From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f197.google.com (mail-il1-f197.google.com [209.85.166.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 01A1C204F73 for ; Tue, 15 Apr 2025 18:33:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744741985; cv=none; b=U2GkeDdUXWO2+mPj10F7H11ixSi0H1qXbpmDRgtOqMJ3a/HE0RFCMkv/YHissMPGfKw+wFXNZt5XYMlzyLzGsuZayrD5h+LWX+7TJrOBqV2+FSvE2ilRMB8Q8GUkrm6CDZ3p1fITjmYt82TtbZtvj84jhGK+pb86ZbMtj1SJhaw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744741985; c=relaxed/simple; bh=sJKqOZodm7+a2lM+O2RSlzzN0adYDmaFn1/I0OxDU5U=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=or27zOHXyDJXsAvapZszXF2cLuCEIRWnR0D3wkxZPCRFeCVumr5KNVfMG32D4sX7UJFQxnTWJpU1NirvQFTVsiJelGYURFNHIYDSfsFV5YwasnSHjUFSg4AxAqP7vqne8xLmRtqigJil1v5VWYxgy3t6E8EsaDDfsPcdtpgcJOo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.197 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f197.google.com with SMTP id e9e14a558f8ab-3d6e10f4b85so103165765ab.0 for ; Tue, 15 Apr 2025 11:33:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1744741983; x=1745346783; 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=cTdQ3NucjGthMoMdRub+X09VGUAGu9XvIeRBUmp51A4=; b=Q2lCxZkmS8TzdMAmzHPthNaCC5RYDnFLKs7kmToQqVMYTyZbzDX4THEsy9Db4rqw0Z TzIqTJQz5FJuLR46wKMFb6A22jDTrTMfA7QcL/X2qLHpAvyfvfJ1UqxOT7Wu6AiyljbH XnsKeHZL19i+bZKABygCKYIH7ZgpocyeaiwiycJuTX2AJuIrGEKW1+WnidtNkhKRerHM lYPe308345sZ52BIQ5F9IqtQwc/zp/aZyrI49uI0nDyKuk526vpWZ5grWqSnvkGsP0o+ k0e4c+bEq+3b/zWGPq/kLn158d1jpyjl1wP3DARnKc0m72/olaV1UbSCHfPJxOqg4CQa yCww== X-Forwarded-Encrypted: i=1; AJvYcCUAx1V7RHi21sZGhpk+Vod/aFdJIA2CGq713z/8RWC0upFtqb2/nj3Tib8e7mK8hqqhAKzjSCCX7k11/Sc=@vger.kernel.org X-Gm-Message-State: AOJu0YzycL6Xgm64vyTWTO9mVfpgFsbnU/cU1ZlREKxyQ6VBK49WbgTn wluxvLVJI06THHcEQ48hJdrP5JQFwGYFv9NMkf4af3JK1sqMaiewVhmjHWCsX4+nG0HN62UaReq 63mmwcO+rqq+eBXs4zjtksHwvtn6kW15Y+6ndqmBdLho9HQoNaZxs458= X-Google-Smtp-Source: AGHT+IGou4oflWYFQdjx+RLGT5CznwjT0apx/Xl+nviT3OW9mKOjUrhlSv7EOz3JrhSYCwvabRCGjgdczVYeqSvSCItTh5eClV7N Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:2283:b0:3d4:2ea4:6b8a with SMTP id e9e14a558f8ab-3d8125862b1mr4115275ab.22.1744741983155; Tue, 15 Apr 2025 11:33:03 -0700 (PDT) Date: Tue, 15 Apr 2025 11:33:03 -0700 In-Reply-To: <20250415154254.15330-1-aha310510@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67fea65f.050a0220.186b78.0007.GAE@google.com> Subject: Re: [syzbot] [udf?] possible deadlock in udf_free_blocks From: syzbot To: aha310510@gmail.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: WARNING: bad unlock balance in udf_free_blocks ===================================== WARNING: bad unlock balance detected! 6.15.0-rc2-syzkaller-00042-g1a1d569a75f3-dirty #0 Not tainted ------------------------------------- syz.0.17/6157 is trying to release lock (&sbi->s_alloc_mutex) at: [] udf_free_blocks+0x25e/0x23b0 fs/udf/balloc.c:678 but there are no more locks to release! other info that might help us debug this: 3 locks held by syz.0.17/6157: #0: ffff88806ddbc420 (sb_writers#12){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x220 fs/splice.c:1157 #1: ffff88805f0795c0 (&sb->s_type->i_mutex_key#21){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #1: ffff88805f0795c0 (&sb->s_type->i_mutex_key#21){+.+.}-{4:4}, at: udf_file_write_iter+0x6d/0x6c0 fs/udf/file.c:95 #2: ffff88805f0793f0 (&ei->i_data_sem#2){++++}-{4:4}, at: udf_map_block+0x3b9/0x53f0 fs/udf/inode.c:439 stack backtrace: CPU: 1 UID: 0 PID: 6157 Comm: syz.0.17 Not tainted 6.15.0-rc2-syzkaller-00042-g1a1d569a75f3-dirty #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_unlock_imbalance_bug+0x185/0x1a0 kernel/locking/lockdep.c:5296 __lock_release kernel/locking/lockdep.c:5535 [inline] lock_release+0x1ed/0x3e0 kernel/locking/lockdep.c:5887 __mutex_unlock_slowpath+0xee/0x800 kernel/locking/mutex.c:907 udf_free_blocks+0x25e/0x23b0 fs/udf/balloc.c:678 udf_merge_extents fs/udf/inode.c:1143 [inline] inode_getblk fs/udf/inode.c:914 [inline] udf_map_block+0x3061/0x53f0 fs/udf/inode.c:447 __udf_get_block+0x128/0x410 fs/udf/inode.c:461 __block_write_begin_int+0x693/0x1930 fs/buffer.c:2116 block_write_begin+0x8f/0x120 fs/buffer.c:2227 udf_write_begin+0xfc/0x250 fs/udf/inode.c:256 generic_perform_write+0x32b/0xa10 mm/filemap.c:4102 udf_file_write_iter+0x2e7/0x6c0 fs/udf/file.c:111 iter_file_splice_write+0xbe1/0x1530 fs/splice.c:738 do_splice_from fs/splice.c:935 [inline] direct_splice_actor+0x11d/0x220 fs/splice.c:1158 splice_direct_to_actor+0x597/0xc90 fs/splice.c:1102 do_splice_direct_actor fs/splice.c:1201 [inline] do_splice_direct+0x281/0x3d0 fs/splice.c:1227 do_sendfile+0x582/0x8c0 fs/read_write.c:1368 __do_sys_sendfile64 fs/read_write.c:1429 [inline] __se_sys_sendfile64+0x17e/0x1e0 fs/read_write.c:1415 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fedc3385d29 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fedc41b4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fedc3576080 RCX: 00007fedc3385d29 RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000005 RBP: 00007fedc3401aa8 R08: 0000000000000000 R09: 0000000000000000 R10: 0001000000201005 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fedc3576080 R15: 00007ffc4f30ca78 Tested on: commit: 1a1d569a Merge tag 'edac_urgent_for_v6.15_rc3' of git:.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16f90b98580000 kernel config: https://syzkaller.appspot.com/x/.config?x=5dd916f7ca732ed dashboard link: https://syzkaller.appspot.com/bug?extid=d472c32c5dd4cd2fb5c5 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=17c60b98580000