BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1487 in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 3499, name: syz-executor393 1 lock held by syz-executor393/3499: #0: ffffffff8c9451d8 (css_set_lock){....}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:388 [inline] #0: ffffffff8c9451d8 (css_set_lock){....}-{2:2}, at: cgroup_get_from_path+0x24/0x2e0 kernel/cgroup/cgroup.c:6620 irq event stamp: 15108 hardirqs last enabled at (15107): [] queue_delayed_work_on+0x171/0x250 kernel/workqueue.c:1719 hardirqs last disabled at (15108): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline] hardirqs last disabled at (15108): [] _raw_spin_lock_irq+0xa9/0x110 kernel/locking/spinlock.c:170 softirqs last enabled at (15090): [] invoke_softirq kernel/softirq.c:432 [inline] softirqs last enabled at (15090): [] __irq_exit_rcu+0x155/0x240 kernel/softirq.c:637 softirqs last disabled at (15075): [] invoke_softirq kernel/softirq.c:432 [inline] softirqs last disabled at (15075): [] __irq_exit_rcu+0x155/0x240 kernel/softirq.c:637 Preemption disabled at: [<0000000000000000>] 0x0 CPU: 1 PID: 3499 Comm: syz-executor393 Not tainted 5.15.152-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 ___might_sleep+0x547/0x6a0 kernel/sched/core.c:9626 down_read+0x21/0x2e0 kernel/locking/rwsem.c:1487 kernfs_walk_and_get_ns+0x7e/0x2b0 fs/kernfs/dir.c:908 kernfs_walk_and_get include/linux/kernfs.h:559 [inline] cgroup_get_from_path+0x5c/0x2e0 kernel/cgroup/cgroup.c:6622 cgroup_mt_check_v1+0x1a0/0x2b0 net/netfilter/xt_cgroup.c:56 xt_check_match+0x363/0xa30 net/netfilter/x_tables.c:523 check_match net/ipv4/netfilter/ip_tables.c:472 [inline] find_check_match net/ipv4/netfilter/ip_tables.c:488 [inline] find_check_entry net/ipv4/netfilter/ip_tables.c:538 [inline] translate_table+0x15bd/0x2250 net/ipv4/netfilter/ip_tables.c:717 do_replace net/ipv4/netfilter/ip_tables.c:1134 [inline] do_ipt_set_ctl+0x2c48/0x3e70 net/ipv4/netfilter/ip_tables.c:1628 nf_setsockopt+0x28a/0x2b0 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0x2732/0x3fb0 net/ipv4/ip_sockglue.c:1442 __sys_setsockopt+0x57e/0x990 net/socket.c:2198 __do_sys_setsockopt net/socket.c:2209 [inline] __se_sys_setsockopt net/socket.c:2206 [inline] __x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2206 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f3df6b118e9 Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc1091ff48 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007ffc10920118 RCX: 00007f3df6b118e9 RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f3df6b85610 R08: 0000000000001378 R09: 00007ffc10920118 R10: 0000000020000640 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc10920108 R14: 0000000000000001 R15: 0000000000000001 ============================= [ BUG: Invalid wait context ] 5.15.152-syzkaller #0 Tainted: G W ----------------------------- syz-executor393/3499 is trying to lock: ffffffff8ca519d0 (kernfs_rwsem){++++}-{3:3}, at: kernfs_walk_and_get_ns+0x7e/0x2b0 fs/kernfs/dir.c:908 other info that might help us debug this: context-{4:4} 1 lock held by syz-executor393/3499: #0: ffffffff8c9451d8 (css_set_lock){....}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:388 [inline] #0: ffffffff8c9451d8 (css_set_lock){....}-{2:2}, at: cgroup_get_from_path+0x24/0x2e0 kernel/cgroup/cgroup.c:6620 stack backtrace: CPU: 1 PID: 3499 Comm: syz-executor393 Tainted: G W 5.15.152-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_lock_invalid_wait_context kernel/locking/lockdep.c:4664 [inline] check_wait_context kernel/locking/lockdep.c:4725 [inline] __lock_acquire+0x14f5/0x1ff0 kernel/locking/lockdep.c:4962 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 down_read+0x45/0x2e0 kernel/locking/rwsem.c:1488 kernfs_walk_and_get_ns+0x7e/0x2b0 fs/kernfs/dir.c:908 kernfs_walk_and_get include/linux/kernfs.h:559 [inline] cgroup_get_from_path+0x5c/0x2e0 kernel/cgroup/cgroup.c:6622 cgroup_mt_check_v1+0x1a0/0x2b0 net/netfilter/xt_cgroup.c:56 xt_check_match+0x363/0xa30 net/netfilter/x_tables.c:523 check_match net/ipv4/netfilter/ip_tables.c:472 [inline] find_check_match net/ipv4/netfilter/ip_tables.c:488 [inline] find_check_entry net/ipv4/netfilter/ip_tables.c:538 [inline] translate_table+0x15bd/0x2250 net/ipv4/netfilter/ip_tables.c:717 do_replace net/ipv4/netfilter/ip_tables.c:1134 [inline] do_ipt_set_ctl+0x2c48/0x3e70 net/ipv4/netfilter/ip_tables.c:1628 nf_setsockopt+0x28a/0x2b0 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0x2732/0x3fb0 net/ipv4/ip_sockglue.c:1442 __sys_setsockopt+0x57e/0x990 net/socket.c:2198 __do_sys_setsockopt net/socket.c:2209 [inline] __se_sys_setsockopt net/socket.c:2206 [inline] __x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2206 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f3df6b118e9 Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc1091ff48 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007ffc10920118 RCX: 00007f3df6b118e9