From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6E6FFC27C6E for ; Sun, 16 Jun 2024 05:54:24 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 7F0376B0116; Sun, 16 Jun 2024 01:54:23 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 79ED36B0117; Sun, 16 Jun 2024 01:54:23 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 666BA6B0118; Sun, 16 Jun 2024 01:54:23 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id 44A946B0116 for ; Sun, 16 Jun 2024 01:54:23 -0400 (EDT) Received: from smtpin06.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay04.hostedemail.com (Postfix) with ESMTP id 9AE1B1A0EF2 for ; Sun, 16 Jun 2024 05:54:22 +0000 (UTC) X-FDA: 82235686764.06.A6FCC9B Received: from mail-il1-f207.google.com (mail-il1-f207.google.com [209.85.166.207]) by imf29.hostedemail.com (Postfix) with ESMTP id D9E5912000F for ; Sun, 16 Jun 2024 05:54:20 +0000 (UTC) Authentication-Results: imf29.hostedemail.com; dkim=none; spf=pass (imf29.hostedemail.com: domain of 3C35uZgkbAPou01mcnngtcrrkf.iqqingwugteqpvgpv.eqo@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com designates 209.85.166.207 as permitted sender) smtp.mailfrom=3C35uZgkbAPou01mcnngtcrrkf.iqqingwugteqpvgpv.eqo@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=appspotmail.com (policy=none) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1718517259; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references; bh=romJDKF4YYdUcNlHKmmiJoWHinqaoX9oJ6SM72wKzyk=; b=Pmdizgn6qLKUGJbLOKngbZ1BY3kIjEOF7Jd/bh3079Oya4slj5B0eQohJW7EEbrGDhP6n5 xqhVYFssEpEGymt5Xz9DynnHssL9Bn2vKJ9N0YBtolZJtSOQ0sVcO1ArKawWcNR4JvW+KI YhbEPrF8EHxmani25JlPSZojTXvNmVo= ARC-Authentication-Results: i=1; imf29.hostedemail.com; dkim=none; spf=pass (imf29.hostedemail.com: domain of 3C35uZgkbAPou01mcnngtcrrkf.iqqingwugteqpvgpv.eqo@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com designates 209.85.166.207 as permitted sender) smtp.mailfrom=3C35uZgkbAPou01mcnngtcrrkf.iqqingwugteqpvgpv.eqo@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=appspotmail.com (policy=none) ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1718517259; a=rsa-sha256; cv=none; b=X2a9UPC2yR92EP/wdJlG69WaWXMRE02wQN466NUQ5lLQZewP3eFCOiI4NoiX1CElwjYkMo iUXE82J5AHt48IsLSdNnQl6DLJgoy1UbKcdiBxNzA1WhDYoNH3ceGEiUel2SSSGNYKCuOX L5QjoWnnLSBcs0AXroG6dax6N0q6q1M= Received: by mail-il1-f207.google.com with SMTP id e9e14a558f8ab-37586a82295so35747355ab.3 for ; Sat, 15 Jun 2024 22:54:20 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718517260; x=1719122060; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=romJDKF4YYdUcNlHKmmiJoWHinqaoX9oJ6SM72wKzyk=; b=D31l70mrhtdJN7f+WxzsBy9DvzSMB60du6k65pN/flTw6P0YP4tMCg2fQqWeMExOHE gLa39VwVsrrS/6xPPjQdirLZoZxGMRhYFVsNnOk97bSBW1hfvcYiJqJkoeebraL9biX2 Y2f7JFdlcMVIigi/8jxVI+qBEWao4phOwfhQcW6Sb3fYDd/d/b58YG6M4VqBdmS2rCy3 R7JleBV35TB3bbgHxkP1bkkuDufTD/e84mKhf5jnK7rI79oiqxq5EE91dOMir1xtQfbX 0fThw60ZH9Uk9GdclcM82xKWZiPr0TEeK/+YBjwXpP7du+fK1pVDKePC9DFHKG/jYdWh I6KQ== X-Forwarded-Encrypted: i=1; AJvYcCXwiz7nuiragNC3/Ke4+E0SWCnN/EDHeUaPXFL2Mc5doVBBC729nV1lWNuUSEtT1TV4sxR9EUo6zAJTVmQev4c8CMU= X-Gm-Message-State: AOJu0YyaT7UrWNqBYp1z/qLeJrnk7L/t1C6v57dg1RD0SIWvQyEzgIY9 7h+FC9OsH5WEwFahclbHWtAFgJcFz6zDAq8hpAHIE7D1adgk67t93cUmA2nALkKx5hkUJC7ZQDJ 6Q4+31OC5qQg4VsymerXmlAsa60XDJpPTjvcYeLXVbO2epiD+tkTz/Z0= X-Google-Smtp-Source: AGHT+IE2Gd+LOe88pC+S0lKc6d8yttgEK0N/YWyestZ/pdZSMy4wAkxPXqJ47g9Prl9B8V7DJLFuWv6LzPsnTqBeF0wTRpUHU0aJ MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1c29:b0:375:9deb:ceb8 with SMTP id e9e14a558f8ab-375e1014718mr3864085ab.3.1718517259888; Sat, 15 Jun 2024 22:54:19 -0700 (PDT) Date: Sat, 15 Jun 2024 22:54:19 -0700 In-Reply-To: <00000000000041df050616f6ba4e@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d0fffc061afb7a2c@google.com> Subject: Re: [syzbot] [mm?] possible deadlock in __mmap_lock_do_trace_start_locking From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam03 X-Rspam-User: X-Rspamd-Queue-Id: D9E5912000F X-Stat-Signature: kkxy6ed9cdibzidgyebzy4b6baz614nk X-HE-Tag: 1718517260-332322 X-HE-Meta: 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 KSb9uH9h BIivJXS5nECuwIsFoAUu+1tlvBNKwMBRorF89He3tnbFNVwUPRxZMyvqoRiIN15el8rkeAnsc2D/mfsDQ1GEi/jki7G+kdg/oOpTu7Vo2tHh5acUHYDjxytFcigoeds1DlWmz44/WZcZTJgXNwahPFl/B2YrY1VVyLszWaNuw8rEKDPBZZVxcLn/eQPK8oVHsuCKMGhZODvbjUXDj9MKIHLoCfMYxkPoimJNUFq9L6YqXN8KUSavRiDMzy8qL8SFIPlyIa9UPRPWaWXgxbO7U7pOMzOXwYb3F/YoYZ5MXSstMOlfcmSW9tnLYKxnt+gCujhNW9qH8XDT/QkygOnuHDgiekLYD+JB5CY02sCX2NMa/BXwuzGKWFksBMIxQokwn/io3qAiLtVfORG4wjZ8szpc4vZPMIHdPewiRkBDcxQjGiUpFqIJgG6JfJIbGBsQjOOKbPk26DYehF8nfJX0bBX5AKtWQABWqbWXR9VlpV06dfmgMV0rZJOJ/64kd2EBTK6uAc+w55++q55XhBFeP4SHgDsLsddUklG6tcccG7sKu3oJntAHhz7gghHhcoo5J+liZygbLTS+ubTxGLQlJiHT8RFhqGVqvKDsztLvhGQfFApkjfNkeQlyKeX/Jk0++a4OTmH3/MQrKHJWLrgIRjzEVPvWd2tvoJbhAVEvUSJAhOOokM4KkvNPlXwCMCyIhI+n68Nw6sk1eoSnhY2+77mNQDjakZONhlN4Vo0A4o5EVsI67HcQlLBPv8ndd42xJVZazkwO3odSRBvNoaS/IseWR6ZsxWJ28yrqDqLIm4WduvumnQHET1BXjSmW8CMSTic4o554muGu7F5JJdUtGZPkGtCcwRMgV0EWQUVadUzKn3dgT9Li9DxqC1R9jBHadUUF3S+3eDko+NVBv/8Mc36AxgNtAdKsS2qKNV1vXbSJcuM9obpf3O1sxF1OGyZK1NHZQQoLsw/5+KSY+E3+W1WcnC6bJ L7gYTf69 gbWUUKZVTJ5cqHN+07dNJP975w1mqHPddlQMxIyeeTVEg3jpq1PWIlAJv4A6SjjkclO8fmwcy+0Y51EsWduC57DO7/Lvfm7OuZkdBjsCy6BFRxYk0TIldF40SP6qQivQmLTCZWmN+Fkqp0eN0KWU2w== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: syzbot has found a reproducer for the following issue on: HEAD commit: 36534d3c5453 tcp: use signed arithmetic in tcp_rtx_probe0_.. git tree: bpf console output: https://syzkaller.appspot.com/x/log.txt?x=110e9dde980000 kernel config: https://syzkaller.appspot.com/x/.config?x=333ebe38d43c42e2 dashboard link: https://syzkaller.appspot.com/bug?extid=6ff90931779bcdfc840c compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1585acfa980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17bdb7ee980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/4e648f638b5f/disk-36534d3c.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/bbe0d41240f1/vmlinux-36534d3c.xz kernel image: https://storage.googleapis.com/syzbot-assets/17eb17ecd214/bzImage-36534d3c.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+6ff90931779bcdfc840c@syzkaller.appspotmail.com ============================================ WARNING: possible recursive locking detected 6.10.0-rc2-syzkaller-00242-g36534d3c5453 #0 Not tainted -------------------------------------------- syz-executor181/5090 is trying to acquire lock: ffff8880b9538828 (lock#9){+.+.}-{2:2}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline] ffff8880b9538828 (lock#9){+.+.}-{2:2}, at: __mmap_lock_do_trace_start_locking+0x83/0x620 mm/mmap_lock.c:230 but task is already holding lock: ffff8880b9538828 (lock#9){+.+.}-{2:2}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline] ffff8880b9538828 (lock#9){+.+.}-{2:2}, at: __mmap_lock_do_trace_start_locking+0x83/0x620 mm/mmap_lock.c:230 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(lock#9); lock(lock#9); *** DEADLOCK *** May be due to missing lock nesting notation 3 locks held by syz-executor181/5090: #0: ffff8880b9538828 (lock#9){+.+.}-{2:2}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline] #0: ffff8880b9538828 (lock#9){+.+.}-{2:2}, at: __mmap_lock_do_trace_start_locking+0x83/0x620 mm/mmap_lock.c:230 #1: ffffffff8e333fa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #1: ffffffff8e333fa0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #1: ffffffff8e333fa0 (rcu_read_lock){....}-{1:2}, at: get_mem_cgroup_from_mm+0x38/0x2a0 mm/memcontrol.c:1265 #2: ffffffff8e333fa0 (rcu_read_lock){....}-{1:2}, at: trace_call_bpf+0xbc/0x8a0 stack backtrace: CPU: 1 PID: 5090 Comm: syz-executor181 Not tainted 6.10.0-rc2-syzkaller-00242-g36534d3c5453 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 check_deadlock kernel/locking/lockdep.c:3062 [inline] validate_chain+0x15d3/0x5900 kernel/locking/lockdep.c:3856 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 local_lock_acquire include/linux/local_lock_internal.h:29 [inline] __mmap_lock_do_trace_start_locking+0x9c/0x620 mm/mmap_lock.c:230 __mmap_lock_trace_start_locking include/linux/mmap_lock.h:29 [inline] mmap_read_trylock include/linux/mmap_lock.h:162 [inline] stack_map_get_build_id_offset+0x98a/0x9d0 kernel/bpf/stackmap.c:141 __bpf_get_stack+0x4ad/0x5a0 kernel/bpf/stackmap.c:449 bpf_prog_e6cf5f9c69743609+0x42/0x46 bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline] __bpf_prog_run include/linux/filter.h:691 [inline] bpf_prog_run include/linux/filter.h:698 [inline] bpf_prog_run_array include/linux/bpf.h:2103 [inline] trace_call_bpf+0x369/0x8a0 kernel/trace/bpf_trace.c:147 perf_trace_run_bpf_submit+0x7c/0x1d0 kernel/events/core.c:10269 perf_trace_lock+0x388/0x490 include/trace/events/lock.h:50 trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x986/0x9f0 kernel/locking/lockdep.c:5765 rcu_lock_release include/linux/rcupdate.h:339 [inline] rcu_read_unlock include/linux/rcupdate.h:812 [inline] get_mem_cgroup_from_mm+0x1ad/0x2a0 mm/memcontrol.c:1271 get_mm_memcg_path+0x1b/0x600 mm/mmap_lock.c:202 __mmap_lock_do_trace_start_locking+0x134/0x620 mm/mmap_lock.c:230 __mmap_lock_trace_start_locking include/linux/mmap_lock.h:29 [inline] mmap_read_lock include/linux/mmap_lock.h:143 [inline] acct_collect+0x7e7/0x830 kernel/acct.c:563 do_exit+0x936/0x27e0 kernel/exit.c:853 do_group_exit+0x207/0x2c0 kernel/exit.c:1023 __do_sys_exit_group kernel/exit.c:1034 [inline] __se_sys_exit_group kernel/exit.c:1032 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1032 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9c47742279 Code: 90 49 c7 c0 b8 ff ff ff be e7 00 00 00 ba 3c 00 00 00 eb 12 0f 1f 44 00 00 89 d0 0f 05 48 3d 00 f0 ff ff 77 1c f4 89 f0 0f 05 <48> 3d 00 f0 ff ff 76 e7 f7 d8 64 41 89 00 eb df 0f 1f 80 00 00 00 RSP: 002b:00007ffd321ae558 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9c47742279 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 RBP: 00007f9c477bd2b0 R08: ffffffffffffffb8 R09: 00000000000000a0 R10: 00000000000000a0 R11: 0000000000000246 R12: 00007f9c477bd2b0 R13: 0000000000000000 R14: 00007f9c477bdd20 R15: 00007f9c47713400 --- 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.