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charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 059dd502b263 Merge tag 'block-6.13-20241228' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=125ac6df980000 kernel config: https://syzkaller.appspot.com/x/.config?x=c078001e66e4a17e dashboard link: https://syzkaller.appspot.com/bug?extid=7848fee1f1e5c53f912b compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=165ac6df980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1755b0b0580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/b23b5d964e6e/disk-059dd502.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6c382805ea80/vmlinux-059dd502.xz kernel image: https://storage.googleapis.com/syzbot-assets/b17a5405f713/bzImage-059dd502.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7848fee1f1e5c53f912b@syzkaller.appspotmail.com ------------[ cut here ]------------ name len 256 WARNING: CPU: 0 PID: 9 at fs/proc/generic.c:405 __proc_create+0x75c/0x8b0 fs/proc/generic.c:405 Modules linked in: CPU: 0 UID: 0 PID: 9 Comm: kworker/0:1 Not tainted 6.13.0-rc4-syzkaller-00078-g059dd502b263 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: afs afs_manage_cell_work RIP: 0010:__proc_create+0x75c/0x8b0 fs/proc/generic.c:405 Code: 80 3c 02 00 0f 85 61 01 00 00 4d 8b 3c 24 e9 17 fb ff ff e8 56 92 63 ff 90 8b 74 24 04 48 c7 c7 00 6a 61 8b e8 85 58 24 ff 90 <0f> 0b 90 90 e9 7b ff ff ff 4c 89 ef e8 a3 01 c6 ff e9 9e fa ff ff RSP: 0018:ffffc900000e7a38 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 1ffff9200001cf49 RCX: ffffffff815a1729 RDX: ffff88801bee8000 RSI: ffffffff815a1736 RDI: 0000000000000001 RBP: 0000000000000100 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffffc900000e7b28 R13: ffff88802a3fa000 R14: 00000000000000ff R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000002b2e2000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: _proc_mkdir+0xbb/0x200 fs/proc/generic.c:489 proc_net_mkdir include/linux/proc_fs.h:232 [inline] afs_proc_cell_setup+0xbe/0x200 fs/afs/proc.c:682 afs_activate_cell fs/afs/cell.c:681 [inline] afs_manage_cell fs/afs/cell.c:761 [inline] afs_manage_cell_work+0x614/0x14b0 fs/afs/cell.c:828 process_one_work+0x958/0x1b30 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 --- 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@googlegroups.com. 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