BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:65
pintu.ping at gmail.com
Wed Feb 13 15:40:55 CET 2019
On Wed, Feb 13, 2019 at 3:21 PM Sai Prakash Ranjan
<saiprakash.ranjan at codeaurora.org> wrote:
> Hi Pintu,
> On 2/13/2019 2:04 PM, Pintu Agarwal wrote:
> > This is the complete logs at the time of crash:
> > [ 21.681020] VFS: Mounted root (ext4 filesystem) readonly on device 8:6.
> > [ 21.690441] devtmpfs: mounted
> > [ 21.702517] Freeing unused kernel memory: 6528K
> > [ 21.766665] BUG: sleeping function called from invalid context at
> > kernel/locking/rwsem.c:65
> > [ 21.775108] in_atomic(): 0, irqs_disabled(): 128, pid: 1, name: init
> > [ 21.781532] ------------[ cut here ]------------
> > [ 21.786209] kernel BUG at kernel/sched/core.c:8490!
> > [ 21.791157] ------------[ cut here ]------------
> > [ 21.795831] kernel BUG at kernel/sched/core.c:8490!
> > [ 21.800763] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
> > [ 21.806319] Modules linked in:
> > [ 21.809474] CPU: 0 PID: 1 Comm: init Not tainted 4.9.103+ #115
> > [ 21.815375] Hardware name: Qualcomm Technologies, Inc. MSM XXXX
> > [ 21.822584] task: ffffffe330440080 task.stack: ffffffe330448000
> > [ 21.828584] PC is at ___might_sleep+0x140/0x188
> > [ 21.833175] LR is at ___might_sleep+0x128/0x188
> > [ 21.837759] pc : [<ffffff88b8ce65a8>] lr : [<ffffff88b8ce6590>]
> > pstate: 604001c5
> > 0000000000000000 ffffffe33044b8d0
> > [ 22.135279] bac0: 0000000000000462 0000000000000006
> > [ 22.140224] [<ffffff88b8ce65a8>] ___might_sleep+0x140/0x188
> > [ 22.145862] [<ffffff88b8ce6648>] __might_sleep+0x58/0x90
> > [ 22.151249] [<ffffff88b9d43f84>] down_write_killable+0x2c/0x80
> > [ 22.157155] [<ffffff88b8e53cd8>] setup_arg_pages+0xb8/0x208
> > [ 22.162792] [<ffffff88b8eb7534>] load_elf_binary+0x434/0x1298
> > [ 22.168600] [<ffffff88b8e55674>] search_binary_handler+0xac/0x1f0
> > [ 22.174763] [<ffffff88b8e560ec>] do_execveat_common.isra.15+0x504/0x6c8
> > [ 22.181452] [<ffffff88b8e562f4>] do_execve+0x44/0x58
> > [ 22.186481] [<ffffff88b8c84030>] run_init_process+0x38/0x48
> > [ 22.192122] [<ffffff88b9d3db1c>] kernel_init+0x8c/0x108
> > [ 22.197411] [<ffffff88b8c83f00>] ret_from_fork+0x10/0x50
> > [ 22.202790] Code: b9453800 0b000020 6b00027f 540000c1 (d4210000)
> > [ 22.208965] ---[ end trace d775a851176a61ec ]---
> > [ 22.220051] Kernel panic - not syncing: Attempted to kill init!
> > exitcode=0x0000000b
> This might be the work of CONFIG_PANIC_ON_SCHED_BUG which is extra debug
> option enabled in *sdm845_defconfig*. You can disable it or better
> I would suggest to use *sdm845-perf_defconfig* instead of
> sdm845_defconfig since there are a lot of debug options enabled
> in the latter which may be not compatible when IPIPE patches
> are applied.
OK thanks for your suggestions. sdm845-perf_defconfig did not work for
me. The target did not boot.
However, disabling CONFIG_PANIC_ON_SCHED_BUG works, and I got a root
shell at least.
This at least proves that there is no issue in core ipipe patches, and
I can proceed.
But this seems to be a work around.
I still get a back trace in kernel logs from many different places.
So, it looks like there is some code in qualcomm specific drivers that
is calling a sleeping method from invalid context.
How to find that...
If this fix is already available in latest version, please let me know.
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