Hello, syzbot found the following issue on: HEAD commit: cea5425829f7 Add linux-next specific files for 20240930 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=161c439f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=41a28720ed564c6a dashboard link: https://syzkaller.appspot.com/bug?extid=f69287fa1bf99c7c3321 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/566995596f19/disk-cea54258.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e7c506c1c71d/vmlinux-cea54258.xz kernel image: https://storage.googleapis.com/syzbot-assets/7fcb4468b8c0/bzImage-cea54258.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f69287fa1bf99c7c3321@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ WARNING: CPU: 1 PID: 12 at fs/fuse/file.c:1989 fuse_write_file_get+0xb8/0xf0 fs/fuse/file.c:1989 Modules linked in: CPU: 1 UID: 0 PID: 12 Comm: kworker/u8:1 Not tainted 6.12.0-rc1-next-20240930-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: writeback wb_workfn (flush-0:57) RIP: 0010:fuse_write_file_get+0xb8/0xf0 fs/fuse/file.c:1989 Code: ff ff ff ff e8 29 d2 7b fe 09 dd 78 3c e8 e0 cd 7b fe 4c 89 f7 e8 78 79 b8 08 eb 11 e8 d1 cd 7b fe 4c 89 f7 e8 69 79 b8 08 90 <0f> 0b 90 4c 89 e0 5b 41 5c 41 5e 41 5f 5d c3 cc cc cc cc e8 b0 cd RSP: 0018:ffffc900001170d0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88805dbe4610 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001 RBP: ffffc90000117210 R08: ffff88805dbe477b R09: 1ffff1100bb7c8ef R10: dffffc0000000000 R11: ffffed100bb7c8f0 R12: 0000000000000000 R13: 1ffff92000022e28 R14: ffff88805dbe4778 R15: ffff88805dbe4140 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c302213 CR3: 0000000067444000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> fuse_writepages+0x259/0x4f0 fs/fuse/file.c:2368 do_writepages+0x35d/0x870 mm/page-writeback.c:2683 __writeback_single_inode+0x14f/0x10d0 fs/fs-writeback.c:1658 writeback_sb_inodes+0x80c/0x1370 fs/fs-writeback.c:1954 wb_writeback+0x41b/0xbd0 fs/fs-writeback.c:2134 wb_do_writeback fs/fs-writeback.c:2281 [inline] wb_workfn+0x410/0x1090 fs/fs-writeback.c:2321 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> --- 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 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
