The following kernel bug is observed due to Android patches to the linux kernel adding UID_STAT support.
kernel: BUG: sleeping function called from invalid context at /srv/ users/mattp/gingerbread/linux-gingerbread/projects/android/build- output /linux-2.6.36.3/mm/slub.c:1701 kernel: in_atomic(): 1, irqs_disabled(): 0, pid: 611, name: RILReceiver kernel: [<c002f98c>] (unwind_backtrace+0x0/0xe4) from [<c00e2880>] (kmem_cache_alloc+0x30/0xb0) kernel: [<c00e2880>] (kmem_cache_alloc+0x30/0xb0) from [<c022b8b0>] (create_stat+0x18/0x118) kernel: [<c022b8b0>] (create_stat+0x18/0x118) from [<c022ba30>] (uid_stat_tcp_rcv+0x28/0x58) kernel: [<c022ba30>] (uid_stat_tcp_rcv+0x28/0x58) from [<c0345684>] (tcp_read_sock+0x210/0x220) kernel: [<c0345684>] (tcp_read_sock+0x210/0x220) from [<c03e9654>] (xs_tcp_data_ready+0x80/0xb4) kernel: [<c03e9654>] (xs_tcp_data_ready+0x80/0xb4) from [<c034d434>] (tcp_rcv_established+0x480/0x60c) kernel: [<c034d434>] (tcp_rcv_established+0x480/0x60c) from [<c0353004>] (tcp_v4_do_rcv+0x24/0x104) kernel: [<c0353004>] (tcp_v4_do_rcv+0x24/0x104) from [<c0354fe8>] (tcp_v4_rcv+0x4b0/0x838) kernel: [<c0354fe8>] (tcp_v4_rcv+0x4b0/0x838) from [<c0336e00>] (ip_local_deliver_finish+0x12c/0x258) kernel: [<c0336e00>] (ip_local_deliver_finish+0x12c/0x258) from [<c0336cb8>] (ip_rcv_finish+0x304/0x320) kernel: [<c0336cb8>] (ip_rcv_finish+0x304/0x320) from [<c02f0b80>] (__netif_receive_skb+0x35c/0x3b4) kernel: [<c02f0b80>] (__netif_receive_skb+0x35c/0x3b4) from [<bf085e98>] (bcmhana_net_poll+0x5b8/0x660 [bcmhana_net]) kernel: [<bf085e98>] (bcmhana_net_poll+0x5b8/0x660 [bcmhana_net]) from [<c02f0f18>] (net_rx_action+0x5c/0x148) kernel: [<c02f0f18>] (net_rx_action+0x5c/0x148) from [<c007eddc>] (__do_softirq+0xa4/0x170) kernel: [<c007eddc>] (__do_softirq+0xa4/0x170) from [<c007f2c4>] (irq_exit+0x80/0xf4) kernel: [<c007f2c4>] (irq_exit+0x80/0xf4) from [<c002a0c8>] (asm_do_IRQ +0xc8/0xf8) kernel: [<c002a0c8>] (asm_do_IRQ+0xc8/0xf8) from [<c002aa08>] (__irq_svc+0x48/0x9c) It looks like the problem is from the Android patch. tcp_read_sock cannot block (it even says so in the code comment above tcp_read_sock) but the Android patch makes it call uid_stat_tcp_rcv within tcp_read_sock. uid_stat_tcp_rcv does block when it calls create_stat, which calls kmalloc to create UID specific entry for tracking the stats. -- unsubscribe: android-kernel+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-kernel
