============================= [ BUG: Invalid wait context ] 6.13.0-rc7-syzkaller-00019-gc45323b7560e #0 Not tainted ----------------------------- syz.2.899/9036 is trying to lock: ffffffff8eabdbb8 (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} 5 locks held by syz.2.899/9036: #0: ffffffff8e9ec890 (dup_mmap_sem){++++}-{0:0}, at: dup_mm kernel/fork.c:1690 [inline] #0: ffffffff8e9ec890 (dup_mmap_sem){++++}-{0:0}, at: copy_mm+0x1d8/0x1fd0 kernel/fork.c:1743 #1: ffff8880307a4620 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:122 [inline] #1: ffff8880307a4620 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap kernel/fork.c:642 [inline] #1: ffff8880307a4620 (&mm->mmap_lock){++++}-{4:4}, at: dup_mm kernel/fork.c:1691 [inline] #1: ffff8880307a4620 (&mm->mmap_lock){++++}-{4:4}, at: copy_mm+0x2a4/0x1fd0 kernel/fork.c:1743 #2: ffff8880307a01e0 (&mm->mmap_lock/1){+.+.}-{4:4}, at: mmap_write_lock_nested include/linux/mmap_lock.h:113 [inline] #2: ffff8880307a01e0 (&mm->mmap_lock/1){+.+.}-{4:4}, at: dup_mmap kernel/fork.c:649 [inline] #2: ffff8880307a01e0 (&mm->mmap_lock/1){+.+.}-{4:4}, at: dup_mm kernel/fork.c:1691 [inline] #2: ffff8880307a01e0 (&mm->mmap_lock/1){+.+.}-{4:4}, at: copy_mm+0x38d/0x1fd0 kernel/fork.c:1743 #3: ffff8880b863e8d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598 #4: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #4: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #4: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2361 [inline] #4: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: bpf_trace_run2+0x1fc/0x540 kernel/trace/bpf_trace.c:2403 stack backtrace: CPU: 0 UID: 0 PID: 9036 Comm: syz.2.899 Not tainted 6.13.0-rc7-syzkaller-00019-gc45323b7560e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 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+0x95/0x350 mm/mmap_lock.c:59 __mmap_lock_do_trace_acquire_returned+0xfc/0x300 mm/mmap_lock.c:79 __mmap_lock_trace_acquire_returned include/linux/mmap_lock.h:36 [inline] mmap_read_trylock include/linux/mmap_lock.h:164 [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:1944 [inline] bpf_get_stack_raw_tp+0x1a3/0x240 kernel/trace/bpf_trace.c:1934 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:2362 [inline] bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2403 trace_tlb_flush+0x11c/0x140 include/trace/events/tlb.h:38 switch_mm_irqs_off+0x77a/0xa70 context_switch kernel/sched/core.c:5353 [inline] __schedule+0x10c8/0x4c30 kernel/sched/core.c:6756 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7078 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:obj_cgroup_put include/linux/memcontrol.h:779 [inline] RIP: 0010:mod_objcg_state+0x5d9/0x930 mm/memcontrol.c:2766 Code: 3c 23 00 74 08 4c 89 f7 e8 d4 dc f7 ff f6 84 24 81 00 00 00 02 0f 85 89 00 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 8b 7c 24 28 <48> 85 ff 74 05 e8 fd 86 00 00 48 c7 44 24 60 0e 36 e0 45 48 8b 44 RSP: 0018:ffffc900031675a0 EFLAGS: 00000206 RAX: 790a5b7b00afaa00 RBX: 1ffff9200062cec4 RCX: ffffffff817b387a RDX: dffffc0000000000 RSI: ffffffff8c0a98e0 RDI: 0000000000000000 RBP: ffffc900031676b8 R08: ffffffff942a593f R09: 1ffffffff2854b27 R10: dffffc0000000000 R11: fffffbfff2854b28 R12: dffffc0000000000 R13: 0000000000000058 R14: ffffc90003167620 R15: 0000000000000246 __memcg_slab_post_alloc_hook+0x20f/0x7e0 mm/memcontrol.c:3013 memcg_slab_post_alloc_hook mm/slub.c:2152 [inline] slab_post_alloc_hook mm/slub.c:4129 [inline] slab_alloc_node mm/slub.c:4168 [inline] kmem_cache_alloc_noprof+0x287/0x380 mm/slub.c:4175 anon_vma_chain_alloc mm/rmap.c:142 [inline] anon_vma_clone+0x98/0x4e0 mm/rmap.c:288 anon_vma_fork+0x87/0x580 mm/rmap.c:351 dup_mmap kernel/fork.c:711 [inline] dup_mm kernel/fork.c:1691 [inline] copy_mm+0xc72/0x1fd0 kernel/fork.c:1743 copy_process+0x1845/0x3d50 kernel/fork.c:2394 kernel_clone+0x226/0x8e0 kernel/fork.c:2806 __do_sys_clone kernel/fork.c:2949 [inline] __se_sys_clone kernel/fork.c:2933 [inline] __x64_sys_clone+0x258/0x2a0 kernel/fork.c:2933 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: 0033:0x7fef6798cda9 Code: Unable to access opcode bytes at 0x7fef6798cd7f. RSP: 002b:00007fef687e4fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fef67ba5fa0 RCX: 00007fef6798cda9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000008010e000 RBP: 00007fef67a0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fef67ba5fa0 R15: 00007ffe2513e988 ---------------- Code disassembly (best guess): 0: 3c 23 cmp $0x23,%al 2: 00 74 08 4c add %dh,0x4c(%rax,%rcx,1) 6: 89 f7 mov %esi,%edi 8: e8 d4 dc f7 ff call 0xfff7dce1 d: f6 84 24 81 00 00 00 testb $0x2,0x81(%rsp) 14: 02 15: 0f 85 89 00 00 00 jne 0xa4 1b: 41 f7 c7 00 02 00 00 test $0x200,%r15d 22: 74 01 je 0x25 24: fb sti 25: 48 8b 7c 24 28 mov 0x28(%rsp),%rdi * 2a: 48 85 ff test %rdi,%rdi <-- trapping instruction 2d: 74 05 je 0x34 2f: e8 fd 86 00 00 call 0x8731 34: 48 c7 44 24 60 0e 36 movq $0x45e0360e,0x60(%rsp) 3b: e0 45 3d: 48 rex.W 3e: 8b .byte 0x8b 3f: 44 rex.R