AM6412: 复制超过300M文件时，kernel dump

[   67.927754] =============================================================================
[   67.935944] BUG kmalloc-256 (Not tainted): objects 21 > max 0
[   67.941676] -----------------------------------------------------------------------------
[   67.941676] 
[   67.951306] Disabling lock debugging due to kernel taint
[   67.956609] INFO: Slab 0x00000000c49ddadd objects=21 used=21 fp=0x0000000000000000 flags=0x10200
[   67.965380] CPU: 1 PID: 1652 Comm: cp Tainted: G    B             5.10.168-g2c23e6c538 #5
[   67.973538] Hardware name: Texas Instruments AM642 EVM (DT)
[   67.979097] Call trace:
[   67.981551]  dump_backtrace+0x0/0x1b0
[   67.985207]  show_stack+0x18/0x38
[   67.988518]  dump_stack+0xe8/0x124
[   67.991912]  slab_err+0xac/0xd4
[   67.995050]  check_slab+0xe8/0xf0
[   67.998358]  alloc_debug_processing+0x60/0x1a0
[   68.002794]  ___slab_alloc.constprop.0+0x6c0/0x788
[   68.007574]  __slab_alloc.isra.0.constprop.0+0x2c/0x58
[   68.012700]  __kmalloc+0x5f8/0x6a0
[   68.016098]  iter_file_splice_write+0x74/0x388
[   68.020530]  direct_splice_actor+0x30/0x48
[   68.024617]  splice_direct_to_actor+0x108/0x258
[   68.029137]  do_splice_direct+0x8c/0xe8
[   68.032967]  do_sendfile+0x198/0x4b0
[   68.036534]  __arm64_sys_sendfile64+0x194/0x1a0
[   68.041056]  el0_svc_common.constprop.0+0x78/0x1c8
[   68.045836]  do_el0_svc+0x24/0xa0
[   68.049147]  el0_svc+0x14/0x20
[   68.052194]  el0_sync_handler+0xb0/0xb8
[   68.056021]  el0_sync+0x180/0x1c0
[   68.059329] FIX kmalloc-256: Marking all objects used
[   68.318152] Unable to handle kernel paging request at virtual address ffff8000111d02a0
[   68.326084] Mem abort info:
[   68.328882]   ESR = 0x96000047
[   68.331938]   EC = 0x25: DABT (current EL), IL = 32 bits
[   68.337244]   SET = 0, FnV = 0
[   68.340296]   EA = 0, S1PTW = 0
[   68.343434] Data abort info:
[   68.346306]   ISV = 0, ISS = 0x00000047
[   68.350138]   CM = 0, WnR = 1
[   68.353107] swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000083134000
[   68.359799] [ffff8000111d02a0] pgd=00000000fffff003, p4d=00000000fffff003, pud=00000000ffffe003, pmd=00000000ffffc003, pte=0000000000000000
[   68.372322] Internal error: Oops: 96000047 [#1] PREEMPT SMP
[   68.377881] Modules linked in:
[   68.380935] CPU: 0 PID: 1688 Comm: sleep Tainted: G    B             5.10.168-g2c23e6c538 #5
[   68.389353] Hardware name: Texas Instruments AM642 EVM (DT)
[   68.394915] pstate: 80000005 (Nzcv daif -PAN -UAO -TCO BTYPE=--)
[   68.400921] pc : queued_spin_lock_slowpath+0x200/0x3a8
[   68.406051] lr : _raw_spin_lock+0x74/0x80
[   68.410049] sp : ffff80001195bb10
[   68.413352] x29: ffff80001195bb10 x28: ffff80001195bce8 
[   68.418656] x27: ffff000006b2cd70 x26: 0000000000401000 
[   68.423959] x25: ffff0000059d3010 x24: ffff80001195bc38 
[   68.429262] x23: 00000000004ba000 x22: 0000000000000000 
[   68.434566] x21: 0000000000000000 x20: fffffe0000041328 
[   68.439869] x19: ffff00000904c000 x18: 0000000000000000 
[   68.445172] x17: 0000000000000000 x16: 0000000000000000 
[   68.450475] x15: 0000000000000000 x14: 0000000000000000 
[   68.455778] x13: 0000000000000000 x12: 0000000000000000 
[   68.461080] x11: 0000000000000000 x10: 0000000000040000 
[   68.466383] x9 : 0000000000000000 x8 : ffff00007fbdc280 
[   68.471686] x7 : ffff00000416ad40 x6 : ffff8000111d0280 
[   68.476989] x5 : ffff00007fbdc280 x4 : 0000000000000000 
[   68.482292] x3 : fffffe0000041328 x2 : ffff8000111d02a0 
[   68.487595] x1 : ffff8000111d02a0 x0 : ffff00007fbdc288 
[   68.492899] Call trace:
[   68.495341]  queued_spin_lock_slowpath+0x200/0x3a8
[   68.500120]  _raw_spin_lock+0x74/0x80
[   68.503777]  unmap_page_range+0x28c/0x838
[   68.507775]  unmap_single_vma+0x4c/0xa8
[   68.511601]  unmap_vmas+0x30/0x70
[   68.514909]  exit_mmap+0xc0/0x178
[   68.518219]  mmput+0x90/0x178
[   68.521180]  do_exit+0x29c/0xa28
[   68.524399]  do_group_exit+0x44/0xa0
[   68.527965]  __wake_up_parent+0x0/0x30
[   68.531707]  el0_svc_common.constprop.0+0x78/0x1c8
[   68.536487]  do_el0_svc+0x24/0xa0
[   68.539796]  el0_svc+0x14/0x20
[   68.542843]  el0_sync_handler+0xb0/0xb8
[   68.546671]  el0_sync+0x180/0x1c0
[   68.549981] Code: 91002100 8b0200c2 f861d884 aa0203e1 (f8246828) 
[   68.556065] ---[ end trace 14fe0e7332c0f17b ]---
[   68.560705] note: sleep[1688] exited with preempt_count 1
[   68.566181] Unable to handle kernel paging request at virtual address ffff8000111d02a0
[   68.574093] Mem abort info:
[   68.576886]   ESR = 0x96000047
[   68.579939]   EC = 0x25: DABT (current EL), IL = 32 bits
[   68.585245]   SET = 0, FnV = 0
[   68.588297]   EA = 0, S1PTW = 0
[   68.591435] Data abort info:
[   68.594306]   ISV = 0, ISS = 0x00000047
[   68.598137]   CM = 0, WnR = 1
[   68.601104] swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000083134000
[   68.607798] [ffff8000111d02a0] pgd=00000000fffff003, p4d=00000000fffff003, pud=00000000ffffe003, pmd=00000000ffffc003, pte=0000000000000000
[   68.620314] Internal error: Oops: 96000047 [#2] PREEMPT SMP
[   68.625871] Modules linked in:
[   68.628923] CPU: 0 PID: 1694 Comm: sleep Tainted: G    B D           5.10.168-g2c23e6c538 #5
[   68.637340] Hardware name: Texas Instruments AM642 EVM (DT)
[   68.642899] pstate: 00000005 (nzcv daif -PAN -UAO -TCO BTYPE=--)
[   68.648896] pc : queued_spin_lock_slowpath+0x200/0x3a8
[   68.654023] lr : _raw_spin_lock+0x74/0x80
[   68.658019] sp : ffff800011c6bb10
[   68.661323] x29: ffff800011c6bb10 x28: ffff800011c6bce8 
[   68.666627] x27: ffff000005938008 x26: 0000000000401000 
[   68.671930] x25: ffff000004d52010 x24: ffff800011c6bc38 
[   68.677233] x23: 00000000004ba000 x22: 0000000000000000 
[   68.682536] x21: 0000000000000000 x20: fffffdfffffc7928 
[   68.687839] x19: ffff0000071e4000 x18: 0000000000000000 
[   68.693142] x17: 0000000000000000 x16: 0000000000000000 
[   68.698445] x15: 0000000000000000 x14: 0000000000000000 
[   68.703748] x13: 0000000000000000 x12: 0000000000000000 
[   68.709050] x11: 0000000000000000 x10: 0000000000050000 
[   68.714353] x9 : 0000000000000010 x8 : ffff00007fbdc290 
[   68.719657] x7 : ffff00000688e940 x6 : ffff8000111d0280 
[   68.724959] x5 : ffff00007fbdc280 x4 : 0000000000000000 
[   68.730262] x3 : fffffdfffffc7928 x2 : ffff8000111d02a0 
[   68.735565] x1 : ffff8000111d02a0 x0 : ffff00007fbdc298 
[   68.740868] Call trace:
[   68.743309]  queued_spin_lock_slowpath+0x200/0x3a8
[   68.748088]  _raw_spin_lock+0x74/0x80
[   68.751742]  unmap_page_range+0x28c/0x838
[   68.755741]  unmap_single_vma+0x4c/0xa8
[   68.759567]  unmap_vmas+0x30/0x70
[   68.762874]  exit_mmap+0xc0/0x178
[   68.766182]  mmput+0x90/0x178
[   68.769142]  do_exit+0x29c/0xa28
[   68.772361]  do_group_exit+0x44/0xa0
[   68.775927]  __wake_up_parent+0x0/0x30
[   68.779668]  el0_svc_common.constprop.0+0x78/0x1c8
[   68.784448]  do_el0_svc+0x24/0xa0
[   68.787756]  el0_svc+0x14/0x20
[   68.790803]  el0_sync_handler+0xb0/0xb8
[   68.794629]  el0_sync+0x180/0x1c0
[   68.797938] Code: 91002100 8b0200c2 f861d884 aa0203e1 (f8246828) 
[   68.804018] ---[ end trace 14fe0e7332c0f17c ]---
[   68.808643] note: sleep[1694] exited with preempt_count 1
[   68.814071] Unable to handle kernel paging request at virtual address 40a1134a824fecea
[   68.821968] Mem abort info:
[   68.824752]   ESR = 0x96000004
[   68.827796]   EC = 0x25: DABT (current EL), IL = 32 bits
[   68.833093]   SET = 0, FnV = 0
[   68.836137]   EA = 0, S1PTW = 0
[   68.839267] Data abort info:
[   68.842137]   ISV = 0, ISS = 0x00000004
[   68.845959]   CM = 0, WnR = 0
[   68.848917] [40a1134a824fecea] address between user and kernel address ranges
[   68.856036] Internal error: Oops: 96000004 [#3] PREEMPT SMP
[   68.861592] Modules linked in:
[   68.864642] CPU: 0 PID: 291 Comm: dlt_housekeeper Tainted: G    B D           5.10.168-g2c23e6c538 #5
[   68.873840] Hardware name: Texas Instruments AM642 EVM (DT)
[   68.879399] pstate: 00000085 (nzcv daIf -PAN -UAO -TCO BTYPE=--)
[   68.885397] pc : ___slab_alloc.constprop.0+0x11c/0x788
[   68.890524] lr : ___slab_alloc.constprop.0+0xf0/0x788
[   68.895560] sp : ffff800012253bb0
[   68.898864] x29: ffff800012253bb0 x28: 0000000000000000 
[   68.904168] x27: ffff000000081480 x26: ffff000000083e80 
[   68.909472] x25: 0000000000000000 x24: 40a1134a824fece3 
[   68.914775] x23: dead000000000100 x22: ffff000000083e90 
[   68.920078] x21: ffff00007fbdf8e0 x20: 0000000000000cc0 
[   68.925381] x19: ffff00000688ad40 x18: 0000000000000000 
[   68.930684] x17: 0000000000000000 x16: 0000000000000000 
[   68.935987] x15: 0000000000000000 x14: 0000000000000000 
[   68.941290] x13: 0000000000000000 x12: 0000000000000000 
[   68.946593] x11: 40a1134a824feceb x10: 0000000000000000 
[   68.951896] x9 : 0000000000000000 x8 : 0000000000000000 
[   68.957199] x7 : 0000000000000000 x6 : 0000000000000000 
[   68.962502] x5 : fffffe0000043800 x4 : 0000000000000000 
[   68.967804] x3 : ffff000000083e80 x2 : 0000000000000001 
[   68.973106] x1 : 40a1134a824feceb x0 : 40a1134a824fecea 
[   68.978409] Call trace:
[   68.980850]  ___slab_alloc.constprop.0+0x11c/0x788
[   68.985632]  __slab_alloc.isra.0.constprop.0+0x2c/0x58
[   68.990760]  kmem_cache_alloc+0x5cc/0x660
[   68.994762]  getname_flags+0x34/0x178
[   68.998414]  getname+0x18/0x28
[   69.001463]  do_sys_openat2+0x188/0x2c8
[   69.005290]  do_sys_open+0x58/0xa0
[   69.008684]  __arm64_sys_openat+0x24/0x30
[   69.012686]  el0_svc_common.constprop.0+0x78/0x1c8
[   69.017465]  do_el0_svc+0x24/0xa0
[   69.020772]  el0_svc+0x14/0x20
[   69.023819]  el0_sync_handler+0xb0/0xb8
[   69.027646]  el0_sync+0x180/0x1c0
[   69.030954] Code: 52800019 d1000420 f240003f 9a851000 (f9400000) 
[   69.037033] ---[ end trace 14fe0e7332c0f17d ]---
[   69.041638] note: dlt_housekeeper[291] exited with preempt_count 1
[   69.279054] Unable to handle kernel paging request at virtual address 6adfa5bf6d2d6204
[   69.286960] Mem abort info:
[   69.289744]   ESR = 0x96000004
[   69.292790]   EC = 0x25: DABT (current EL), IL = 32 bits
[   69.298087]   SET = 0, FnV = 0
[   69.301131]   EA = 0, S1PTW = 0
[   69.304260] Data abort info:
[   69.307130]   ISV = 0, ISS = 0x00000004
[   69.310954]   CM = 0, WnR = 0
[   69.313912] [6adfa5bf6d2d6204] address between user and kernel address ranges
[   69.321030] Internal error: Oops: 96000004 [#4] PREEMPT SMP
[   69.326587] Modules linked in:
[   69.329638] CPU: 0 PID: 291 Comm: dlt_housekeeper Tainted: G    B D           5.10.168-g2c23e6c538 #5
[   69.338835] Hardware name: Texas Instruments AM642 EVM (DT)
[   69.344394] pstate: 00000085 (nzcv daIf -PAN -UAO -TCO BTYPE=--)
[   69.350395] pc : try_grab_compound_head+0x178/0x288
[   69.355262] lr : internal_get_user_pages_fast+0x3ec/0x840
[   69.360645] sp : ffff8000122534a0
[   69.363949] x29: ffff8000122534a0 x28: ffff000003f05d98 
[   69.369253] x27: 0000ffffb6794000 x26: 0000000084ffd003 
[   69.374556] x25: 0000ffffb6795000 x24: ffff800011078ae0 
[   69.379860] x23: 00e8000087ee3f43 x22: ffff000004ffdca0 
[   69.385163] x21: fffffdffffffb8c0 x20: 0000000000000001 
[   69.390466] x19: 0000ffffb6794000 x18: 0000000000000000 
[   69.395768] x17: 0000000000000000 x16: 0000000000000000 
[   69.401071] x15: 00000194087a360f x14: 0000000000000352 
[   69.406374] x13: 0000000000000352 x12: 0000000000000000 
[   69.411677] x11: 000000000000b83c x10: 00000000000009f0 
[   69.416980] x9 : ffff800012253700 x8 : 0000000000000001 
[   69.422283] x7 : 0000000000000000 x6 : 0000000000000000 
[   69.427585] x5 : ffff800012253630 x4 : 6adfa5bf6d2d61d0 
[   69.432888] x3 : 0000000000000041 x2 : 0000000000000005 
[   69.438190] x1 : 0000000000000001 x0 : 6adfa5bf6d2d61d1 
[   69.443493] Call trace:
[   69.445934]  try_grab_compound_head+0x178/0x288
[   69.450456]  internal_get_user_pages_fast+0x3ec/0x840
[   69.455496]  get_user_pages_fast+0x30/0x48
[   69.459585]  get_futex_key+0xac/0x4b8
[   69.463239]  futex_wake+0x58/0x198
[   69.466632]  do_futex+0x1b4/0xb60
[   69.469940]  mm_release+0xc8/0x110
[   69.473334]  exit_mm_release+0x28/0x38
[   69.477075]  do_exit+0x64c/0xa28
[   69.480294]  make_task_dead+0x50/0x80
[   69.483950]  die+0x200/0x240
[   69.486825]  die_kernel_fault+0x64/0x78
[   69.490651]  __do_kernel_fault+0x74/0x148
[   69.494651]  do_bad_area+0x5c/0x68
[   69.498045]  do_translation_fault+0x38/0x68
[   69.502218]  do_mem_abort+0x40/0xa0
[   69.505699]  el1_abort+0x48/0x70
[   69.508920]  el1_sync_handler+0xac/0xc8
[   69.512745]  el1_sync+0x88/0x140
[   69.515967]  ___slab_alloc.constprop.0+0x11c/0x788
[   69.520748]  __slab_alloc.isra.0.constprop.0+0x2c/0x58
[   69.525875]  kmem_cache_alloc+0x5cc/0x660
[   69.529876]  getname_flags+0x34/0x178
[   69.533527]  getname+0x18/0x28
[   69.536576]  do_sys_openat2+0x188/0x2c8
[   69.540403]  do_sys_open+0x58/0xa0
[   69.543797]  __arm64_sys_openat+0x24/0x30
[   69.547798]  el0_svc_common.constprop.0+0x78/0x1c8
[   69.552577]  do_el0_svc+0x24/0xa0
[   69.555884]  el0_svc+0x14/0x20
[   69.558931]  el0_sync_handler+0xb0/0xb8
[   69.562757]  el0_sync+0x180/0x1c0
[   69.566066] Code: f9400400 d1000404 f240001f 9a951084 (b9403480) 
[   69.572148] ---[ end trace 14fe0e7332c0f17e ]---
[   69.576751] Fixing recursive fault but reboot is needed!
[   69.582332] Unable to handle kernel paging request at virtual address ffff8000111d0290
[   69.590255] Mem abort info:
[   69.593051]   ESR = 0x96000047
[   69.596104]   EC = 0x25: DABT (current EL), IL = 32 bits
[   69.601410]   SET = 0, FnV = 0
[   69.604463]   EA = 0, S1PTW = 0
[   69.607601] Data abort info:
[   69.610472]   ISV = 0, ISS = 0x00000047
[   69.614303]   CM = 0, WnR = 1
[   69.617271] swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000083134000
[   69.623965] [ffff8000111d0290] pgd=00000000fffff003, p4d=00000000fffff003, pud=00000000ffffe003, pmd=00000000ffffc003, pte=0000000000000000
[   69.636484] Internal error: Oops: 96000047 [#5] PREEMPT SMP
[   69.642041] Modules linked in:
[   69.645092] CPU: 0 PID: 1432 Comm: agetty Tainted: G    B D           5.10.168-g2c23e6c538 #5
[   69.653596] Hardware name: Texas Instruments AM642 EVM (DT)
[   69.659156] pstate: 80000005 (Nzcv daif -PAN -UAO -TCO BTYPE=--)
[   69.665157] pc : queued_spin_lock_slowpath+0x200/0x3a8
[   69.670285] lr : _raw_spin_lock+0x74/0x80
[   69.674282] sp : ffff800011c93b10
[   69.677586] x29: ffff800011c93b10 x28: ffff800011c93ce8 
[   69.682889] x27: ffff0000072a7428 x26: 0000000000401000 
[   69.688193] x25: ffff000008e80010 x24: ffff800011c93c38 
[   69.693496] x23: 000000000040d000 x22: 0000000000000000 
[   69.698799] x21: 0000000000000000 x20: fffffdfffff618a8 
[   69.704102] x19: ffff000005862000 x18: 0000000000000000 
[   69.709405] x17: 0000000000000000 x16: 0000000000000000 
[   69.714707] x15: 0000000000000000 x14: 0000000000000000 
[   69.720010] x13: 0000000000000000 x12: 0000000000000000 
[   69.725312] x11: 0000000000000000 x10: 0000000000060000 
[   69.730615] x9 : 0000000000000020 x8 : ffff00007fbdc2a0 
[   69.735919] x7 : ffff000006889e40 x6 : ffff8000111d0280 
[   69.741221] x5 : ffff00007fbdc280 x4 : 0000000000000000 
[   69.746523] x3 : fffffdfffff618a8 x2 : ffff8000111d0290 
[   69.751826] x1 : ffff8000111d0290 x0 : ffff00007fbdc2a8 
[   69.757128] Call trace:
[   69.759570]  queued_spin_lock_slowpath+0x200/0x3a8
[   69.764349]  _raw_spin_lock+0x74/0x80
[   69.768003]  unmap_page_range+0x28c/0x838
[   69.772003]  unmap_single_vma+0x4c/0xa8
[   69.775828]  unmap_vmas+0x30/0x70
[   69.779136]  exit_mmap+0xc0/0x178
[   69.782444]  mmput+0x90/0x178
[   69.785403]  do_exit+0x29c/0xa28
[   69.788622]  do_group_exit+0x44/0xa0
[   69.792188]  __wake_up_parent+0x0/0x30
[   69.795930]  el0_svc_common.constprop.0+0x78/0x1c8
[   69.800710]  do_el0_svc+0x24/0xa0
[   69.804017]  el0_svc+0x14/0x20
[   69.807063]  el0_sync_handler+0xb0/0xb8
[   69.810888]  el0_sync+0x180/0x1c0
[   69.814196] Code: 91002100 8b0200c2 f861d884 aa0203e1 (f8246828) 
[   69.820277] ---[ end trace 14fe0e7332c0f17f ]---
[   69.824893] note: agetty[1432] exited with preempt_count 1
[   69.842984] Fixing recursive fault but reboot is needed!
[   69.848301] Fixing recursive fault but reboot is needed!
[   70.086980] Fixing recursive fault but reboot is needed!
[   75.882006] Unable to handle kernel paging request at virtual address 24e8a8642edcc042
[   75.889917] Mem abort info:
[   75.892702]   ESR = 0x96000004
[   75.895748]   EC = 0x25: DABT (current EL), IL = 32 bits
[   75.901045]   SET = 0, FnV = 0
[   75.904089]   EA = 0, S1PTW = 0
[   75.907219] Data abort info:
[   75.910089]   ISV = 0, ISS = 0x00000004
[   75.913912]   CM = 0, WnR = 0
[   75.916870] [24e8a8642edcc042] address between user and kernel address ranges
[   75.923989] Internal error: Oops: 96000004 [#6] PREEMPT SMP
[   75.929546] Modules linked in:
[   75.932600] CPU: 0 PID: 196 Comm: timesync Tainted: G    B D           5.10.168-g2c23e6c538 #5
[   75.941191] Hardware name: Texas Instruments AM642 EVM (DT)
[   75.946752] pstate: 00000085 (nzcv daIf -PAN -UAO -TCO BTYPE=--)
[   75.952754] pc : ___slab_alloc.constprop.0+0x11c/0x788
[   75.957882] lr : ___slab_alloc.constprop.0+0xf0/0x788
[   75.962918] sp : ffff8000115cbb80
[   75.966222] x29: ffff8000115cbb80 x28: 0000000000000000 
[   75.971526] x27: ffff000000003a80 x26: ffff000000000500 
[   75.976829] x25: 0000000000000000 x24: 24e8a8642edcc03b 
[   75.982132] x23: dead000000000100 x22: ffff000000000510 
[   75.987435] x21: ffff00007fbde900 x20: 0000000000002a20 
[   75.992738] x19: ffff000004e70040 x18: 0000000000000000 
[   75.998041] x17: 0000000000000000 x16: 0000000000000000 
[   76.003343] x15: 0000000000000000 x14: 0000000000000000 
[   76.008646] x13: 0000000000000000 x12: 0000000000000000 
[   76.013949] x11: 24e8a8642edcc043 x10: ffff800011440a90 
[   76.019252] x9 : ffff800011440a88 x8 : ffff000000401c60 
[   76.024555] x7 : 0000000000000000 x6 : 0000000000000000 
[   76.029858] x5 : fffffdfffff6aa00 x4 : 0000000000000000 
[   76.035161] x3 : ffff000000000500 x2 : 0000000000000001 
[   76.040463] x1 : 24e8a8642edcc043 x0 : 24e8a8642edcc042 
[   76.045765] Call trace:
[   76.048207]  ___slab_alloc.constprop.0+0x11c/0x788
[   76.052989]  __slab_alloc.isra.0.constprop.0+0x2c/0x58
[   76.058116]  __kmalloc+0x5f8/0x6a0
[   76.061513]  __tty_buffer_request_room+0x78/0x150
[   76.066208]  __tty_insert_flip_char+0x2c/0x88
[   76.070557]  uart_insert_char+0x80/0x150
[   76.074472]  serial8250_read_char+0x7c/0x1b0
[   76.078732]  serial8250_rx_chars+0x2c/0x80
[   76.082821]  serial8250_handle_irq.part.0+0x154/0x1a0
[   76.087861]  serial8250_handle_irq+0x1c/0x28
[   76.092120]  omap8250_irq+0x174/0x370
[   76.095776]  __handle_irq_event_percpu+0x54/0x178
[   76.100469]  handle_irq_event_percpu+0x34/0x90
[   76.104901]  handle_irq_event+0x48/0x90
[   76.108729]  handle_fasteoi_irq+0xb8/0x170
[   76.112814]  generic_handle_irq+0x30/0x48
[   76.116813]  __handle_domain_irq+0x64/0xc0
[   76.120902]  gic_handle_irq+0x58/0x128
[   76.124642]  el0_irq_naked+0x4c/0x54
[   76.128211] Code: 52800019 d1000420 f240003f 9a851000 (f9400000) 
[   76.134300] ---[ end trace 14fe0e7332c0f180 ]---
[   76.138905] Kernel panic - not syncing: Oops: Fatal exception in interrupt
[   76.145765] SMP: stopping secondary CPUs
[   77.255136] SMP: failed to stop secondary CPUs 0-1
[   77.259915] Kernel Offset: disabled
[   77.263394] CPU features: 0x00040002,2000200c
[   77.267738] Memory Limit: none
[   77.270788] ---[ end Kernel panic - not syncing: Oops: Fatal exception in interrupt ]---