BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1497 in_atomic(): 1, irqs_disabled(): 128, non_block: 0, pid: 4465, name: syz.3.82 1 lock held by syz.3.82/4465: #0: ffff800014346478 (css_set_lock){..-.}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:388 [inline] #0: ffff800014346478 (css_set_lock){..-.}-{2:2}, at: cgroup_get_from_path+0x30/0x300 kernel/cgroup/cgroup.c:6627 irq event stamp: 140 hardirqs last enabled at (139): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (139): [] _raw_spin_unlock_irqrestore+0xa8/0x14c kernel/locking/spinlock.c:194 hardirqs last disabled at (140): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline] hardirqs last disabled at (140): [] _raw_spin_lock_irq+0x38/0x13c kernel/locking/spinlock.c:170 softirqs last enabled at (124): [] spin_unlock_bh include/linux/spinlock.h:408 [inline] softirqs last enabled at (124): [] release_sock+0x1d0/0x258 net/core/sock.c:3279 softirqs last disabled at (122): [] spin_lock_bh include/linux/spinlock.h:368 [inline] softirqs last disabled at (122): [] release_sock+0x34/0x258 net/core/sock.c:3266 Preemption disabled at: [] spin_lock_irq include/linux/spinlock.h:388 [inline] [] cgroup_get_from_path+0x30/0x300 kernel/cgroup/cgroup.c:6627 CPU: 0 PID: 4465 Comm: syz.3.82 Not tainted 5.15.180-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Call trace: dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 dump_stack+0x1c/0x5c lib/dump_stack.c:113 ___might_sleep+0x358/0x4d4 kernel/sched/core.c:9639 __might_sleep+0x98/0x124 kernel/sched/core.c:9593 down_read+0x3c/0x390 kernel/locking/rwsem.c:1497 kernfs_walk_and_get_ns+0x8c/0x2fc fs/kernfs/dir.c:908 kernfs_walk_and_get include/linux/kernfs.h:559 [inline] cgroup_get_from_path+0x64/0x300 kernel/cgroup/cgroup.c:6629 cgroup_mt_check_v1+0x18c/0x278 net/netfilter/xt_cgroup.c:56 xt_check_match+0x314/0x8a0 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+0xf60/0x17fc net/ipv4/netfilter/ip_tables.c:717 do_replace net/ipv4/netfilter/ip_tables.c:1138 [inline] do_ipt_set_ctl+0xa10/0xe00 net/ipv4/netfilter/ip_tables.c:1636 nf_setsockopt+0x270/0x290 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0x1d0c/0x2978 net/ipv4/ip_sockglue.c:1442 tcp_setsockopt+0x1d4/0x1bf4 net/ipv4/tcp.c:3713 sock_common_setsockopt+0xb0/0xcc net/core/sock.c:3448 __sys_setsockopt+0x2f8/0x4b0 net/socket.c:2203 __do_sys_setsockopt net/socket.c:2214 [inline] __se_sys_setsockopt net/socket.c:2211 [inline] __arm64_sys_setsockopt+0xb8/0xd4 net/socket.c:2211 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 ============================= [ BUG: Invalid wait context ] 5.15.180-syzkaller #0 Tainted: G W ----------------------------- syz.3.82/4465 is trying to lock: ffff8000144467b0 (kernfs_rwsem){++++}-{3:3}, at: kernfs_walk_and_get_ns+0x8c/0x2fc fs/kernfs/dir.c:908 other info that might help us debug this: context-{4:4} 1 lock held by syz.3.82/4465: #0: ffff800014346478 (css_set_lock){..-.}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:388 [inline] #0: ffff800014346478 (css_set_lock){..-.}-{2:2}, at: cgroup_get_from_path+0x30/0x300 kernel/cgroup/cgroup.c:6627 stack backtrace: CPU: 0 PID: 4465 Comm: syz.3.82 Tainted: G W 5.15.180-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Call trace: dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 dump_stack+0x1c/0x5c lib/dump_stack.c:113 print_lock_invalid_wait_context kernel/locking/lockdep.c:4664 [inline] check_wait_context kernel/locking/lockdep.c:4725 [inline] __lock_acquire+0x1acc/0x651c kernel/locking/lockdep.c:4962 lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623 down_read+0xc0/0x390 kernel/locking/rwsem.c:1498 kernfs_walk_and_get_ns+0x8c/0x2fc fs/kernfs/dir.c:908 kernfs_walk_and_get include/linux/kernfs.h:559 [inline] cgroup_get_from_path+0x64/0x300 kernel/cgroup/cgroup.c:6629 cgroup_mt_check_v1+0x18c/0x278 net/netfilter/xt_cgroup.c:56 xt_check_match+0x314/0x8a0 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+0xf60/0x17fc net/ipv4/netfilter/ip_tables.c:717 do_replace net/ipv4/netfilter/ip_tables.c:1138 [inline] do_ipt_set_ctl+0xa10/0xe00 net/ipv4/netfilter/ip_tables.c:1636 nf_setsockopt+0x270/0x290 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0x1d0c/0x2978 net/ipv4/ip_sockglue.c:1442 tcp_setsockopt+0x1d4/0x1bf4 net/ipv4/tcp.c:3713 sock_common_setsockopt+0xb0/0xcc net/core/sock.c:3448 __sys_setsockopt+0x2f8/0x4b0 net/socket.c:2203 __do_sys_setsockopt net/socket.c:2214 [inline] __se_sys_setsockopt net/socket.c:2211 [inline] __arm64_sys_setsockopt+0xb8/0xd4 net/socket.c:2211 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 xt_cgroup: invalid path, errno=-2