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charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: ce7f1a983b07 Add linux-next specific files for 20250923 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=118724e2580000 kernel config: https://syzkaller.appspot.com/x/.config?x=1be6fa3d47bce66e dashboard link: https://syzkaller.appspot.com/bug?extid=12479ae15958fc3f54ec compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1376e27c580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=136e78e2580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/c30be6f36c31/disk-ce7f1a98.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ae9ea347d4d8/vmlinux-ce7f1a98.xz kernel image: https://storage.googleapis.com/syzbot-assets/d59682a4f33c/bzImage-ce7f1a98.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+12479ae15958fc3f54ec@syzkaller.appspotmail.com BUG: sleeping function called from invalid context at fs/inode.c:1928 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 6028, name: syz.0.17 preempt_count: 1, expected: 0 RCU nest depth: 0, expected: 0 2 locks held by syz.0.17/6028: #0: ffff8880326bc0e0 (&type->s_umount_key#48){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff8880326bc0e0 (&type->s_umount_key#48){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff8880326bc0e0 (&type->s_umount_key#48){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:505 #1: ffff8880326bc998 (&s->s_inode_list_lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline] #1: ffff8880326bc998 (&s->s_inode_list_lock){+.+.}-{3:3}, at: hook_sb_delete+0xae/0xbd0 security/landlock/fs.c:1405 Preemption disabled at: [<0000000000000000>] 0x0 CPU: 0 UID: 0 PID: 6028 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 __might_resched+0x495/0x610 kernel/sched/core.c:8960 iput+0x2b/0xc50 fs/inode.c:1928 hook_sb_delete+0x6b5/0xbd0 security/landlock/fs.c:1468 security_sb_delete+0x80/0x150 security/security.c:1467 generic_shutdown_super+0xaa/0x2c0 fs/super.c:634 kill_anon_super fs/super.c:1281 [inline] kill_litter_super+0x76/0xb0 fs/super.c:1291 deactivate_locked_super+0xbc/0x130 fs/super.c:473 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1327 task_work_run+0x1d4/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xe9/0x130 kernel/entry/common.c:43 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc08e18eec9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffcd5efff18 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00007fc08e3e5fa0 RCX: 00007fc08e18eec9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00002000000002c0 RBP: 00007fc08e211f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc08e3e5fa0 R14: 00007fc08e3e5fa0 R15: 0000000000000002 --- 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