Linux 6.15-rc1 regression, folio/ubifs Oops

From: Francesco Dolcini
Date: Tue Apr 08 2025 - 04:22:10 EST

Hello all,
I do have the following regression on single core system using UBIFS,
dual core seems not affected, any idea?

[ 1.003798] 8<--- cut here ---
[ 1.003843] Unable to handle kernel paging request at virtual address d21af3b8 when read
[ 1.003876] [d21af3b8] *pgd=00000000
[ 1.003914] Internal error: Oops: 5 [#1] SMP ARM
[ 1.023282] Modules linked in:
[ 1.026371] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.15.0-rc1-0.0.0-devel #1 PREEMPT
[ 1.035110] Hardware name: Freescale i.MX7 Dual (Device Tree)
[ 1.040881] PC is at scomp_acomp_comp_decomp+0x138/0x390
[ 1.046243] LR is at scomp_acomp_decompress+0x10/0x48
[ 1.051336] pc : [<c050aa90>] lr : [<c050b07c>] psr: 20000013
[ 1.057634] sp : d0825a98 ip : 00000024 fp : c221d780
[ 1.062886] r10: 00000576 r9 : d0825af0 r8 : c204e030
[ 1.068137] r7 : cfdaf3b8 r6 : cfdaf3b8 r5 : c27b2540 r4 : cfd5b1e8
[ 1.074694] r3 : 02400000 r2 : 00001000 r1 : d0b01000 r0 : 00000000
[ 1.081251] Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
[ 1.088419] Control: 10c5387d Table: 8000406a DAC: 00000051
[ 1.094189] Register r0 information: NULL pointer
[ 1.098929] Register r1 information: 16-page vmalloc region starting at 0xd0b01000 allocated at crypto_scomp_init_tfm+0x8c/0x180
[ 1.110556] Register r2 information: non-paged memory
[ 1.115641] Register r3 information: non-paged memory
[ 1.120726] Register r4 information: non-slab/vmalloc memory
[ 1.126421] Register r5 information: slab kmalloc-192 start c27b2540 pointer offset 0 size 192
[ 1.135112] Register r6 information: non-slab/vmalloc memory
[ 1.140806] Register r7 information: non-slab/vmalloc memory
[ 1.146500] Register r8 information: slab kmalloc-8k start c204e000 pointer offset 48 size 8192
[ 1.155280] Register r9 information: 2-page vmalloc region starting at 0xd0824000 allocated at kernel_clone+0xa4/0x33c
[ 1.166043] Register r10 information: non-paged memory
[ 1.171219] Register r11 information: slab kmalloc-64 start c221d780 pointer offset 0 size 64
[ 1.179827] Register r12 information: non-paged memory
[ 1.185003] Process swapper/0 (pid: 1, stack limit = 0x(ptrval))
[ 1.191043] Stack: (0xd0825a98 to 0xd0826000)
[ 1.195431] 5a80: 00000004 c07edfcc
[ 1.203650] 5aa0: 00000000 00000000 00001000 c7d16f8f 04070598 c27b2540 c27b2540 c28b0000
[ 1.211870] 5ac0: d0825c94 c0dc7064 d0825af0 c204e030 d0825c94 c050b07c c27b2540 00000576
[ 1.220089] 5ae0: c28b0000 c04d40b8 00000000 c07ebbd0 00000000 00000000 d0825af8 d0825af8
[ 1.228308] 5b00: 00000000 c7d16f8f c28b0000 c117b6d0 00000000 c204e030 cfdaf3b8 c43f7080
[ 1.236527] 5b20: d0825b40 c04d47e0 d0825c94 c0dc7064 00000576 c2213cc0 0000f598 000005a6
[ 1.244745] 5b40: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1.252963] 5b60: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1.261182] 5b80: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1.269400] 5ba0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1.277618] 5bc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1.285837] 5be0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1.294056] 5c00: c28b0000 c04c5e54 00000001 00000000 00000001 c289eb00 000009e4 20000000
[ 1.302275] 5c20: 00000000 000002b0 0000f598 000005a6 c204e000 c7d16f8f cfd5fec0 00000000
[ 1.310494] 5c40: 00000000 cfdaf3b8 00000000 00000000 c43f7080 c204e000 00001000 c04b58b4
[ 1.318713] 5c60: 00000000 d0825c94 00000001 c7d16f8f d0825d50 c7d16f8f 00040cc0 00000016
[ 1.326932] 5c80: c28b0000 00000000 00015600 c2068000 cfdaf3b8 00001000 000009e4 20000000
[ 1.335151] 5ca0: 00000001 c7d16f8f 0eced000 cfdaf3b8 c28b0000 00000000 c27fc0c0 c43f7080
[ 1.343370] 5cc0: 00000000 c43f7180 c27fc0c0 c04b60e4 00000000 ffffffff 00000000 c02a0430
[ 1.351590] 5ce0: 00000cc0 00000001 ffffc005 00000001 d0825d50 00000000 c2068000 c7d16f8f
[ 1.359809] 5d00: c43f7184 cfdaf3b8 00000000 c2068000 c27fc0c0 c43f7180 c2068000 c43f7180
[ 1.368028] 5d20: c27fc0c0 c029e91c 00000000 c02ae4d8 00000000 00000000 c2068000 c43f7180
[ 1.376247] 5d40: c27fc0c0 c7d16f8f d0825d50 d0825ef0 00000000 d0825e14 cfdaf3b8 c43f7180
[ 1.384466] 5d60: c2068000 c43f7180 c27fc0c0 c02a0c5c 0eced000 00000000 00000001 00000000
[ 1.392685] 5d80: c43f7190 00000000 00000100 c2068000 00000001 c2014800 c27fc0c0 c43f7180
[ 1.400904] 5da0: c27fc120 00000000 00000000 00000000 00000000 00000000 000001ff c7d16f8f
[ 1.409123] 5dc0: c2952fb8 00000000 d0825ed8 c43f7080 00000000 00000000 ffffffff ffffffff
[ 1.417342] 5de0: d0825ef0 c02a10f4 00000000 d0825ed8 c289f000 beffffd4 00050003 c43f7080
[ 1.425561] 5e00: cfdaf3dc c02d4c24 c43f7180 c27fc0c0 cfde4694 00000000 00000000 00000000
[ 1.433779] 5e20: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1.441997] 5e40: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1.450215] 5e60: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1.458433] 5e80: 00000000 00000000 00000000 00000000 00000000 c7d16f8f 00000000 00000000
[ 1.466653] 5ea0: c27fc0c0 d0825f48 00000100 00000000 00000000 00000006 c2864a58 c0329db8
[ 1.474871] 5ec0: 00000100 00000001 00000000 00050001 c2864a58 00000100 00000003 00000000
[ 1.483090] 5ee0: d0825ed0 00000100 00000001 00000000 c27fc0c0 00000000 00000000 00000000
[ 1.491308] 5f00: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 c7d16f8f
[ 1.499527] 5f20: 00000000 c2864a00 00000000 00000001 c2068000 c11ed360 00000000 c0332988
[ 1.507745] 5f40: 00000000 00000001 00000000 00000000 c2068000 c7d16f8f 00000000 c2864a00
[ 1.515964] 5f60: c20e0000 c1108094 00000000 00000000 00000000 00000000 00000000 c0333de0
[ 1.524183] 5f80: c11bd000 c0d8c568 00000000 00000000 00000000 c0101364 c11bd000 c0b40a68
[ 1.532401] 5fa0: 00000000 c0b40b4c 00000000 c010014c 00000000 00000000 00000000 00000000
[ 1.540620] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1.548838] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[ 1.557050] Call trace:
[ 1.557069] scomp_acomp_comp_decomp from scomp_acomp_decompress+0x10/0x48
[ 1.566549] scomp_acomp_decompress from ubifs_decompress_req+0xa8/0x148
[ 1.573313] ubifs_decompress_req from ubifs_decompress_folio+0xdc/0x20c
[ 1.580065] ubifs_decompress_folio from do_readpage+0x1e0/0x4b0
[ 1.586116] do_readpage from ubifs_read_folio+0x4c/0x4d8
[ 1.591557] ubifs_read_folio from filemap_read_folio+0x30/0x1fc
[ 1.597612] filemap_read_folio from filemap_get_pages+0x534/0x8ac
[ 1.603841] filemap_get_pages from filemap_read+0x120/0x504
[ 1.609546] filemap_read from __kernel_read+0x164/0x2f4
[ 1.614907] __kernel_read from bprm_execve+0x194/0x3f4
[ 1.620180] bprm_execve from kernel_execve+0x114/0x19c
[ 1.625450] kernel_execve from try_to_run_init_process+0xc/0x38
[ 1.631505] try_to_run_init_process from kernel_init+0xe4/0x134
[ 1.637565] kernel_init from ret_from_fork+0x14/0x28
[ 1.642663] Exception stack(0xd0825fb0 to 0xd0825ff8)
[ 1.647747] 5fa0: 00000000 00000000 00000000 00000000
[ 1.655966] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1.664183] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 1.670835] Code: e1a03623 e0833622 e026609c e003039c (e7963003)
[ 1.676964] ---[ end trace 0000000000000000 ]---
[ 1.681608] note: swapper/0[1] exited with irqs disabled
[ 1.681787] random: crng init done
[ 1.691090] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
[ 1.698805] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b ]---


and

[ 1.756634] 8<--- cut here ---
[ 1.756725] Unable to handle kernel paging request at virtual address d21af3b8 when read
[ 1.756785] [d21af3b8] *pgd=00000000
[ 1.756846] Internal error: Oops: 5 [#1] SMP ARM
[ 1.776263] Modules linked in:
[ 1.779379] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.15.0-rc1-0.0.0-devel #1 PREEMPT
[ 1.788152] Hardware name: Freescale i.MX6 Ultralite (Device Tree)
[ 1.794377] PC is at scomp_acomp_comp_decomp+0x138/0x390
[ 1.799774] LR is at scomp_acomp_decompress+0x10/0x48
[ 1.804894] pc : [<c050aa90>] lr : [<c050b07c>] psr: 20000113
[ 1.811209] sp : d0845a98 ip : 00000024 fp : c25b3c00
[ 1.816482] r10: 00000576 r9 : d0845af0 r8 : c29f8030
[ 1.821753] r7 : cfdaf3b8 r6 : cfdaf3b8 r5 : c282b000 r4 : cfd611e8
[ 1.828331] r3 : 02400000 r2 : 00001000 r1 : d0a0b000 r0 : 00000000
[ 1.834912] Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
[ 1.842108] Control: 10c5387d Table: 8000406a DAC: 00000051
[ 1.847898] Register r0 information: NULL pointer
[ 1.852667] Register r1 information: 16-page vmalloc region starting at 0xd0a0b000 allocated at crypto_scomp_init_tfm+0x8c/0x180
[ 1.864346] Register r2 information: non-paged memory
[ 1.869455] Register r3 information: non-paged memory
[ 1.874567] Register r4 information: non-slab/vmalloc memory
[ 1.880295] Register r5 information: slab kmalloc-192 start c282b000 pointer offset 0 size 192
[ 1.889039] Register r6 information: non-slab/vmalloc memory
[ 1.894758] Register r7 information: non-slab/vmalloc memory
[ 1.900474] Register r8 information: slab kmalloc-8k start c29f8000 pointer offset 48 size 8192
[ 1.909307] Register r9 information: 2-page vmalloc region starting at 0xd0844000 allocated at kernel_clone+0xa4/0x33c
[ 1.920122] Register r10 information: non-paged memory
[ 1.925331] Register r11 information: slab kmalloc-64 start c25b3c00 pointer offset 0 size 64
[ 1.933993] Register r12 information: non-paged memory
[ 1.939194] Process swapper/0 (pid: 1, stack limit = 0xfed1cb98)
[ 1.945266] Stack: (0xd0845a98 to 0xd0846000)
[ 1.949681] 5a80: 00000004 c07edfcc
[ 1.957931] 5aa0: 00000000 00000000 00001000 8eb8c4e6 0804c838 c282b000 c282b000 c24ef000
[ 1.966182] 5ac0: d0845c94 c0dc7064 d0845af0 c29f8030 d0845c94 c050b07c c282b000 00000576
[ 1.974428] 5ae0: c24ef000 c04d40b8 00000000 c07ebbd0 00000000 00000000 d0845af8 d0845af8
[ 1.982676] 5b00: 00000000 8eb8c4e6 c24ef000 c117b6d0 00000000 c29f8030 cfdaf3b8 c4437080
[ 1.990922] 5b20: d0845b40 c04d47e0 d0845c94 c0dc7064 00000576 c2520a80 0000b838 000005a6
[ 1.999167] 5b40: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 2.007411] 5b60: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 2.015655] 5b80: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 2.023902] 5ba0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 2.032149] 5bc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 2.040395] 5be0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 2.048642] 5c00: c24ef000 c04c5e54 00000001 00000000 00000001 c286e300 000009e6 20000000
[ 2.056888] 5c20: 00000000 000002b0 0000b838 000005a6 c29f8000 8eb8c4e6 cfd65e00 00000000
[ 2.065134] 5c40: 00000000 cfdaf3b8 00000000 00000000 c4437080 c29f8000 00001000 c04b58b4
[ 2.073380] 5c60: 00000000 d0845c94 00000001 8eb8c4e6 d0845d50 8eb8c4e6 00040cc0 00000016
[ 2.081629] 5c80: c24ef000 00000000 00015600 c2058000 cfdaf3b8 00001000 000009e6 20000000
[ 2.089876] 5ca0: 00000001 8eb8c4e6 0ecf3000 cfdaf3b8 c24ef000 00000000 c254c0c0 c4437080
[ 2.098125] 5cc0: 00000000 c4437180 c254c0c0 c04b60e4 00000000 ffffffff 00000000 c02a0430
[ 2.106371] 5ce0: 00000cc0 00000001 ffffc005 00000001 d0845d50 00000000 c2058000 8eb8c4e6
[ 2.114619] 5d00: c4437184 cfdaf3b8 00000000 c2058000 c254c0c0 c4437180 c2058000 c4437180
[ 2.122865] 5d20: c254c0c0 c029e91c 00000000 c02ae4d8 00000000 00000000 c2058000 c4437180
[ 2.131112] 5d40: c254c0c0 8eb8c4e6 d0845d50 d0845ef0 00000000 d0845e14 cfdaf3b8 c4437180
[ 2.139358] 5d60: c2058000 c4437180 c254c0c0 c02a0c5c 0ecf3000 00000000 00000001 00000000
[ 2.147603] 5d80: c4437190 00000000 00000100 c2058000 00000001 c2050000 c254c0c0 c4437180
[ 2.155851] 5da0: c254c120 00000000 00000000 00000000 00000000 00000000 000001ff 8eb8c4e6
[ 2.164096] 5dc0: c29e6fb8 00000000 d0845ed8 c4437080 00000000 00000000 ffffffff ffffffff
[ 2.172345] 5de0: d0845ef0 c02a10f4 00000000 d0845ed8 c286f000 beffffd4 00050003 c4437080
[ 2.180591] 5e00: cfdaf3dc c02d4c24 c4437180 c254c0c0 cfde3fd4 00000000 00000000 00000000
[ 2.188835] 5e20: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 2.197082] 5e40: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 2.205330] 5e60: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 2.213579] 5e80: 00000000 00000000 00000000 00000000 00000000 8eb8c4e6 00000000 00000000
[ 2.221827] 5ea0: c254c0c0 d0845f48 00000100 00000000 00000000 00000006 c27e2a58 c0329db8
[ 2.230079] 5ec0: 00000100 00000001 00000000 00050001 c27e2a58 00000100 00000003 00000000
[ 2.238328] 5ee0: d0845ed0 00000100 00000001 00000000 c254c0c0 00000000 00000000 00000000
[ 2.246578] 5f00: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 8eb8c4e6
[ 2.254825] 5f20: 00000000 c27e2a00 00000000 00000001 c2058000 c11ed360 00000000 c0332988
[ 2.263072] 5f40: 00000000 00000001 00000000 00000000 c2058000 8eb8c4e6 00000000 c27e2a00
[ 2.271317] 5f60: c20c8000 c1108094 00000000 00000000 00000000 00000000 00000000 c0333de0
[ 2.279565] 5f80: c11bd000 c0d8c568 00000000 00000000 00000000 c0101364 c11bd000 c0b40a68
[ 2.287811] 5fa0: 00000000 c0b40b4c 00000000 c010014c 00000000 00000000 00000000 00000000
[ 2.296059] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 2.304309] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[ 2.312545] Call trace:
[ 2.312574] scomp_acomp_comp_decomp from scomp_acomp_decompress+0x10/0x48
[ 2.322115] scomp_acomp_decompress from ubifs_decompress_req+0xa8/0x148
[ 2.328928] ubifs_decompress_req from ubifs_decompress_folio+0xdc/0x20c
[ 2.335717] ubifs_decompress_folio from do_readpage+0x1e0/0x4b0
[ 2.341800] do_readpage from ubifs_read_folio+0x4c/0x4d8
[ 2.347269] ubifs_read_folio from filemap_read_folio+0x30/0x1fc
[ 2.353358] filemap_read_folio from filemap_get_pages+0x534/0x8ac
[ 2.359620] filemap_get_pages from filemap_read+0x120/0x504
[ 2.365361] filemap_read from __kernel_read+0x164/0x2f4
[ 2.370759] __kernel_read from bprm_execve+0x194/0x3f4
[ 2.376066] bprm_execve from kernel_execve+0x114/0x19c
[ 2.381367] kernel_execve from try_to_run_init_process+0xc/0x38
[ 2.387457] try_to_run_init_process from kernel_init+0xe4/0x134
[ 2.393560] kernel_init from ret_from_fork+0x14/0x28
[ 2.398690] Exception stack(0xd0845fb0 to 0xd0845ff8)
[ 2.403802] 5fa0: 00000000 00000000 00000000 00000000
[ 2.412053] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 2.420296] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 2.426975] Code: e1a03623 e0833622 e026609c e003039c (e7963003)
[ 2.433133] ---[ end trace 0000000000000000 ]---
[ 2.437800] note: swapper/0[1] exited with irqs disabled
[ 2.443744] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
[ 2.451527] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b ]---


Francesco