Hello, syzbot found the following issue on: HEAD commit: eb7081409f94 Linux 6.1-rc6 git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=144359f9880000 kernel config: https://syzkaller.appspot.com/x/.config?x=8232c7627e3f923 dashboard link: https://syzkaller.appspot.com/bug?extid=462da39f0667b357c4b6 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11a17fe9880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13e6c4c3880000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/77fa14383845/disk-eb708140.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/26d9898f9467/vmlinux-eb708140.xz kernel image: https://storage.googleapis.com/syzbot-assets/a5e417bc4c34/bzImage-eb708140.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+462da39f0667b357c4b6@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ WARNING: CPU: 0 PID: 3638 at fs/attr.c:327 notify_change+0xf16/0x1440 fs/attr.c:327 Modules linked in: CPU: 0 PID: 3638 Comm: syz-executor162 Not tainted 6.1.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:notify_change+0xf16/0x1440 fs/attr.c:327 Code: 70 97 0a 00 e8 7b d7 9c ff 48 8b 7d c8 48 89 de e8 bf ce f2 01 44 89 fe 48 89 df e8 b4 12 f3 01 e9 aa f6 ff ff e8 5a d7 9c ff <0f> 0b e9 d9 f1 ff ff e8 4e d7 9c ff 44 8b 7d b0 4c 89 ea 48 b8 00 RSP: 0018:ffffc90003bef820 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888075b73be8 RCX: 0000000000000000 RDX: ffff88801c2657c0 RSI: ffffffff81e342b6 RDI: 0000000000000007 RBP: ffffc90003bef890 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90003bef8e8 R13: ffff888073fe0000 R14: 0000000000000000 R15: 0000000000004200 FS: 00007f689a75a700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f689a718718 CR3: 00000000176f8000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __remove_privs fs/inode.c:2013 [inline] __file_remove_privs+0x415/0x600 fs/inode.c:2034 file_modified_flags+0xa4/0x320 fs/inode.c:2148 fuse_file_fallocate+0x4d4/0x930 fs/fuse/file.c:3004 vfs_fallocate+0x48b/0xe00 fs/open.c:323 ioctl_preallocate+0x18e/0x200 fs/ioctl.c:290 file_ioctl fs/ioctl.c:330 [inline] do_vfs_ioctl+0x12e9/0x1600 fs/ioctl.c:849 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x10c/0x210 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f689a7a85b9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 81 14 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f689a75a2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f689a8344c0 RCX: 00007f689a7a85b9 RDX: 00000000200001c0 RSI: 0000000040305828 RDI: 0000000000000004 RBP: 00007f689a8020d4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e R13: 00007f689a7fe0c8 R14: 00007f689a8000d0 R15: 00007f689a8344c8 </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. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
