syzbot has found a reproducer for the following issue on: HEAD commit: 88fac17500f4 Merge tag 'fuse-fixes-6.11-rc7' of git://git... git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=16802d63980000 kernel config: https://syzkaller.appspot.com/x/.config?x=35c699864e165c51 dashboard link: https://syzkaller.appspot.com/bug?extid=7a2ba6b7b66340cff225 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=168f8f0b980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1466d5b7980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6e5a9ba13ba0/disk-88fac175.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/229238ec073e/vmlinux-88fac175.xz kernel image: https://storage.googleapis.com/syzbot-assets/64327bdcda24/bzImage-88fac175.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/b6db4a705ad8/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7a2ba6b7b66340cff225@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== BUG: KMSAN: uninit-value in ntfs_fix_post_read fs/ntfs3/fsntfs.c:180 [inline] BUG: KMSAN: uninit-value in ntfs_read_bh+0x1eb/0xde0 fs/ntfs3/fsntfs.c:1317 ntfs_fix_post_read fs/ntfs3/fsntfs.c:180 [inline] ntfs_read_bh+0x1eb/0xde0 fs/ntfs3/fsntfs.c:1317 indx_read+0x44e/0x17b0 fs/ntfs3/index.c:1067 indx_find+0xd12/0x1440 fs/ntfs3/index.c:1181 indx_update_dup+0x607/0xf80 fs/ntfs3/index.c:2666 ni_update_parent+0x12de/0x14b0 fs/ntfs3/frecord.c:3301 ni_write_inode+0x1cf4/0x1de0 fs/ntfs3/frecord.c:3392 ntfs3_write_inode+0x94/0xb0 fs/ntfs3/inode.c:1052 write_inode fs/fs-writeback.c:1497 [inline] __writeback_single_inode+0x849/0x12c0 fs/fs-writeback.c:1716 writeback_sb_inodes+0xc95/0x1e00 fs/fs-writeback.c:1947 __writeback_inodes_wb+0x14c/0x440 fs/fs-writeback.c:2018 wb_writeback+0x50b/0xea0 fs/fs-writeback.c:2129 wb_check_background_flush fs/fs-writeback.c:2199 [inline] wb_do_writeback fs/fs-writeback.c:2287 [inline] wb_workfn+0x122c/0x1940 fs/fs-writeback.c:2314 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3312 worker_thread+0xea7/0x14d0 kernel/workqueue.c:3389 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 stored to memory at: ntfs_read_run_nb+0x786/0x1070 fs/ntfs3/fsntfs.c:1252 ntfs_read_bh+0x64/0xde0 fs/ntfs3/fsntfs.c:1313 indx_read+0x44e/0x17b0 fs/ntfs3/index.c:1067 indx_find+0xd12/0x1440 fs/ntfs3/index.c:1181 indx_update_dup+0x607/0xf80 fs/ntfs3/index.c:2666 ni_update_parent+0x12de/0x14b0 fs/ntfs3/frecord.c:3301 ni_write_inode+0x1cf4/0x1de0 fs/ntfs3/frecord.c:3392 ntfs3_write_inode+0x94/0xb0 fs/ntfs3/inode.c:1052 write_inode fs/fs-writeback.c:1497 [inline] __writeback_single_inode+0x849/0x12c0 fs/fs-writeback.c:1716 writeback_sb_inodes+0xc95/0x1e00 fs/fs-writeback.c:1947 __writeback_inodes_wb+0x14c/0x440 fs/fs-writeback.c:2018 wb_writeback+0x50b/0xea0 fs/fs-writeback.c:2129 wb_check_background_flush fs/fs-writeback.c:2199 [inline] wb_do_writeback fs/fs-writeback.c:2287 [inline] wb_workfn+0x122c/0x1940 fs/fs-writeback.c:2314 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3312 worker_thread+0xea7/0x14d0 kernel/workqueue.c:3389 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: __alloc_pages_noprof+0x9d6/0xe70 mm/page_alloc.c:4718 alloc_pages_mpol_noprof+0x299/0x990 mm/mempolicy.c:2263 alloc_pages_noprof mm/mempolicy.c:2343 [inline] folio_alloc_noprof+0x1db/0x310 mm/mempolicy.c:2350 filemap_alloc_folio_noprof+0xa6/0x440 mm/filemap.c:1008 __filemap_get_folio+0xa05/0x14b0 mm/filemap.c:1950 grow_dev_folio fs/buffer.c:1047 [inline] grow_buffers fs/buffer.c:1113 [inline] __getblk_slow fs/buffer.c:1139 [inline] bdev_getblk+0x2c9/0xab0 fs/buffer.c:1441 __getblk include/linux/buffer_head.h:381 [inline] sb_getblk include/linux/buffer_head.h:387 [inline] ntfs_get_bh+0x605/0x1190 fs/ntfs3/fsntfs.c:1365 indx_new+0x1bc/0x780 fs/ntfs3/index.c:955 indx_insert_into_root+0x2fd1/0x37d0 fs/ntfs3/index.c:1723 indx_insert_entry+0xe1d/0xee0 fs/ntfs3/index.c:1982 ntfs_create_inode+0x4391/0x4df0 fs/ntfs3/inode.c:1689 ntfs_mkdir+0x56/0x70 fs/ntfs3/namei.c:207 vfs_mkdir+0x4a0/0x780 fs/namei.c:4210 do_mkdirat+0x529/0x810 fs/namei.c:4233 __do_sys_mkdirat fs/namei.c:4248 [inline] __se_sys_mkdirat fs/namei.c:4246 [inline] __x64_sys_mkdirat+0xc6/0x120 fs/namei.c:4246 x64_sys_call+0x3a81/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:259 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: 3708 Comm: kworker/u8:20 Not tainted 6.11.0-rc6-syzkaller-00026-g88fac17500f4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: writeback wb_workfn (flush-7:0) ===================================================== --- 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.
