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Tue, 05 Nov 2024 02:33:25 -0800 (PST) Date: Tue, 05 Nov 2024 02:33:25 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6729f475.050a0220.701a.0019.GAE@google.com> Subject: [syzbot] [mm?] BUG: Bad page state in kvm_coalesced_mmio_init From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: C99D8120023 X-Stat-Signature: y71cp1heyzppfuwspkxko8jybrbm9c6t X-Rspam-User: X-Rspamd-Server: rspam05 X-HE-Tag: 1730802761-333096 X-HE-Meta: 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 f0kwMLYh 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 g8/whzxW 2Uk5OTXKfYPvfXSA5XLlLanH4OWgTz9rwLae9jKdu+4SWH/b6ydzbEUH8ihnbZ03O7kak9DcvukIQs36fj07ODbto0JV2FFhCxo8ZZol9mdZI/unpKjaycb1q7Ny2dqwCHg+XLj7gnlh6yic8rbVS9fwbcABDB1U5jhrqRpVAyzSJLtLCDAlxWfjNc4Cjz3K5QCqw0rNvm8DGYfxwShpeTVFiuSs2NP8ShGFdlW2miVmM1xEK1jBSaG3UWKIBsmVJAVQyMuz8+mxVtV4uJGzobbalnDZ1eDIKLi3cttDg7vuOaVprP84uZStsWV+x9cmi3SwlgROaiwamSfLgBKTbREetlzQESKEN/hYbzWrUO4wYB0WhVYEfVOoFOESOVMUsn0RN4ugjyX4MZOzA+wODykCKwZKkNV1 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello, syzbot found the following issue on: HEAD commit: 59b723cd2adb Linux 6.12-rc6 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17996587980000 kernel config: https://syzkaller.appspot.com/x/.config?x=11254d3590b16717 dashboard link: https://syzkaller.appspot.com/bug?extid=e985d3026c4fd041578e compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/202d791be971/disk-59b723cd.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/9bfa02908d87/vmlinux-59b723cd.xz kernel image: https://storage.googleapis.com/syzbot-assets/93c8c8740b4d/bzImage-59b723cd.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e985d3026c4fd041578e@syzkaller.appspotmail.com BUG: Bad page state in process syz.5.504 pfn:61f45 page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x61f45 flags: 0xfff00000080204(referenced|workingset|mlocked|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000080204 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x400dc0(GFP_KERNEL_ACCOUNT|__GFP_ZERO), pid 8443, tgid 8442 (syz.5.504), ts 201884660643, free_ts 201499827394 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0x303f/0x3190 mm/page_alloc.c:3457 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4733 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 kvm_coalesced_mmio_init+0x1f/0xf0 virt/kvm/coalesced_mmio.c:99 kvm_create_vm virt/kvm/kvm_main.c:1235 [inline] kvm_dev_ioctl_create_vm virt/kvm/kvm_main.c:5488 [inline] kvm_dev_ioctl+0x12dc/0x2240 virt/kvm/kvm_main.c:5530 __do_compat_sys_ioctl fs/ioctl.c:1007 [inline] __se_compat_sys_ioctl+0x510/0xc90 fs/ioctl.c:950 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0xb4/0x110 arch/x86/entry/common.c:386 do_fast_syscall_32+0x34/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e page last free pid 8399 tgid 8399 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1108 [inline] free_unref_folios+0xf12/0x18d0 mm/page_alloc.c:2686 folios_put_refs+0x76c/0x860 mm/swap.c:1007 free_pages_and_swap_cache+0x5c8/0x690 mm/swap_state.c:335 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline] tlb_batch_pages_flush mm/mmu_gather.c:149 [inline] tlb_flush_mmu_free mm/mmu_gather.c:366 [inline] tlb_flush_mmu+0x3a3/0x680 mm/mmu_gather.c:373 tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:465 exit_mmap+0x496/0xc40 mm/mmap.c:1926 __mmput+0x115/0x390 kernel/fork.c:1348 exit_mm+0x220/0x310 kernel/exit.c:571 do_exit+0x9b2/0x28e0 kernel/exit.c:926 do_group_exit+0x207/0x2c0 kernel/exit.c:1088 __do_sys_exit_group kernel/exit.c:1099 [inline] __se_sys_exit_group kernel/exit.c:1097 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1097 x64_sys_call+0x2634/0x2640 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Modules linked in: CPU: 0 UID: 0 PID: 8442 Comm: syz.5.504 Not tainted 6.12.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 bad_page+0x176/0x1d0 mm/page_alloc.c:501 free_page_is_bad mm/page_alloc.c:918 [inline] free_pages_prepare mm/page_alloc.c:1100 [inline] free_unref_page+0xed0/0xf20 mm/page_alloc.c:2638 kvm_destroy_vm virt/kvm/kvm_main.c:1327 [inline] kvm_put_kvm+0xc75/0x1350 virt/kvm/kvm_main.c:1386 kvm_vcpu_release+0x54/0x60 virt/kvm/kvm_main.c:4143 __fput+0x23f/0x880 fs/file_table.c:431 task_work_run+0x24f/0x310 kernel/task_work.c:239 exit_task_work include/linux/task_work.h:43 [inline] do_exit+0xa2f/0x28e0 kernel/exit.c:939 do_group_exit+0x207/0x2c0 kernel/exit.c:1088 __do_sys_exit_group kernel/exit.c:1099 [inline] __se_sys_exit_group kernel/exit.c:1097 [inline] __ia32_sys_exit_group+0x3f/0x40 kernel/exit.c:1097 ia32_sys_call+0x2624/0x2630 arch/x86/include/generated/asm/syscalls_32.h:253 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0xb4/0x110 arch/x86/entry/common.c:386 do_fast_syscall_32+0x34/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf745d579 Code: Unable to access opcode bytes at 0xf745d54f. RSP: 002b:00000000f75afd6c EFLAGS: 00000206 ORIG_RAX: 00000000000000fc RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 00000000ffffff9c RDI: 00000000f744cff4 RBP: 00000000f717ae61 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup