------------[ cut here ]------------ WARNING: CPU: 1 PID: 13633 at kernel/rcu/tree_stall.h:921 rcu_check_gp_start_stall.part.0+0x325/0x4b0 kernel/rcu/tree_stall.h:913 Modules linked in: CPU: 1 PID: 13633 Comm: syz-executor.3 Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rcu_check_gp_start_stall.part.0+0x325/0x4b0 kernel/rcu/tree_stall.h:921 Code: 0f 88 fa 00 00 00 be 04 00 00 00 48 c7 c7 e0 36 25 90 e8 be 71 5b 00 b8 01 00 00 00 87 05 13 3f c3 0e 85 c0 0f 85 c9 00 00 00 <0f> 0b 48 81 fd c0 86 98 8b 48 c7 c3 ac e8 6e 8d 74 58 48 b8 00 00 RSP: 0018:ffffc90000dc0e30 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000100032329 RCX: ffffffff8161f7c2 RDX: fffffbfff204a6dc RSI: 0000000000000004 RDI: ffffffff902536e0 RBP: ffffffff8b9886c0 R08: 0000000000000001 R09: 0000000000000003 R10: fffffbfff204a6dc R11: 1ffff110173a6526 R12: 1ffffffff16c1e30 R13: 0000000000000246 R14: ffff8880b9d32852 R15: 0000000000000001 FS: 00007fa2c9966700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4b47722718 CR3: 000000009ec20000 CR4: 00000000001506e0 DR0: 0000000020000400 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: rcu_check_gp_start_stall kernel/rcu/tree_stall.h:884 [inline] rcu_core+0x4df/0x1470 kernel/rcu/tree.c:2738 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:rb_set_parent_color include/linux/rbtree_augmented.h:165 [inline] RIP: 0010:__rb_insert lib/rbtree.c:188 [inline] RIP: 0010:rb_insert_color+0x556/0x7a0 lib/rbtree.c:436 Code: 3c 02 00 0f 85 f4 01 00 00 49 c7 04 24 01 00 00 00 48 83 c4 08 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 89 e8 48 83 c8 01 49 89 06 <48> 89 03 48 89 e8 48 c1 e8 03 42 80 3c 28 00 74 9b 48 89 ef 48 89 RSP: 0018:ffffc9000193f5a0 EFLAGS: 00000286 RAX: ffff88801845ec11 RBX: ffff888098c69790 RCX: ffffc90003311000 RDX: 1ffff110039e52f2 RSI: ffffffff90264120 RDI: ffff88801845ec20 RBP: ffff88801845ec10 R08: ffffc900010b8000 R09: 0000000000000003 R10: ffffffff81b1a5d4 R11: 0000000000000000 R12: ffff888098c69550 R13: dffffc0000000000 R14: ffff888098d12610 R15: ffffc900010b8000 link_va mm/vmalloc.c:938 [inline] merge_or_add_vmap_area mm/vmalloc.c:1140 [inline] free_vmap_area_noflush+0x667/0xd10 mm/vmalloc.c:1747 free_unmap_vmap_area mm/vmalloc.c:1766 [inline] remove_vm_area+0x1cc/0x230 mm/vmalloc.c:2505 vm_remove_mappings mm/vmalloc.c:2534 [inline] __vunmap+0x392/0xb70 mm/vmalloc.c:2599 __vfree+0x3c/0xd0 mm/vmalloc.c:2657 vfree+0x5a/0x90 mm/vmalloc.c:2688 bpf_prog_calc_tag+0x4fe/0x740 kernel/bpf/core.c:334 resolve_pseudo_ldimm64 kernel/bpf/verifier.c:11493 [inline] bpf_check+0x1c87/0xbd20 kernel/bpf/verifier.c:13767 bpf_prog_load+0xe57/0x21f0 kernel/bpf/syscall.c:2301 __sys_bpf+0x67e/0x5df0 kernel/bpf/syscall.c:4587 __do_sys_bpf kernel/bpf/syscall.c:4691 [inline] __se_sys_bpf kernel/bpf/syscall.c:4689 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4689 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665f9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa2c9966188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9 RDX: 0000000000000048 RSI: 0000000020000500 RDI: 0000000000000005 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe542f692f R14: 00007fa2c9966300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 3c 02 cmp $0x2,%al 2: 00 0f add %cl,(%rdi) 4: 85 f4 test %esi,%esp 6: 01 00 add %eax,(%rax) 8: 00 49 c7 add %cl,-0x39(%rcx) b: 04 24 add $0x24,%al d: 01 00 add %eax,(%rax) f: 00 00 add %al,(%rax) 11: 48 83 c4 08 add $0x8,%rsp 15: 5b pop %rbx 16: 5d pop %rbp 17: 41 5c pop %r12 19: 41 5d pop %r13 1b: 41 5e pop %r14 1d: 41 5f pop %r15 1f: c3 retq 20: 48 89 e8 mov %rbp,%rax 23: 48 83 c8 01 or $0x1,%rax 27: 49 89 06 mov %rax,(%r14) * 2a: 48 89 03 mov %rax,(%rbx) <-- trapping instruction 2d: 48 89 e8 mov %rbp,%rax 30: 48 c1 e8 03 shr $0x3,%rax 34: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) 39: 74 9b je 0xffffffd6 3b: 48 89 ef mov %rbp,%rdi 3e: 48 rex.W 3f: 89 .byte 0x89