From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f77.google.com (mail-io1-f77.google.com [209.85.166.77]) (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 CED6714901B for ; Fri, 3 Jan 2025 01:56:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.77 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735869393; cv=none; b=NPg7XtkCu4qQf0NJtOZSj9lY2ajhgmYF9ws855YA7q/y6f2kKFjGAUDR4NPDO3BcrZNfVsyP82G0Gyt/J7AsTusYdG44tvX4DWfSAweixQMk7FyUhry0HkNTPSKlLJg93eMzrDMcjRtcLgLAONvyMJDtenYg+lG4x8oVQwchJts= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735869393; c=relaxed/simple; bh=KYa0I+zvL5Olwd51o/XuOIywgCpwFMNQ3POdVhvS2dQ=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=l6kmNbKL+fxnmKoBvSw/t+nb586FJtzGsyIExc72JWRpYQDj7t7lWQw1SLZNqdojtP9rxx74qkl4BWzuk+GElb6mNin1Ql9PSwNbyWixLqtXJSd+IOkhoZ7DIoM75mLUOVir0IpeN1cnBn7i6faYc3An73sEaXO213e1Vl8djcM= 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=209.85.166.77 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-io1-f77.google.com with SMTP id ca18e2360f4ac-844cfac2578so1973714439f.2 for ; Thu, 02 Jan 2025 17:56:31 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1735869391; x=1736474191; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=pt1JwDi9f994YyNsx2aoKsXHj4IzW6UoI2OIuqlIW68=; b=JLesdgNsY6VKmyfBLFrzAUxMf15WeuDojfvQ8lWtYJ2PN++hwUd5tlGYr6CnVnvlfo +vXniJAXzPzT3VfD131GsEQR2Ej7Z0i7/OYpL9jIMNrCqgHwX4hQVD+Vw9HQUoKXZHCu 8SBZ1fHzUeylcO/9z8SdhWW7TEIklVg/0KbQz+OI94ZgAR6Yf7nuOpePYPC0cSGPAdrg HbTCLYTq9wn8biwHpqfULMSKTtXmYb1wVlwBShja4zlLcFMZkaM+CpKpiFCza19mKuZ9 le434j+cy/xfXt09CYnnXLN8BPTrlihGhBsxzDh4Om6tKP98T2ryntX4BknDCXNv5NbJ LPgw== X-Forwarded-Encrypted: i=1; AJvYcCVR2aJaSCKHY64FYOS2LfN5SCd0+22Yr01QhnVQioIs3CncvnOcbACwEzna+XxJNEfqrpkSKdAxDuJ9Ozc=@vger.kernel.org X-Gm-Message-State: AOJu0YwbZ8AjFvTwAy6whKjr0CtV1NusW3qlXa2OLF6V1w+FxkwROTAu 5gfGru64bg8X9HMS+NsI42f4aLJpt824pQH3bnUM7nJLYaKKLV18c6IfsGa2PZVRBAwXVRbicDw qHE3r+0EW0JekPWaju9S2U1kvkMIllDZ93Oh63XDpTFRe8+2bOg9bLkY= X-Google-Smtp-Source: AGHT+IGFnBpy5YMuCy8RhHgRVvxy1K/fXuGSl/K20kBGrIGDx/u3rhHLOSWWi4rtyl065QW9O/4lKnHLS1ssm1gqa1E4SeS8/rGG Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:20e8:b0:3a7:78a8:1fb4 with SMTP id e9e14a558f8ab-3c2d2f47732mr355544915ab.13.1735869390991; Thu, 02 Jan 2025 17:56:30 -0800 (PST) Date: Thu, 02 Jan 2025 17:56:30 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <677743ce.050a0220.178762.0036.GAE@google.com> Subject: [syzbot] [bcachefs?] KMSAN: uninit-value in bch2_trans_start_alloc_update_noupdate From: syzbot To: kent.overstreet@linux.dev, linux-bcachefs@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 4099a71718b0 Merge tag 'sched-urgent-2024-12-29' of git://.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=103e70b0580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f9048090d7bb0d06 dashboard link: https://syzkaller.appspot.com/bug?extid=3304ecaea706d3a6524c compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/62835b60de83/disk-4099a717.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/9262b999e6be/vmlinux-4099a717.xz kernel image: https://storage.googleapis.com/syzbot-assets/3fc8cec4d596/bzImage-4099a717.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3304ecaea706d3a6524c@syzkaller.appspotmail.com bcachefs (loop3): starting version 1.7: mi_btree_bitmap opts=errors=continue,metadata_checksum=none,data_checksum=none,compression=lz4,nojournal_transaction_names bcachefs (loop3): initializing new filesystem bcachefs (loop3): going read-write bcachefs (loop3): marking superblocks ===================================================== BUG: KMSAN: uninit-value in bch2_alloc_to_v4_mut_inlined fs/bcachefs/alloc_background.c:447 [inline] BUG: KMSAN: uninit-value in bch2_trans_start_alloc_update_noupdate+0x61b/0x12f0 fs/bcachefs/alloc_background.c:472 bch2_alloc_to_v4_mut_inlined fs/bcachefs/alloc_background.c:447 [inline] bch2_trans_start_alloc_update_noupdate+0x61b/0x12f0 fs/bcachefs/alloc_background.c:472 __bch2_trans_mark_metadata_bucket fs/bcachefs/buckets.c:958 [inline] bch2_trans_mark_metadata_bucket+0x2e6/0x2430 fs/bcachefs/buckets.c:1048 __bch2_trans_mark_dev_sb fs/bcachefs/buckets.c:1120 [inline] bch2_trans_mark_dev_sb+0xcf7/0x10e0 fs/bcachefs/buckets.c:1133 bch2_trans_mark_dev_sbs_flags+0x3e5/0x9f0 fs/bcachefs/buckets.c:1143 bch2_trans_mark_dev_sbs+0x32/0x40 fs/bcachefs/buckets.c:1155 bch2_fs_initialize+0x19bd/0x35d0 fs/bcachefs/recovery.c:1074 bch2_fs_start+0x77d/0xbd0 fs/bcachefs/super.c:1038 bch2_fs_get_tree+0x13ea/0x22d0 fs/bcachefs/fs.c:2170 vfs_get_tree+0xb1/0x5a0 fs/super.c:1814 do_new_mount+0x71f/0x15e0 fs/namespace.c:3507 path_mount+0x742/0x1f10 fs/namespace.c:3834 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4057 [inline] __se_sys_mount+0x722/0x810 fs/namespace.c:4034 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4034 x64_sys_call+0x39bf/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was stored to memory at: memcpy_u64s_small fs/bcachefs/util.h:393 [inline] bkey_reassemble fs/bcachefs/bkey.h:513 [inline] btree_key_cache_create fs/bcachefs/btree_key_cache.c:259 [inline] btree_key_cache_fill+0x13da/0x3d60 fs/bcachefs/btree_key_cache.c:309 bch2_btree_path_traverse_cached+0x988/0xe20 fs/bcachefs/btree_key_cache.c:361 bch2_btree_path_traverse_one+0x749/0x47b0 fs/bcachefs/btree_iter.c:1159 bch2_btree_path_traverse fs/bcachefs/btree_iter.h:247 [inline] bch2_btree_iter_peek_slot+0x10b7/0x3950 fs/bcachefs/btree_iter.c:2629 __bch2_bkey_get_iter fs/bcachefs/btree_iter.h:575 [inline] bch2_bkey_get_iter fs/bcachefs/btree_iter.h:589 [inline] bch2_trans_start_alloc_update_noupdate+0x390/0x12f0 fs/bcachefs/alloc_background.c:464 __bch2_trans_mark_metadata_bucket fs/bcachefs/buckets.c:958 [inline] bch2_trans_mark_metadata_bucket+0x2e6/0x2430 fs/bcachefs/buckets.c:1048 __bch2_trans_mark_dev_sb fs/bcachefs/buckets.c:1120 [inline] bch2_trans_mark_dev_sb+0xcf7/0x10e0 fs/bcachefs/buckets.c:1133 bch2_trans_mark_dev_sbs_flags+0x3e5/0x9f0 fs/bcachefs/buckets.c:1143 bch2_trans_mark_dev_sbs+0x32/0x40 fs/bcachefs/buckets.c:1155 bch2_fs_initialize+0x19bd/0x35d0 fs/bcachefs/recovery.c:1074 bch2_fs_start+0x77d/0xbd0 fs/bcachefs/super.c:1038 bch2_fs_get_tree+0x13ea/0x22d0 fs/bcachefs/fs.c:2170 vfs_get_tree+0xb1/0x5a0 fs/super.c:1814 do_new_mount+0x71f/0x15e0 fs/namespace.c:3507 path_mount+0x742/0x1f10 fs/namespace.c:3834 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4057 [inline] __se_sys_mount+0x722/0x810 fs/namespace.c:4034 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4034 x64_sys_call+0x39bf/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: ___kmalloc_large_node+0x22c/0x370 mm/slub.c:4253 __kmalloc_large_node_noprof+0x3f/0x1e0 mm/slub.c:4270 __do_kmalloc_node mm/slub.c:4286 [inline] __kmalloc_node_noprof+0xc96/0x1250 mm/slub.c:4304 __kvmalloc_node_noprof+0xc0/0x2d0 mm/util.c:650 btree_node_data_alloc fs/bcachefs/btree_cache.c:153 [inline] __bch2_btree_node_mem_alloc+0x2be/0xa80 fs/bcachefs/btree_cache.c:198 bch2_fs_btree_cache_init+0x4e4/0xb50 fs/bcachefs/btree_cache.c:653 bch2_fs_alloc fs/bcachefs/super.c:917 [inline] bch2_fs_open+0x4d3a/0x5b40 fs/bcachefs/super.c:2065 bch2_fs_get_tree+0x983/0x22d0 fs/bcachefs/fs.c:2157 vfs_get_tree+0xb1/0x5a0 fs/super.c:1814 do_new_mount+0x71f/0x15e0 fs/namespace.c:3507 path_mount+0x742/0x1f10 fs/namespace.c:3834 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4057 [inline] __se_sys_mount+0x722/0x810 fs/namespace.c:4034 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4034 x64_sys_call+0x39bf/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 0 UID: 0 PID: 10842 Comm: syz.3.1345 Not tainted 6.13.0-rc4-syzkaller-00110-g4099a71718b0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ===================================================== --- 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 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