Re: 32-bit Amlogic (ARM) SoC: kernel BUG in kfree()

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Hi Matthew,

On Thu, Mar 21, 2019 at 10:44 PM Matthew Wilcox <willy@xxxxxxxxxxxxx> wrote:
>
> On Thu, Mar 21, 2019 at 09:17:34PM +0100, Martin Blumenstingl wrote:
> > Hello,
> >
> > I am experiencing the following crash:
> >   ------------[ cut here ]------------
> >   kernel BUG at mm/slub.c:3950!
>
>         if (unlikely(!PageSlab(page))) {
>                 BUG_ON(!PageCompound(page));
>
> You called kfree() on the address of a page which wasn't allocated by slab.
>
> > I have traced this crash to the kfree() in meson_nfc_read_buf().
> > my observation is as follows:
> > - meson_nfc_read_buf() is called 7 times without any crash, the
> > kzalloc() call returns 0xe9e6c600 (virtual address) / 0x29e6c600
> > (physical address)
> > - the eight time meson_nfc_read_buf() is called kzalloc() call returns
> > 0xee39a38b (virtual address) / 0x2e39a38b (physical address) and the
> > final kfree() crashes
> > - changing the size in the kzalloc() call from PER_INFO_BYTE (= 8) to
> > PAGE_SIZE works around that crash
>
> I suspect you're doing something which corrupts memory.  Overrunning
> the end of your allocation or something similar.  Have you tried KASAN
> or even the various slab debugging (eg redzones)?
KASAN is not available on 32-bit ARM. there was some progress last
year [0] but it didn't make it into mainline. I tried to make the
patches apply again and got it to compile (and my kernel is still
booting) but I have no idea if it's still working. for anyone
interested, my patches are here: [1] (I consider this a HACK because I
don't know anything about the code which is being touched in the
patches, I only made it compile)

SLAB debugging (redzones) were a great hint, thank you very much for
that Matthew! I enabled:
  CONFIG_SLUB_DEBUG=y
  CONFIG_SLUB_DEBUG_ON=y
and with that I now get "BUG kmalloc-64 (Not tainted): Redzone
overwritten" (a larger kernel log extract is attached).

I'm starting to wonder if the NAND controller (hardware) writes more
than 8 bytes.
some context: the "info" buffer allocated in meson_nfc_read_buf is
then passed to the NAND controller IP (after using dma_map_single).

Liang, how does the NAND controller know that it only has to send
PER_INFO_BYTE (= 8) bytes when called from meson_nfc_read_buf? all
other callers of meson_nfc_dma_buffer_setup (which passes the info
buffer to the hardware) are using (nand->ecc.steps * PER_INFO_BYTE)
bytes?


Regards
Martin


[0] https://lore.kernel.org/patchwork/cover/913212/
[1] https://github.com/xdarklight/linux/tree/arm-kasan-hack-v5.1-rc1
[    2.742070] meson_nfc_read_buf e95e7d00 0x295e7d00
[    2.742155] meson_nfc_read_buf e95e7d00 0x295e7d00
[    2.746056] meson_nfc_read_buf e95e62c0 0x295e62c0
[    2.750947] meson_nfc_read_buf e95e7d00 0x295e7d00
[    2.755530] =============================================================================
[    2.763673] BUG kmalloc-64 (Not tainted): Redzone overwritten
[    2.769392] -----------------------------------------------------------------------------
[    2.769392] 
[    2.779013] Disabling lock debugging due to kernel taint
[    2.784303] INFO: 0x(ptrval)-0x(ptrval). First byte 0xff instead of 0xcc
[    2.790982] INFO: Allocated in 0xffffffff age=4294937574 cpu=4294967295 pid=-1
[    2.798171]  0xffffffff
[    2.800598]  0xffffffff
[    2.803024]  0xffffffff
[    2.805451]  0xffffffff
[    2.807879]  0xffffffff
[    2.810306]  0xffffffff
[    2.812733]  0xffffffff
[    2.815160]  0xffffffff
[    2.817587]  0xffffffff
[    2.820014]  0xffffffff
[    2.822441]  0xffffffff
[    2.824869]  0xffffffff
[    2.827296]  0xffffffff
[    2.829722]  0xffffffff
[    2.832150]  0xffffffff
[    2.834577]  0xffffffff
[    2.837006] INFO: Freed in 0xffffffff age=4294937574 cpu=4294967295 pid=-1
[    2.843852]  0xffffffff
[    2.846279]  0xffffffff
[    2.848706]  0xffffffff
[    2.851133]  0xffffffff
[    2.853560]  0xffffffff
[    2.855987]  0xffffffff
[    2.858414]  0xffffffff
[    2.860842]  0xffffffff
[    2.863269]  0xffffffff
[    2.865696]  0xffffffff
[    2.868123]  0xffffffff
[    2.870550]  0xffffffff
[    2.872977]  0xffffffff
[    2.875404]  0xffffffff
[    2.877831]  0xffffffff
[    2.880258]  0xffffffff
[    2.882687] INFO: Slab 0x(ptrval) objects=25 used=4 fp=0x(ptrval) flags=0x10201
[    2.889968] INFO: Object 0x(ptrval) @offset=7424 fp=0x(ptrval)
[    2.889968] 
[    2.897251] Redzone (ptrval): cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
[    2.905917] Redzone (ptrval): cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
[    2.914585] Redzone (ptrval): cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
[    2.923253] Redzone (ptrval): cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
[    2.931922] Object (ptrval): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    2.940503] Object (ptrval): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    2.949085] Object (ptrval): ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff  ................
[    2.957666] Object (ptrval): ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff  ................
[    2.966248] Redzone (ptrval): ff ff ff ff                                      ....
[    2.973876] Padding (ptrval): ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff  ................
[    2.982544] Padding (ptrval): ff ff ff ff ff ff ff ff                          ........
[    2.990523] CPU: 1 PID: 1 Comm: swapper/0 Tainted: G    B             5.1.0-rc1-00088-g406014e081b4-dirty #4272
[    3.000574] Hardware name: Amlogic Meson platform
[    3.005269] [<c0311bb8>] (unwind_backtrace) from [<c030ca68>] (show_stack+0x10/0x14)
[    3.012976] [<c030ca68>] (show_stack) from [<c0ccba28>] (dump_stack+0xa4/0xb8)
[    3.020171] [<c0ccba28>] (dump_stack) from [<c0487fe0>] (check_bytes_and_report+0xcc/0x104)
[    3.028490] [<c0487fe0>] (check_bytes_and_report) from [<c04881d4>] (check_object+0x194/0x28c)
[    3.037072] [<c04881d4>] (check_object) from [<c048a658>] (free_debug_processing+0x12c/0x420)
[    3.045566] [<c048a658>] (free_debug_processing) from [<c048ac5c>] (__slab_free+0x310/0x4a0)
[    3.053974] [<c048ac5c>] (__slab_free) from [<c048b1c4>] (kfree+0x184/0x274)
[    3.060997] [<c048b1c4>] (kfree) from [<c08b861c>] (meson_nfc_exec_op+0x3b0/0x408)
[    3.068541] [<c08b861c>] (meson_nfc_exec_op) from [<c08a424c>] (nand_read_data_op+0xb8/0x154)
[    3.077034] [<c08a424c>] (nand_read_data_op) from [<c08ae394>] (nand_onfi_detect+0xdc/0x644)
[    3.085440] [<c08ae394>] (nand_onfi_detect) from [<c08aa4d0>] (nand_scan_with_ids+0x900/0x171c)
[    3.094111] [<c08aa4d0>] (nand_scan_with_ids) from [<c08b7a04>] (meson_nfc_probe+0x46c/0x694)
[    3.102606] [<c08b7a04>] (meson_nfc_probe) from [<c081f430>] (platform_drv_probe+0x48/0x98)
[    3.110924] [<c081f430>] (platform_drv_probe) from [<c081d4b8>] (really_probe+0x1e0/0x2cc)
[    3.119158] [<c081d4b8>] (really_probe) from [<c081d704>] (driver_probe_device+0x60/0x16c)
[    3.127393] [<c081d704>] (driver_probe_device) from [<c081d9b0>] (device_driver_attach+0x58/0x60)
[    3.136235] [<c081d9b0>] (device_driver_attach) from [<c081da10>] (__driver_attach+0x58/0xcc)
[    3.144734] [<c081da10>] (__driver_attach) from [<c081b87c>] (bus_for_each_dev+0x74/0xb4)
[    3.152879] [<c081b87c>] (bus_for_each_dev) from [<c081c8ec>] (bus_add_driver+0x1b8/0x1d8)
[    3.161113] [<c081c8ec>] (bus_add_driver) from [<c081e53c>] (driver_register+0x74/0x108)
[    3.169176] [<c081e53c>] (driver_register) from [<c0302f54>] (do_one_initcall+0x54/0x284)
[    3.177324] [<c0302f54>] (do_one_initcall) from [<c1001180>] (kernel_init_freeable+0x2d4/0x36c)
[    3.185991] [<c1001180>] (kernel_init_freeable) from [<c0ce2a38>] (kernel_init+0x8/0x110)
[    3.194139] [<c0ce2a38>] (kernel_init) from [<c03010f0>] (ret_from_fork+0x14/0x24)
[    3.201678] Exception stack(0xe983ffb0 to 0xe983fff8)
[    3.206707] ffa0:                                     00000000 00000000 00000000 00000000
[    3.214856] ffc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    3.223003] ffe0: 00000000 00000000 00000000 00000000 00000013 00000000
[    3.229591] FIX kmalloc-64: Restoring 0x(ptrval)-0x(ptrval)=0xcc
[    3.229591] 
[    3.237097] FIX kmalloc-64: Object at 0x(ptrval) not freed
[    3.242545] meson_nfc_read_buf e95e6400 0x295e6400
[    3.247278] =============================================================================
[    3.255421] BUG kmalloc-64 (Tainted: G    B            ): Redzone overwritten
[    3.262527] -----------------------------------------------------------------------------
[    3.262527] 
[    3.272151] INFO: 0x(ptrval)-0x(ptrval). First byte 0xff instead of 0xcc
[    3.278827] INFO: Allocated in 0xfedfffff age=4294937620 cpu=0 pid=27697
[    3.285499]  0xffef6f7f
[    3.287926]  0xffffffff
[    3.290353]  0xffffffef
[    3.292780]  0xdf777fef
[    3.295207]  0xffffffff
[    3.297636] INFO: Freed in 0x80840052 age=4294937617 cpu=0 pid=33554432
[    3.304223] INFO: Slab 0x(ptrval) objects=25 used=5 fp=0x(ptrval) flags=0x10201
[    3.311504] INFO: Object 0x(ptrval) @offset=1024 fp=0x(ptrval)
[    3.311504] 
[    3.318786] Redzone (ptrval): cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
[    3.327454] Redzone (ptrval): cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
[    3.336122] Redzone (ptrval): cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
[    3.344790] Redzone (ptrval): cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
[    3.353458] Object (ptrval): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    3.362040] Object (ptrval): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    3.370621] Object (ptrval): ff ff ff ff ff ff ff ff ff fd fb bf ff ff ff ff  ................
[    3.379203] Object (ptrval): ef ff f7 ff ff ff ff ff fb ff fe ff ff ff ff ff  ................
[    3.387784] Redzone (ptrval): ff ff ff ff                                      ....
[    3.395412] Padding (ptrval): 00 00 00 00 02 00 00 00 01 00 00 02 e0 8b ff ff  ................
[    3.404080] Padding (ptrval): 00 00 00 00 00 00 00 00                          ........
[    3.412057] CPU: 1 PID: 1 Comm: swapper/0 Tainted: G    B             5.1.0-rc1-00088-g406014e081b4-dirty #4272
[    3.422110] Hardware name: Amlogic Meson platform
[    3.426797] [<c0311bb8>] (unwind_backtrace) from [<c030ca68>] (show_stack+0x10/0x14)
[    3.434510] [<c030ca68>] (show_stack) from [<c0ccba28>] (dump_stack+0xa4/0xb8)
[    3.441705] [<c0ccba28>] (dump_stack) from [<c0487fe0>] (check_bytes_and_report+0xcc/0x104)
[    3.450026] [<c0487fe0>] (check_bytes_and_report) from [<c04881d4>] (check_object+0x194/0x28c)
[    3.458607] [<c04881d4>] (check_object) from [<c048a658>] (free_debug_processing+0x12c/0x420)
[    3.467102] [<c048a658>] (free_debug_processing) from [<c048ac5c>] (__slab_free+0x310/0x4a0)
[    3.475510] [<c048ac5c>] (__slab_free) from [<c048b1c4>] (kfree+0x184/0x274)
[    3.482531] [<c048b1c4>] (kfree) from [<c08b861c>] (meson_nfc_exec_op+0x3b0/0x408)
[    3.490074] [<c08b861c>] (meson_nfc_exec_op) from [<c08a424c>] (nand_read_data_op+0xb8/0x154)
[    3.498569] [<c08a424c>] (nand_read_data_op) from [<c08ae394>] (nand_onfi_detect+0xdc/0x644)
[    3.506976] [<c08ae394>] (nand_onfi_detect) from [<c08aa4d0>] (nand_scan_with_ids+0x900/0x171c)
[    3.515645] [<c08aa4d0>] (nand_scan_with_ids) from [<c08b7a04>] (meson_nfc_probe+0x46c/0x694)
[    3.524140] [<c08b7a04>] (meson_nfc_probe) from [<c081f430>] (platform_drv_probe+0x48/0x98)
[    3.532460] [<c081f430>] (platform_drv_probe) from [<c081d4b8>] (really_probe+0x1e0/0x2cc)
[    3.540695] [<c081d4b8>] (really_probe) from [<c081d704>] (driver_probe_device+0x60/0x16c)
[    3.548930] [<c081d704>] (driver_probe_device) from [<c081d9b0>] (device_driver_attach+0x58/0x60)
[    3.557771] [<c081d9b0>] (device_driver_attach) from [<c081da10>] (__driver_attach+0x58/0xcc)
[    3.566267] [<c081da10>] (__driver_attach) from [<c081b87c>] (bus_for_each_dev+0x74/0xb4)
[    3.574415] [<c081b87c>] (bus_for_each_dev) from [<c081c8ec>] (bus_add_driver+0x1b8/0x1d8)
[    3.582649] [<c081c8ec>] (bus_add_driver) from [<c081e53c>] (driver_register+0x74/0x108)
[    3.590711] [<c081e53c>] (driver_register) from [<c0302f54>] (do_one_initcall+0x54/0x284)
[    3.598859] [<c0302f54>] (do_one_initcall) from [<c1001180>] (kernel_init_freeable+0x2d4/0x36c)
[    3.607527] [<c1001180>] (kernel_init_freeable) from [<c0ce2a38>] (kernel_init+0x8/0x110)
[    3.615675] [<c0ce2a38>] (kernel_init) from [<c03010f0>] (ret_from_fork+0x14/0x24)
[    3.623214] Exception stack(0xe983ffb0 to 0xe983fff8)
[    3.628243] ffa0:                                     00000000 00000000 00000000 00000000
[    3.636392] ffc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    3.644539] ffe0: 00000000 00000000 00000000 00000000 00000013 00000000
[    3.651126] FIX kmalloc-64: Restoring 0x(ptrval)-0x(ptrval)=0xcc
[    3.651126] 
[    3.658617] FIX kmalloc-64: Object at 0x(ptrval) not freed
[    3.664070] meson_nfc_read_buf e95e62c0 0x295e62c0
[    3.668825] =============================================================================
[    3.676957] BUG kmalloc-64 (Tainted: G    B            ): Redzone overwritten
[    3.684064] -----------------------------------------------------------------------------
[    3.684064] 
[    3.693687] INFO: 0x(ptrval)-0x(ptrval). First byte 0x0 instead of 0xcc
[    3.700277] INFO: Freed in 0xfe55620 age=536841280 cpu=4294967263 pid=-1048577
[    3.707469] INFO: Slab 0x(ptrval) objects=25 used=6 fp=0x(ptrval) flags=0x10201
[    3.714750] INFO: Object 0x(ptrval) @offset=704 fp=0x(ptrval)
[    3.714750] 
[    3.721945] Redzone (ptrval): cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
[    3.730613] Redzone (ptrval): cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
[    3.739281] Redzone (ptrval): cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
[    3.747949] Redzone (ptrval): cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
[    3.756618] Object (ptrval): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    3.765199] Object (ptrval): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[    3.773781] Object (ptrval): ff ff ff ff ff ff ff ff ff bf ff ff 7f ff ff ff  ................
[    3.782362] Object (ptrval): ff ff ff ff ff ff ff ff ff ff df ff 2f ff ff ff  ............/...
[    3.790944] Redzone (ptrval): 00 00 00 00                                      ....
[    3.798572] Padding (ptrval): ff ff ff ff ff ff d7 fe ff ff ff ff ff ff ff ff  ................
[    3.807240] Padding (ptrval): db ff ff ff 5e 7b ff ff                          ....^{..
[    3.815217] CPU: 1 PID: 1 Comm: swapper/0 Tainted: G    B             5.1.0-rc1-00088-g406014e081b4-dirty #4272
[    3.825269] Hardware name: Amlogic Meson platform
[    3.829957] [<c0311bb8>] (unwind_backtrace) from [<c030ca68>] (show_stack+0x10/0x14)
[    3.837669] [<c030ca68>] (show_stack) from [<c0ccba28>] (dump_stack+0xa4/0xb8)
[    3.844865] [<c0ccba28>] (dump_stack) from [<c0487fe0>] (check_bytes_and_report+0xcc/0x104)
[    3.853186] [<c0487fe0>] (check_bytes_and_report) from [<c04881d4>] (check_object+0x194/0x28c)
[    3.861767] [<c04881d4>] (check_object) from [<c048a658>] (free_debug_processing+0x12c/0x420)
[    3.870262] [<c048a658>] (free_debug_processing) from [<c048ac5c>] (__slab_free+0x310/0x4a0)
[    3.878670] [<c048ac5c>] (__slab_free) from [<c048b1c4>] (kfree+0x184/0x274)
[    3.885691] [<c048b1c4>] (kfree) from [<c08b861c>] (meson_nfc_exec_op+0x3b0/0x408)
[    3.893233] [<c08b861c>] (meson_nfc_exec_op) from [<c08a424c>] (nand_read_data_op+0xb8/0x154)
[    3.901728] [<c08a424c>] (nand_read_data_op) from [<c08ae394>] (nand_onfi_detect+0xdc/0x644)
[    3.910135] [<c08ae394>] (nand_onfi_detect) from [<c08aa4d0>] (nand_scan_with_ids+0x900/0x171c)
[    3.918805] [<c08aa4d0>] (nand_scan_with_ids) from [<c08b7a04>] (meson_nfc_probe+0x46c/0x694)
[    3.927300] [<c08b7a04>] (meson_nfc_probe) from [<c081f430>] (platform_drv_probe+0x48/0x98)
[    3.935619] [<c081f430>] (platform_drv_probe) from [<c081d4b8>] (really_probe+0x1e0/0x2cc)
[    3.943854] [<c081d4b8>] (really_probe) from [<c081d704>] (driver_probe_device+0x60/0x16c)
[    3.952089] [<c081d704>] (driver_probe_device) from [<c081d9b0>] (device_driver_attach+0x58/0x60)
[    3.960931] [<c081d9b0>] (device_driver_attach) from [<c081da10>] (__driver_attach+0x58/0xcc)
[    3.969427] [<c081da10>] (__driver_attach) from [<c081b87c>] (bus_for_each_dev+0x74/0xb4)
[    3.977575] [<c081b87c>] (bus_for_each_dev) from [<c081c8ec>] (bus_add_driver+0x1b8/0x1d8)
[    3.985808] [<c081c8ec>] (bus_add_driver) from [<c081e53c>] (driver_register+0x74/0x108)
[    3.993871] [<c081e53c>] (driver_register) from [<c0302f54>] (do_one_initcall+0x54/0x284)
[    4.002019] [<c0302f54>] (do_one_initcall) from [<c1001180>] (kernel_init_freeable+0x2d4/0x36c)
[    4.010686] [<c1001180>] (kernel_init_freeable) from [<c0ce2a38>] (kernel_init+0x8/0x110)
[    4.018834] [<c0ce2a38>] (kernel_init) from [<c03010f0>] (ret_from_fork+0x14/0x24)
[    4.026373] Exception stack(0xe983ffb0 to 0xe983fff8)
[    4.031402] ffa0:                                     00000000 00000000 00000000 00000000
[    4.039552] ffc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    4.047699] ffe0: 00000000 00000000 00000000 00000000 00000013 00000000
[    4.054286] FIX kmalloc-64: Restoring 0x(ptrval)-0x(ptrval)=0xcc
[    4.054286] 
[    4.061773] FIX kmalloc-64: Object at 0x(ptrval) not freed
[    4.067212] Could not find a valid ONFI parameter page, trying bit-wise majority to recover it
[    4.075833] ONFI parameter recovery failed, aborting
[    4.080773] meson_nfc_read_buf e95e7bc0 0x295e7bc0
[    4.085578] meson_nfc_read_buf e95e7bc0 0x295e7bc0
[    4.090336] nand: device found, Manufacturer ID: 0xad, Chip ID: 0xde
[    4.096586] nand: Hynix NAND 8GiB 3,3V 8-bit
[    4.100847] nand: 8192 MiB, MLC, erase size: 4096 KiB, page size: 16384, OOB size: 1280
[    4.108873] meson_nfc_read_buf e95e7bc0 0x295e7bc0
[    4.116115] Unable to handle kernel paging request at virtual address fffffffe
[    4.120770] pgd = (ptrval)
[    4.123457] [fffffffe] *pgd=2bfde861, *pte=00000000, *ppte=00000000
[    4.129703] Internal error: Oops: 80000007 [#1] PREEMPT SMP ARM
[    4.135593] Modules linked in:
[    4.138630] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G    B             5.1.0-rc1-00088-g406014e081b4-dirty #4272
[    4.148681] Hardware name: Amlogic Meson platform
[    4.153364] PC is at 0xfffffffe
[    4.156491] LR is at __handle_irq_event_percpu+0x7c/0x2c4
[    4.161858] pc : [<fffffffe>]    lr : [<c037c878>]    psr: 600001b3
[    4.168099] sp : c1101e48  ip : ea001ee8  fp : c11c32a0
[    4.173300] r10: c11c32b4  r9 : c1101f10  r8 : c1101e90
[    4.178501] r7 : 00000033  r6 : 00000000  r5 : e9a566a8  r4 : e95e4f40
[    4.185002] r3 : ffffffff  r2 : c1108cb4  r1 : ffffffff  r0 : 00000033
[    4.191505] Flags: nZCv  IRQs off  FIQs on  Mode SVC_32  ISA Thumb  Segment none
[    4.198872] Control: 10c5387d  Table: 0020404a  DAC: 00000051
[    4.204592] Process swapper/0 (pid: 0, stack limit = 0x(ptrval))
[    4.210573] Stack: (0xc1101e48 to 0xc1102000)
[    4.214910] 1e40:                   00000080 c11c3264 eaf86680 c11c32b4 ffffe000 e9a56640
[    4.223059] 1e60: c1108cb4 c11c2d03 eaf85580 c1108c88 e9a566a8 e9a56640 00000001 00000000
[    4.231207] 1e80: c1101f10 c021f540 c0f40060 c037caec 00000000 5b1da9e9 e9a56640 e9a566a8
[    4.239355] 1ea0: c11093a0 c037cb78 e9a56640 e9a566a8 c11093a0 c0380d90 c108d1b4 00000000
[    4.247503] 1ec0: 00000033 c037ba34 c108d1b4 c037c014 c11093a0 c11579c8 f080210c f0802100
[    4.255651] 1ee0: c1101f10 f0803100 c108c970 c06fe26c c030946c 60000013 ffffffff c1101f44
[    4.263799] 1f00: c1108c88 c1100000 c108c970 c0301a8c 00000000 0000a974 eaf8ade0 c031aee0
[    4.271948] 1f20: ffffe000 c1108cb4 c1108cf8 00000001 c1108c88 00000000 c108c970 c0f40060
[    4.280096] 1f40: c1108d9c c1101f60 c0309468 c030946c 60000013 ffffffff 00000051 00000000
[    4.288244] 1f60: ffffe000 c0356de4 00000000 c1108c88 00000041 5b1da9e9 c1112210 000000c9
[    4.296392] 1f80: 00000001 ffffffff c11d7640 c1108c88 00000041 c11d7640 c106da40 c0357168
[    4.304540] 1fa0: c11d7698 c1000e80 ffffffff ffffffff 00000000 c1000584 00000000 ebfffd00
[    4.312688] 1fc0: 00000000 c106da40 5b18a8e9 00000000 00000000 c1000330 00000051 10c0387d
[    4.320836] 1fe0: 00000f81 1f164000 414fc091 10c5387d 00000000 00000000 00000000 00000000
[    4.328989] [<c037c878>] (__handle_irq_event_percpu) from [<c037caec>] (handle_irq_event_percpu+0x2c/0x80)
[    4.338608] [<c037caec>] (handle_irq_event_percpu) from [<c037cb78>] (handle_irq_event+0x38/0x5c)
[    4.347451] [<c037cb78>] (handle_irq_event) from [<c0380d90>] (handle_fasteoi_irq+0xcc/0x17c)
[    4.355943] [<c0380d90>] (handle_fasteoi_irq) from [<c037ba34>] (generic_handle_irq+0x24/0x34)
[    4.364525] [<c037ba34>] (generic_handle_irq) from [<c037c014>] (__handle_domain_irq+0x7c/0xec)
[    4.373196] [<c037c014>] (__handle_domain_irq) from [<c06fe26c>] (gic_handle_irq+0x4c/0x90)
[    4.381515] [<c06fe26c>] (gic_handle_irq) from [<c0301a8c>] (__irq_svc+0x6c/0xa8)
[    4.388966] Exception stack(0xc1101f10 to 0xc1101f58)
[    4.393995] 1f00:                                     00000000 0000a974 eaf8ade0 c031aee0
[    4.402145] 1f20: ffffe000 c1108cb4 c1108cf8 00000001 c1108c88 00000000 c108c970 c0f40060
[    4.410292] 1f40: c1108d9c c1101f60 c0309468 c030946c 60000013 ffffffff
[    4.416883] [<c0301a8c>] (__irq_svc) from [<c030946c>] (arch_cpu_idle+0x38/0x3c)
[    4.424252] [<c030946c>] (arch_cpu_idle) from [<c0356de4>] (do_idle+0x1e4/0x290)
[    4.431618] [<c0356de4>] (do_idle) from [<c0357168>] (cpu_startup_entry+0x18/0x1c)
[    4.439158] [<c0357168>] (cpu_startup_entry) from [<c1000e80>] (start_kernel+0x45c/0x488)
[    4.447305] [<c1000e80>] (start_kernel) from [<00000000>] (  (null))
[    4.453631] Code: bad PC value
[    4.456674] ---[ end trace eaad995c3018501e ]---
[    4.461259] Kernel panic - not syncing: Fatal exception in interrupt
[    4.467592] CPU3: stopping
[    4.470277] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G    B D           5.1.0-rc1-00088-g406014e081b4-dirty #4272
[    4.480328] Hardware name: Amlogic Meson platform
[    4.485017] [<c0311bb8>] (unwind_backtrace) from [<c030ca68>] (show_stack+0x10/0x14)
[    4.492729] [<c030ca68>] (show_stack) from [<c0ccba28>] (dump_stack+0xa4/0xb8)
[    4.499924] [<c0ccba28>] (dump_stack) from [<c03100d4>] (handle_IPI+0x418/0x444)
[    4.507292] [<c03100d4>] (handle_IPI) from [<c06fe2ac>] (gic_handle_irq+0x8c/0x90)
[    4.514832] [<c06fe2ac>] (gic_handle_irq) from [<c0301a8c>] (__irq_svc+0x6c/0xa8)
[    4.522283] Exception stack(0xe987df60 to 0xe987dfa8)
[    4.527315] df60: 00000000 00003658 eafc0de0 c031aee0 ffffe000 c1108cb4 c1108cf8 00000008
[    4.535462] df80: c1108c88 00000000 c108c970 c0f40060 00000001 e987dfb0 c0309468 c030946c
[    4.543607] dfa0: 600c0013 ffffffff
[    4.547079] [<c0301a8c>] (__irq_svc) from [<c030946c>] (arch_cpu_idle+0x38/0x3c)
[    4.554447] [<c030946c>] (arch_cpu_idle) from [<c0356de4>] (do_idle+0x1e4/0x290)
[    4.561814] [<c0356de4>] (do_idle) from [<c0357168>] (cpu_startup_entry+0x18/0x1c)
[    4.569355] [<c0357168>] (cpu_startup_entry) from [<003026ac>] (0x3026ac)
[    4.576113] CPU1: stopping
[    4.578803] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G    B D           5.1.0-rc1-00088-g406014e081b4-dirty #4272
[    4.588855] Hardware name: Amlogic Meson platform
[    4.593543] [<c0311bb8>] (unwind_backtrace) from [<c030ca68>] (show_stack+0x10/0x14)
[    4.601254] [<c030ca68>] (show_stack) from [<c0ccba28>] (dump_stack+0xa4/0xb8)
[    4.608449] [<c0ccba28>] (dump_stack) from [<c03100d4>] (handle_IPI+0x418/0x444)
[    4.615817] [<c03100d4>] (handle_IPI) from [<c06fe2ac>] (gic_handle_irq+0x8c/0x90)
[    4.623358] [<c06fe2ac>] (gic_handle_irq) from [<c0301a8c>] (__irq_svc+0x6c/0xa8)
[    4.630809] Exception stack(0xe9877f60 to 0xe9877fa8)
[    4.635841] 7f60: 00000000 00005464 eaf9cde0 c031aee0 ffffe000 c1108cb4 c1108cf8 00000002
[    4.643989] 7f80: c1108c88 00000000 c108c970 c0f40060 00000001 e9877fb0 c0309468 c030946c
[    4.652133] 7fa0: 600c0013 ffffffff
[    4.655605] [<c0301a8c>] (__irq_svc) from [<c030946c>] (arch_cpu_idle+0x38/0x3c)
[    4.662973] [<c030946c>] (arch_cpu_idle) from [<c0356de4>] (do_idle+0x1e4/0x290)
[    4.670341] [<c0356de4>] (do_idle) from [<c0357168>] (cpu_startup_entry+0x18/0x1c)
[    4.677881] [<c0357168>] (cpu_startup_entry) from [<003026ac>] (0x3026ac)
[    4.684640] CPU2: stopping
[    4.687329] CPU: 2 PID: 0 Comm: swapper/2 Tainted: G    B D           5.1.0-rc1-00088-g406014e081b4-dirty #4272
[    4.697381] Hardware name: Amlogic Meson platform
[    4.702069] [<c0311bb8>] (unwind_backtrace) from [<c030ca68>] (show_stack+0x10/0x14)
[    4.709781] [<c030ca68>] (show_stack) from [<c0ccba28>] (dump_stack+0xa4/0xb8)
[    4.716975] [<c0ccba28>] (dump_stack) from [<c03100d4>] (handle_IPI+0x418/0x444)
[    4.724344] [<c03100d4>] (handle_IPI) from [<c06fe2ac>] (gic_handle_irq+0x8c/0x90)
[    4.731884] [<c06fe2ac>] (gic_handle_irq) from [<c0301a8c>] (__irq_svc+0x6c/0xa8)
[    4.739336] Exception stack(0xe987bf60 to 0xe987bfa8)
[    4.744367] bf60: 00000000 00009844 eafaede0 c031aee0 ffffe000 c1108cb4 c1108cf8 00000004
[    4.752515] bf80: c1108c88 00000000 c108c970 c0f40060 eafaab34 e987bfb0 c0309468 c030946c
[    4.760660] bfa0: 600c0013 ffffffff
[    4.764132] [<c0301a8c>] (__irq_svc) from [<c030946c>] (arch_cpu_idle+0x38/0x3c)
[    4.771499] [<c030946c>] (arch_cpu_idle) from [<c0356de4>] (do_idle+0x1e4/0x290)
[    4.778867] [<c0356de4>] (do_idle) from [<c0357168>] (cpu_startup_entry+0x18/0x1c)
[    4.786408] [<c0357168>] (cpu_startup_entry) from [<003026ac>] (0x3026ac)
[    4.793171] ---[ end Kernel panic - not syncing: Fatal exception in interrupt ]---
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