============================= [ BUG: Invalid wait context ] 6.12.0-rc5-next-20241030-syzkaller #0 Not tainted ----------------------------- udevd/5850 is trying to lock: ffffffff8eac8698 (kernfs_rename_lock){....}-{3:3}, at: kernfs_path_from_node+0x92/0xb00 fs/kernfs/dir.c:229 other info that might help us debug this: context-{5:5} 3 locks held by udevd/5850: #0: ffff8880b873e7d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598 #1: ffffffff8e939f20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #1: ffffffff8e939f20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #1: ffffffff8e939f20 (rcu_read_lock){....}-{1:3}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2339 [inline] #1: ffffffff8e939f20 (rcu_read_lock){....}-{1:3}, at: bpf_trace_run2+0x1fc/0x540 kernel/trace/bpf_trace.c:2381 #2: ffff88803108d1e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_trylock include/linux/mmap_lock.h:208 [inline] #2: ffff88803108d1e0 (&mm->mmap_lock){++++}-{4:4}, at: stack_map_get_build_id_offset+0x431/0x870 kernel/bpf/stackmap.c:157 stack backtrace: CPU: 1 UID: 0 PID: 5850 Comm: udevd Not tainted 6.12.0-rc5-next-20241030-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_lock_invalid_wait_context kernel/locking/lockdep.c:4826 [inline] check_wait_context kernel/locking/lockdep.c:4898 [inline] __lock_acquire+0x15a8/0x2100 kernel/locking/lockdep.c:5176 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xdd/0x130 kernel/locking/spinlock.c:236 kernfs_path_from_node+0x92/0xb00 fs/kernfs/dir.c:229 kernfs_path include/linux/kernfs.h:598 [inline] cgroup_path include/linux/cgroup.h:599 [inline] get_mm_memcg_path+0xb9/0x380 mm/mmap_lock.c:82 __mmap_lock_do_trace_acquire_returned+0x9f/0x2f0 mm/mmap_lock.c:102 __mmap_lock_trace_acquire_returned include/linux/mmap_lock.h:36 [inline] mmap_read_trylock include/linux/mmap_lock.h:209 [inline] stack_map_get_build_id_offset+0x84d/0x870 kernel/bpf/stackmap.c:157 __bpf_get_stack+0x8da/0xad0 kernel/bpf/stackmap.c:483 ____bpf_get_stack kernel/bpf/stackmap.c:499 [inline] bpf_get_stack+0x33/0x50 kernel/bpf/stackmap.c:496 ____bpf_get_stack_raw_tp kernel/trace/bpf_trace.c:1933 [inline] bpf_get_stack_raw_tp+0x1a3/0x240 kernel/trace/bpf_trace.c:1923 bpf_prog_ec3b2eefa702d8d3+0x43/0x47 bpf_dispatcher_nop_func include/linux/bpf.h:1290 [inline] __bpf_prog_run include/linux/filter.h:701 [inline] bpf_prog_run include/linux/filter.h:708 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2340 [inline] bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2381 trace_tlb_flush+0x118/0x140 include/trace/events/tlb.h:38 switch_mm_irqs_off+0x77a/0xa70 context_switch kernel/sched/core.c:5311 [inline] __schedule+0x10c7/0x4c30 kernel/sched/core.c:6707 __schedule_loop kernel/sched/core.c:6784 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6799 schedule_hrtimeout_range_clock+0x223/0x320 kernel/time/sleep_timeout.c:207 ep_poll fs/eventpoll.c:2067 [inline] do_epoll_wait+0x1d8e/0x2050 fs/eventpoll.c:2464 __do_sys_epoll_wait fs/eventpoll.c:2476 [inline] __se_sys_epoll_wait fs/eventpoll.c:2471 [inline] __x64_sys_epoll_wait+0x257/0x2a0 fs/eventpoll.c:2471 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa335923457 Code: Unable to access opcode bytes at 0x7fa33592342d. RSP: 002b:00007ffcac7404b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa335923457 RDX: 0000000000000004 RSI: 00007ffcac7404f8 RDI: 0000000000000004 RBP: 00005584ebe88a40 R08: 0000000000000007 R09: 71b9583089ce7afd R10: 00000000ffffffff R11: 0000000000000246 R12: 00005584ebe8eb20 R13: 00007ffcac7404f8 R14: 00000000ffffffff R15: 00005584ebe68910