Re: BUG: KASAN: global-out-of-bounds in soc_device_match on arm
From: Vignesh Raghavendra
Date: Wed Nov 11 2020 - 02:55:37 EST
Hi Naresh,
On 11/11/20 12:08 PM, Stephen Rothwell wrote:
> Hi Naresh,
>
> On Wed, 11 Nov 2020 11:55:46 +0530 Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> wrote:
>>
>> The following kernel warning noticed on arm KASAN enabled config while
>> booting on
>> TI beagleboard x15 device.
>>
>> [ 32.127451] BUG: KASAN: global-out-of-bounds in soc_device_match+0x64/0xe4
>> [ 32.127485] Read of size 4 at addr c21701f8 by task swapper/0/1
>> [ 32.127508]
>> [ 32.127549] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G W
>> 5.10.0-rc3-next-20201110 #2
>> [ 32.127577] Hardware name: Generic DRA74X (Flattened Device Tree)
>> [ 32.127604] Backtrace:
>> [ 32.127670] [<c199f710>] (dump_backtrace) from [<c199fb94>]
>> (show_stack+0x20/0x24)
>> [ 32.127717] r9:00000080 r8:c4208000 r7:c3023060 r6:40000093
>> r5:00000000 r4:c3023060
>> [ 32.127766] [<c199fb74>] (show_stack) from [<c19a7ad0>]
>> (dump_stack+0xe8/0x10c)
>> [ 32.127824] [<c19a79e8>] (dump_stack) from [<c05e0290>]
>> (print_address_description.constprop.0+0x3c/0x4b0)
>> [ 32.127871] r10:00000030 r9:c5da4010 r8:c5da4000 r7:00000000
>> r6:c0fd5c20 r5:eebf33c0
>> [ 32.127903] r4:c21701f8 r3:eebf33c4
>> [ 32.127958] [<c05e0254>] (print_address_description.constprop.0)
>> from [<c05e0920>] (kasan_report+0x160/0x17c)
>> [ 32.128000] r8:c5da4000 r7:00000000 r6:c0fd5c20 r5:00000001 r4:c21701f8
>> [ 32.128053] [<c05e07c0>] (kasan_report) from [<c05e0c68>]
>> (__asan_load4+0x6c/0x9c)
>> [ 32.128093] r7:c3c3ede0 r6:c354dea0 r5:c0fd5b88 r4:c21701f8
>> [ 32.128144] [<c05e0bfc>] (__asan_load4) from [<c0fd5c20>]
>> (soc_device_match+0x64/0xe4)
>> [ 32.128197] [<c0fd5bbc>] (soc_device_match) from [<c0e2b4a8>]
>> (omap8250_probe+0x628/0x75c)
>> [ 32.128236] r7:b7841730 r6:c6db2c4e r5:00000001 r4:c6db2c40
>> [ 32.128290] [<c0e2ae80>] (omap8250_probe) from [<c0f9889c>]
>> (platform_drv_probe+0x70/0xc8)
>> [ 32.128335] r10:c5da4044 r9:c5da4048 r8:c34ff834 r7:c3c3e240
>> r6:c34ff834 r5:00000000
>> [ 32.128363] r4:c5da4010
>> [ 32.128413] [<c0f9882c>] (platform_drv_probe) from [<c0f94924>]
>> (really_probe+0x184/0x72c)
>> [ 32.128452] r7:c3c3e240 r6:00000000 r5:c3c3e1c0 r4:c5da4010
>> [ 32.128499] [<c0f947a0>] (really_probe) from [<c0f9515c>]
>> (driver_probe_device+0xa4/0x270)
>> [ 32.128544] r10:c34ff834 r9:c416fa58 r8:c379e840 r7:c5d75a00
>> r6:c5da4034 r5:c37c01c0
>> [ 32.128572] r4:c5da4010
>> [ 32.128620] [<c0f950b8>] (driver_probe_device) from [<c0f956ac>]
>> (device_driver_attach+0x94/0x9c)
>> [ 32.128665] r10:00000000 r9:c416fa58 r8:c0f956b4 r7:c5d75a00
>> r6:c5da4034 r5:c34ff834
>> [ 32.128693] r4:c5da4010
>> [ 32.128741] [<c0f95618>] (device_driver_attach) from [<c0f95798>]
>> (__driver_attach+0xe4/0x19c)
>> [ 32.128780] r7:c34ff834 r6:c5da4010 r5:c34ff834 r4:00000000
>> [ 32.128826] [<c0f956b4>] (__driver_attach) from [<c0f917e4>]
>> (bus_for_each_dev+0x100/0x154)
>> [ 32.128865] r7:c34ff834 r6:b78417a4 r5:c420bd40 r4:c5d75a34
>> [ 32.128910] [<c0f916e4>] (bus_for_each_dev) from [<c0f93f28>]
>> (driver_attach+0x38/0x3c)
>> [ 32.128955] r9:c34ff87c r8:c416fa00 r7:c3541a70 r6:c3541a20
>> r5:c6db4f00 r4:c34ff834
>> [ 32.129001] [<c0f93ef0>] (driver_attach) from [<c0f93470>]
>> (bus_add_driver+0x21c/0x2dc)
>> [ 32.129034] r5:c6db4f00 r4:c34ff834
>> [ 32.129080] [<c0f93254>] (bus_add_driver) from [<c0f96874>]
>> (driver_register+0xdc/0x1b0)
>> [ 32.129125] r10:00000000 r9:c2b00468 r8:c378a0c0 r7:c2170360
>> r6:c34ff838 r5:c3541a20
>> [ 32.129153] r4:c34ff834
>> [ 32.129202] [<c0f96798>] (driver_register) from [<c0f987c8>]
>> (__platform_driver_register+0x7c/0x84)
>> [ 32.129241] r7:ffffc000 r6:c2bc509c r5:00000000 r4:c34ff820
>> [ 32.129300] [<c0f9874c>] (__platform_driver_register) from
>> [<c2bc50c0>] (omap8250_platform_driver_init+0x24/0x28)
>> [ 32.129333] r5:c420bf20 r4:b78417d0
>> [ 32.129387] [<c2bc509c>] (omap8250_platform_driver_init) from
>> [<c030370c>] (do_one_initcall+0xc4/0x400)
>> [ 32.129437] [<c0303648>] (do_one_initcall) from [<c2b015e8>]
>> (kernel_init_freeable+0x214/0x268)
>> [ 32.129482] r10:c2d128a8 r9:c2b00468 r8:c2c50834 r7:c2c50854
>> r6:c2a55ac8 r5:00000007
>> [ 32.129511] r4:c425a700
>> [ 32.129563] [<c2b013d4>] (kernel_init_freeable) from [<c19bfd1c>]
>> (kernel_init+0x18/0x140)
>> [ 32.129607] r10:00000000 r9:00000000 r8:00000000 r7:00000000
>> r6:00000000 r5:c19bfd04
>> [ 32.129635] r4:00000000
>> [ 32.129684] [<c19bfd04>] (kernel_init) from [<c030017c>]
>> (ret_from_fork+0x14/0x38)
>> [ 32.129715] Exception stack(0xc420bfb0 to 0xc420bff8)
>> [ 32.129753] bfa0: 00000000
>> 00000000 00000000 00000000
>> [ 32.129798] bfc0: 00000000 00000000 00000000 00000000 00000000
>> 00000000 00000000 00000000
>> [ 32.129839] bfe0: 00000000 00000000 00000000 00000000 00000013 00000000
>> [ 32.129872] r5:c19bfd04 r4:00000000
>> [ 32.129894]
>> [ 32.129917] The buggy address belongs to the variable:
>> [ 32.129957] k3_soc_devices+0x38/0x1e0
>> [ 32.129981] The buggy address belongs to the page:
>> [ 32.130018] page:(ptrval) refcount:1 mapcount:0 mapping:00000000
>> index:0x0 pfn:0x82170
>> [ 32.130051] flags: 0x1000(reserved)
>> [ 32.130104] raw: 00001000 eebf33c4 eebf33c4 00000000 00000000
>> 00000000 ffffffff 00000001
>> [ 32.130133] raw: 00000000
>> [ 32.130159] page dumped because: kasan: bad access detected
>> [ 32.130182]
>> [ 32.130205] Memory state around the buggy address:
>> [ 32.130239] c2170080: 00 00 f9 f9 f9 f9 f9 f9 00 00 00 00 00 05 f9 f9
>> [ 32.130272] c2170100: f9 f9 f9 f9 00 00 00 00 00 01 f9 f9 f9 f9 f9 f9
>> [ 32.130306] >c2170180: 00 02 f9 f9 f9 f9 f9 f9 00 00 00 00 00 00 00 f9
>> [ 32.130331] ^
>> [ 32.130364] c2170200: f9 f9 f9 f9 00 00 00 06 f9 f9 f9 f9 00 00 00 02
>> [ 32.130397] c2170280: f9 f9 f9 f9 00 00 00 00 02 f9 f9 f9 f9 f9 f9 f9
>> [ 32.130422] ==================================================================
>> [ 32.130446] Disabling lock debugging due to kernel taint
>>
>> metadata:
>> git branch: master
>> git repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next
>> git describe: next-20201110
>> make_kernelversion: 5.10.0-rc3
>> build : https://builds.tuxbuild.com/1k5bYasxkHF7omMh7mjtxjRtkMe/
>>
>> Full log:
>> https://lkft.validation.linaro.org/scheduler/job/1927838#L2190
>>
>> --
>> Linaro LKFT
>> https://lkft.linaro.org
>
> Presumably caused by commit
>
> 439c7183e5b9 ("serial: 8250: 8250_omap: Disable RX interrupt after DMA enable")
>
> from the tty tree.
>
Oops, I forgot to add a sentinel entry for k3_soc_devices[].
Thanks for the catching the bug! Will send a fix soon with your
Reported-by..
Regards
Vignesh