Hello, syzbot found the following issue on: HEAD commit: 45a3e24f65e9 Linux 6.4-rc7 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=160cc82f280000 kernel config: https://syzkaller.appspot.com/x/.config?x=2cbd298d0aff1140 dashboard link: https://syzkaller.appspot.com/bug?extid=de6565462ab540f50e47 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=160aacb7280000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17c115d3280000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/c09bcd4ec365/disk-45a3e24f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/03549b639718/vmlinux-45a3e24f.xz kernel image: https://storage.googleapis.com/syzbot-assets/91f203e5f63e/bzImage-45a3e24f.xz The issue was bisected to: commit 565b4824c39fa335cba2028a09d7beb7112f3c9a Author: Jiri Pirko <jiri@xxxxxxxxxx> Date: Mon Feb 6 09:41:51 2023 +0000 devlink: change port event netdev notifier from per-net to global bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=110a1a5b280000 final oops: https://syzkaller.appspot.com/x/report.txt?x=130a1a5b280000 console output: https://syzkaller.appspot.com/x/log.txt?x=150a1a5b280000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+de6565462ab540f50e47@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 565b4824c39f ("devlink: change port event netdev notifier from per-net to global") ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5025 at net/ipv4/af_inet.c:154 inet_sock_destruct+0x6df/0x8a0 net/ipv4/af_inet.c:154 Modules linked in: CPU: 0 PID: 5025 Comm: syz-executor250 Not tainted 6.4.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 RIP: 0010:inet_sock_destruct+0x6df/0x8a0 net/ipv4/af_inet.c:154 Code: ff e8 c5 9f e0 f8 0f 0b e9 07 fe ff ff e8 b9 9f e0 f8 0f 0b e9 3f fe ff ff e8 ad 9f e0 f8 0f 0b e9 95 fd ff ff e8 a1 9f e0 f8 <0f> 0b e9 9f fe ff ff e8 d5 6a 33 f9 e9 7a fc ff ff 4c 89 e7 e8 08 RSP: 0018:ffffc90000007de8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 00000000fffff000 RCX: 0000000000000100 RDX: ffff8880792f8000 RSI: ffffffff88a3a73f RDI: 0000000000000005 RBP: ffff88814aa99980 R08: 0000000000000005 R09: 0000000000000000 R10: 00000000fffff000 R11: 0000000000094001 R12: ffff88814aa999a8 R13: ffff88814aa99bf4 R14: ffffc90000007ed8 R15: 0000000000000004 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f579b4f6ec8 CR3: 000000000c571000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> __sk_destruct+0x4d/0x770 net/core/sock.c:2130 rcu_do_batch kernel/rcu/tree.c:2115 [inline] rcu_core+0x806/0x1ad0 kernel/rcu/tree.c:2377 __do_softirq+0x1d4/0x905 kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x114/0x190 kernel/softirq.c:650 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1106 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:write_comp_data+0x3c/0x90 kernel/kcov.c:236 Code: 01 00 00 49 89 f8 65 48 8b 14 25 c0 bb 03 00 a9 00 01 ff 00 74 0e 85 f6 74 59 8b 82 0c 16 00 00 85 c0 74 4f 8b 82 e8 15 00 00 <83> f8 03 75 44 48 8b 82 f0 15 00 00 8b 92 ec 15 00 00 48 8b 38 48 RSP: 0018:ffffc90003a7fbf8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffc90003a7b020 RCX: ffffffff814d76d1 RDX: ffff8880792f8000 RSI: 0000000000000000 RDI: 0000000000000007 RBP: ffff8880792f8000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000094001 R12: 0000000000000000 R13: ffffc90003a78000 R14: dffffc0000000000 R15: ffff8880792f85f8 stack_not_used include/linux/sched/task_stack.h:107 [inline] check_stack_usage kernel/exit.c:776 [inline] do_exit+0x17f1/0x29b0 kernel/exit.c:918 do_group_exit+0xd4/0x2a0 kernel/exit.c:1024 get_signal+0x2318/0x25b0 kernel/signal.c:2876 arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f579b4a1d39 Code: Unable to access opcode bytes at 0x7f579b4a1d0f. RSP: 002b:00007f579b431308 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f579b52a4d8 RCX: 00007f579b4a1d39 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f579b52a4d8 RBP: 00007f579b52a4d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f579b4f72c0 R13: 00007f579b52a4dc R14: 00007f579b431400 R15: 0000000000022000 </TASK> ---------------- Code disassembly (best guess): 0: 01 00 add %eax,(%rax) 2: 00 49 89 add %cl,-0x77(%rcx) 5: f8 clc 6: 65 48 8b 14 25 c0 bb mov %gs:0x3bbc0,%rdx d: 03 00 f: a9 00 01 ff 00 test $0xff0100,%eax 14: 74 0e je 0x24 16: 85 f6 test %esi,%esi 18: 74 59 je 0x73 1a: 8b 82 0c 16 00 00 mov 0x160c(%rdx),%eax 20: 85 c0 test %eax,%eax 22: 74 4f je 0x73 24: 8b 82 e8 15 00 00 mov 0x15e8(%rdx),%eax * 2a: 83 f8 03 cmp $0x3,%eax <-- trapping instruction 2d: 75 44 jne 0x73 2f: 48 8b 82 f0 15 00 00 mov 0x15f0(%rdx),%rax 36: 8b 92 ec 15 00 00 mov 0x15ec(%rdx),%edx 3c: 48 8b 38 mov (%rax),%rdi 3f: 48 rex.W --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
