BUG: sleeping function called from invalid context at kernel/locking/mutex.c:577
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 4970, name: syz-executor.0
preempt_count: 1, expected: 0
RCU nest depth: 0, expected: 0
4 locks held by syz-executor.0/4970:
 #0: ffff88803ac28de8 (&type->i_mutex_dir_key#4){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:787 [inline]
 #0: ffff88803ac28de8 (&type->i_mutex_dir_key#4){++++}-{3:3}, at: lookup_slow fs/namei.c:1723 [inline]
 #0: ffff88803ac28de8 (&type->i_mutex_dir_key#4){++++}-{3:3}, at: walk_component+0x400/0x6a0 fs/namei.c:2020
 #1: ffffffff8bce3be0 (memcg_oom_lock#2){+.+.}-{0:0}, at: mem_cgroup_oom mm/memcontrol.c:1846 [inline]
 #1: ffffffff8bce3be0 (memcg_oom_lock#2){+.+.}-{0:0}, at: try_charge_memcg+0xb96/0x1130 mm/memcontrol.c:2647
 #2: ffffffff8bc65ea8 (oom_lock){+.+.}-{3:3}, at: mem_cgroup_out_of_memory+0x8d/0x270 mm/memcontrol.c:1607
 #3: ffff88802064e120 (&p->alloc_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline]
 #3: ffff88802064e120 (&p->alloc_lock){+.+.}-{2:2}, at: task_lock include/linux/sched/task.h:170 [inline]
 #3: ffff88802064e120 (&p->alloc_lock){+.+.}-{2:2}, at: find_lock_task_mm+0xe3/0x2b0 mm/oom_kill.c:144
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 1 PID: 4970 Comm: syz-executor.0 Not tainted 5.17.0-rc1-next-20220127-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 __might_resched.cold+0x222/0x26b kernel/sched/core.c:9576
 __mutex_lock_common kernel/locking/mutex.c:577 [inline]
 __mutex_lock+0x9f/0x12f0 kernel/locking/mutex.c:733
 futex_cleanup_begin kernel/futex/core.c:1058 [inline]
 futex_exit_release+0x26/0x220 kernel/futex/core.c:1110
 __oom_kill_process+0x373/0xf90 mm/oom_kill.c:893
 oom_kill_process+0xd7/0x5b0 mm/oom_kill.c:1003
 out_of_memory+0x358/0x14b0 mm/oom_kill.c:1132
 mem_cgroup_out_of_memory+0x206/0x270 mm/memcontrol.c:1617
 mem_cgroup_oom mm/memcontrol.c:1852 [inline]
 try_charge_memcg+0xe03/0x1130 mm/memcontrol.c:2647
 obj_cgroup_charge_pages+0x1e/0x90 mm/memcontrol.c:3017
 obj_cgroup_charge+0xf3/0x280 mm/memcontrol.c:3286
 memcg_slab_pre_alloc_hook mm/slab.h:490 [inline]
 slab_pre_alloc_hook mm/slab.h:710 [inline]
 slab_alloc_node mm/slub.c:3144 [inline]
 slab_alloc mm/slub.c:3238 [inline]
 kmem_cache_alloc+0x92/0x3a0 mm/slub.c:3243
 ext4_alloc_inode+0x1a/0x640 fs/ext4/super.c:1319
 alloc_inode+0x61/0x230 fs/inode.c:260
 iget_locked+0x1cc/0x740 fs/inode.c:1283
 __ext4_iget+0x3a1/0x4160 fs/ext4/inode.c:4702
 ext4_lookup fs/ext4/namei.c:1785 [inline]
 ext4_lookup+0x383/0x730 fs/ext4/namei.c:1760
 __lookup_slow+0x24c/0x480 fs/namei.c:1707
 lookup_slow fs/namei.c:1724 [inline]
 walk_component+0x40f/0x6a0 fs/namei.c:2020
 lookup_last fs/namei.c:2475 [inline]
 path_lookupat+0x1bb/0x860 fs/namei.c:2499
 filename_lookup+0x1c6/0x590 fs/namei.c:2528
 user_path_at_empty+0x42/0x60 fs/namei.c:2851
 user_path_at include/linux/namei.h:57 [inline]
 ksys_umount fs/namespace.c:1795 [inline]
 __do_sys_umount fs/namespace.c:1803 [inline]
 __se_sys_umount fs/namespace.c:1801 [inline]
 __x64_sys_umount+0xf8/0x180 fs/namespace.c:1801
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f50560e54c7
Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 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:00007fff13469308 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 0000000000000092 RCX: 00007f50560e54c7
RDX: 00007fff134693dd RSI: 000000000000000a RDI: 00007fff134693d0
RBP: 00007fff134693d0 R08: 00000000ffffffff R09: 00007fff134691a0
R10: 000055555744f853 R11: 0000000000000246 R12: 00007f505613d1ea
R13: 00007fff1346a490 R14: 000055555744f810 R15: 00007fff1346a4d0
 </TASK>

=============================
[ BUG: Invalid wait context ]
5.17.0-rc1-next-20220127-syzkaller #0 Tainted: G        W        
-----------------------------
syz-executor.0/4970 is trying to lock:
ffff88802064eb40 (&tsk->futex_exit_mutex){+.+.}-{3:3}, at: futex_cleanup_begin kernel/futex/core.c:1058 [inline]
ffff88802064eb40 (&tsk->futex_exit_mutex){+.+.}-{3:3}, at: futex_exit_release+0x26/0x220 kernel/futex/core.c:1110
other info that might help us debug this:
context-{4:4}
4 locks held by syz-executor.0/4970:
 #0: ffff88803ac28de8 (&type->i_mutex_dir_key#4){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:787 [inline]
 #0: ffff88803ac28de8 (&type->i_mutex_dir_key#4){++++}-{3:3}, at: lookup_slow fs/namei.c:1723 [inline]
 #0: ffff88803ac28de8 (&type->i_mutex_dir_key#4){++++}-{3:3}, at: walk_component+0x400/0x6a0 fs/namei.c:2020
 #1: ffffffff8bce3be0 (memcg_oom_lock#2){+.+.}-{0:0}, at: mem_cgroup_oom mm/memcontrol.c:1846 [inline]
 #1: ffffffff8bce3be0 (memcg_oom_lock#2){+.+.}-{0:0}, at: try_charge_memcg+0xb96/0x1130 mm/memcontrol.c:2647
 #2: ffffffff8bc65ea8 (oom_lock){+.+.}-{3:3}, at: mem_cgroup_out_of_memory+0x8d/0x270 mm/memcontrol.c:1607
 #3: ffff88802064e120 (&p->alloc_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline]
 #3: ffff88802064e120 (&p->alloc_lock){+.+.}-{2:2}, at: task_lock include/linux/sched/task.h:170 [inline]
 #3: ffff88802064e120 (&p->alloc_lock){+.+.}-{2:2}, at: find_lock_task_mm+0xe3/0x2b0 mm/oom_kill.c:144
stack backtrace:
CPU: 1 PID: 4970 Comm: syz-executor.0 Tainted: G        W         5.17.0-rc1-next-20220127-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 print_lock_invalid_wait_context kernel/locking/lockdep.c:4678 [inline]
 check_wait_context kernel/locking/lockdep.c:4739 [inline]
 __lock_acquire.cold+0x213/0x3ab kernel/locking/lockdep.c:4977
 lock_acquire kernel/locking/lockdep.c:5639 [inline]
 lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5604
 __mutex_lock_common kernel/locking/mutex.c:600 [inline]
 __mutex_lock+0x12f/0x12f0 kernel/locking/mutex.c:733
 futex_cleanup_begin kernel/futex/core.c:1058 [inline]
 futex_exit_release+0x26/0x220 kernel/futex/core.c:1110
 __oom_kill_process+0x373/0xf90 mm/oom_kill.c:893
 oom_kill_process+0xd7/0x5b0 mm/oom_kill.c:1003
 out_of_memory+0x358/0x14b0 mm/oom_kill.c:1132
 mem_cgroup_out_of_memory+0x206/0x270 mm/memcontrol.c:1617
 mem_cgroup_oom mm/memcontrol.c:1852 [inline]
 try_charge_memcg+0xe03/0x1130 mm/memcontrol.c:2647
 obj_cgroup_charge_pages+0x1e/0x90 mm/memcontrol.c:3017
 obj_cgroup_charge+0xf3/0x280 mm/memcontrol.c:3286
 memcg_slab_pre_alloc_hook mm/slab.h:490 [inline]
 slab_pre_alloc_hook mm/slab.h:710 [inline]
 slab_alloc_node mm/slub.c:3144 [inline]
 slab_alloc mm/slub.c:3238 [inline]
 kmem_cache_alloc+0x92/0x3a0 mm/slub.c:3243
 ext4_alloc_inode+0x1a/0x640 fs/ext4/super.c:1319
 alloc_inode+0x61/0x230 fs/inode.c:260
 iget_locked+0x1cc/0x740 fs/inode.c:1283
 __ext4_iget+0x3a1/0x4160 fs/ext4/inode.c:4702
 ext4_lookup fs/ext4/namei.c:1785 [inline]
 ext4_lookup+0x383/0x730 fs/ext4/namei.c:1760
 __lookup_slow+0x24c/0x480 fs/namei.c:1707
 lookup_slow fs/namei.c:1724 [inline]
 walk_component+0x40f/0x6a0 fs/namei.c:2020
 lookup_last fs/namei.c:2475 [inline]
 path_lookupat+0x1bb/0x860 fs/namei.c:2499
 filename_lookup+0x1c6/0x590 fs/namei.c:2528
 user_path_at_empty+0x42/0x60 fs/namei.c:2851
 user_path_at include/linux/namei.h:57 [inline]
 ksys_umount fs/namespace.c:1795 [inline]
 __do_sys_umount fs/namespace.c:1803 [inline]
 __se_sys_umount fs/namespace.c:1801 [inline]
 __x64_sys_umount+0xf8/0x180 fs/namespace.c:1801
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f50560e54c7
Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 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:00007fff13469308 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 0000000000000092 RCX: 00007f50560e54c7
RDX: 00007fff134693dd RSI: 000000000000000a RDI: 00007fff134693d0
RBP: 00007fff134693d0 R08: 00000000ffffffff R09: 00007fff134691a0
R10: 000055555744f853 R11: 0000000000000246 R12: 00007f505613d1ea
R13: 00007fff1346a490 R14: 000055555744f810 R15: 00007fff1346a4d0
 </TASK>
BUG: sleeping function called from invalid context at kernel/futex/core.c:750
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 4970, name: syz-executor.0
preempt_count: 1, expected: 0
RCU nest depth: 0, expected: 0
INFO: lockdep is turned off.
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 1 PID: 4970 Comm: syz-executor.0 Tainted: G        W         5.17.0-rc1-next-20220127-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 __might_resched.cold+0x222/0x26b kernel/sched/core.c:9576
 __might_fault+0x6c/0x170 mm/memory.c:5269
 fetch_robust_entry kernel/futex/core.c:750 [inline]
 exit_robust_list+0x5d/0x2c0 kernel/futex/core.c:778
 futex_cleanup kernel/futex/core.c:1010 [inline]
 futex_exit_release+0x183/0x220 kernel/futex/core.c:1111
 __oom_kill_process+0x373/0xf90 mm/oom_kill.c:893
 oom_kill_process+0xd7/0x5b0 mm/oom_kill.c:1003
 out_of_memory+0x358/0x14b0 mm/oom_kill.c:1132
 mem_cgroup_out_of_memory+0x206/0x270 mm/memcontrol.c:1617
 mem_cgroup_oom mm/memcontrol.c:1852 [inline]
 try_charge_memcg+0xe03/0x1130 mm/memcontrol.c:2647
 obj_cgroup_charge_pages+0x1e/0x90 mm/memcontrol.c:3017
 obj_cgroup_charge+0xf3/0x280 mm/memcontrol.c:3286
 memcg_slab_pre_alloc_hook mm/slab.h:490 [inline]
 slab_pre_alloc_hook mm/slab.h:710 [inline]
 slab_alloc_node mm/slub.c:3144 [inline]
 slab_alloc mm/slub.c:3238 [inline]
 kmem_cache_alloc+0x92/0x3a0 mm/slub.c:3243
 ext4_alloc_inode+0x1a/0x640 fs/ext4/super.c:1319
 alloc_inode+0x61/0x230 fs/inode.c:260
 iget_locked+0x1cc/0x740 fs/inode.c:1283
 __ext4_iget+0x3a1/0x4160 fs/ext4/inode.c:4702
 ext4_lookup fs/ext4/namei.c:1785 [inline]
 ext4_lookup+0x383/0x730 fs/ext4/namei.c:1760
 __lookup_slow+0x24c/0x480 fs/namei.c:1707
 lookup_slow fs/namei.c:1724 [inline]
 walk_component+0x40f/0x6a0 fs/namei.c:2020
 lookup_last fs/namei.c:2475 [inline]
 path_lookupat+0x1bb/0x860 fs/namei.c:2499
 filename_lookup+0x1c6/0x590 fs/namei.c:2528
 user_path_at_empty+0x42/0x60 fs/namei.c:2851
 user_path_at include/linux/namei.h:57 [inline]
 ksys_umount fs/namespace.c:1795 [inline]
 __do_sys_umount fs/namespace.c:1803 [inline]
 __se_sys_umount fs/namespace.c:1801 [inline]
 __x64_sys_umount+0xf8/0x180 fs/namespace.c:1801
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f50560e54c7
Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 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:00007fff13469308 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 0000000000000092 RCX: 00007f50560e54c7
RDX: 00007fff134693dd RSI: 000000000000000a RDI: 00007fff134693d0
RBP: 00007fff134693d0 R08: 00000000ffffffff R09: 00007fff134691a0
R10: 000055555744f853 R11: 0000000000000246 R12: 00007f505613d1ea
R13: 00007fff1346a490 R14: 000055555744f810 R15: 00007fff1346a4d0
 </TASK>
Memory cgroup out of memory: Killed process 4970 (syz-executor.0) total-vm:56676kB, anon-rss:384kB, file-rss:15180kB, shmem-rss:64kB, UID:0 pgtables:80kB oom_score_adj:0