Hello, When using Healer to fuzz the latest Linux kernel, the following crash was triggered. HEAD commit: 27151f177827 Merge tag 'perf-tools-for-v5.15-2021-09-04' git tree: upstream console output: https://drive.google.com/file/d/1M5oyA_IcWSDB2XpnoX8SDmKJA3JhKltz/view?usp=sharing kernel config: https://drive.google.com/file/d/1ZMVJ2vNe0EiIEeWNVyrGb7hBdOG5Uj3e/view?usp=sharing C reproducer: https://drive.google.com/file/d/1AtDNXl8XEBfglKXsKsAH2NuXBcrp8Zp9/view?usp=sharing Syzlang reproducer: https://drive.google.com/file/d/1R_XD_cyMNS0Q_SGSqomRy_LIClOrd-gI/view?usp=sharing If you fix this issue, please add the following tag to the commit: Reported-by: Hao Sun <sunhao.th@xxxxxxxxx> ODEBUG: object ffffc9000073cda0 is NOT on stack ffffc90005f34000, but annotated. ------------[ cut here ]------------ WARNING: CPU: 2 PID: 27648 at lib/debugobjects.c:548 debug_object_is_on_stack lib/debugobjects.c:545 [inline] WARNING: CPU: 2 PID: 27648 at lib/debugobjects.c:548 __debug_object_init+0x224/0x520 lib/debugobjects.c:607 Modules linked in: CPU: 2 PID: 27648 Comm: syz-executor Not tainted 5.14.0+ #13 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 RIP: 0010:debug_object_is_on_stack lib/debugobjects.c:545 [inline] RIP: 0010:__debug_object_init+0x224/0x520 lib/debugobjects.c:607 Code: 84 ca fe ff ff 83 c0 01 4c 89 f6 48 c7 c7 f8 b0 3c 85 89 05 7e c2 56 06 65 48 8b 04 25 40 70 01 00 48 8b 50 20 e8 05 9b f5 01 <0f> 0b e9 9e fe ff ff 89 05 87 4d e3 03 e9 c4 fe ff ff 48 c7 c7 e0 RSP: 0018:ffffc9000073ccf0 EFLAGS: 00010282 RAX: 0000000000000050 RBX: ffff88810cf2f398 RCX: 0000000000000100 RDX: 0000000000000000 RSI: ffffffff812cf85c RDI: 00000000ffffffff RBP: ffffffff88868538 R08: 0000000000000000 R09: 0000000000000001 R10: ffffc9000073cc80 R11: 0000000000000005 R12: 0000000000000203 R13: 0000000000054450 R14: ffffc9000073cda0 R15: ffff88807dd264f0 FS: 0000000002ad0940(0000) GS:ffff88807dd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000005061ec CR3: 0000000100da5000 CR4: 0000000000750ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: <IRQ> __init_work+0x3f/0x50 kernel/workqueue.c:519 synchronize_rcu_expedited+0x26a/0x460 kernel/rcu/tree_exp.h:847 bdi_remove_from_list mm/backing-dev.c:938 [inline] bdi_unregister+0x97/0x270 mm/backing-dev.c:946 release_bdi+0x4a/0x70 mm/backing-dev.c:968 kref_put include/linux/kref.h:65 [inline] bdi_put+0x47/0x70 mm/backing-dev.c:976 bdev_free_inode+0x59/0xc0 fs/block_dev.c:819 i_callback+0x24/0x50 fs/inode.c:224 rcu_do_batch kernel/rcu/tree.c:2508 [inline] rcu_core+0x2d6/0x9f0 kernel/rcu/tree.c:2743 __do_softirq+0xe9/0x561 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu kernel/softirq.c:636 [inline] irq_exit_rcu+0xe2/0x100 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x9e/0xc0 arch/x86/kernel/apic/apic.c:1097 </IRQ> asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x60 kernel/kcov.c:197 Code: 65 48 8b 14 25 40 70 01 00 81 e1 00 01 00 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82 34 15 00 00 85 c0 74 2b 8b 82 10 15 00 00 <83> f8 02 75 20 48 8b 8a 18 15 00 00 8b 92 14 15 00 00 48 8b 01 48 RSP: 0018:ffffc90005f37b78 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000006 RCX: 0000000000000000 RDX: ffff888109448000 RSI: ffffffff8212a28c RDI: ffffc90005f37d30 RBP: 0000000000000006 R08: 0000000000000d40 R09: ffff8880165fc5e0 R10: ffffc90005f37cd0 R11: 0000000000000003 R12: 0000000000000375 R13: ffff888107597b40 R14: ffffc90005f37d30 R15: ffff8880174b0ea0 tomoyo_domain_quota_is_ok+0xac/0x150 security/tomoyo/util.c:1092 tomoyo_supervisor+0x228/0x7f0 security/tomoyo/common.c:2089 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline] tomoyo_path_permission+0xa0/0xf0 security/tomoyo/file.c:587 tomoyo_path_perm+0x22f/0x2d0 security/tomoyo/file.c:838 tomoyo_path_symlink+0x43/0x70 security/tomoyo/tomoyo.c:199 security_path_symlink+0x48/0x80 security/security.c:1164 do_symlinkat+0x75/0x120 fs/namei.c:4274 __do_sys_symlink fs/namei.c:4301 [inline] __se_sys_symlink fs/namei.c:4299 [inline] __x64_sys_symlink+0x3a/0x40 fs/namei.c:4299 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x34/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x46a597 Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 58 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd09085778 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000046a597 RDX: 0000000000000000 RSI: 00000000004e40f9 RDI: 00007ffd09085810 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000014 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ffd09085810 R15: 00007ffd090857cc ---------------- Code disassembly (best guess): 0: 65 48 8b 14 25 40 70 mov %gs:0x17040,%rdx 7: 01 00 9: 81 e1 00 01 00 00 and $0x100,%ecx f: a9 00 01 ff 00 test $0xff0100,%eax 14: 74 0e je 0x24 16: 85 c9 test %ecx,%ecx 18: 74 35 je 0x4f 1a: 8b 82 34 15 00 00 mov 0x1534(%rdx),%eax 20: 85 c0 test %eax,%eax 22: 74 2b je 0x4f 24: 8b 82 10 15 00 00 mov 0x1510(%rdx),%eax * 2a: 83 f8 02 cmp $0x2,%eax <-- trapping instruction 2d: 75 20 jne 0x4f 2f: 48 8b 8a 18 15 00 00 mov 0x1518(%rdx),%rcx 36: 8b 92 14 15 00 00 mov 0x1514(%rdx),%edx 3c: 48 8b 01 mov (%rcx),%rax 3f: 48 rex.W%
