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AJvYcCUyOo19U1aXQzIOS86P/Nu1HGsn3rTijtd1SbladrMPM+IrUTRxmHl838pTZYAiEOeP/QK1eMzYnqE+tJjajpEBPQM=@vger.kernel.org X-Gm-Message-State: AOJu0YzxYWfGzJWt2E1U65LdFPpFippCeePeoCkY9sK2x91LnP130pGY dZe9tZCSmQmXC8uWzMLHP5pYJKXdqQyI5K3uESoEqE+mr2NzRqZs5p5BNQa4Vl0JUWeblv0rPkZ FrwN4jaG5Qpnb2M6phZBrN3CbMpm7F07qgLetgoGan7pIVnETiCyXQbPGqPg= Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:4b18:b0:66f:2d14:32b7 with SMTP id 006d021491bc7-679c4646639mr9493668eaf.9.1772087642057; Wed, 25 Feb 2026 22:34:02 -0800 (PST) Date: Wed, 25 Feb 2026 22:34:02 -0800 In-Reply-To: <20260226061625.30751-1-wangqing7171@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <699fe95a.050a0220.2fcbed.0004.GAE@google.com> Subject: Re: [syzbot] [trace?] WARNING in tracing_buffers_mmap_close (3) 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, wangqing7171@gmail.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: WARNING in tracing_buffers_mmap_close ------------[ cut here ]------------ ring_buffer_unmap(iter->array_buffer->buffer, iter->cpu_file) WARNING: kernel/trace/trace.c:8221 at tracing_buffers_mmap_close kernel/trace/trace.c:8221 [inline], CPU#0: syz.0.17/6401 WARNING: kernel/trace/trace.c:8221 at tracing_buffers_mmap_close+0xea/0x140 kernel/trace/trace.c:8216, CPU#0: syz.0.17/6401 Modules linked in: CPU: 0 UID: 0 PID: 6401 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:tracing_buffers_mmap_close kernel/trace/trace.c:8221 [inline] RIP: 0010:tracing_buffers_mmap_close+0xea/0x140 kernel/trace/trace.c:8216 Code: 08 e8 1a 74 ff ff 31 ff 89 c3 89 c6 e8 0f 50 fb ff 85 db 75 0f e8 56 55 fb ff 48 83 c4 08 5b c3 cc cc cc cc e8 47 55 fb ff 90 <0f> 0b 90 e8 3e 55 fb ff 48 83 c4 08 5b e9 54 55 83 09 e8 ff bd 66 RSP: 0018:ffffc90002f27ab8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 00000000ffffffed RCX: ffffffff820ca621 RDX: ffff88801efcdac0 RSI: ffffffff820ca639 RDI: ffff88801efcdac0 RBP: ffffffff820ca550 R08: 0000000000000005 R09: 0000000000000000 R10: 00000000ffffffed R11: 0000000000000000 R12: ffff888078da3048 R13: 0000000000000001 R14: 0000000000000005 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff88812434f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4d99a17dac CR3: 000000000e598000 CR4: 00000000003526f0 Call Trace: vma_close mm/internal.h:190 [inline] remove_vma+0x88/0x160 mm/vma.c:466 tear_down_vmas+0x2a5/0x600 mm/mmap.c:1264 exit_mmap+0x469/0xa30 mm/mmap.c:1322 __mmput+0x12a/0x410 kernel/fork.c:1174 mmput+0x67/0x80 kernel/fork.c:1197 exit_mm kernel/exit.c:581 [inline] do_exit+0x78a/0x2aa0 kernel/exit.c:959 do_group_exit+0xd5/0x2a0 kernel/exit.c:1112 __do_sys_exit_group kernel/exit.c:1123 [inline] __se_sys_exit_group kernel/exit.c:1121 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1121 x64_sys_call+0x102c/0x1530 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4d9979c629 Code: Unable to access opcode bytes at 0x7f4d9979c5ff. RSP: 002b:00007ffea34a0a28 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4d9979c629 RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000003 R08: 0000000000000000 R09: 00007f4d999e53e0 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4d999e53e0 R14: 0000000000000003 R15: 00007ffea34a0ae0 Tested on: commit: f4d0ec0a Merge tag 'erofs-for-7.0-rc2-fixes' of git://.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12efb55a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=af6ed0125ed44356 dashboard link: https://syzkaller.appspot.com/bug?extid=3b5dd2030fe08afdf65d compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 patch: https://syzkaller.appspot.com/x/patch.diff?x=1484c24a580000