Not tainted Error from kernel and rebooting

[vinothkumars]

Hi All,

I am working IMX8QM Custom Board with Android 9 Automotive. I got following kernel hang randomly let me know what is the issue.

vendor/nxp-opensource/kernel_imx/fs/ext4/inode.c:3908 ext4_set_page_dirty+0x54/0x70
[ 261.450068] Modules linked in: imx_rpmsg_tty usb_storage ci_hdrc_imx ci_hdrc usbmisc_imx mx8_bt_rfkill imx_dpu_render imx_dpu_blit imx_dpu_crtc imx_dpu_core imx8_dprc imx8_prg imx8_pc
[ 261.466450] CPU: 2 PID: 7959 Comm: Binder:5914_F Not tainted 4.14.98-00006-g5f4394a-dirty #3
[ 261.474885] Hardware name: Freescale i.MX8QM MEK (DT)
[ 261.479936] task: ffff8000533ef080 task.stack: ffff000011508000
[ 261.485862] PC is at ext4_set_page_dirty+0x54/0x70
[ 261.490661] LR is at set_page_dirty+0x5c/0xd8
[ 261.495021] pc : [<ffff0000082f6fc4>] lr : [<ffff0000081cb9d4>] pstate: 60000145
[ 261.502419] sp : ffff00001150b9c0
[ 261.505736] x29: ffff00001150b9c0 x28: ffff00001150bb90
[ 261.511061] x27: 0000000012e00000 x26: 00e00000839f2bd3
[ 261.516387] x25: ffff80005436c2e0 x24: 0000000000000000
[ 261.521712] x23: ffff7e00000e7c80 x22: ffff80005706f800
[ 261.527038] x21: ffff00001150bac8 x20: ffff0000082f6f70
[ 261.532363] x19: ffff7e00000e7c80 x18: 0000000000000000
[ 261.537688] x17: 0000000000000030 x16: ffff000008250804
[ 261.543005] x15: 0000000000000000 x14: 0000000000000010
[ 261.548330] x13: 000000000000af80 x12: ffff800063f0bb88
[ 261.553656] x11: 0000000000000000 x10: 0000000000000000
[ 261.558981] x9 : 0000000000000140 x8 : 000080005afd5000
[ 261.564307] x7 : 00000000131c0000 x6 : 0000000012e00000
[ 261.569632] x5 : 0000000012d00000 x4 : ffff80005436c2e0
[ 261.574958] x3 : 00000000000839f2 x2 : 0000000000000000
[ 261.580283] x1 : 000000000000102c x0 : ffff7e00000e7c80
[ 261.585616]
[ 261.585616] X4: 0xffff80005436c260:
[ 261.590586] c260 00000000 00000000 5feaf800 ffff8000 00000f92 04600000 00000070 00000000
[ 261.598795] c280 b2933f48 0000e05f 00000000 00000000 00000000 00000000 00000000 00000000
[ 261.607005] c2a0 5436c2a0 ffff8000 5436c2a0 ffff8000 00000000 00000000 00000000 00000000
[ 261.615215] c2c0 05faef8b 0000000e 00000000 00000000 00000000 00000000 00000000 00000000
[ 261.623424] c2e0 12c00000 00000000 131c0000 00000000 5436c398 ffff8000 00000000 00000000
[ 261.631634] c300 5436c3b9 ffff8000 00000000 00000000 00000000 00000000 12c00000 00000000
[ 261.639844] c320 5ba91500 ffff8000 00000fd3 00600000 00100073 00000000 5ba1e280 ffff8000
[ 261.648053] c340 00000000 00000000 00000000 00000000 000005bf 00000000 5ad9ebd0 ffff8000
[ 261.656269]
[ 261.656269] X12: 0xffff800063f0bb08:
[ 261.661328] bb08 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 261.669538] bb28 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 261.677747] bb48 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 261.685957] bb68 00000000 00000000 00000000 00000001 00000055 000000ba 0000001f 00000000
[ 261.694166] bb88 015c1aa0 ffff7e00 0159dbe0 ffff7e00 00c09120 ffff7e00 00afc260 ffff7e00
[ 261.702376] bba8 63f0bba8 ffff8000 63f0bba8 ffff8000 1d00001e 00000000 00100300 00000000
[ 261.710586] bbc8 fffffed6 00000000 5665db00 ffff8000 00010782 00000000 01599740 ffff7e00
[ 261.718795] bbe8 016df2c0 ffff7e00 527c73c8 ffff8000 00205d42 00000000 0149f1c0 ffff7e00
[ 261.727015]
[ 261.727015] X22: 0xffff80005706f780:
[ 261.732070] f780 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 261.740280] f7a0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 261.748489] f7c0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 261.756699] f7e0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 261.764909] f800 00000000 00000000 b52a9bd3 00e00000 b1fefbd3 00e00000 b4bb1bd3 00e00000
[ 261.773119] f820 aac26bd3 00e00000 adf9ebd3 00e00000 a9487bd3 00e00000 ab701bd3 00e00000
[ 261.781328] f840 bc5f0bd3 00e00000 bc5f3bd3 00e00000 af313bd3 00e00000 a235cbd3 00e00000
[ 261.789538] f860 ab44dbd3 00e00000 c6cb3bd3 00e00000 ba003bd3 00e00000 bbbe7bd3 00e00000
[ 261.797751]
[ 261.797751] X25: 0xffff80005436c260:
[ 261.802804] c260 00000000 00000000 5feaf800 ffff8000 00000f92 04600000 00000070 00000000
[ 261.811014] c280 b2933f48 0000e05f 00000000 00000000 00000000 00000000 00000000 00000000
[ 261.819223] c2a0 5436c2a0 ffff8000 5436c2a0 ffff8000 00000000 00000000 00000000 00000000
[ 261.827433] c2c0 05faef8b 0000000e 00000000 00000000 00000000 00000000 00000000 00000000
[ 261.835643] c2e0 12c00000 00000000 131c0000 00000000 5436c398 ffff8000 00000000 00000000
[ 261.843852] c300 5436c3b9 ffff8000 00000000 00000000 00000000 00000000 12c00000 00000000
[ 261.852062] c320 5ba91500 ffff8000 00000fd3 00600000 00100073 00000000 5ba1e280 ffff8000
[ 261.860272] c340 00000000 00000000 00000000 00000000 000005bf 00000000 5ad9ebd0 ffff8000
[ 261.868486]
[ 261.869979] Call trace:
[ 261.872433] Exception stack(0xffff00001150b880 to 0xffff00001150b9c0)
[ 261.878881] b880: ffff7e00000e7c80 000000000000102c 0000000000000000 00000000000839f2
[ 261.886722] b8a0: ffff80005436c2e0 0000000012d00000 0000000012e00000 00000000131c0000
[ 261.894560] b8c0: 000080005afd5000 0000000000000140 0000000000000000 0000000000000000
[ 261.902396] b8e0: ffff800063f0bb88 000000000000af80 0000000000000010 0000000000000000
[ 261.910230] b900: ffff000008250804 0000000000000030 0000000000000000 ffff7e00000e7c80
[ 261.918069] b920: ffff0000082f6f70 ffff00001150bac8 ffff80005706f800 ffff7e00000e7c80
[ 261.925904] b940: 0000000000000000 ffff80005436c2e0 00e00000839f2bd3 0000000012e00000
[ 261.933741] b960: ffff00001150bb90 ffff00001150b9c0 ffff0000081cb9d4 ffff00001150b9c0
[ 261.941577] b980: ffff0000082f6fc4 0000000060000145 ffff00001150ba98 ffff000008f27018
[ 261.949413] b9a0: 0000ffffffffffff ffff0000081d0844 ffff00001150b9c0 ffff0000082f6fc4
[ 261.957245] [<ffff0000082f6fc4>] ext4_set_page_dirty+0x54/0x70
[ 261.963081] [<ffff0000081cb9d4>] set_page_dirty+0x5c/0xd8
[ 261.968481] [<ffff0000081fba68>] unmap_page_range+0x508/0x838
[ 261.974229] [<ffff0000081fbde8>] unmap_single_vma+0x50/0xa4
[ 261.979805] [<ffff0000081fc1e0>] unmap_vmas+0x58/0xc4
[ 261.984865] [<ffff0000082051d4>] exit_mmap+0xcc/0x1b8
[ 261.989926] [<ffff0000080abaa0>] mmput+0x58/0x11c
[ 261.994644] [<ffff00000824f658>] flush_old_exec+0x2c8/0x64c
[ 262.000228] [<ffff0000082acf7c>] load_elf_binary+0x358/0x123c
[ 262.005985] [<ffff00000824fb04>] search_binary_handler+0x128/0x200
[ 262.012172] [<ffff00000825046c>] do_execveat_common.isra.41+0x4fc/0x6bc
[ 262.018791] [<ffff000008250838>] SyS_execve+0x34/0x40
[ 262.023845] Exception stack(0xffff00001150bec0 to 0xffff00001150c000)
[ 262.030293] bec0: 0000e05fb31a5ba8 0000e05fb3095d20 0000000000000000 0000e05fb3095e60
[ 262.038129] bee0: 0000e05fb3095f04 0000000000000000 0000000000000000 0000000000000031
[ 262.045964] bf00: 00000000000000dd 00000000fffffff0 0000000000000028 00000000fffffff0
[ 262.053802] bf20: 0000000000000000 0000e05fb31a44c2 0000e05fb3095cf1 0000000000000000
[ 262.061638] bf40: 0000000000000030 0000000000000030 0000000000000000 0000e05f8cefd588
[ 262.069474] bf60: 0000e05fb3095d50 000000000000000a 00000000ffffffff 0000e05f8cefd588
[ 262.077310] bf80: 0000e05fb3095ed8 000000000000125c 0000000000000016 0000000000000000
[ 262.085146] bfa0: 0000e05f8cefd588 0000e05fb3095d90 0000e05fb3179928 0000e05fb3095d20
[ 262.092982] bfc0: 0000e05fb3180a58 00000000a0000000 0000e05fb31a5ba8 00000000000000dd
[ 262.100816] bfe0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[ 262.108658] [<ffff000008083ac0>] el0_svc_naked+0x34/0x38
[ 262.113976] ---[ end trace c3eb91ff5caf1be6 ]---
[ 262.433120] type=1400 audit(1620843345.964:142): avc: denied { dac_read_search } for pid=7882 comm="main" capability=2 scontext=u:r:zygote:s0 tcontext=u:r:zygote:s0 tclass=capability permissive=1
[ 262.450687] type=1400 audit(1620843353.076:143): avc: denied { open } for pid=7960 comm="crash_dump64" path="/data/system_ce/0/accounts_ce.db-shm" dev="mmcblk0p14" ino=262494 scontext=u:r:crash_dump:s0 tcontext=u:object_r:system_data_file:s0 tclass=file permissive=1
[ 262.825454] BUG: Bad page map in process Binder:5914_F pte:e00000839f2bd3 pmd:d7f9f003
[ 262.825530] init: Untracked pid 7960 exited with status 0
[ 262.833491] page:ffff7e00000e7c80 count:2 mapcount:-1 mapping:ffff80005d570f20 index:0x128
[ 262.847205] flags: 0x107c(referenced|uptodate|dirty|lru|active|private)
[ 262.853854] raw: 000000000000107c ffff80005d570f20 0000000000000128 00000002fffffffe
[ 262.861641] raw: ffff7e00001c0d20 ffff7e0000c3c560 ffff80005dc1d208 ffff80005e018800
[ 262.869409] page dumped because: bad pte
[ 262.873347] page->mem_cgroup:ffff80005e018800
[ 262.877724] addr:0000000012d00000 vm_flags:00100073 anon_vma:ffff800053b2ec08 mapping:ffff8000534ffae8 index:100
[ 262.887929] file:dev/ashmem/dalvik-main space (region space) fault: (null) mmap:shmem_mmap readpage: (null)
[ 262.899267] CPU: 3 PID: 7962 Comm: Binder:5914_F Tainted: G W 4.14.98-00006-g5f4394a-dirty #3
[ 262.908926] Hardware name: Freescale i.MX8QM MEK (DT)
[ 262.913984] Call trace:
[ 262.916442] [<ffff00000808b198>] dump_backtrace+0x0/0x414
[ 262.921850] [<ffff00000808b5c0>] show_stack+0x14/0x1c
[ 262.926919] [<ffff000008a88088>] dump_stack+0x90/0xb0
[ 262.931982] [<ffff0000081f95d4>] print_bad_pte+0x170/0x208
[ 262.937478] [<ffff0000081fbb40>] unmap_page_range+0x5e0/0x838
[ 262.943227] [<ffff0000081fbde8>] unmap_single_vma+0x50/0xa4
[ 262.948804] [<ffff0000081fc1e0>] unmap_vmas+0x58/0xc4
[ 262.953861] [<ffff0000082051d4>] exit_mmap+0xcc/0x1b8
[ 262.958929] [<ffff0000080abaa0>] mmput+0x58/0x11c
[ 262.963648] [<ffff0000080b3ba8>] do_exit+0x260/0x9dc
[ 262.968623] [<ffff0000080b4390>] do_group_exit+0x3c/0x98
[ 262.973941] [<ffff0000080b43fc>] __wake_up_parent+0x0/0x28
[ 262.979437] Exception stack(0xffff000010f23ec0 to 0xffff000010f24000)

[igorpadykov]

Hi Vinothkumar

for custom board hanging first may be recommended to run ddr test and rebuild all

image from scratch using ddr settings found from ddr test

https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/i-MX-8-8X-Family-DDR-Tools-Release/ta-p/...

Best regards
igor

[vinothkumars]

Thank you Igor for the reply.

I done everything as per the document. These observation we got one of the custom board not in all board.