Hello, syzbot found the following issue on:
HEAD commit: ab18b8fff124 Merge tag 'auxdisplay-v6.14-1' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13a47564580000 kernel config: https://syzkaller.appspot.com/x/.config?x=ac8df499d47c7efd dashboard link: https://syzkaller.appspot.com/bug?extid=de02219c78c082fe2f21 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/366f413714ce/disk-ab18b8ff.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5270d59ecedc/vmlinux-ab18b8ff.xz kernel image: https://storage.googleapis.com/syzbot-assets/43d7aec7a24c/bzImage-ab18b8ff.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: [email protected] ===================================================== BUG: KMSAN: uninit-value in btree_update_nodes_written fs/bcachefs/btree_update_interior.c:688 [inline] BUG: KMSAN: uninit-value in btree_interior_update_work+0xcef/0x4820 fs/bcachefs/btree_update_interior.c:844 btree_update_nodes_written fs/bcachefs/btree_update_interior.c:688 [inline] btree_interior_update_work+0xcef/0x4820 fs/bcachefs/btree_update_interior.c:844 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3317 worker_thread+0xea7/0x14f0 kernel/workqueue.c:3398 kthread+0x6b9/0xef0 kernel/kthread.c:464 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 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:645 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+0x4f0/0xb60 fs/bcachefs/btree_cache.c:652 bch2_fs_alloc fs/bcachefs/super.c:908 [inline] bch2_fs_open+0x4b24/0x59c0 fs/bcachefs/super.c:2053 bch2_fs_get_tree+0x986/0x2330 fs/bcachefs/fs.c:2190 vfs_get_tree+0xb1/0x5a0 fs/super.c:1814 do_new_mount+0x71f/0x15e0 fs/namespace.c:3560 path_mount+0x742/0x1f10 fs/namespace.c:3887 do_mount fs/namespace.c:3900 [inline] __do_sys_mount fs/namespace.c:4111 [inline] __se_sys_mount+0x71f/0x800 fs/namespace.c:4088 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4088 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: 5856 Comm: kworker/u8:4 Not tainted 6.13.0-syzkaller-06077-gab18b8fff124 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Workqueue: btree_update btree_interior_update_work ===================================================== --- 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 [email protected]. 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
