Hello, When using Healer to fuzz the Linux kernel, the following crash was triggered on: HEAD commit: fdf0eaf11452d72945af31804e2a1048ee1b574c (tag: v6.5-rc2) git tree: upstream I tried to reproduce this bug on v6.5-rc3(HEAD commit: 6eaae198076080886b9e7d57f4ae06fa782f90ef), it still exists. console output: https://drive.google.com/file/d/1Lq71bFwtEDix82PEf_193CLG6uh1Pjj9/view?usp=drive_link kernel config: https://drive.google.com/file/d/1dApy7OR4KDYdhF96ZUowZQ1r-uLYTd-0/view?usp=drive_link C reproducer: https://drive.google.com/file/d/1Dkj31wwYP7p-AEJeemD3yrIUr7-VdBqF/view?usp=drive_link Syzlang reproducer: https://drive.google.com/file/d/1ib6zTs4srKI1RnUcHG3mSZ5HeW7rZhnd/view?usp=drive_link If you fix this issue, please add the following tag to the commit: Reported-by: Yikebaer Aizezi <yikebaer61@xxxxxxxxx> WARNING: CPU: 0 PID: 10232 at mm/gup.c:229 try_grab_page+0x2dd/0x3a0 mm/gup.c:229 Modules linked in: CPU: 0 PID: 10232 Comm: syz-executor Tainted: G B 6.5.0-rc2 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 RIP: 0010:try_grab_page+0x2dd/0x3a0 mm/gup.c:229 Code: ff be 04 00 00 00 4c 89 e7 e8 cf fa 13 00 f0 41 ff 04 24 e8 65 96 cb ff 45 31 e4 5b 44 89 e0 5d 41 5c 41 5d c3 e8 53 96 cb ff <0f> 0b e8 4c 96 cb ff 41 bc f4 ff ff ff 5b 44 89 e0 5d 41 5c 41 5d RSP: 0018:ffffc9000e99f268 EFLAGS: 00010202 RAX: 0000000000002f80 RBX: ffffea00003ae340 RCX: ffffc90002d79000 RDX: 0000000000040000 RSI: ffffffff81ad81ed RDI: ffffea00003ae374 RBP: ffffea00003ae340 R08: 0000000000000000 R09: fffff94000075c6e R10: ffffea00003ae377 R11: 0000000000000000 R12: ffffea00003ae374 R13: 0000000000210052 R14: ffffea00003ae340 R15: 000000000eb8d225 FS: 00007fc6339a4640(0000) GS:ffff888063e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000002c3ea000 CR4: 0000000000752ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: <TASK> follow_page_pte+0x18c/0x1610 mm/gup.c:651 follow_pmd_mask mm/gup.c:727 [inline] follow_pud_mask mm/gup.c:765 [inline] follow_p4d_mask mm/gup.c:782 [inline] follow_page_mask+0x2e4/0xbd0 mm/gup.c:839 __get_user_pages+0x3fa/0xcf0 mm/gup.c:1256 __get_user_pages_locked mm/gup.c:1487 [inline] get_user_pages_unlocked+0x183/0x580 mm/gup.c:2387 hva_to_pfn_slow arch/x86/kvm/../../../virt/kvm/kvm_main.c:2536 [inline] hva_to_pfn+0x198/0xbc0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2674 __gfn_to_pfn_memslot+0x202/0x3e0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2736 __kvm_faultin_pfn arch/x86/kvm/mmu/mmu.c:4329 [inline] kvm_faultin_pfn+0x21b/0x12d0 arch/x86/kvm/mmu/mmu.c:4365 kvm_tdp_mmu_page_fault arch/x86/kvm/mmu/mmu.c:4503 [inline] kvm_tdp_page_fault+0x167/0x4d0 arch/x86/kvm/mmu/mmu.c:4549 kvm_mmu_do_page_fault arch/x86/kvm/mmu/mmu_internal.h:320 [inline] kvm_mmu_page_fault+0x2f4/0x1a40 arch/x86/kvm/mmu/mmu.c:5756 handle_ept_violation+0x20a/0x620 arch/x86/kvm/vmx/vmx.c:5760 __vmx_handle_exit arch/x86/kvm/vmx/vmx.c:6539 [inline] vmx_handle_exit+0x4a1/0x18d0 arch/x86/kvm/vmx/vmx.c:6556 vcpu_enter_guest arch/x86/kvm/x86.c:10848 [inline] vcpu_run+0x24b6/0x44b0 arch/x86/kvm/x86.c:10951 kvm_arch_vcpu_ioctl_run+0x416/0x1830 arch/x86/kvm/x86.c:11172 kvm_vcpu_ioctl+0x4de/0xcc0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4112 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x173/0x1e0 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x47959d Code: 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b4 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc6339a4068 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000059c0a0 RCX: 000000000047959d RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006 RBP: 000000000059c0a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000059c0ac R13: 000000000000000b R14: 0000000000437250 R15: 00007fc633984000 </TASK> Modules linked in: CPU: 0 PID: 10232 Comm: syz-executor Tainted: G B 6.5.0-rc2 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 RIP: 0010:try_grab_page+0x2dd/0x3a0 mm/gup.c:229 Code: ff be 04 00 00 00 4c 89 e7 e8 cf fa 13 00 f0 41 ff 04 24 e8 65 96 cb ff 45 31 e4 5b 44 89 e0 5d 41 5c 41 5d c3 e8 53 96 cb ff <0f> 0b e8 4c 96 cb ff 41 bc f4 ff ff ff 5b 44 89 e0 5d 41 5c 41 5d RSP: 0018:ffffc9000e99f268 EFLAGS: 00010202 RAX: 0000000000002f80 RBX: ffffea00003ae340 RCX: ffffc90002d79000 RDX: 0000000000040000 RSI: ffffffff81ad81ed RDI: ffffea00003ae374 RBP: ffffea00003ae340 R08: 0000000000000000 R09: fffff94000075c6e R10: ffffea00003ae377 R11: 0000000000000000 R12: ffffea00003ae374 R13: 0000000000210052 R14: ffffea00003ae340 R15: 000000000eb8d225 FS: 00007fc6339a4640(0000) GS:ffff888063e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000002c3ea000 CR4: 0000000000752ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: <TASK> follow_page_pte+0x18c/0x1610 mm/gup.c:651 follow_pmd_mask mm/gup.c:727 [inline] follow_pud_mask mm/gup.c:765 [inline] follow_p4d_mask mm/gup.c:782 [inline] follow_page_mask+0x2e4/0xbd0 mm/gup.c:839 __get_user_pages+0x3fa/0xcf0 mm/gup.c:1256 __get_user_pages_locked mm/gup.c:1487 [inline] get_user_pages_unlocked+0x183/0x580 mm/gup.c:2387 hva_to_pfn_slow arch/x86/kvm/../../../virt/kvm/kvm_main.c:2536 [inline] hva_to_pfn+0x198/0xbc0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2674 __gfn_to_pfn_memslot+0x202/0x3e0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2736 __kvm_faultin_pfn arch/x86/kvm/mmu/mmu.c:4329 [inline] kvm_faultin_pfn+0x21b/0x12d0 arch/x86/kvm/mmu/mmu.c:4365 kvm_tdp_mmu_page_fault arch/x86/kvm/mmu/mmu.c:4503 [inline] kvm_tdp_page_fault+0x167/0x4d0 arch/x86/kvm/mmu/mmu.c:4549 kvm_mmu_do_page_fault arch/x86/kvm/mmu/mmu_internal.h:320 [inline] kvm_mmu_page_fault+0x2f4/0x1a40 arch/x86/kvm/mmu/mmu.c:5756 handle_ept_violation+0x20a/0x620 arch/x86/kvm/vmx/vmx.c:5760 __vmx_handle_exit arch/x86/kvm/vmx/vmx.c:6539 [inline] vmx_handle_exit+0x4a1/0x18d0 arch/x86/kvm/vmx/vmx.c:6556 vcpu_enter_guest arch/x86/kvm/x86.c:10848 [inline] vcpu_run+0x24b6/0x44b0 arch/x86/kvm/x86.c:10951 kvm_arch_vcpu_ioctl_run+0x416/0x1830 arch/x86/kvm/x86.c:11172 kvm_vcpu_ioctl+0x4de/0xcc0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4112 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x173/0x1e0 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x47959d Code: 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b4 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc6339a4068 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000059c0a0 RCX: 000000000047959d RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006 RBP: 000000000059c0a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000059c0ac R13: 000000000000000b R14: 0000000000437250 R15: 00007fc633984000 </TASK> Kernel panic - not syncing: kernel: panic_on_warn set ... CPU: 0 PID: 10232 Comm: syz-executor Tainted: G B 6.5.0-rc2 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x92/0xf0 lib/dump_stack.c:106 panic+0x570/0x620 kernel/panic.c:340 check_panic_on_warn+0x8e/0x90 kernel/panic.c:236 __warn+0xee/0x340 kernel/panic.c:673 __report_bug lib/bug.c:199 [inline] report_bug+0x25d/0x460 lib/bug.c:219 handle_bug+0x3c/0x70 arch/x86/kernel/traps.c:324 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:345 asm_exc_invalid_op+0x16/0x20 arch/x86/include/asm/idtentry.h:568 RIP: 0010:try_grab_page+0x2dd/0x3a0 mm/gup.c:229 Code: ff be 04 00 00 00 4c 89 e7 e8 cf fa 13 00 f0 41 ff 04 24 e8 65 96 cb ff 45 31 e4 5b 44 89 e0 5d 41 5c 41 5d c3 e8 53 96 cb ff <0f> 0b e8 4c 96 cb ff 41 bc f4 ff ff ff 5b 44 89 e0 5d 41 5c 41 5d RSP: 0018:ffffc9000e99f268 EFLAGS: 00010202 RAX: 0000000000002f80 RBX: ffffea00003ae340 RCX: ffffc90002d79000 RDX: 0000000000040000 RSI: ffffffff81ad81ed RDI: ffffea00003ae374 RBP: ffffea00003ae340 R08: 0000000000000000 R09: fffff94000075c6e R10: ffffea00003ae377 R11: 0000000000000000 R12: ffffea00003ae374 R13: 0000000000210052 R14: ffffea00003ae340 R15: 000000000eb8d225 follow_page_pte+0x18c/0x1610 mm/gup.c:651 follow_pmd_mask mm/gup.c:727 [inline] follow_pud_mask mm/gup.c:765 [inline] follow_p4d_mask mm/gup.c:782 [inline] follow_page_mask+0x2e4/0xbd0 mm/gup.c:839 __get_user_pages+0x3fa/0xcf0 mm/gup.c:1256 __get_user_pages_locked mm/gup.c:1487 [inline] get_user_pages_unlocked+0x183/0x580 mm/gup.c:2387 hva_to_pfn_slow arch/x86/kvm/../../../virt/kvm/kvm_main.c:2536 [inline] hva_to_pfn+0x198/0xbc0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2674 __gfn_to_pfn_memslot+0x202/0x3e0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2736 __kvm_faultin_pfn arch/x86/kvm/mmu/mmu.c:4329 [inline] kvm_faultin_pfn+0x21b/0x12d0 arch/x86/kvm/mmu/mmu.c:4365 kvm_tdp_mmu_page_fault arch/x86/kvm/mmu/mmu.c:4503 [inline] kvm_tdp_page_fault+0x167/0x4d0 arch/x86/kvm/mmu/mmu.c:4549 kvm_mmu_do_page_fault arch/x86/kvm/mmu/mmu_internal.h:320 [inline] kvm_mmu_page_fault+0x2f4/0x1a40 arch/x86/kvm/mmu/mmu.c:5756 handle_ept_violation+0x20a/0x620 arch/x86/kvm/vmx/vmx.c:5760 __vmx_handle_exit arch/x86/kvm/vmx/vmx.c:6539 [inline] vmx_handle_exit+0x4a1/0x18d0 arch/x86/kvm/vmx/vmx.c:6556 vcpu_enter_guest arch/x86/kvm/x86.c:10848 [inline] vcpu_run+0x24b6/0x44b0 arch/x86/kvm/x86.c:10951 kvm_arch_vcpu_ioctl_run+0x416/0x1830 arch/x86/kvm/x86.c:11172 kvm_vcpu_ioctl+0x4de/0xcc0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4112 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x173/0x1e0 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x47959d Code: 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b4 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc6339a4068 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000059c0a0 RCX: 000000000047959d RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006 RBP: 000000000059c0a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000059c0ac R13: 000000000000000b R14: 0000000000437250 R15: 00007fc633984000 </TASK> Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 1 seconds..
