* BUG: sleeping function called from invalid context at mm/slab.h:421
@ 2018-11-08 16:23 Qian Cai
2018-11-08 17:22 ` Qian Cai
0 siblings, 1 reply; 3+ messages in thread
From: Qian Cai @ 2018-11-08 16:23 UTC (permalink / raw)
To: linux-kernel; +Cc: linux-mm
Just booting up the latest git master (b00d209) on an aarch64 server and saw this.
Nov 8 11:06:36 huawei-t2280-03 kernel: BUG: sleeping function called from invalid context at mm/slab.h:421
Nov 8 11:06:36 huawei-t2280-03 kernel: in_atomic(): 1, irqs_disabled(): 128, pid: 0, name: swapper/1
Nov 8 11:06:36 huawei-t2280-03 kernel: no locks held by swapper/1/0.
Nov 8 11:06:36 huawei-t2280-03 kernel: irq event stamp: 0
Nov 8 11:06:36 huawei-t2280-03 kernel: hardirqs last enabled at (0): [<0000000000000000>] (null)
Nov 8 11:06:36 huawei-t2280-03 kernel: hardirqs last disabled at (0): [<ffff2000080e24ec>] copy_process.isra.32.part.33+0x460/0x1534
Nov 8 11:06:36 huawei-t2280-03 kernel: softirqs last enabled at (0): [<ffff2000080e24ec>] copy_process.isra.32.part.33+0x460/0x1534
Nov 8 11:06:36 huawei-t2280-03 kernel: softirqs last disabled at (0): [<0000000000000000>] (null)
Nov 8 11:06:36 huawei-t2280-03 kernel: CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.20.0-rc1+ #3
Nov 8 11:06:36 huawei-t2280-03 kernel: Call trace:
Nov 8 11:06:36 huawei-t2280-03 kernel: dump_backtrace+0x0/0x190
Nov 8 11:06:36 huawei-t2280-03 kernel: show_stack+0x24/0x2c
Nov 8 11:06:36 huawei-t2280-03 kernel: dump_stack+0xa4/0xe0
Nov 8 11:06:36 huawei-t2280-03 kernel: ___might_sleep+0x208/0x234
Nov 8 11:06:36 huawei-t2280-03 kernel: __might_sleep+0x58/0x8c
Nov 8 11:06:36 huawei-t2280-03 kernel: kmem_cache_alloc_trace+0x29c/0x420
Nov 8 11:06:36 huawei-t2280-03 kernel: efi_mem_reserve_persistent+0x50/0xe8
Nov 8 11:06:36 huawei-t2280-03 kernel: its_cpu_init_lpis+0x298/0x2e0
Nov 8 11:06:36 huawei-t2280-03 kernel: its_cpu_init+0x7c/0x1a8
Nov 8 11:06:36 huawei-t2280-03 kernel: gic_starting_cpu+0x28/0x34
Nov 8 11:06:36 huawei-t2280-03 kernel: cpuhp_invoke_callback+0x104/0xd04
Nov 8 11:06:36 huawei-t2280-03 kernel: notify_cpu_starting+0x60/0xa0
Nov 8 11:06:36 huawei-t2280-03 kernel: secondary_start_kernel+0xcc/0x178
Any idea?
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: BUG: sleeping function called from invalid context at mm/slab.h:421
2018-11-08 16:23 BUG: sleeping function called from invalid context at mm/slab.h:421 Qian Cai
@ 2018-11-08 17:22 ` Qian Cai
2018-11-08 17:25 ` Ard Biesheuvel
0 siblings, 1 reply; 3+ messages in thread
From: Qian Cai @ 2018-11-08 17:22 UTC (permalink / raw)
To: linux-kernel; +Cc: linux-mm, Ard Biesheuvel, linux-efi
Looks like more of an EFI issue where it called efi_mem_reserve_persistent().
> Sent: Thursday, November 08, 2018 at 11:23 AM
> From: "Qian Cai" <cai@gmx.us>
> To: linux-kernel@vger.kernel.org
> Cc: linux-mm@kvack.org
> Subject: BUG: sleeping function called from invalid context at mm/slab.h:421
>
> Just booting up the latest git master (b00d209) on an aarch64 server and saw this.
>
> Nov 8 11:06:36 huawei-t2280-03 kernel: BUG: sleeping function called from invalid context at mm/slab.h:421
> Nov 8 11:06:36 huawei-t2280-03 kernel: in_atomic(): 1, irqs_disabled(): 128, pid: 0, name: swapper/1
> Nov 8 11:06:36 huawei-t2280-03 kernel: no locks held by swapper/1/0.
> Nov 8 11:06:36 huawei-t2280-03 kernel: irq event stamp: 0
> Nov 8 11:06:36 huawei-t2280-03 kernel: hardirqs last enabled at (0): [<0000000000000000>] (null)
> Nov 8 11:06:36 huawei-t2280-03 kernel: hardirqs last disabled at (0): [<ffff2000080e24ec>] copy_process.isra.32.part.33+0x460/0x1534
> Nov 8 11:06:36 huawei-t2280-03 kernel: softirqs last enabled at (0): [<ffff2000080e24ec>] copy_process.isra.32.part.33+0x460/0x1534
> Nov 8 11:06:36 huawei-t2280-03 kernel: softirqs last disabled at (0): [<0000000000000000>] (null)
> Nov 8 11:06:36 huawei-t2280-03 kernel: CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.20.0-rc1+ #3
> Nov 8 11:06:36 huawei-t2280-03 kernel: Call trace:
> Nov 8 11:06:36 huawei-t2280-03 kernel: dump_backtrace+0x0/0x190
> Nov 8 11:06:36 huawei-t2280-03 kernel: show_stack+0x24/0x2c
> Nov 8 11:06:36 huawei-t2280-03 kernel: dump_stack+0xa4/0xe0
> Nov 8 11:06:36 huawei-t2280-03 kernel: ___might_sleep+0x208/0x234
> Nov 8 11:06:36 huawei-t2280-03 kernel: __might_sleep+0x58/0x8c
> Nov 8 11:06:36 huawei-t2280-03 kernel: kmem_cache_alloc_trace+0x29c/0x420
> Nov 8 11:06:36 huawei-t2280-03 kernel: efi_mem_reserve_persistent+0x50/0xe8
> Nov 8 11:06:36 huawei-t2280-03 kernel: its_cpu_init_lpis+0x298/0x2e0
> Nov 8 11:06:36 huawei-t2280-03 kernel: its_cpu_init+0x7c/0x1a8
> Nov 8 11:06:36 huawei-t2280-03 kernel: gic_starting_cpu+0x28/0x34
> Nov 8 11:06:36 huawei-t2280-03 kernel: cpuhp_invoke_callback+0x104/0xd04
> Nov 8 11:06:36 huawei-t2280-03 kernel: notify_cpu_starting+0x60/0xa0
> Nov 8 11:06:36 huawei-t2280-03 kernel: secondary_start_kernel+0xcc/0x178
>
> Any idea?
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: BUG: sleeping function called from invalid context at mm/slab.h:421
2018-11-08 17:22 ` Qian Cai
@ 2018-11-08 17:25 ` Ard Biesheuvel
0 siblings, 0 replies; 3+ messages in thread
From: Ard Biesheuvel @ 2018-11-08 17:25 UTC (permalink / raw)
To: Qian Cai, Marc Zyngier; +Cc: Linux Kernel Mailing List, Linux-MM, linux-efi
(+ Marc)
On 8 November 2018 at 18:22, Qian Cai <cai@gmx.us> wrote:
> Looks like more of an EFI issue where it called efi_mem_reserve_persistent().
>
>> Sent: Thursday, November 08, 2018 at 11:23 AM
>> From: "Qian Cai" <cai@gmx.us>
>> To: linux-kernel@vger.kernel.org
>> Cc: linux-mm@kvack.org
>> Subject: BUG: sleeping function called from invalid context at mm/slab.h:421
>>
>> Just booting up the latest git master (b00d209) on an aarch64 server and saw this.
>>
>> Nov 8 11:06:36 huawei-t2280-03 kernel: BUG: sleeping function called from invalid context at mm/slab.h:421
>> Nov 8 11:06:36 huawei-t2280-03 kernel: in_atomic(): 1, irqs_disabled(): 128, pid: 0, name: swapper/1
>> Nov 8 11:06:36 huawei-t2280-03 kernel: no locks held by swapper/1/0.
>> Nov 8 11:06:36 huawei-t2280-03 kernel: irq event stamp: 0
>> Nov 8 11:06:36 huawei-t2280-03 kernel: hardirqs last enabled at (0): [<0000000000000000>] (null)
>> Nov 8 11:06:36 huawei-t2280-03 kernel: hardirqs last disabled at (0): [<ffff2000080e24ec>] copy_process.isra.32.part.33+0x460/0x1534
>> Nov 8 11:06:36 huawei-t2280-03 kernel: softirqs last enabled at (0): [<ffff2000080e24ec>] copy_process.isra.32.part.33+0x460/0x1534
>> Nov 8 11:06:36 huawei-t2280-03 kernel: softirqs last disabled at (0): [<0000000000000000>] (null)
>> Nov 8 11:06:36 huawei-t2280-03 kernel: CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.20.0-rc1+ #3
>> Nov 8 11:06:36 huawei-t2280-03 kernel: Call trace:
>> Nov 8 11:06:36 huawei-t2280-03 kernel: dump_backtrace+0x0/0x190
>> Nov 8 11:06:36 huawei-t2280-03 kernel: show_stack+0x24/0x2c
>> Nov 8 11:06:36 huawei-t2280-03 kernel: dump_stack+0xa4/0xe0
>> Nov 8 11:06:36 huawei-t2280-03 kernel: ___might_sleep+0x208/0x234
>> Nov 8 11:06:36 huawei-t2280-03 kernel: __might_sleep+0x58/0x8c
>> Nov 8 11:06:36 huawei-t2280-03 kernel: kmem_cache_alloc_trace+0x29c/0x420
>> Nov 8 11:06:36 huawei-t2280-03 kernel: efi_mem_reserve_persistent+0x50/0xe8
>> Nov 8 11:06:36 huawei-t2280-03 kernel: its_cpu_init_lpis+0x298/0x2e0
>> Nov 8 11:06:36 huawei-t2280-03 kernel: its_cpu_init+0x7c/0x1a8
>> Nov 8 11:06:36 huawei-t2280-03 kernel: gic_starting_cpu+0x28/0x34
>> Nov 8 11:06:36 huawei-t2280-03 kernel: cpuhp_invoke_callback+0x104/0xd04
>> Nov 8 11:06:36 huawei-t2280-03 kernel: notify_cpu_starting+0x60/0xa0
>> Nov 8 11:06:36 huawei-t2280-03 kernel: secondary_start_kernel+0xcc/0x178
>>
>> Any idea?
OK, so apparently, we are being invoked from atomic context
Please try this
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 249eb70691b0..44ed6792de7c 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -971,7 +971,7 @@ int efi_mem_reserve_persistent(phys_addr_t addr, u64 size)
if (efi.mem_reserve == EFI_INVALID_TABLE_ADDR)
return -ENODEV;
- rsv = kmalloc(sizeof(*rsv), GFP_KERNEL);
+ rsv = kmalloc(sizeof(*rsv), GFP_ATOMIC);
if (!rsv)
return -ENOMEM;
^ permalink raw reply related [flat|nested] 3+ messages in thread
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2018-11-08 16:23 BUG: sleeping function called from invalid context at mm/slab.h:421 Qian Cai
2018-11-08 17:22 ` Qian Cai
2018-11-08 17:25 ` Ard Biesheuvel
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