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AJvYcCWt0SZ6nvzcm18GyGCdYMEjnkys/15qM375Vz8Y6iciu9Owmk2VMkJSH0aiLbyRtm/d1DAr2CtS2ITAqpQ=@vger.kernel.org X-Gm-Message-State: AOJu0YwGnVcj9xyF1JAlBZp2A891cxPGq/s+MUeHx7onWiXtylPFNEnu DO8cIqjCVcWQHnzNPlUQsFmi7om1T+YDROr3yAt/ra2gIayN+N1aUIDtIzHhfA8TqrK+riAcVi0 QfXN8oA1mbRlLpDC6WL3ATOkPdRz9P/MHfqQbuhCU/YxG/9dQuaro7Tc= X-Google-Smtp-Source: AGHT+IGLLrirYgw/irC3GyTktsuxkp+/kOhSbKOzKWc9UZp+e/nw1MjPcW5wJrYaKSRLUeXZ4D6wAmvVAtvifprDZSVlw6hiMFFl Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1a21:b0:3a7:8208:b843 with SMTP id e9e14a558f8ab-3c2d5a27dccmr156803335ab.23.1735051343824; Tue, 24 Dec 2024 06:42:23 -0800 (PST) Date: Tue, 24 Dec 2024 06:42:23 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <676ac84f.050a0220.226966.005a.GAE@google.com> Subject: [syzbot] [bcachefs?] KMSAN: uninit-value in __bch2_bkey_cmp_left_packed 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: 8faabc041a00 Merge tag 'net-6.13-rc4' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10099cf8580000 kernel config: https://syzkaller.appspot.com/x/.config?x=caeefc00e8b4dc9f dashboard link: https://syzkaller.appspot.com/bug?extid=ed0bdc5b29ea2e281a83 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=131100c4580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/d3426cd3c012/disk-8faabc04.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/c05067e0c579/vmlinux-8faabc04.xz kernel image: https://storage.googleapis.com/syzbot-assets/4788f870d98f/bzImage-8faabc04.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/71ea5ea439f5/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ed0bdc5b29ea2e281a83@syzkaller.appspotmail.com done bcachefs (loop3): going read-write bcachefs (loop3): journal_replay... ===================================================== BUG: KMSAN: uninit-value in packed_to_bkey_c fs/bcachefs/bkey.h:251 [inline] BUG: KMSAN: uninit-value in __bch2_bkey_cmp_left_packed+0x256/0x770 fs/bcachefs/bkey.c:1046 packed_to_bkey_c fs/bcachefs/bkey.h:251 [inline] __bch2_bkey_cmp_left_packed+0x256/0x770 fs/bcachefs/bkey.c:1046 bkey_cmp_left_packed fs/bcachefs/bkey.h:88 [inline] bkey_iter_pos_cmp fs/bcachefs/bset.h:391 [inline] btree_path_advance_to_pos fs/bcachefs/btree_iter.c:599 [inline] __bch2_btree_path_set_pos+0x1a9b/0x1ec0 fs/bcachefs/btree_iter.c:1301 bch2_btree_path_set_pos fs/bcachefs/btree_iter.h:229 [inline] bch2_btree_iter_traverse+0x8d0/0x1020 fs/bcachefs/btree_iter.c:1875 wb_flush_one fs/bcachefs/btree_write_buffer.c:149 [inline] bch2_btree_write_buffer_flush_locked+0x28d3/0x7090 fs/bcachefs/btree_write_buffer.c:379 btree_write_buffer_flush_seq+0x2ec7/0x30b0 fs/bcachefs/btree_write_buffer.c:517 bch2_btree_write_buffer_journal_flush+0x103/0x1f0 fs/bcachefs/btree_write_buffer.c:533 journal_flush_pins+0xce6/0x1780 fs/bcachefs/journal_reclaim.c:565 journal_flush_done+0xe1/0x3f0 fs/bcachefs/journal_reclaim.c:819 bch2_journal_flush_pins+0x2a9/0x3b0 fs/bcachefs/journal_reclaim.c:852 bch2_journal_flush_all_pins fs/bcachefs/journal_reclaim.h:76 [inline] bch2_journal_replay+0x4937/0x4d30 fs/bcachefs/recovery.c:383 bch2_run_recovery_pass fs/bcachefs/recovery_passes.c:191 [inline] bch2_run_recovery_passes+0xaf9/0xf80 fs/bcachefs/recovery_passes.c:244 bch2_fs_recovery+0x447b/0x5b00 fs/bcachefs/recovery.c:861 bch2_fs_start+0x7b2/0xbd0 fs/bcachefs/super.c:1037 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: 6246 Comm: syz.3.37 Not tainted 6.13.0-rc3-syzkaller-00136-g8faabc041a00 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 ===================================================== --- 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 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