Linux 6.15-rc1 regression, folio/ubifs Oops

Linux 6.15-rc1 regression, folio/ubifs Oops

[Francesco Dolcini]

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

Re: Linux 6.15-rc1 regression, folio/ubifs Oops

[Richard Weinberger]

----- Ursprüngliche Mail -----
> Von: "Francesco Dolcini" <francesco@dolcini.it>
> An: "richard" <richard@nod.at>, "linux-mtd" <linux-mtd@lists.infradead.org>, "Matthew Wilcox" <willy@infradead.org>,
> "chengzhihao1" <chengzhihao1@huawei.com>
> CC: "regressions" <regressions@lists.linux.dev>, "linux-kernel" <linux-kernel@vger.kernel.org>
> Gesendet: Dienstag, 8. April 2025 10:20:18
> Betreff: Linux 6.15-rc1 regression, folio/ubifs Oops

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

I'm still massively behind my schedule, but I'd suspect it has something to do with
https://patchwork.ozlabs.org/project/linux-mtd/list/?series=448466

Thanks,
//richard

Re: Linux 6.15-rc1 regression, folio/ubifs Oops

[Christian Heusel]

[-- Attachment #1: Type: text/plain, Size: 510 bytes --]

On 25/04/08 10:20AM, Francesco Dolcini wrote:
> Hello all,

Hey Francesco,

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

could you try to bisect which change has caused this problem?
This usually the best way to pinpoint the commit that causes the issue
and either get a fix or a revert on the way 🤗

You can find the relevant docs here:
https://docs.kernel.org/admin-guide/bug-bisect.html

> Francesco

Cheers,
Chris

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]

Re: Linux 6.15-rc1 regression, folio/ubifs Oops

[Francesco Dolcini]

+ Herbert, Zhihao

Hello all,

On Tue, Apr 08, 2025 at 10:20:18AM +0200, Francesco Dolcini wrote:
> 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 ]---
> 

The issue is still present on current master, I did bisect it, the
regression is from commit 7e0969bae493 ("ubifs: Pass folios to acomp"),
reverting it on top of current master solves the issue.

How should we proceed?

Unless someone is able to look into that I gonna send a revert patch,
the regression is severe, the machine is not booting anymore.

Francesco

Re: Linux 6.15-rc1 regression, folio/ubifs Oops

[Herbert Xu]

On Tue, Apr 22, 2025 at 07:54:09PM +0200, Francesco Dolcini wrote:
> 
> On Tue, Apr 08, 2025 at 10:20:18AM +0200, Francesco Dolcini wrote:
> > I do have the following regression on single core system using UBIFS,
> > dual core seems not affected, any idea?

Please try this patch which will go in today:

https://patchwork.kernel.org/project/linux-crypto/patch/aAW8E9NrKWq1Xk2w@gondor.apana.org.au/

Cheers,
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

Re: Linux 6.15-rc1 regression, folio/ubifs Oops

[Francesco Dolcini]

On Wed, Apr 23, 2025 at 09:22:18AM +0800, Herbert Xu wrote:
> On Tue, Apr 22, 2025 at 07:54:09PM +0200, Francesco Dolcini wrote:
> > 
> > On Tue, Apr 08, 2025 at 10:20:18AM +0200, Francesco Dolcini wrote:
> > > I do have the following regression on single core system using UBIFS,
> > > dual core seems not affected, any idea?
> 
> Please try this patch which will go in today:
> 
> https://patchwork.kernel.org/project/linux-crypto/patch/aAW8E9NrKWq1Xk2w@gondor.apana.org.au/

Yes, I fixes the issue, thanks.

Francesco

Re: Linux 6.15-rc1 regression, folio/ubifs Oops

[Richard Weinberger]

----- Ursprüngliche Mail -----
> Von: "Francesco Dolcini" <francesco@dolcini.it>
> An: "Herbert Xu" <herbert@gondor.apana.org.au>
> CC: "Francesco Dolcini" <francesco@dolcini.it>, "chengzhihao1" <chengzhihao1@huawei.com>, "richard" <richard@nod.at>,
> "linux-mtd" <linux-mtd@lists.infradead.org>, "Matthew Wilcox" <willy@infradead.org>, "regressions"
> <regressions@lists.linux.dev>, "linux-kernel" <linux-kernel@vger.kernel.org>, "Linux Crypto Mailing List"
> <linux-crypto@vger.kernel.org>
> Gesendet: Mittwoch, 23. April 2025 08:54:46
> Betreff: Re: Linux 6.15-rc1 regression, folio/ubifs Oops

> On Wed, Apr 23, 2025 at 09:22:18AM +0800, Herbert Xu wrote:
>> On Tue, Apr 22, 2025 at 07:54:09PM +0200, Francesco Dolcini wrote:
>> > 
>> > On Tue, Apr 08, 2025 at 10:20:18AM +0200, Francesco Dolcini wrote:
>> > > I do have the following regression on single core system using UBIFS,
>> > > dual core seems not affected, any idea?
>> 
>> Please try this patch which will go in today:
>> 
>> https://patchwork.kernel.org/project/linux-crypto/patch/aAW8E9NrKWq1Xk2w@gondor.apana.org.au/
> 
> Yes, I fixes the issue, thanks.

Thanks for testing this!

Thanks,
//richard