:23:43.705][0] [<ffffff8448f8e358>]
ip_local_deliver_finish+0x118/0x224
[   57.917359 / 05-28 10:23:43.705][0] [<ffffff8448f8e8e4>]
ip_local_deliver+0xcc/0xe0
[   57.917369 / 05-28 10:23:43.705][0] [<ffffff8448f8e698>]
ip_rcv_finish+0x234/0x29c
[   57.917380 / 05-28 10:23:43.705][0] [<ffffff8448f8ebe8>]
ip_rcv+0x2f0/0x390
[   57.975786 / 05-28 10:23:43.765][0] Kernel panic - not syncing: Fatal
exception in interrupt


code:
static void sock_data_ready(struct sock *sk)
{
skb_buff_rcv.skb_data = kmalloc(packet_length, GFP_ATOMIC);// allocating
memory and copying skb data
}
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