syzkaller login: [ 62.342894] BUG: Bad rss-counter state mm:0000000034dcf366 type:MM_FILEPAGES val:33 [ 62.344765] BUG: Bad rss-counter state mm:0000000034dcf366 type:MM_ANONPAGES val:22 [ 62.506069] ================================================================== [ 62.506972] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.507926] Read of size 8 at addr ffff888009f8adf0 by task sshd/219 [ 62.508694] [ 62.508922] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 62.510044] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.511013] Call Trace: [ 62.511364] [ 62.511683] dump_stack_lvl+0x91/0xf0 [ 62.512174] print_report+0xcc/0x620 [ 62.512658] ? __virt_addr_valid+0x102/0x340 [ 62.513207] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.513835] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.514448] kasan_report+0xbe/0xf0 [ 62.514922] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.515555] vma_interval_tree_remove+0xc75/0xec0 [ 62.516156] vma_prepare+0xc54/0x11a0 [ 62.516633] __split_vma+0x5af/0x950 [ 62.517108] ? __pfx___split_vma+0x10/0x10 [ 62.517632] ? find_held_lock+0x2c/0x110 [ 62.518156] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.518716] ? lock_is_held_type+0x9f/0x120 [ 62.519252] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.519853] ? mtree_range_walk+0x632/0x900 [ 62.520397] ? mas_walk+0x5c7/0x7c0 [ 62.520868] do_vmi_munmap+0x1f1/0x2b0 [ 62.521353] mmap_region+0x1f9/0x2660 [ 62.521827] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.522341] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.523055] ? __pfx_lock_acquire+0x10/0x10 [ 62.523608] ? __pfx_mmap_region+0x10/0x10 [ 62.524138] ? security_mmap_addr+0x7d/0xa0 [ 62.524663] ? get_unmapped_area+0x1f5/0x3f0 [ 62.525203] do_mmap+0x854/0xf00 [ 62.525639] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.526132] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.526688] ksys_mmap_pgoff+0x3af/0x500 [ 62.527190] do_syscall_64+0x3f/0x90 [ 62.527676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.528316] RIP: 0033:0x7f94e02ded82 [ 62.528768] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 62.530876] RSP: 002b:00007ffec0bef7c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.531776] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f94e02ded82 [ 62.532614] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f94df718000 [ 62.533453] RBP: 00007f94df718000 R08: 0000000000000009 R09: 0000000000001000 [ 62.534284] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f4950aec0 [ 62.535115] R13: 00007ffec0bef7e0 R14: 00007ffec0bef810 R15: 00007ffec0befb70 [ 62.536000] [ 62.536291] [ 62.536509] Allocated by task 212: [ 62.536938] kasan_save_stack+0x22/0x50 [ 62.537438] kasan_set_track+0x25/0x30 [ 62.537929] __kasan_slab_alloc+0x59/0x70 [ 62.538448] kmem_cache_alloc+0x16b/0x370 [ 62.538980] vm_area_dup+0x20/0x160 [ 62.539442] __split_vma+0x170/0x950 [ 62.539909] split_vma+0xc6/0x110 [ 62.540349] mprotect_fixup+0x8d2/0xb30 [ 62.540855] do_mprotect_pkey+0x87e/0xd40 [ 62.541372] __x64_sys_mprotect+0x78/0xc0 [ 62.541894] do_syscall_64+0x3f/0x90 [ 62.542363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.543005] [ 62.543237] Freed by task 212: [ 62.543636] kasan_save_stack+0x22/0x50 [ 62.544140] kasan_set_track+0x25/0x30 [ 62.544635] kasan_save_free_info+0x2b/0x50 [ 62.545165] __kasan_slab_free+0x10a/0x190 [ 62.545697] kmem_cache_free+0x10d/0x4d0 [ 62.546214] rcu_core+0x8c8/0x2860 [ 62.546668] __do_softirq+0x1b7/0x7d4 [ 62.547149] [ 62.547370] Last potentially related work creation: [ 62.547956] kasan_save_stack+0x22/0x50 [ 62.548482] __kasan_record_aux_stack+0x8e/0xa0 [ 62.549078] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.549747] remove_vma+0x139/0x170 [ 62.550214] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.550783] do_vmi_munmap+0x1f1/0x2b0 [ 62.551291] __vm_munmap+0x138/0x3a0 [ 62.551769] __x64_sys_munmap+0x59/0x80 [ 62.552282] do_syscall_64+0x3f/0x90 [ 62.552775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.553433] [ 62.553652] The buggy address belongs to the object at ffff888009f8ad98 [ 62.553652] which belongs to the cache vm_area_struct of size 168 [ 62.555178] The buggy address is located 88 bytes inside of [ 62.555178] freed 168-byte region [ffff888009f8ad98, ffff888009f8ae40) [ 62.556637] [ 62.556859] The buggy address belongs to the physical page: [ 62.557534] page:00000000d08e2db7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9f8a [ 62.558653] memcg:ffff88800edd8101 [ 62.559094] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.559766] page_type: 0xffffffff() [ 62.560228] raw: 0100000000000200 ffff88800879fc80 ffffea00003f4240 0000000000000004 [ 62.561167] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edd8101 [ 62.562101] page dumped because: kasan: bad access detected [ 62.562784] [ 62.563004] Memory state around the buggy address: [ 62.563612] ffff888009f8ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 62.564471] ffff888009f8ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 62.565324] >ffff888009f8ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 62.566177] ^ [ 62.566984] ffff888009f8ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 62.567849] ffff888009f8ae80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.568696] ================================================================== [ 62.569656] Disabling lock debugging due to kernel taint [ 65.279075] BUG: Bad rss-counter state mm:000000006ad3941c type:MM_FILEPAGES val:33 [ 65.280190] BUG: Bad rss-counter state mm:000000006ad3941c type:MM_ANONPAGES val:22 [ 65.830751] BUG: Bad rss-counter state mm:00000000b3f9c097 type:MM_FILEPAGES val:33 [ 65.831785] BUG: Bad rss-counter state mm:00000000b3f9c097 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59272' (ECDSA) to the list of known hosts. 2023/06/19 23:04:52 fuzzer started 2023/06/19 23:04:53 dialing manager at localhost:44161 2023/06/19 23:04:53 checking machine... 2023/06/19 23:04:53 checking revisions... [ 66.558319] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:04:53 testing simple program... [ 66.614070] cgroup: Unknown subsys name 'net' [ 66.667091] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:04:20 Registers: info registers vcpu 0 RAX=0000000000000024 RBX=0000000000000003 RCX=0000000000000000 RDX=000055fc124a6e00 RSI=000055fc124a6e00 RDI=000055fc124a6e30 RBP=000055fc124a6e30 RSP=00007fb06bffeae0 R8 =00007fb06bfff700 R9 =0000000000000000 R10=0000000000000003 R11=0000000000000286 R12=00007fb06c0080c0 R13=000055fc124a6e00 R14=000055fc124a68d8 R15=00007fb06bffeaf0 RIP=000055fc116e2f52 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb06bfff700 00000000 00000000 GS =0000 0000000000000000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fb3346a09b0 CR3=000000000d80c000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2032353a34303a3332203931206e754a XMM01=5f687373203a726f727265203a5d3633 XMM02=632079746972756365732078756e694c XMM03=742064656c696146203a656d616e7962 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a34303a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf35000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff1100d9e1329 RSP=ffff88806cf09928 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652a88 R15=ffff88801aa24730 RIP=ffffffff8135b932 RFL=00000282 [--S----] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f224a11d900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f224a0fc020 CR3=000000001bf28000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000