While running LTP mm test suite on i386 kernel the following warning and BUG reported on linux next 5.13.0-rc2-next-20210519.
The warning is not regression, We have been noticing these warnings often on i386 but kernel BUG: looks to be a new crash.
------------[ cut here ]------------ [ 696.876399] WARNING: CPU: 1 PID: 24493 at mm/mremap.c:314 move_page_tables+0x18d/0x6e0 [ 696.884319] Modules linked in: x86_pkg_temp_thermal 05.c:78: TPASS: [ 696.889246] CPU: 1 PID: 24493 Comm: true Not tainted 5.13.0-rc2-next-20210519 #1 [ 696.898018] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.2 05/23/2018 [ 696.905462] EIP: move_page_tables+0x18d/0x6e0 still alive. ks[ 696.909865] Code: 40 20 8b 40 24 89 c1 01 d9 0f 84 36 04 00 00 8b 55 08 c1 ea 16 8d 04 90 85 c0 0f 84 e5 02 00 00 80 7d bb 00 0f 85 23 04 00 00 <0f> 0b 80 7d bb 00 0f 84 f7 fe ff ff 8b 45 c8 e8 1f fe ff ff e9 ea [ 696.929986] EAX: c28a5bf8 EBX: 00000bfc ECX: c28a5bfc EDX: 000002fe [ 696.936323] ESI: c0000000 EDI: bfc00000 EBP: c86ffe14 ESP: c86ffda8 m05.c:78: TPASS:[ 696.942614] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010246 [ 696.950777] CR0: 80050033 CR2: b7e13b50 CR3: 028a5000 CR4: 003506d0 [ 696.957043] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 696.963310] DR6: fffe0ff0 DR7: 00000400 [ 696.967148] Call Trace: [ 696.969594] setup_arg_pages+0x28c/0x380 still alive. k[ 696.973563] ? get_random_u32+0x35/0x80 [ 696.978779] ? trace_hardirqs_off+0x2f/0xc0 sm05.c:78: TPASS[ 696.983006] ? trace_hardirqs_on+0x2d/0xc0 [ 696.988484] ? _raw_spin_unlock_irqrestore+0x18/0x20 [ 696.993467] ? get_random_u32+0x4e/0x80 [ 696.997385] load_elf_binary+0x31e/0x11c0 [ 697.001452] ? security_file_permission+0x97/0x170 [ 697.006277] ? kernel_read+0x31/0x40 [ 697.009907] bprm_execve+0x233/0x5f0 [ 697.013541] do_execveat_common+0x129/0x150 [ 697.017725] __ia32_sys_execve+0x28/0x30 [ 697.021650] __do_fast_syscall_32+0x4c/0xc0 [ 697.025835] do_fast_syscall_32+0x29/0x60 [ 697.029850] do_SYSENTER_32+0x15/0x20 [ 697.033516] entry_SYSENTER_32+0x98/0xe7 [ 697.037441] EIP: 0xb7f12549 [ 697.040243] Code: Unable to access opcode bytes at RIP 0xb7f1251f. : still alive. [ 697.046462] EAX: ffffffda EBX: bfd72c00 ECX: 0806b460 EDX: bfd72e54 [ 697.054106] ESI: 0805af94 EDI: bfd72c09 EBP: bfd72cc8 ESP: bfd72bd8 [ 697.060425] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 007b EFLAGS: 00000296 [ 697.067210] ---[ end trace 7b789866f6f48389 ]--- [ 697.071832] ------------[ cut here ]------------
... ksm05.c:78: TPASS: still alive.
[ 699.637408] BUG: unable to handle page fault for address: f752b000 [ 699.644091] #PF: supervisor read access in kernel mode [ 699.649222] #PF: error_code(0x0000) - not-present page [ 699.654357] *pde = 01106067 *pte = 00000000 [ 699.658666] Oops: 0000 [#1] SMP [ 699.661806] CPU: 1 PID: 24636 Comm: true Tainted: G W 5.13.0-rc2-next-20210519 #1 [ 699.670583] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.2 05/23/2018 [ 699.677966] EIP: __kmap_local_page_prot+0x6/0x40 [ 699.682614] Code: 00 00 00 00 c6 05 00 cc 2c d4 00 8b 5d fc c9 c3 8d 74 26 00 0f 0b 0f 0b 8d b4 26 00 00 00 00 8d 74 26 00 90 3e 8d 74 26 00 55 <8b> 08 c1 e9 1e 89 e5 83 f9 02 74 17 83 f9 03 74 09 e8 54 fe ff ff [ 699.701371] EAX: f752b000 EBX: 00000004 ECX: bf400000 EDX: 00000163 [ 699.707640] ESI: f752b000 EDI: c86ffecc EBP: c86ffe60 ESP: c86ffe00 [ 699.713897] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010202 [ 699.720676] CR0: 80050033 CR2: f752b000 CR3: 028a5000 CR4: 003506d0 [ 699.726934] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 699.733197] DR6: fffe0ff0 DR7: 00000400 [ 699.737027] Call Trace: [ 699.739474] ? unmap_page_range+0x154/0x690 [ 699.743658] unmap_single_vma+0x61/0xc0 [ 699.747489] unmap_vmas+0x6f/0xf0 [ 699.750800] exit_mmap+0x71/0x1c0 [ 699.754110] mmput+0x57/0x100 [ 699.757075] do_exit+0x2da/0x9e0 [ 699.760306] ? syscall_trace_enter.isra.0+0x148/0x1b0 [ 699.765372] do_group_exit+0x36/0x90 [ 699.768955] __ia32_sys_exit_group+0x15/0x20 [ 699.773220] __do_fast_syscall_32+0x4c/0xc0 [ 699.777405] do_fast_syscall_32+0x29/0x60 [ 699.781409] do_SYSENTER_32+0x15/0x20 [ 699.785066] entry_SYSENTER_32+0x98/0xe7 [ 699.788984] EIP: 0x1ff58549 [ 699.791774] Code: Unable to access opcode bytes at RIP 0x1ff5851f. [ 699.797945] EAX: ffffffda EBX: 00000000 ECX: 00000001 EDX: 00000000 [ 699.804202] ESI: 1ff471f0 EDI: 1ff493fc EBP: 00000000 ESP: bf1ff3cc [ 699.810458] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 007b EFLAGS: 00000296 [ 699.817236] Modules linked in: x86_pkg_temp_thermal [ 699.822115] CR2: 00000000f752b000 [ 699.825426] ---[ end trace 7b789866f6f4838b ]--- [ 699.830036] EIP: __kmap_local_page_prot+0x6/0x40 [ 699.834655] Code: 00 00 00 00 c6 05 00 cc 2c d4 00 8b 5d fc c9 c3 8d 74 26 00 0f 0b 0f 0b 8d b4 26 00 00 00 00 8d 74 26 00 90 3e 8d 74 26 00 55 <8b> 08 c1 e9 1e 89 e5 83 f9 02 74 17 83 f9 03 74 09 e8 54 fe ff ff [ 699.853401] EAX: f752b000 EBX: 00000004 ECX: bf400000 EDX: 00000163 [ 699.859658] ESI: f752b000 EDI: c86ffecc EBP: c86ffe60 ESP: c86ffe00 [ 699.865915] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010202 [ 699.872690] CR0: 80050033 CR2: f752b000 CR3: 028a5000 CR4: 003506d0 [ 699.878948] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 699.885207] DR6: fffe0ff0 DR7: 00000400 [ 699.889036] Fixing recursive fault but reboot is needed!
ksm05.c:78: TPASS: still alive. .. [ 1599.651922] BUG: unable to handle page fault for address: f7d64000 [ 1599.658959] #PF: supervisor read access in kernel mode [ 1599.664088] #PF: error_code(0x0000) - not-present page [ 1599.669219] *pde = 00000000 [ 1599.672097] Oops: 0000 [#2] SMP [ 1599.675236] CPU: 3 PID: 24646 Comm: thp02 Tainted: G D W 5.13.0-rc2-next-20210519 #1 [ 1599.684102] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.2 05/23/2018 [ 1599.691485] EIP: __kmap_local_page_prot+0x6/0x40 [ 1599.696102] Code: 00 00 00 00 c6 05 00 cc 2c d4 00 8b 5d fc c9 c3 8d 74 26 00 0f 0b 0f 0b 8d b4 26 00 00 00 00 8d 74 26 00 90 3e 8d 74 26 00 55 <8b> 08 c1 e9 1e 89 e5 83 f9 02 74 17 83 f9 03 74 09 e8 54 fe ff ff [ 1599.714840] EAX: f7d64000 EBX: b5800000 ECX: b5800000 EDX: 00000163 [ 1599.721097] ESI: f7d64000 EDI: c1a5decc EBP: c1a5de60 ESP: c1a5de00 [ 1599.727354] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010202 [ 1599.734132] CR0: 80050033 CR2: f7d64000 CR3: 19fce000 CR4: 003506d0 [ 1599.740387] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 1599.746646] DR6: fffe0ff0 DR7: 00000400 [ 1599.750477] Call Trace: [ 1599.752919] ? unmap_page_range+0x154/0x690 [ 1599.757096] unmap_single_vma+0x61/0xc0 [ 1599.760929] unmap_vmas+0x6f/0xf0 [ 1599.764246] exit_mmap+0x71/0x1c0 [ 1599.767558] mmput+0x57/0x100 [ 1599.770531] do_exit+0x2da/0x9e0 [ 1599.773763] ? syscall_trace_enter.isra.0+0x148/0x1b0 [ 1599.778815] do_group_exit+0x36/0x90 [ 1599.782393] __ia32_sys_exit_group+0x15/0x20 [ 1599.786659] __do_fast_syscall_32+0x4c/0xc0 [ 1599.790845] do_fast_syscall_32+0x29/0x60 [ 1599.794857] do_SYSENTER_32+0x15/0x20 [ 1599.798513] entry_SYSENTER_32+0x98/0xe7 [ 1599.802441] EIP: 0xb7fa6549 [ 1599.805237] Code: Unable to access opcode bytes at RIP 0xb7fa651f. [ 1599.811408] EAX: ffffffda EBX: 00000002 ECX: 00000000 EDX: bfff8660 [ 1599.817665] ESI: b7f761f0 EDI: b7f783fc EBP: 00000000 ESP: bfff866c [ 1599.823922] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 007b EFLAGS: 00000296 [ 1599.830702] Modules linked in: x86_pkg_temp_thermal [ 1599.835579] CR2: 00000000f7d64000 [ 1599.838890] ---[ end trace 7b789866f6f4838c ]--- [ 1599.843499] EIP: __kmap_local_page_prot+0x6/0x40 [ 1599.848111] Code: 00 00 00 00 c6 05 00 cc 2c d4 00 8b 5d fc c9 c3 8d 74 26 00 0f 0b 0f 0b 8d b4 26 00 00 00 00 8d 74 26 00 90 3e 8d 74 26 00 55 <8b> 08 c1 e9 1e 89 e5 83 f9 02 74 17 83 f9 03 74 09 e8 54 fe ff ff [ 1599.866849] EAX: f752b000 EBX: 00000004 ECX: bf400000 EDX: 00000163 [ 1599.873114] ESI: f752b000 EDI: c86ffecc EBP: c86ffe60 ESP: c86ffe00 [ 1599.879369] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010202 [ 1599.886148] CR0: 80050033 CR2: f7d64000 CR3: 19fce000 CR4: 003506d0 [ 1599.892404] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 1599.898661] DR6: fffe0ff0 DR7: 00000400 [ 1599.902493] Fixing recursive fault but reboot is needed! O: mremap (0xb6c00000-0xb7bff000) to (0xb5800000-0xb67ff000) thp02.c:84: TBROK: mremap bug
Reported-by: Naresh Kamboju naresh.kamboju@linaro.org
Links: https://lkft.validation.linaro.org/scheduler/job/2742412#L8838
Step to reproduce: ------------------ # cd /opt/ltp # ./runltp -f mm
metadata: git branch: master git repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next git commit: 9f24705effef8c3b9eca00d70594ef7e0364a6da git describe: next-20210519 make_kernelversion: 5.13.0-rc2 kernel-config: https://builds.tuxbuild.com/1sk6bnicwdtrZQO2wqfaMdsZO5z/config
I think this is an i386 specific issue. It shouldn't even have PUDs, right? This is a CONFIG_HIGHMEM4G=y kernel, so it uses PGDs, PMDs and PTEs.
On Wed, May 19, 2021 at 08:38:19PM +0530, Naresh Kamboju wrote:
While running LTP mm test suite on i386 kernel the following warning and BUG reported on linux next 5.13.0-rc2-next-20210519.
The warning is not regression, We have been noticing these warnings often on i386 but kernel BUG: looks to be a new crash.
------------[ cut here ]------------ [ 696.876399] WARNING: CPU: 1 PID: 24493 at mm/mremap.c:314 move_page_tables+0x18d/0x6e0 [ 696.884319] Modules linked in: x86_pkg_temp_thermal 05.c:78: TPASS: [ 696.889246] CPU: 1 PID: 24493 Comm: true Not tainted 5.13.0-rc2-next-20210519 #1 [ 696.898018] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.2 05/23/2018 [ 696.905462] EIP: move_page_tables+0x18d/0x6e0 still alive. ks[ 696.909865] Code: 40 20 8b 40 24 89 c1 01 d9 0f 84 36 04 00 00 8b 55 08 c1 ea 16 8d 04 90 85 c0 0f 84 e5 02 00 00 80 7d bb 00 0f 85 23 04 00 00 <0f> 0b 80 7d bb 00 0f 84 f7 fe ff ff 8b 45 c8 e8 1f fe ff ff e9 ea [ 696.929986] EAX: c28a5bf8 EBX: 00000bfc ECX: c28a5bfc EDX: 000002fe [ 696.936323] ESI: c0000000 EDI: bfc00000 EBP: c86ffe14 ESP: c86ffda8 m05.c:78: TPASS:[ 696.942614] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010246 [ 696.950777] CR0: 80050033 CR2: b7e13b50 CR3: 028a5000 CR4: 003506d0 [ 696.957043] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 696.963310] DR6: fffe0ff0 DR7: 00000400 [ 696.967148] Call Trace: [ 696.969594] setup_arg_pages+0x28c/0x380 still alive. k[ 696.973563] ? get_random_u32+0x35/0x80 [ 696.978779] ? trace_hardirqs_off+0x2f/0xc0 sm05.c:78: TPASS[ 696.983006] ? trace_hardirqs_on+0x2d/0xc0 [ 696.988484] ? _raw_spin_unlock_irqrestore+0x18/0x20 [ 696.993467] ? get_random_u32+0x4e/0x80 [ 696.997385] load_elf_binary+0x31e/0x11c0 [ 697.001452] ? security_file_permission+0x97/0x170 [ 697.006277] ? kernel_read+0x31/0x40 [ 697.009907] bprm_execve+0x233/0x5f0 [ 697.013541] do_execveat_common+0x129/0x150 [ 697.017725] __ia32_sys_execve+0x28/0x30 [ 697.021650] __do_fast_syscall_32+0x4c/0xc0 [ 697.025835] do_fast_syscall_32+0x29/0x60 [ 697.029850] do_SYSENTER_32+0x15/0x20 [ 697.033516] entry_SYSENTER_32+0x98/0xe7 [ 697.037441] EIP: 0xb7f12549 [ 697.040243] Code: Unable to access opcode bytes at RIP 0xb7f1251f. : still alive. [ 697.046462] EAX: ffffffda EBX: bfd72c00 ECX: 0806b460 EDX: bfd72e54 [ 697.054106] ESI: 0805af94 EDI: bfd72c09 EBP: bfd72cc8 ESP: bfd72bd8 [ 697.060425] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 007b EFLAGS: 00000296 [ 697.067210] ---[ end trace 7b789866f6f48389 ]--- [ 697.071832] ------------[ cut here ]------------
... ksm05.c:78: TPASS: still alive.
[ 699.637408] BUG: unable to handle page fault for address: f752b000 [ 699.644091] #PF: supervisor read access in kernel mode [ 699.649222] #PF: error_code(0x0000) - not-present page [ 699.654357] *pde = 01106067 *pte = 00000000 [ 699.658666] Oops: 0000 [#1] SMP [ 699.661806] CPU: 1 PID: 24636 Comm: true Tainted: G W 5.13.0-rc2-next-20210519 #1 [ 699.670583] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.2 05/23/2018 [ 699.677966] EIP: __kmap_local_page_prot+0x6/0x40 [ 699.682614] Code: 00 00 00 00 c6 05 00 cc 2c d4 00 8b 5d fc c9 c3 8d 74 26 00 0f 0b 0f 0b 8d b4 26 00 00 00 00 8d 74 26 00 90 3e 8d 74 26 00 55 <8b> 08 c1 e9 1e 89 e5 83 f9 02 74 17 83 f9 03 74 09 e8 54 fe ff ff [ 699.701371] EAX: f752b000 EBX: 00000004 ECX: bf400000 EDX: 00000163 [ 699.707640] ESI: f752b000 EDI: c86ffecc EBP: c86ffe60 ESP: c86ffe00 [ 699.713897] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010202 [ 699.720676] CR0: 80050033 CR2: f752b000 CR3: 028a5000 CR4: 003506d0 [ 699.726934] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 699.733197] DR6: fffe0ff0 DR7: 00000400 [ 699.737027] Call Trace: [ 699.739474] ? unmap_page_range+0x154/0x690 [ 699.743658] unmap_single_vma+0x61/0xc0 [ 699.747489] unmap_vmas+0x6f/0xf0 [ 699.750800] exit_mmap+0x71/0x1c0 [ 699.754110] mmput+0x57/0x100 [ 699.757075] do_exit+0x2da/0x9e0 [ 699.760306] ? syscall_trace_enter.isra.0+0x148/0x1b0 [ 699.765372] do_group_exit+0x36/0x90 [ 699.768955] __ia32_sys_exit_group+0x15/0x20 [ 699.773220] __do_fast_syscall_32+0x4c/0xc0 [ 699.777405] do_fast_syscall_32+0x29/0x60 [ 699.781409] do_SYSENTER_32+0x15/0x20 [ 699.785066] entry_SYSENTER_32+0x98/0xe7 [ 699.788984] EIP: 0x1ff58549 [ 699.791774] Code: Unable to access opcode bytes at RIP 0x1ff5851f. [ 699.797945] EAX: ffffffda EBX: 00000000 ECX: 00000001 EDX: 00000000 [ 699.804202] ESI: 1ff471f0 EDI: 1ff493fc EBP: 00000000 ESP: bf1ff3cc [ 699.810458] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 007b EFLAGS: 00000296 [ 699.817236] Modules linked in: x86_pkg_temp_thermal [ 699.822115] CR2: 00000000f752b000 [ 699.825426] ---[ end trace 7b789866f6f4838b ]--- [ 699.830036] EIP: __kmap_local_page_prot+0x6/0x40 [ 699.834655] Code: 00 00 00 00 c6 05 00 cc 2c d4 00 8b 5d fc c9 c3 8d 74 26 00 0f 0b 0f 0b 8d b4 26 00 00 00 00 8d 74 26 00 90 3e 8d 74 26 00 55 <8b> 08 c1 e9 1e 89 e5 83 f9 02 74 17 83 f9 03 74 09 e8 54 fe ff ff [ 699.853401] EAX: f752b000 EBX: 00000004 ECX: bf400000 EDX: 00000163 [ 699.859658] ESI: f752b000 EDI: c86ffecc EBP: c86ffe60 ESP: c86ffe00 [ 699.865915] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010202 [ 699.872690] CR0: 80050033 CR2: f752b000 CR3: 028a5000 CR4: 003506d0 [ 699.878948] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 699.885207] DR6: fffe0ff0 DR7: 00000400 [ 699.889036] Fixing recursive fault but reboot is needed!
ksm05.c:78: TPASS: still alive. .. [ 1599.651922] BUG: unable to handle page fault for address: f7d64000 [ 1599.658959] #PF: supervisor read access in kernel mode [ 1599.664088] #PF: error_code(0x0000) - not-present page [ 1599.669219] *pde = 00000000 [ 1599.672097] Oops: 0000 [#2] SMP [ 1599.675236] CPU: 3 PID: 24646 Comm: thp02 Tainted: G D W 5.13.0-rc2-next-20210519 #1 [ 1599.684102] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.2 05/23/2018 [ 1599.691485] EIP: __kmap_local_page_prot+0x6/0x40 [ 1599.696102] Code: 00 00 00 00 c6 05 00 cc 2c d4 00 8b 5d fc c9 c3 8d 74 26 00 0f 0b 0f 0b 8d b4 26 00 00 00 00 8d 74 26 00 90 3e 8d 74 26 00 55 <8b> 08 c1 e9 1e 89 e5 83 f9 02 74 17 83 f9 03 74 09 e8 54 fe ff ff [ 1599.714840] EAX: f7d64000 EBX: b5800000 ECX: b5800000 EDX: 00000163 [ 1599.721097] ESI: f7d64000 EDI: c1a5decc EBP: c1a5de60 ESP: c1a5de00 [ 1599.727354] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010202 [ 1599.734132] CR0: 80050033 CR2: f7d64000 CR3: 19fce000 CR4: 003506d0 [ 1599.740387] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 1599.746646] DR6: fffe0ff0 DR7: 00000400 [ 1599.750477] Call Trace: [ 1599.752919] ? unmap_page_range+0x154/0x690 [ 1599.757096] unmap_single_vma+0x61/0xc0 [ 1599.760929] unmap_vmas+0x6f/0xf0 [ 1599.764246] exit_mmap+0x71/0x1c0 [ 1599.767558] mmput+0x57/0x100 [ 1599.770531] do_exit+0x2da/0x9e0 [ 1599.773763] ? syscall_trace_enter.isra.0+0x148/0x1b0 [ 1599.778815] do_group_exit+0x36/0x90 [ 1599.782393] __ia32_sys_exit_group+0x15/0x20 [ 1599.786659] __do_fast_syscall_32+0x4c/0xc0 [ 1599.790845] do_fast_syscall_32+0x29/0x60 [ 1599.794857] do_SYSENTER_32+0x15/0x20 [ 1599.798513] entry_SYSENTER_32+0x98/0xe7 [ 1599.802441] EIP: 0xb7fa6549 [ 1599.805237] Code: Unable to access opcode bytes at RIP 0xb7fa651f. [ 1599.811408] EAX: ffffffda EBX: 00000002 ECX: 00000000 EDX: bfff8660 [ 1599.817665] ESI: b7f761f0 EDI: b7f783fc EBP: 00000000 ESP: bfff866c [ 1599.823922] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 007b EFLAGS: 00000296 [ 1599.830702] Modules linked in: x86_pkg_temp_thermal [ 1599.835579] CR2: 00000000f7d64000 [ 1599.838890] ---[ end trace 7b789866f6f4838c ]--- [ 1599.843499] EIP: __kmap_local_page_prot+0x6/0x40 [ 1599.848111] Code: 00 00 00 00 c6 05 00 cc 2c d4 00 8b 5d fc c9 c3 8d 74 26 00 0f 0b 0f 0b 8d b4 26 00 00 00 00 8d 74 26 00 90 3e 8d 74 26 00 55 <8b> 08 c1 e9 1e 89 e5 83 f9 02 74 17 83 f9 03 74 09 e8 54 fe ff ff [ 1599.866849] EAX: f752b000 EBX: 00000004 ECX: bf400000 EDX: 00000163 [ 1599.873114] ESI: f752b000 EDI: c86ffecc EBP: c86ffe60 ESP: c86ffe00 [ 1599.879369] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010202 [ 1599.886148] CR0: 80050033 CR2: f7d64000 CR3: 19fce000 CR4: 003506d0 [ 1599.892404] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 1599.898661] DR6: fffe0ff0 DR7: 00000400 [ 1599.902493] Fixing recursive fault but reboot is needed! O: mremap (0xb6c00000-0xb7bff000) to (0xb5800000-0xb67ff000) thp02.c:84: TBROK: mremap bug
Reported-by: Naresh Kamboju naresh.kamboju@linaro.org
Links: https://lkft.validation.linaro.org/scheduler/job/2742412#L8838
Step to reproduce:
# cd /opt/ltp # ./runltp -f mm
metadata: git branch: master git repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next git commit: 9f24705effef8c3b9eca00d70594ef7e0364a6da git describe: next-20210519 make_kernelversion: 5.13.0-rc2 kernel-config: https://builds.tuxbuild.com/1sk6bnicwdtrZQO2wqfaMdsZO5z/config
-- Linaro LKFT https://lkft.linaro.org
On Wed, May 19 2021 at 20:38, Naresh Kamboju wrote:
While running LTP mm test suite on i386 kernel the following warning and BUG reported on linux next 5.13.0-rc2-next-20210519.
The warning is not regression, We have been noticing these warnings often on i386
Noticing? Did you report them?
but kernel BUG: looks to be a new crash.
It's just the consequence of the problem which is pointed out by the warning. Fix below.
Thanks,
tglx --- Subject: x86: Don't enable CONFIG_MOVE_PUD for 32bit and !PAE From: Thomas Gleixner tglx@linutronix.de Date: Wed, 19 May 2021 20:37:34 +0200
MOVE_PUD cannot work for 2-level paging obviously.
Fixes: be37c98d1134 ("x86: mremap speedup - Enable HAVE_MOVE_PUD") Signed-off-by: Thomas Gleixner tglx@linutronix.de Cc: Kalesh Singh kaleshsingh@google.com Cc: stable@vger.kernel.org --- arch/x86/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -219,7 +219,7 @@ config X86 select HAVE_MIXED_BREAKPOINTS_REGS select HAVE_MOD_ARCH_SPECIFIC select HAVE_MOVE_PMD - select HAVE_MOVE_PUD + select HAVE_MOVE_PUD if PGTABLE_LEVELS > 2 select HAVE_NMI select HAVE_OPTPROBES select HAVE_PCSPKR_PLATFORM
On Wed, May 19, 2021 at 08:50:54PM +0200, Thomas Gleixner wrote:
On Wed, May 19 2021 at 20:38, Naresh Kamboju wrote:
While running LTP mm test suite on i386 kernel the following warning and BUG reported on linux next 5.13.0-rc2-next-20210519.
The warning is not regression, We have been noticing these warnings often on i386
Noticing? Did you report them?
but kernel BUG: looks to be a new crash.
It's just the consequence of the problem which is pointed out by the warning. Fix below.
Maybe something like so as well?
--- mm/mremap.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/mm/mremap.c b/mm/mremap.c index 47c255b60150..477a908bdb6b 100644 --- a/mm/mremap.c +++ b/mm/mremap.c @@ -210,6 +210,10 @@ static void move_ptes(struct vm_area_struct *vma, pmd_t *old_pmd, }
#ifdef CONFIG_HAVE_MOVE_PMD +#if CONFIG_PGTABLE_LEVELS < 2 +#error "Can't very well move non-existant pgtable levels" +#endif + static bool move_normal_pmd(struct vm_area_struct *vma, unsigned long old_addr, unsigned long new_addr, pmd_t *old_pmd, pmd_t *new_pmd) { @@ -277,6 +281,10 @@ static inline bool move_normal_pmd(struct vm_area_struct *vma, #endif
#ifdef CONFIG_HAVE_MOVE_PUD +#if CONFIG_PGTABLE_LEVELS < 3 +#error "Can't very well move non-existant pgtable levels" +#endif + static bool move_normal_pud(struct vm_area_struct *vma, unsigned long old_addr, unsigned long new_addr, pud_t *old_pud, pud_t *new_pud) {
On Thu, 20 May 2021 at 00:20, Thomas Gleixner tglx@linutronix.de wrote:
On Wed, May 19 2021 at 20:38, Naresh Kamboju wrote:
While running LTP mm test suite on i386 kernel the following warning and BUG reported on linux next 5.13.0-rc2-next-20210519.
The warning is not regression, We have been noticing these warnings often on i386
Noticing? Did you report them?
I have reported this,
https://lore.kernel.org/linux-mm/CA+G9fYt+6OeibZMD0fP=O3nqFbcN3O4xcLkjq0mpQb...
but kernel BUG: looks to be a new crash.
It's just the consequence of the problem which is pointed out by the warning. Fix below.
The below patch did not solve the reported problem. after applying this patch CONFIG_HAVE_MOVE_PUD disappeared from the config. but still i see WARNING: and BUG: when running LTP mm tests.
Test log link, FYI, i386 kernel Image running on x86_64 machine. https://lkft.validation.linaro.org/scheduler/job/2749690#L10139
Thanks,
tglx
Subject: x86: Don't enable CONFIG_MOVE_PUD for 32bit and !PAE From: Thomas Gleixner tglx@linutronix.de Date: Wed, 19 May 2021 20:37:34 +0200
MOVE_PUD cannot work for 2-level paging obviously.
Fixes: be37c98d1134 ("x86: mremap speedup - Enable HAVE_MOVE_PUD") Signed-off-by: Thomas Gleixner tglx@linutronix.de Cc: Kalesh Singh kaleshsingh@google.com Cc: stable@vger.kernel.org
arch/x86/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -219,7 +219,7 @@ config X86 select HAVE_MIXED_BREAKPOINTS_REGS select HAVE_MOD_ARCH_SPECIFIC select HAVE_MOVE_PMD
select HAVE_MOVE_PUD
select HAVE_MOVE_PUD if PGTABLE_LEVELS > 2 select HAVE_NMI select HAVE_OPTPROBES select HAVE_PCSPKR_PLATFORM
- Naresh
On Thu, May 20 2021 at 12:40, Naresh Kamboju wrote:
On Thu, 20 May 2021 at 00:20, Thomas Gleixner tglx@linutronix.de wrote:
The below patch did not solve the reported problem. after applying this patch CONFIG_HAVE_MOVE_PUD disappeared from the config. but still i see WARNING: and BUG: when running LTP mm tests.
Yes, but that's a different warning ....
Test log link, FYI, i386 kernel Image running on x86_64 machine. https://lkft.validation.linaro.org/scheduler/job/2749690#L10139
Sorry, but this webpage is making my browser go apeshit and finding anything in that gunk of user space messages is a pain. Can we please have a proper plain dmesg?
Thanks,
tglx
On Thu, 20 May 2021 at 18:21, Thomas Gleixner tglx@linutronix.de wrote:
On Thu, May 20 2021 at 12:40, Naresh Kamboju wrote:
On Thu, 20 May 2021 at 00:20, Thomas Gleixner tglx@linutronix.de wrote:
The below patch did not solve the reported problem. after applying this patch CONFIG_HAVE_MOVE_PUD disappeared from the config. but still i see WARNING: and BUG: when running LTP mm tests.
Yes, but that's a different warning ....
Test log link, FYI, i386 kernel Image running on x86_64 machine. https://lkft.validation.linaro.org/scheduler/job/2749690#L10139
Sorry, but this webpage is making my browser go apeshit and finding anything in that gunk of user space messages is a pain. Can we please have a proper plain dmesg?
Attached dmesg and test log in a single file and short url. http://ix.io/3nnQ
- Naresh
-
Matthew Wilcox -
Naresh Kamboju -
Peter Zijlstra -
Thomas Gleixner