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Tue, 11 Nov 2025 09:05:31 -0800 (PST) Date: Tue, 11 Nov 2025 09:05:31 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69136cdb.a70a0220.22f260.0142.GAE@google.com> Subject: [syzbot] [trace?] WARNING in tracing_buffers_mmap_close (2) From: syzbot To: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, mathieu.desnoyers@efficios.com, mhiramat@kernel.org, rostedt@goodmis.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 4a0c9b339199 Merge tag 'probes-fixes-v6.18-rc4' of git://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=127c3bcd980000 kernel config: https://syzkaller.appspot.com/x/.config?x=19d831c6d0386a9c dashboard link: https://syzkaller.appspot.com/bug?extid=a72c325b042aae6403c7 compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13fb5342580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=167c3bcd980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/0885fd14dc45/disk-4a0c9b33.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/d090edb8df65/vmlinux-4a0c9b33.xz kernel image: https://storage.googleapis.com/syzbot-assets/fe620e34d128/bzImage-4a0c9b33.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a72c325b042aae6403c7@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5989 at kernel/trace/trace.c:8780 tracing_buffers_mmap_close kernel/trace/trace.c:8780 [inline] WARNING: CPU: 0 PID: 5989 at kernel/trace/trace.c:8780 tracing_buffers_mmap_close+0xdd/0x130 kernel/trace/trace.c:8775 Modules linked in: CPU: 0 UID: 0 PID: 5989 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:tracing_buffers_mmap_close kernel/trace/trace.c:8780 [inline] RIP: 0010:tracing_buffers_mmap_close+0xdd/0x130 kernel/trace/trace.c:8775 Code: 75 46 48 8b 7b 08 e8 b2 94 ff ff 31 ff 89 c3 89 c6 e8 07 4b fb ff 85 db 75 0a 48 83 c4 08 5b e9 b9 4f fb ff e8 b4 4f fb ff 90 <0f> 0b 90 48 83 c4 08 5b e9 a6 4f fb ff e8 b1 e6 62 00 eb 87 e8 da RSP: 0018:ffffc90003047ba8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 00000000ffffffed RCX: ffffffff81c11d89 RDX: ffff888020713c80 RSI: ffffffff81c11d9c RDI: 0000000000000005 RBP: ffffffff81c11cc0 R08: 0000000000000005 R09: 0000000000000000 R10: 00000000ffffffed R11: 0000000000000000 R12: ffff8880217512c8 R13: dffffc0000000000 R14: ffffc90003047c30 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888124a0d000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555606ff808 CR3: 000000000e182000 CR4: 00000000003526f0 Call Trace: vma_close mm/internal.h:190 [inline] remove_vma+0x88/0x160 mm/vma.c:464 exit_mmap+0x50a/0xb90 mm/mmap.c:1305 __mmput+0x12a/0x410 kernel/fork.c:1133 mmput+0x62/0x70 kernel/fork.c:1156 exit_mm kernel/exit.c:582 [inline] do_exit+0x7c7/0x2bf0 kernel/exit.c:954 do_group_exit+0xd3/0x2a0 kernel/exit.c:1107 __do_sys_exit_group kernel/exit.c:1118 [inline] __se_sys_exit_group kernel/exit.c:1116 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1116 x64_sys_call+0x150b/0x1730 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f168a18f6c9 Code: Unable to access opcode bytes at 0x7f168a18f69f. RSP: 002b:00007ffff8c604f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f168a18f6c9 RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000003 R08: 00000004f8c605ef R09: 00007f168a3b1280 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f168a3b1280 R14: 0000000000000003 R15: 00007ffff8c605b0 --- 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 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 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