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SubjectRe: next: kasan: Unable to handle kernel paging request at virtual address
On Wed, May 08, 2024 at 04:59:10PM +0530, Naresh Kamboju wrote:
> While running kunit tests on arm64 and x86_64 the following kernel BUG
> noticed on running Linux next-20240508 kernel and stride tests failed.
>
> observations:
> 1) The null pointer dereference notice while running kunit_test
> 2) The stride test case failed on today's linux next-20240508 tag.
>
> The detailed log provided in the links below.
>
> Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
>
> Crash log:
> --------
>
> <6>[ 43.086497] KTAP version 1
> <6>[ 43.087004] # Subtest: kunit_fault
> <6>[ 43.087577] # module: kunit_test
> <6>[ 43.087748] 1..1
> <1>[ 43.092588] Unable to handle kernel paging request at virtual
> address dfff800000000000
> <1>[ 43.093687] KASAN: null-ptr-deref in range
> [0x0000000000000000-0x0000000000000007]
> <1>[ 43.094770] Mem abort info:
> <1>[ 43.095425] ESR = 0x0000000096000005
> <1>[ 43.097071] EC = 0x25: DABT (current EL), IL = 32 bits
> <1>[ 43.098034] SET = 0, FnV = 0
> <1>[ 43.098542] EA = 0, S1PTW = 0
> <1>[ 43.099104] FSC = 0x05: level 1 translation fault
> <1>[ 43.099837] Data abort info:
> <1>[ 43.100679] ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
> <1>[ 43.101535] CM = 0, WnR = 0, TnD = 0, TagAccess = 0
> <1>[ 43.102321] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
> <1>[ 43.103287] [dfff800000000000] address between user and kernel
> address ranges
> <0>[ 43.105111] Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP
> <4>[ 43.106046] Modules linked in:
> <4>[ 43.108961] CPU: 1 PID: 375 Comm: kunit_try_catch Tainted: G
> N 6.9.0-rc7-next-20240508 #1
> <4>[ 43.110433] Hardware name: linux,dummy-virt (DT)
> <4>[ 43.111555] pstate: 82400009 (Nzcv daif +PAN -UAO +TCO -DIT
> -SSBS BTYPE=--)
> <4>[ 43.113232] pc : kunit_test_null_dereference+0x2c/0x114
^^^^^^^^^^^^^^^^^^^^^^^^^^^
This function is supposed to dereference a NULL pointer.

regards,
dan carpenter


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