syzbot

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): [<ffffffff8152a0f1>] queue_delayed_work_on+0x171/0x250 kernel/workqueue.c:1719
hardirqs last disabled at (15108): [<ffffffff8a254459>] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline]
hardirqs last disabled at (15108): [<ffffffff8a254459>] _raw_spin_lock_irq+0xa9/0x110 kernel/locking/spinlock.c:170
softirqs last  enabled at (15090): [<ffffffff814d64f5>] invoke_softirq kernel/softirq.c:432 [inline]
softirqs last  enabled at (15090): [<ffffffff814d64f5>] __irq_exit_rcu+0x155/0x240 kernel/softirq.c:637
softirqs last disabled at (15075): [<ffffffff814d64f5>] invoke_softirq kernel/softirq.c:432 [inline]
softirqs last disabled at (15075): [<ffffffff814d64f5>] __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:
 <TASK>
 __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
 </TASK>

=============================
[ 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:
 <TASK>
 __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