Hello, I'm sorry for the mistake in my previous email. I forgot to add a subject. This is my second attempt to send the message. When using Healer to fuzz the latest Linux kernel, the following crash was triggered. HEAD commit: fdf0eaf11452d72945af31804e2a1048ee1b574c (tag: v6.5-rc2) git tree: upstream console output: https://drive.google.com/file/d/1FiemC_AWRT-6EGscpQJZNzYhXZty6BVr/view?usp=drive_link kernel config: https://drive.google.com/file/d/1fgPLKOw7QbKzhK6ya5KUyKyFhumQgunw/view?usp=drive_link C reproducer: https://drive.google.com/file/d/1SiLpYTZ7Du39ubgf1k1BIPlu9ZvMjiWZ/view?usp=drive_link Syzlang reproducer: https://drive.google.com/file/d/1eWSmwvNGOlZNU-0-xsKhUgZ4WG2VLZL5/view?usp=drive_link Similar report: https://groups.google.com/g/syzkaller-bugs/c/C2ud-S1Thh0/m/z4iI7l_dAgAJ If you fix this issue, please add the following tag to the commit: Reported-by: Yikebaer Aizezi <yikebaer61@xxxxxxxxx> kvm: vcpu 129: requested lapic timer restore with starting count register 0x390=4241646265 (4241646265 ns) > initial count (296265111 ns). Using initial count to start timer. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1977 at arch/x86/kvm/x86.c:11098 kvm_arch_vcpu_ioctl_run+0x152f/0x1830 arch/x86/kvm/x86.c:11098 Modules linked in: CPU: 0 PID: 1977 Comm: syz-executor Not tainted 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:kvm_arch_vcpu_ioctl_run+0x152f/0x1830 arch/x86/kvm/x86.c:11098 Code: fd ff ff e8 83 ca 67 00 44 89 ee 48 c7 c7 80 8e 42 89 c6 05 e3 40 1e 0c 01 e8 2d 22 33 00 0f 0b e9 ed fc ff ff e8 61 ca 67 00 <0f> 0b e9 ff fb ff ff e8 55 ca 67 00 80 3d c0 40 1e 0c 00 0f 85 19 RSP: 0018:ffffc900072dfcd8 EFLAGS: 00010212 RAX: 00000000000006a9 RBX: ffff88801852c000 RCX: ffffc90002bd9000 RDX: 0000000000040000 RSI: ffffffff81114ddf RDI: ffff88810e5d0880 RBP: ffff888018995180 R08: 0000000000000000 R09: fffffbfff1f4f5b0 R10: ffffffff8fa7ad87 R11: 0000000000000001 R12: ffff8880189951ac R13: 0000000000000000 R14: ffff8880189959a8 R15: ffff888018995268 FS: 00007feb64c14640(0000) GS:ffff888063e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000000002a8 CR3: 0000000114888000 CR4: 0000000000752ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: <TASK> 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:00007feb64c14068 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000059c0a0 RCX: 000000000047959d RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000008 RBP: 000000000059c0a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000059c0ac R13: 000000000000000b R14: 0000000000437250 R15: 00007feb64bf4000 </TASK> Modules linked in: CPU: 0 PID: 1977 Comm: syz-executor Not tainted 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:kvm_arch_vcpu_ioctl_run+0x152f/0x1830 arch/x86/kvm/x86.c:11098 Code: fd ff ff e8 83 ca 67 00 44 89 ee 48 c7 c7 80 8e 42 89 c6 05 e3 40 1e 0c 01 e8 2d 22 33 00 0f 0b e9 ed fc ff ff e8 61 ca 67 00 <0f> 0b e9 ff fb ff ff e8 55 ca 67 00 80 3d c0 40 1e 0c 00 0f 85 19 RSP: 0018:ffffc900072dfcd8 EFLAGS: 00010212 RAX: 00000000000006a9 RBX: ffff88801852c000 RCX: ffffc90002bd9000 RDX: 0000000000040000 RSI: ffffffff81114ddf RDI: ffff88810e5d0880 RBP: ffff888018995180 R08: 0000000000000000 R09: fffffbfff1f4f5b0 R10: ffffffff8fa7ad87 R11: 0000000000000001 R12: ffff8880189951ac R13: 0000000000000000 R14: ffff8880189959a8 R15: ffff888018995268 FS: 00007feb64c14640(0000) GS:ffff888063e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000000002a8 CR3: 0000000114888000 CR4: 0000000000752ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: <TASK> 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:00007feb64c14068 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000059c0a0 RCX: 000000000047959d RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000008 RBP: 000000000059c0a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000059c0ac R13: 000000000000000b R14: 0000000000437250 R15: 00007feb64bf4000 </TASK> Kernel panic - not syncing: kernel: panic_on_warn set ... CPU: 0 PID: 1977 Comm: syz-executor Not tainted 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:kvm_arch_vcpu_ioctl_run+0x152f/0x1830 arch/x86/kvm/x86.c:11098 Code: fd ff ff e8 83 ca 67 00 44 89 ee 48 c7 c7 80 8e 42 89 c6 05 e3 40 1e 0c 01 e8 2d 22 33 00 0f 0b e9 ed fc ff ff e8 61 ca 67 00 <0f> 0b e9 ff fb ff ff e8 55 ca 67 00 80 3d c0 40 1e 0c 00 0f 85 19 RSP: 0018:ffffc900072dfcd8 EFLAGS: 00010212 RAX: 00000000000006a9 RBX: ffff88801852c000 RCX: ffffc90002bd9000 RDX: 0000000000040000 RSI: ffffffff81114ddf RDI: ffff88810e5d0880 RBP: ffff888018995180 R08: 0000000000000000 R09: fffffbfff1f4f5b0 R10: ffffffff8fa7ad87 R11: 0000000000000001 R12: ffff8880189951ac R13: 0000000000000000 R14: ffff8880189959a8 R15: ffff888018995268 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:00007feb64c14068 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000059c0a0 RCX: 000000000047959d RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000008 RBP: 000000000059c0a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000059c0ac R13: 000000000000000b R14: 0000000000437250 R15: 00007feb64bf4000 </TASK> Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 1 seconds..
