BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1497 in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 3563, name: syz-executor409 1 lock held by syz-executor409/3563: #0: ffffffff8c945618 (css_set_lock){....}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:388 [inline] #0: ffffffff8c945618 (css_set_lock){....}-{2:2}, at: cgroup_get_from_path+0x24/0x2e0 kernel/cgroup/cgroup.c:6620 irq event stamp: 14736 hardirqs last enabled at (14735): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (14735): [] _raw_spin_unlock_irqrestore+0x8b/0x130 kernel/locking/spinlock.c:194 hardirqs last disabled at (14736): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline] hardirqs last disabled at (14736): [] _raw_spin_lock_irq+0xa9/0x110 kernel/locking/spinlock.c:170 softirqs last enabled at (14714): [] do_ipv6_setsockopt net/ipv6/ipv6_sockglue.c:985 [inline] softirqs last enabled at (14714): [] ipv6_setsockopt+0x2f1f/0x4380 net/ipv6/ipv6_sockglue.c:1009 softirqs last disabled at (14712): [] spin_lock_bh include/linux/spinlock.h:368 [inline] softirqs last disabled at (14712): [] release_sock+0x2c/0x1c0 net/core/sock.c:3263 Preemption disabled at: [<0000000000000000>] 0x0 CPU: 1 PID: 3563 Comm: syz-executor409 Not tainted 5.15.164-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 ___might_sleep+0x547/0x6a0 kernel/sched/core.c:9626 down_read+0x21/0x2e0 kernel/locking/rwsem.c:1497 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/ipv6/netfilter/ip6_tables.c:490 [inline] find_check_match net/ipv6/netfilter/ip6_tables.c:507 [inline] find_check_entry net/ipv6/netfilter/ip6_tables.c:558 [inline] translate_table+0x1669/0x2320 net/ipv6/netfilter/ip6_tables.c:735 do_replace net/ipv6/netfilter/ip6_tables.c:1156 [inline] do_ip6t_set_ctl+0xdcb/0x1220 net/ipv6/netfilter/ip6_tables.c:1646 nf_setsockopt+0x28a/0x2b0 net/netfilter/nf_sockopt.c:101 ipv6_setsockopt+0x2f9a/0x4380 net/ipv6/ipv6_sockglue.c:1014 __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+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fee501298e9 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:00007ffc300108d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007ffc30010aa8 RCX: 00007fee501298e9 RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 00007fee5019d610 R08: 0000000000001488 R09: 00007ffc30010aa8 R10: 00000000200028c0 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc30010a98 R14: 0000000000000001 R15: 0000000000000001 ============================= [ BUG: Invalid wait context ] 5.15.164-syzkaller #0 Tainted: G W ----------------------------- syz-executor409/3563 is trying to lock: ffffffff8ca523d0 (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-executor409/3563: #0: ffffffff8c945618 (css_set_lock){....}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:388 [inline] #0: ffffffff8c945618 (css_set_lock){....}-{2:2}, at: cgroup_get_from_path+0x24/0x2e0 kernel/cgroup/cgroup.c:6620 stack backtrace: CPU: 1 PID: 3563 Comm: syz-executor409 Tainted: G W 5.15.164-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 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:1498 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/ipv6/netfilter/ip6_tables.c:490 [inline] find_check_match net/ipv6/netfilter/ip6_tables.c:507 [inline] find_check_entry net/ipv6/netfilter/ip6_tables.c:558 [inline] translate_table+0x1669/0x2320 net/ipv6/netfilter/ip6_tables.c:735 do_replace net/ipv6/netfilter/ip6_tables.c:1156 [inline] do_ip6t_set_ctl+0xdcb/0x1220 net/ipv6/netfilter/ip6_tables.c:1646 nf_setsockopt+0x28a/0x2b0 net/netfilter/nf_sockopt.c:101 ipv6_setsockopt+0x2f9a/0x4380 net/ipv6/ipv6_sockglue.c:1014 __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+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fee501298e9 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:00007ffc300108d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007ffc30010aa8 RCX: 00007fee501298e9 RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 00007fee5019d610 R08: 0000000000001488 R09: 00007ffc30010aa8 R10: 00000000200028c0 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc30010a98 R14: 0000000000000001 R15: 0000000000000001