BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1497 in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 10054, name: syz.4.1735 1 lock held by syz.4.1735/10054: #0: ffffffff8c141778 (css_set_lock){..-.}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:388 [inline] #0: ffffffff8c141778 (css_set_lock){..-.}-{2:2}, at: cgroup_get_from_path+0x26/0x2f0 kernel/cgroup/cgroup.c:6627 irq event stamp: 618 hardirqs last enabled at (617): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (617): [] _raw_spin_unlock_irqrestore+0x82/0x100 kernel/locking/spinlock.c:194 hardirqs last disabled at (618): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline] hardirqs last disabled at (618): [] _raw_spin_lock_irq+0x7a/0xe0 kernel/locking/spinlock.c:170 softirqs last enabled at (592): [] do_ip_setsockopt net/ipv4/ip_sockglue.c:1369 [inline] softirqs last enabled at (592): [] ip_setsockopt+0x4c0/0x3070 net/ipv4/ip_sockglue.c:1430 softirqs last disabled at (590): [] spin_lock_bh include/linux/spinlock.h:368 [inline] softirqs last disabled at (590): [] release_sock+0x2b/0x1b0 net/core/sock.c:3264 Preemption disabled at: [<0000000000000000>] 0x0 CPU: 0 PID: 10054 Comm: syz.4.1735 Not tainted 5.15.181-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Call Trace: dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106 ___might_sleep+0x47c/0x600 kernel/sched/core.c:9639 down_read+0x20/0x2e0 kernel/locking/rwsem.c:1497 kernfs_walk_and_get_ns+0x81/0x2b0 fs/kernfs/dir.c:908 kernfs_walk_and_get include/linux/kernfs.h:559 [inline] cgroup_get_from_path+0x5f/0x2f0 kernel/cgroup/cgroup.c:6629 cgroup_mt_check_v1+0x1ae/0x2c0 net/netfilter/xt_cgroup.c:56 xt_check_match+0x3c6/0xaa0 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+0x14f8/0x1fe0 net/ipv4/netfilter/ip_tables.c:717 do_replace net/ipv4/netfilter/ip_tables.c:1138 [inline] do_ipt_set_ctl+0x96c/0xcf0 net/ipv4/netfilter/ip_tables.c:1636 nf_setsockopt+0x25f/0x280 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0x2127/0x3070 net/ipv4/ip_sockglue.c:1442 tcp_setsockopt+0x21a/0x1d70 net/ipv4/tcp.c:3713 __sys_setsockopt+0x3d6/0x5e0 net/socket.c:2203 __do_sys_setsockopt net/socket.c:2214 [inline] __se_sys_setsockopt net/socket.c:2211 [inline] __x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2211 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f6fbfa26969 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:00007f6fbd88e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f6fbfc4dfa0 RCX: 00007f6fbfa26969 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 RBP: 00007f6fbfaa8ab1 R08: 0000000000001300 R09: 0000000000000000 R10: 0000200000001000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f6fbfc4dfa0 R15: 00007fff9bded608 ============================= [ BUG: Invalid wait context ] 5.15.181-syzkaller #0 Tainted: G W ----------------------------- syz.4.1735/10054 is trying to lock: ffffffff8c24e0f0 (kernfs_rwsem){++++}-{3:3}, at: kernfs_walk_and_get_ns+0x81/0x2b0 fs/kernfs/dir.c:908 other info that might help us debug this: context-{4:4} 1 lock held by syz.4.1735/10054: #0: ffffffff8c141778 (css_set_lock){..-.}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:388 [inline] #0: ffffffff8c141778 (css_set_lock){..-.}-{2:2}, at: cgroup_get_from_path+0x26/0x2f0 kernel/cgroup/cgroup.c:6627 stack backtrace: CPU: 0 PID: 10054 Comm: syz.4.1735 Tainted: G W 5.15.181-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Call Trace: dump_stack_lvl+0x168/0x230 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+0x1be9/0x7c60 kernel/locking/lockdep.c:4962 lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623 down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 kernfs_walk_and_get_ns+0x81/0x2b0 fs/kernfs/dir.c:908 kernfs_walk_and_get include/linux/kernfs.h:559 [inline] cgroup_get_from_path+0x5f/0x2f0 kernel/cgroup/cgroup.c:6629 cgroup_mt_check_v1+0x1ae/0x2c0 net/netfilter/xt_cgroup.c:56 xt_check_match+0x3c6/0xaa0 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+0x14f8/0x1fe0 net/ipv4/netfilter/ip_tables.c:717 do_replace net/ipv4/netfilter/ip_tables.c:1138 [inline] do_ipt_set_ctl+0x96c/0xcf0 net/ipv4/netfilter/ip_tables.c:1636 nf_setsockopt+0x25f/0x280 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0x2127/0x3070 net/ipv4/ip_sockglue.c:1442 tcp_setsockopt+0x21a/0x1d70 net/ipv4/tcp.c:3713 __sys_setsockopt+0x3d6/0x5e0 net/socket.c:2203 __do_sys_setsockopt net/socket.c:2214 [inline] __se_sys_setsockopt net/socket.c:2211 [inline] __x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2211 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f6fbfa26969 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:00007f6fbd88e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f6fbfc4dfa0 RCX: 00007f6fbfa26969 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 RBP: 00007f6fbfaa8ab1 R08: 0000000000001300 R09: 0000000000000000 R10: 0000200000001000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f6fbfc4dfa0 R15: 00007fff9bded608 xt_cgroup: invalid path, errno=-2