Hello, syzbot found the following issue on: HEAD commit: 2f27fce67173 Merge tag 'sound-6.12-rc1' of git://git.kerne.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=10da7500580000 kernel config: https://syzkaller.appspot.com/x/.config?x=5d864366be695947 dashboard link: https://syzkaller.appspot.com/bug?extid=921873345a95f4dae7e9 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=12bdbfc7980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17acc69f980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/c167a07d047b/disk-2f27fce6.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/a68ac6093374/vmlinux-2f27fce6.xz kernel image: https://storage.googleapis.com/syzbot-assets/72a53f77d2bc/bzImage-2f27fce6.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+921873345a95f4dae7e9@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== BUG: KMSAN: uninit-value in netfs_clear_buffer+0x216/0x4e0 fs/netfs/misc.c:75 netfs_clear_buffer+0x216/0x4e0 fs/netfs/misc.c:75 netfs_free_request+0x51f/0x890 fs/netfs/objects.c:146 netfs_put_request+0x161/0x360 fs/netfs/objects.c:170 netfs_write_collection_worker+0x7337/0x7c20 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3312 worker_thread+0xea7/0x14f0 kernel/workqueue.c:3393 kthread+0x3e2/0x540 kernel/kthread.c:389 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Uninit was created at: slab_post_alloc_hook mm/slub.c:3995 [inline] slab_alloc_node mm/slub.c:4038 [inline] __kmalloc_cache_noprof+0x4f0/0xb00 mm/slub.c:4185 kmalloc_noprof include/linux/slab.h:690 [inline] netfs_buffer_append_folio+0x2cf/0x8b0 fs/netfs/misc.c:25 netfs_write_folio+0x1120/0x3050 fs/netfs/write_issue.c:421 netfs_writepages+0xe60/0x1670 fs/netfs/write_issue.c:541 do_writepages+0x427/0xc30 mm/page-writeback.c:2683 filemap_fdatawrite_wbc+0x1d8/0x270 mm/filemap.c:397 __filemap_fdatawrite_range mm/filemap.c:430 [inline] __filemap_fdatawrite mm/filemap.c:436 [inline] filemap_fdatawrite+0xbf/0xf0 mm/filemap.c:441 v9fs_dir_release+0x1f2/0x810 fs/9p/vfs_dir.c:219 __fput+0x32c/0x1120 fs/file_table.c:431 ____fput+0x25/0x30 fs/file_table.c:459 task_work_run+0x268/0x310 kernel/task_work.c:228 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0xd88/0x4050 kernel/exit.c:882 do_group_exit+0x2fe/0x390 kernel/exit.c:1031 __do_sys_exit_group kernel/exit.c:1042 [inline] __se_sys_exit_group kernel/exit.c:1040 [inline] __x64_sys_exit_group+0x3c/0x50 kernel/exit.c:1040 x64_sys_call+0x3b9a/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:232 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: 2945 Comm: kworker/u8:9 Not tainted 6.11.0-syzkaller-04557-g2f27fce67173 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: events_unbound netfs_write_collection_worker ===================================================== --- 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@xxxxxxxxxxxxxxxx. 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
