i386: selftests: vm: compaction_test: BUG: kernel NULL pointer dereference, address: 00000000
On Linux mainline kernel 5.6.0 running kselftest vm compaction_test on i386 kernel running on x86_64 devices we have noticed this Kernel BUG followed by Kernel panic.
BUG: kernel NULL pointer dereference, address: 00000000 Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009
Steps to reproduce: -------------------------- # cd /opt/kselftests/default-in-kernel/vm/ # ./compaction_test
[ 45.955706] kauditd_printk_skb: 15 callbacks suppressed [ 45.955707] audit: type=1334 audit(1586671685.974:25): prog-id=13 op=UNLOAD [ 45.968082] audit: type=1334 audit(1586671685.974:26): prog-id=12 op=UNLOAD [ 46.008163] get_swap_device: Bad swap file entry 7007504a [ 46.013647] BUG: kernel NULL pointer dereference, address: 00000000 [ 46.019918] #PF: supervisor read access in kernel mode [ 46.025048] #PF: error_code(0x0000) - not-present page [ 46.030181] *pde = 00000000 [ 46.033065] Oops: 0000 [#1] SMP [ 46.036204] CPU: 0 PID: 324 Comm: systemd-journal Not tainted 5.6.0 #1 [ 46.042727] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.0b 07/27/2017 [ 46.050202] EIP: do_swap_page+0x172/0x9d0 [ 46.054213] Code: 00 8b 4d f0 65 33 0d 14 00 00 00 8b 45 e0 0f 85 6c 08 00 00 8d 65 f4 5b 5e 5f 5d c3 8d 74 26 00 8b 75 e4 89 f0 e8 9e 0e 02 00 <8b> 00 f6 c4 10 74 10 89 f0 e8 30 dd 01 00 83 f8 01 0f 84 a7 04 00 [ 46.072958] EAX: 00000000 EBX: f3739f28 ECX: f590e840 EDX: 00000000 [ 46.079214] ESI: 7007504a EDI: 00000000 EBP: f3739f08 ESP: f3739ed0 [ 46.085473] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010246 [ 46.092250] CR0: 80050033 CR2: 00000000 CR3: 33abb000 CR4: 003406d0 [ 46.098506] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 46.104763] DR6: fffe0ff0 DR7: 00000400 [ 46.108595] Call Trace: [ 46.111040] ? lock_release+0x8a/0x260 [ 46.114792] handle_mm_fault+0x430/0xcf0 [ 46.118715] do_page_fault+0x1ab/0x620 [ 46.122472] ? vmalloc_sync+0x180/0x180 [ 46.126309] common_exception_read_cr2+0x15f/0x164 [ 46.131093] EIP: 0xb7d37e10 [ 46.133884] Code: Bad RIP value. [ 46.137109] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2 [ 46.143373] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c [ 46.149632] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206 [ 46.156420] Modules linked in: x86_pkg_temp_thermal fuse [ 46.161729] CR2: 0000000000000000 [ 46.165041] ---[ end trace 27c0fb4a809b98f6 ]--- [ 46.169651] EIP: do_swap_page+0x172/0x9d0 [ 46.173656] Code: 00 8b 4d f0 65 33 0d 14 00 00 00 8b 45 e0 0f 85 6c 08 00 00 8d 65 f4 5b 5e 5f 5d c3 8d 74 26 00 8b 75 e4 89 f0 e8 9e 0e 02 00 <8b> 00 f6 c4 10 74 10 89 f0 e8 30 dd 01 00 83 f8 01 0f 84 a7 04 00 [ 46.192401] EAX: 00000000 EBX: f3739f28 ECX: f590e840 EDX: 00000000 [ 46.198656] ESI: 7007504a EDI: 00000000 EBP: f3739f08 ESP: f3739ed0 [ 46.204914] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010246 [ 46.211693] CR0: 80050033 CR2: b7d37e06 CR3: 33abb000 CR4: 003406d0 [ 46.217949] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 46.224206] DR6: fffe0ff0 DR7: 00000400 [ 46.228039] BUG: sleeping function called from invalid context at /usr/src/kernel/include/linux/percpu-rwsem.h:49 [ 46.238290] in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 324, name: systemd-journal [ 46.246801] INFO: lockdep is turned off. [ 46.250717] irq event stamp: 433914 [ 46.254205] hardirqs last enabled at (433913): [<cb16040d>] console_unlock+0x46d/0x600 [ 46.262203] hardirqs last disabled at (433914): [<cb0019dc>] trace_hardirqs_off_thunk+0xc/0x10 [ 46.270807] softirqs last enabled at (433910): [<cbe07675>] __do_softirq+0x2d5/0x3e2 [ 46.278625] softirqs last disabled at (433743): [<cb0a6645>] call_on_stack+0x45/0x50 [ 46.286354] CPU: 0 PID: 324 Comm: systemd-journal Tainted: G D 5.6.0 #1 [ 46.294259] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.0b 07/27/2017 [ 46.301729] Call Trace: [ 46.304174] dump_stack+0x6e/0x96 [ 46.307487] ___might_sleep+0x14d/0x240 [ 46.311323] __might_sleep+0x33/0x80 [ 46.314896] exit_signals+0x2a/0x2d0 [ 46.318475] do_exit+0x8e/0xb40 [ 46.321621] rewind_stack_do_exit+0x11/0x13 [ 46.325804] EIP: 0xb7d37e10 [ 46.328597] Code: Bad RIP value. [ 46.331820] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2 [ 46.338078] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c [ 46.344333] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206 [ 46.351270] swap_info_get: Bad swap file entry 7007742a [ 46.356514] BUG: Bad page map in process systemd-journal pte:0ee8543c pmd:8c4a6067 [ 46.364211] addr:b7ccc000 vm_flags:00000075 anon_vma:00000000 mapping:f41d87c0 index:178 [ 46.372302] file:libc-2.27.so fault:filemap_fault mmap:nfs_file_mmap readpage:nfs_readpage [ 46.380573] CPU: 0 PID: 324 Comm: systemd-journal Tainted: G D W 5.6.0 #1 [ 46.388482] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.0b 07/27/2017 [ 46.395951] Call Trace: [ 46.398397] dump_stack+0x6e/0x96 [ 46.401708] ? nfs_readpage_async+0x2f0/0x2f0 [ 46.406058] print_bad_pte+0x11d/0x1b0 [ 46.409804] ? read_cache_page_gfp+0x20/0x20 [ 46.414073] ? nfs_file_read+0xa0/0xa0 [ 46.417820] ? nfs_readpage_async+0x2f0/0x2f0 [ 46.422179] unmap_page_range+0x3fe/0x740 [ 46.426194] unmap_single_vma+0x60/0xc0 [ 46.430031] unmap_vmas+0xb3/0x140 [ 46.433437] exit_mmap+0x80/0x160 [ 46.436760] mmput+0x56/0x100 [ 46.439729] do_exit+0x2f8/0xb40 [ 46.442964] rewind_stack_do_exit+0x11/0x13 [ 46.447146] EIP: 0xb7d37e10 [ 46.449938] Code: Bad RIP value. [ 46.453161] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2 [ 46.459417] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c [ 46.465676] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206 [ 46.472488] swap_info_get: Bad swap file entry 7007772b [ 46.477729] BUG: Bad page map in process systemd-journal pte:0eee563c pmd:8c4a6067 [ 46.485389] addr:b7ccd000 vm_flags:00000075 anon_vma:00000000 mapping:f41d87c0 index:179 [ 46.493476] file:libc-2.27.so fault:filemap_fault mmap:nfs_file_mmap readpage:nfs_readpage [ 46.501740] CPU: 2 PID: 324 Comm: systemd-journal Tainted: G B D W 5.6.0 #1 [ 46.509651] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.0b 07/27/2017 [ 46.517119] Call Trace: [ 46.519578] dump_stack+0x6e/0x96 [ 46.522903] ? nfs_readpage_async+0x2f0/0x2f0 [ 46.527260] print_bad_pte+0x11d/0x1b0 [ 46.531006] ? read_cache_page_gfp+0x20/0x20 [ 46.535278] ? nfs_file_read+0xa0/0xa0 [ 46.539021] ? nfs_readpage_async+0x2f0/0x2f0 [ 46.543373] unmap_page_range+0x3fe/0x740 [ 46.547379] unmap_single_vma+0x60/0xc0 [ 46.551216] unmap_vmas+0xb3/0x140 [ 46.554625] exit_mmap+0x80/0x160 [ 46.557944] mmput+0x56/0x100 [ 46.560912] do_exit+0x2f8/0xb40 [ 46.564138] rewind_stack_do_exit+0x11/0x13 [ 46.568321] EIP: 0xb7d37e10 [ 46.571114] Code: Bad RIP value. [ 46.574337] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2 [ 46.580594] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c [ 46.586851] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206 [ 46.593641] swap_info_get: Bad swap file entry 7007762a [ 46.598877] BUG: Bad page map in process systemd-journal pte:0eec543c pmd:8c4a6067 [ 46.606530] addr:b7cce000 vm_flags:00000075 anon_vma:00000000 mapping:f41d87c0 index:17a [ 46.614650] file:libc-2.27.so fault:filemap_fault mmap:nfs_file_mmap readpage:nfs_readpage [ 46.622907] CPU: 2 PID: 324 Comm: systemd-journal Tainted: G B D W 5.6.0 #1 [ 46.630817] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.0b 07/27/2017 [ 46.638287] Call Trace: [ 46.640733] dump_stack+0x6e/0x96 [ 46.644051] ? nfs_readpage_async+0x2f0/0x2f0 [ 46.648403] print_bad_pte+0x11d/0x1b0 [ 46.652147] ? read_cache_page_gfp+0x20/0x20 [ 46.656419] ? nfs_file_read+0xa0/0xa0 [ 46.660162] ? nfs_readpage_async+0x2f0/0x2f0 [ 46.664515] unmap_page_range+0x3fe/0x740 [ 46.668529] unmap_single_vma+0x60/0xc0 [ 46.672366] unmap_vmas+0xb3/0x140 [ 46.675766] exit_mmap+0x80/0x160 [ 46.679086] mmput+0x56/0x100 [ 46.682056] do_exit+0x2f8/0xb40 [ 46.685290] rewind_stack_do_exit+0x11/0x13 [ 46.689474] EIP: 0xb7d37e10 [ 46.692264] Code: Bad RIP value. [ 46.695489] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2 [ 46.701753] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c [ 46.708012] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206 [ 46.714810] swap_info_get: Bad swap file entry 7007522f [ 46.720035] BUG: Bad page map in process systemd-journal pte:0ea45e3c pmd:8c4a6067 [ 46.727686] addr:b7d35000 vm_flags:00000075 anon_vma:00000000 mapping:f41d2ac0 index:e [ 46.735602] file:libpthread-2.27.so fault:filemap_fault mmap:nfs_file_mmap readpage:nfs_readpage [ 46.744380] CPU: 2 PID: 324 Comm: systemd-journal Tainted: G B D W 5.6.0 #1 [ 46.752287] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.0b 07/27/2017 [ 46.759759] Call Trace: [ 46.762203] dump_stack+0x6e/0x96 [ 46.765514] ? nfs_readpage_async+0x2f0/0x2f0 [ 46.769866] print_bad_pte+0x11d/0x1b0 [ 46.773617] ? read_cache_page_gfp+0x20/0x20 [ 46.777882] ? nfs_file_read+0xa0/0xa0 [ 46.781624] ? nfs_readpage_async+0x2f0/0x2f0 [ 46.785976] unmap_page_range+0x3fe/0x740 [ 46.789982] unmap_single_vma+0x60/0xc0 [ 46.793819] unmap_vmas+0xb3/0x140 [ 46.797218] exit_mmap+0x80/0x160 [ 46.800538] mmput+0x56/0x100 [ 46.803509] do_exit+0x2f8/0xb40 [ 46.806736] rewind_stack_do_exit+0x11/0x13 [ 46.810918] EIP: 0xb7d37e10 [ 46.813710] Code: Bad RIP value. [ 46.816940] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2 [ 46.823197] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c [ 46.829457] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206 [ 46.836248] swap_info_get: Bad swap file entry 7007504a [ 46.841477] BUG: Bad page map in process systemd-journal pte:0ea0943c pmd:8c4a6067 [ 46.849131] addr:b7d37000 vm_flags:00000075 anon_vma:00000000 mapping:f41d2ac0 index:10 [ 46.857132] file:libpthread-2.27.so fault:filemap_fault mmap:nfs_file_mmap readpage:nfs_readpage [ 46.865913] CPU: 2 PID: 324 Comm: systemd-journal Tainted: G B D W 5.6.0 #1 [ 46.873820] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.0b 07/27/2017 [ 46.881290] Call Trace: [ 46.883736] dump_stack+0x6e/0x96 [ 46.887056] ? nfs_readpage_async+0x2f0/0x2f0 [ 46.891413] print_bad_pte+0x11d/0x1b0 [ 46.895159] ? read_cache_page_gfp+0x20/0x20 [ 46.899429] ? nfs_file_read+0xa0/0xa0 [ 46.903175] ? nfs_readpage_async+0x2f0/0x2f0 [ 46.907533] unmap_page_range+0x3fe/0x740 [ 46.911539] unmap_single_vma+0x60/0xc0 [ 46.915378] unmap_vmas+0xb3/0x140 [ 46.918784] exit_mmap+0x80/0x160 [ 46.922105] mmput+0x56/0x100 [ 46.925074] do_exit+0x2f8/0xb40 [ 46.928300] rewind_stack_do_exit+0x11/0x13 [ 46.932485] EIP: 0xb7d37e10 [ 46.935276] Code: Bad RIP value. [ 46.938507] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2 [ 46.944763] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c [ 46.951023] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206 [ 46.957836] swap_info_get: Bad swap file entry 70073aa6 [ 46.963124] BUG: Bad page map in process systemd-journal pte:0e754c3c pmd:8c4a6067 [ 46.970785] addr:b7dd9000 vm_flags:00000075 anon_vma:00000000 mapping:f5008c20 index:8f [ 46.978800] file:libsystemd-shared-237.so fault:filemap_fault mmap:nfs_file_mmap readpage:nfs_readpage [ 46.988111] CPU: 2 PID: 324 Comm: systemd-journal Tainted: G B D W 5.6.0 #1 [ 46.996044] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.0b 07/27/2017 [ 47.003514] Call Trace: [ 47.005959] dump_stack+0x6e/0x96 [ 47.009269] ? nfs_readpage_async+0x2f0/0x2f0 [ 47.013621] print_bad_pte+0x11d/0x1b0 [ 47.017364] ? read_cache_page_gfp+0x20/0x20 [ 47.021629] ? nfs_file_read+0xa0/0xa0 [ 47.025372] ? nfs_readpage_async+0x2f0/0x2f0 [ 47.029725] unmap_page_range+0x3fe/0x740 [ 47.033740] unmap_single_vma+0x60/0xc0 [ 47.037576] unmap_vmas+0xb3/0x140 [ 47.040975] exit_mmap+0x80/0x160 [ 47.044295] mmput+0x56/0x100 [ 47.047266] do_exit+0x2f8/0xb40 [ 47.050498] rewind_stack_do_exit+0x11/0x13 [ 47.054673] EIP: 0xb7d37e10 [ 47.057467] Code: Bad RIP value. [ 47.060696] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2 [ 47.066953] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c [ 47.073211] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206 [ 47.080067] swap_info_get: Bad swap file entry 7007522e [ 47.085318] BUG: Bad page map in process systemd-journal pte:0ea45c3c pmd:8c4a6067 [ 47.092977] addr:b7e79000 vm_flags:00000075 anon_vma:00000000 mapping:f5008c20 index:12f [ 47.101065] file:libsystemd-shared-237.so fault:filemap_fault mmap:nfs_file_mmap readpage:nfs_readpage [ 47.110370] CPU: 3 PID: 324 Comm: systemd-journal Tainted: G B D W 5.6.0 #1 [ 47.118280] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.0b 07/27/2017 [ 47.125749] Call Trace: [ 47.128195] dump_stack+0x6e/0x96 [ 47.131514] ? nfs_readpage_async+0x2f0/0x2f0 [ 47.135871] print_bad_pte+0x11d/0x1b0 [ 47.139616] ? read_cache_page_gfp+0x20/0x20 [ 47.143880] ? nfs_file_read+0xa0/0xa0 [ 47.147623] ? nfs_readpage_async+0x2f0/0x2f0 [ 47.151977] unmap_page_range+0x3fe/0x740 [ 47.155990] unmap_single_vma+0x60/0xc0 [ 47.159827] unmap_vmas+0xb3/0x140 [ 47.163226] exit_mmap+0x80/0x160 [ 47.166547] mmput+0x56/0x100 [ 47.169516] do_exit+0x2f8/0xb40 [ 47.172749] rewind_stack_do_exit+0x11/0x13 [ 47.176935] EIP: 0xb7d37e10 [ 47.179725] Code: Bad RIP value. [ 47.182948] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2 [ 47.189204] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c [ 47.195464] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206 [ 47.202272] swap_info_get: Bad swap file entry 70077d2b [ 47.207505] BUG: Bad page map in process systemd-journal pte:0efa563c pmd:8c4a6067 [ 47.215165] addr:b7e9e000 vm_flags:00000075 anon_vma:00000000 mapping:f5008c20 index:154 [ 47.223253] file:libsystemd-shared-237.so fault:filemap_fault mmap:nfs_file_mmap readpage:nfs_readpage [ 47.232551] CPU: 3 PID: 324 Comm: systemd-journal Tainted: G B D W 5.6.0 #1 [ 47.240459] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.0b 07/27/2017 [ 47.247930] Call Trace: [ 47.250374] dump_stack+0x6e/0x96 [ 47.253686] ? nfs_readpage_async+0x2f0/0x2f0 [ 47.258036] print_bad_pte+0x11d/0x1b0 [ 47.261780] ? read_cache_page_gfp+0x20/0x20 [ 47.266045] ? nfs_file_read+0xa0/0xa0 [ 47.269788] ? nfs_readpage_async+0x2f0/0x2f0 [ 47.274141] unmap_page_range+0x3fe/0x740 [ 47.278154] unmap_single_vma+0x60/0xc0 [ 47.281991] unmap_vmas+0xb3/0x140 [ 47.285390] exit_mmap+0x80/0x160 [ 47.288710] mmput+0x56/0x100 [ 47.291681] do_exit+0x2f8/0xb40 [ 47.294915] rewind_stack_do_exit+0x11/0x13 [ 47.299098] EIP: 0xb7d37e10 [ 47.301888] Code: Bad RIP value. [ 47.305111] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2 [ 47.311370] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c [ 47.317628] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206 [ 47.324413] swap_info_get: Bad swap file entry 70077f2b [ 47.329650] BUG: Bad page map in process systemd-journal pte:0efe563c pmd:8c4a6067 [ 47.337303] addr:b7e9f000 vm_flags:00000075 anon_vma:00000000 mapping:f5008c20 index:155 [ 47.345392] file:libsystemd-shared-237.so fault:filemap_fault mmap:nfs_file_mmap readpage:nfs_readpage [ 47.354689] CPU: 3 PID: 324 Comm: systemd-journal Tainted: G B D W 5.6.0 #1 [ 47.362597] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.0b 07/27/2017 [ 47.370067] Call Trace: [ 47.372512] dump_stack+0x6e/0x96 [ 47.375824] ? nfs_readpage_async+0x2f0/0x2f0 [ 47.380174] print_bad_pte+0x11d/0x1b0 [ 47.383920] ? read_cache_page_gfp+0x20/0x20 [ 47.388191] ? nfs_file_read+0xa0/0xa0 [ 47.391936] ? nfs_readpage_async+0x2f0/0x2f0 [ 47.396295] unmap_page_range+0x3fe/0x740 [ 47.400301] unmap_single_vma+0x60/0xc0 [ 47.404139] unmap_vmas+0xb3/0x140 [ 47.407545] exit_mmap+0x80/0x160 [ 47.410866] mmput+0x56/0x100 [ 47.413836] do_exit+0x2f8/0xb40 [ 47.417062] rewind_stack_do_exit+0x11/0x13 [ 47.421246] EIP: 0xb7d37e10 [ 47.424037] Code: Bad RIP value. [ 47.427267] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2 [ 47.433527] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c [ 47.439783] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206 [ 47.446566] swap_info_get: Bad swap file entry 70077a2a [ 47.451800] BUG: Bad page map in process systemd-journal pte:0ef4543c pmd:8c4a6067 [ 47.459450] addr:b7ea0000 vm_flags:00000075 anon_vma:00000000 mapping:f5008c20 index:156 [ 47.467539] file:libsystemd-shared-237.so fault:filemap_fault mmap:nfs_file_mmap readpage:nfs_readpage [ 47.476836] CPU: 3 PID: 324 Comm: systemd-journal Tainted: G B D W 5.6.0 #1 [ 47.484745] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.0b 07/27/2017 [ 47.492214] Call Trace: [ 47.494660] dump_stack+0x6e/0x96 [ 47.497970] ? nfs_readpage_async+0x2f0/0x2f0 [ 47.502323] print_bad_pte+0x11d/0x1b0 [ 47.506076] ? read_cache_page_gfp+0x20/0x20 [ 47.510345] ? nfs_file_read+0xa0/0xa0 [ 47.514091] ? nfs_readpage_async+0x2f0/0x2f0 [ 47.518442] unmap_page_range+0x3fe/0x740 [ 47.522458] unmap_single_vma+0x60/0xc0 [ 47.526294] unmap_vmas+0xb3/0x140 [ 47.529693] exit_mmap+0x80/0x160 [ 47.533012] mmput+0x56/0x100 [ 47.535982] do_exit+0x2f8/0xb40 [ 47.539207] rewind_stack_do_exit+0x11/0x13 [ 47.543384] EIP: 0xb7d37e10 [ 47.546172] Code: Bad RIP value. [ 47.549396] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2 [ 47.555657] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c [ 47.561920] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206 [ 47.568712] swap_info_get: Bad swap file entry 7007444a [ 47.573944] BUG: Bad page map in process systemd-journal pte:0e88943c pmd:8c4a6067 [ 47.581598] addr:b7f81000 vm_flags:00000875 anon_vma:00000000 mapping:f5008360 index:4 [ 47.589510] file:ld-2.27.so fault:filemap_fault mmap:nfs_file_mmap readpage:nfs_readpage [ 47.597597] CPU: 3 PID: 324 Comm: systemd-journal Tainted: G B D W 5.6.0 #1 [ 47.605505] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.0b 07/27/2017 [ 47.612974] Call Trace: [ 47.615419] dump_stack+0x6e/0x96 [ 47.618731] ? nfs_readpage_async+0x2f0/0x2f0 [ 47.623083] print_bad_pte+0x11d/0x1b0 [ 47.626834] ? read_cache_page_gfp+0x20/0x20 [ 47.631099] ? nfs_file_read+0xa0/0xa0 [ 47.634843] ? nfs_readpage_async+0x2f0/0x2f0 [ 47.639201] unmap_page_range+0x3fe/0x740 [ 47.643209] unmap_single_vma+0x60/0xc0 [ 47.647045] unmap_vmas+0xb3/0x140 [ 47.650445] exit_mmap+0x80/0x160 [ 47.653764] mmput+0x56/0x100 [ 47.656735] do_exit+0x2f8/0xb40 [ 47.659969] rewind_stack_do_exit+0x11/0x13 [ 47.664150] EIP: 0xb7d37e10 [ 47.666941] Code: Bad RIP value. [ 47.670166] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2 [ 47.676425] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c [ 47.682682] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206 [ 47.689464] swap_info_get: Bad swap file entry 700742c6 [ 47.694686] BUG: Bad page map in process systemd-journal pte:0e858c3c pmd:8c4a6067 [ 47.702339] addr:b7f82000 vm_flags:00000875 anon_vma:00000000 mapping:f5008360 index:5 [ 47.710255] file:ld-2.27.so fault:filemap_fault mmap:nfs_file_mmap readpage:nfs_readpage [ 47.718338] CPU: 3 PID: 324 Comm: systemd-journal Tainted: G B D W 5.6.0 #1 [ 47.726248] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.0b 07/27/2017 [ 47.733718] Call Trace: [ 47.736163] dump_stack+0x6e/0x96 [ 47.739473] ? nfs_readpage_async+0x2f0/0x2f0 [ 47.743824] print_bad_pte+0x11d/0x1b0 [ 47.747570] ? read_cache_page_gfp+0x20/0x20 [ 47.751841] ? nfs_file_read+0xa0/0xa0 [ 47.755585] ? nfs_readpage_async+0x2f0/0x2f0 [ 47.759937] unmap_page_range+0x3fe/0x740 [ 47.763953] unmap_single_vma+0x60/0xc0 [ 47.767789] unmap_vmas+0xb3/0x140 [ 47.771196] exit_mmap+0x80/0x160 [ 47.774515] mmput+0x56/0x100 [ 47.777485] do_exit+0x2f8/0xb40 [ 47.780712] rewind_stack_do_exit+0x11/0x13 [ 47.784896] EIP: 0xb7d37e10 [ 47.787694] Code: Bad RIP value. [ 47.790918] EAX: 00080042 EBX: b7f712e4 ECX: 00000002 EDX: 007bfdf2 [ 47.797176] ESI: 007ca2f0 EDI: bfe70860 EBP: 007bec30 ESP: bfe7058c [ 47.803432] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010206 [ 47.810255] BUG: Bad rss-counter state mm:6923ef64 type:MM_FILEPAGES val:12 [ 47.817226] BUG: Bad rss-counter state mm:6923ef64 type:MM_SWAPENTS val:-12 [ 47.832458] get_swap_device: Bad swap file entry 7007a82a [ 47.837875] BUG: kernel NULL pointer dereference, address: 00000000 [ 47.844150] #PF: supervisor read access in kernel mode [ 47.849289] #PF: error_code(0x0000) - not-present page [ 47.854427] *pde = 00000000 [ 47.857304] Oops: 0000 [#2] SMP [ 47.860444] CPU: 1 PID: 1 Comm: systemd Tainted: G B D W 5.6.0 #1 [ 47.867488] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.0b 07/27/2017 [ 47.874962] EIP: do_swap_page+0x172/0x9d0 [ 47.878971] Code: 00 8b 4d f0 65 33 0d 14 00 00 00 8b 45 e0 0f 85 6c 08 00 00 8d 65 f4 5b 5e 5f 5d c3 8d 74 26 00 8b 75 e4 89 f0 e8 9e 0e 02 00 <8b> 00 f6 c4 10 74 10 89 f0 e8 30 dd 01 00 83 f8 01 0f 84 a7 04 00 [ 47.897707] EAX: 00000000 EBX: f555df28 ECX: cb161967 EDX: 00000000 [ 47.903964] ESI: 7007a82a EDI: 00000000 EBP: f555df08 ESP: f555ded0 [ 47.910223] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010246 [ 47.917001] CR0: 80050033 CR2: 00000000 CR3: 3313b000 CR4: 003406d0 [ 47.923257] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 47.929515] DR6: fffe0ff0 DR7: 00000400 [ 47.933344] Call Trace: [ 47.935790] ? handle_mm_fault+0xca/0xcf0 [ 47.939804] handle_mm_fault+0x430/0xcf0 [ 47.943731] ? security_file_free+0x4e/0x60 [ 47.947918] do_page_fault+0x1ab/0x620 [ 47.951669] ? vmalloc_sync+0x180/0x180 [ 47.955505] common_exception_read_cr2+0x15f/0x164 [ 47.960289] EIP: 0xb7a3d0f6 [ 47.963081] Code: c0 74 08 38 d8 75 04 39 fe 75 e9 0f b6 fb 5b 29 f8 5e 5f c3 56 57 8b 7c 24 0c 31 c0 89 f9 83 e1 3f 66 0f ef c0 83 f9 30 77 17 <f3> 0f 6f 0f 66 0f 74 c1 66 0f d7 d0 85 d2 75 73 89 f8 83 e0 f0 eb [ 47.981816] EAX: 00000000 EBX: b7ed02e4 ECX: 00000025 EDX: 012e13dc [ 47.988073] ESI: 005c34a5 EDI: 005c34a5 EBP: 005c34a5 ESP: bfe689d4 [ 47.994332] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010287 [ 48.001111] Modules linked in: x86_pkg_temp_thermal fuse [ 48.006424] CR2: 0000000000000000 [ 48.009742] ---[ end trace 27c0fb4a809b98f7 ]--- [ 48.014362] EIP: do_swap_page+0x172/0x9d0 [ 48.018373] Code: 00 8b 4d f0 65 33 0d 14 00 00 00 8b 45 e0 0f 85 6c 08 00 00 8d 65 f4 5b 5e 5f 5d c3 8d 74 26 00 8b 75 e4 89 f0 e8 9e 0e 02 00 <8b> 00 f6 c4 10 74 10 89 f0 e8 30 dd 01 00 83 f8 01 0f 84 a7 04 00 [ 48.037111] EAX: 00000000 EBX: f3739f28 ECX: f590e840 EDX: 00000000 [ 48.043367] ESI: 7007504a EDI: 00000000 EBP: f3739f08 ESP: f3739ed0 [ 48.049624] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010246 [ 48.056402] CR0: 80050033 CR2: 00000000 CR3: 3313b000 CR4: 003406d0 [ 48.062658] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 48.068916] DR6: fffe0ff0 DR7: 00000400 [ 48.072746] BUG: sleeping function called from invalid context at /usr/src/kernel/include/linux/percpu-rwsem.h:49 [ 48.082990] in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 1, name: systemd [ 48.090634] INFO: lockdep is turned off. [ 48.094576] irq event stamp: 2162056 [ 48.098150] hardirqs last enabled at (2162055): [<cbe036a2>] _raw_write_unlock_irq+0x22/0x30 [ 48.106670] hardirqs last disabled at (2162056): [<cbdfcc4f>] __schedule+0xbf/0x970 [ 48.114322] softirqs last enabled at (2161816): [<cbc34343>] unix_sock_destructor+0x63/0x100 [ 48.122831] softirqs last disabled at (2161814): [<cbc34343>] unix_sock_destructor+0x63/0x100 [ 48.131341] CPU: 1 PID: 1 Comm: systemd Tainted: G B D W 5.6.0 #1 [ 48.138378] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.0b 07/27/2017 [ 48.145849] Call Trace: [ 48.148294] dump_stack+0x6e/0x96 [ 48.151606] ___might_sleep+0x14d/0x240 [ 48.155438] __might_sleep+0x33/0x80 [ 48.159017] exit_signals+0x2a/0x2d0 [ 48.162596] do_exit+0x8e/0xb40 [ 48.165741] rewind_stack_do_exit+0x11/0x13 [ 48.169916] EIP: 0xb7a3d0f6 [ 48.172709] Code: c0 74 08 38 d8 75 04 39 fe 75 e9 0f b6 fb 5b 29 f8 5e 5f c3 56 57 8b 7c 24 0c 31 c0 89 f9 83 e1 3f 66 0f ef c0 83 f9 30 77 17 <f3> 0f 6f 0f 66 0f 74 c1 66 0f d7 d0 85 d2 75 73 89 f8 83 e0 f0 eb [ 48.191452] EAX: 00000000 EBX: b7ed02e4 ECX: 00000025 EDX: 012e13dc [ 48.197711] ESI: 005c34a5 EDI: 005c34a5 EBP: 005c34a5 ESP: bfe689d4 [ 48.203968] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00010287 [ 48.210748] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009 [ 48.218422] Kernel Offset: 0xa000000 from 0xc1000000 (relocation range: 0xc0000000-0xf77fdfff) [ 48.227030] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009 ]---
git repo: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git branch: master kernel-config: http://snapshots.linaro.org/openembedded/lkft/lkft/sumo/intel-core2-32/lkft/...
git log --oneline compaction.c 77337edee759 mm/compaction: add missing annotation for compact_lock_irqsave 9de4f22a60f7 mm: code cleanup for MADV_FREE 250046e7ba2a mm/compaction.c: clean code by removing unnecessary assignment 6923aa0d8c62 mm/compaction: Disable compact_unevictable_allowed on RT 6467552ca64c mm, compaction: fully assume capture is not NULL in compact_zone_order() 1da2f328fa64 mm,thp,compaction,cma: allow THP migration for CMA allocations a2e9a5afce08 mm, compaction: fix wrong pfn handling in __reset_isolation_pfn() 32aaf0553df9 mm/compaction.c: remove unnecessary zone parameter in isolate_migratepages() a94b525241c0 mm/compaction.c: clear total_{migrate,free}_scanned before scanning a new zone d8c6546b1aea mm: introduce compound_nr()
full test log, https://lkft.validation.linaro.org/scheduler/job/1360870
Reported-by: Naresh Kamboju naresh.kamboju@linaro.org
Hi, Naresh,
On Sun, Apr 12, 2020 at 12:24:57PM +0530, Naresh Kamboju wrote:
On Linux mainline kernel 5.6.0 running kselftest vm compaction_test on i386 kernel running on x86_64 devices we have noticed this Kernel BUG followed by Kernel panic.
BUG: kernel NULL pointer dereference, address: 00000000 Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009
Steps to reproduce:
# cd /opt/kselftests/default-in-kernel/vm/ # ./compaction_test
[ 45.955706] kauditd_printk_skb: 15 callbacks suppressed [ 45.955707] audit: type=1334 audit(1586671685.974:25): prog-id=13 op=UNLOAD [ 45.968082] audit: type=1334 audit(1586671685.974:26): prog-id=12 op=UNLOAD [ 46.008163] get_swap_device: Bad swap file entry 7007504a [ 46.013647] BUG: kernel NULL pointer dereference, address: 00000000
I suspect this is the same issue with:
https://lore.kernel.org/lkml/20200410002518.GG8179@shao2-debian/
And since this one is very easy to reproduce, I finally noticed that we have wrongly enabled uffd-wp on x86_32, which is definely not going to work... Because we'll use bit 2 of swap entry assuming that's the uffd-wp bit, while that's part of swp offset on 32bit systems.
Naresh, could you try whether below change fixes the issue for you?
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 8d078642b4be..7ac524d1316e 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -149,7 +149,7 @@ config X86 select HAVE_ARCH_TRACEHOOK select HAVE_ARCH_TRANSPARENT_HUGEPAGE select HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD if X86_64 - select HAVE_ARCH_USERFAULTFD_WP if USERFAULTFD + select HAVE_ARCH_USERFAULTFD_WP if X86_64 && USERFAULTFD select HAVE_ARCH_VMAP_STACK if X86_64 select HAVE_ARCH_WITHIN_STACK_FRAMES select HAVE_ASM_MODVERSIONS
Thanks,
On Mon, 13 Apr 2020 at 03:12, Peter Xu peterx@redhat.com wrote:
And since this one is very easy to reproduce, I finally noticed that we have wrongly enabled uffd-wp on x86_32, which is definely not going to work... Because we'll use bit 2 of swap entry assuming that's the uffd-wp bit, while that's part of swp offset on 32bit systems.
Naresh, could you try whether below change fixes the issue for you?
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 8d078642b4be..7ac524d1316e 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -149,7 +149,7 @@ config X86 select HAVE_ARCH_TRACEHOOK select HAVE_ARCH_TRANSPARENT_HUGEPAGE select HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD if X86_64
select HAVE_ARCH_USERFAULTFD_WP if USERFAULTFD
select HAVE_ARCH_USERFAULTFD_WP if X86_64 && USERFAULTFD select HAVE_ARCH_VMAP_STACK if X86_64 select HAVE_ARCH_WITHIN_STACK_FRAMES select HAVE_ASM_MODVERSIONS
Tested-by: Naresh Kamboju naresh.kamboju@linaro.org
The above patch tested and did not notice the crash. + cd /opt/kselftests/default-in-kernel/vm/ + ./compaction_test No of huge pages allocated = 297 + ./compaction_test [ 46.059785] kauditd_printk_skb: 15 callbacks suppressed [ 46.059786] audit: type=1334 audit(1586776582.927:25): prog-id=17 op=UNLOAD [ 46.071997] audit: type=1334 audit(1586776582.927:26): prog-id=16 op=UNLOAD No of huge pages allocated = 160
Full test log, https://lkft.validation.linaro.org/scheduler/job/1362495#L1308
Build artifacts. https://builds.tuxbuild.com/w0ol7cCsGan0wzPp7bNqkg/
- Naresh
On Mon, Apr 13, 2020 at 04:51:25PM +0530, Naresh Kamboju wrote:
On Mon, 13 Apr 2020 at 03:12, Peter Xu peterx@redhat.com wrote:
And since this one is very easy to reproduce, I finally noticed that we have wrongly enabled uffd-wp on x86_32, which is definely not going to work... Because we'll use bit 2 of swap entry assuming that's the uffd-wp bit, while that's part of swp offset on 32bit systems.
Naresh, could you try whether below change fixes the issue for you?
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 8d078642b4be..7ac524d1316e 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -149,7 +149,7 @@ config X86 select HAVE_ARCH_TRACEHOOK select HAVE_ARCH_TRANSPARENT_HUGEPAGE select HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD if X86_64
select HAVE_ARCH_USERFAULTFD_WP if USERFAULTFD
select HAVE_ARCH_USERFAULTFD_WP if X86_64 && USERFAULTFD select HAVE_ARCH_VMAP_STACK if X86_64 select HAVE_ARCH_WITHIN_STACK_FRAMES select HAVE_ASM_MODVERSIONSTested-by: Naresh Kamboju naresh.kamboju@linaro.org
The above patch tested and did not notice the crash.
- cd /opt/kselftests/default-in-kernel/vm/
- ./compaction_test
No of huge pages allocated = 297
- ./compaction_test
[ 46.059785] kauditd_printk_skb: 15 callbacks suppressed [ 46.059786] audit: type=1334 audit(1586776582.927:25): prog-id=17 op=UNLOAD [ 46.071997] audit: type=1334 audit(1586776582.927:26): prog-id=16 op=UNLOAD No of huge pages allocated = 160
Full test log, https://lkft.validation.linaro.org/scheduler/job/1362495#L1308
Build artifacts. https://builds.tuxbuild.com/w0ol7cCsGan0wzPp7bNqkg/
Thanks! I'll post a formal patch soon.
On 4/11/20 11:54 PM, Naresh Kamboju wrote:
On Linux mainline kernel 5.6.0 running kselftest vm compaction_test on i386 kernel running on x86_64 devices we have noticed this Kernel BUG followed by Kernel panic.
Any chance we could talk you into doing a bisect on this sucker?
The "Bad swap file entry" message could be a lot of things.
linux-kselftest-mirror@lists.linaro.org
-
Dave Hansen -
Naresh Kamboju -
Peter Xu