syzkaller login: [ 43.917927] BUG: Bad rss-counter state mm:0000000015de73f8 type:MM_FILEPAGES val:33 [ 43.919095] BUG: Bad rss-counter state mm:0000000015de73f8 type:MM_ANONPAGES val:22 [ 44.070154] ================================================================== [ 44.071240] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.072342] Read of size 8 at addr ffff8880158aa5c8 by task sshd/220 [ 44.073440] [ 44.073702] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.074709] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.075869] Call Trace: [ 44.076245] [ 44.076609] dump_stack_lvl+0x91/0xf0 [ 44.077185] print_report+0xcc/0x620 [ 44.077678] ? __virt_addr_valid+0x102/0x340 [ 44.078230] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.078843] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.079460] kasan_report+0xbe/0xf0 [ 44.079934] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.080557] vma_interval_tree_remove+0xc75/0xec0 [ 44.081151] vma_prepare+0xc54/0x11a0 [ 44.081628] __split_vma+0x5af/0x950 [ 44.082100] ? __pfx___split_vma+0x10/0x10 [ 44.082623] ? find_held_lock+0x2c/0x110 [ 44.083142] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.083704] ? lock_is_held_type+0x9f/0x120 [ 44.084240] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.084921] ? mtree_range_walk+0x632/0x900 [ 44.085477] ? mas_walk+0x5c7/0x7c0 [ 44.085957] do_vmi_munmap+0x1f1/0x2b0 [ 44.086447] mmap_region+0x1f9/0x2660 [ 44.086924] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.087431] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.088143] ? __pfx_lock_acquire+0x10/0x10 [ 44.088673] ? __pfx_mmap_region+0x10/0x10 [ 44.089196] ? security_mmap_addr+0x7d/0xa0 [ 44.089730] ? get_unmapped_area+0x1f5/0x3f0 [ 44.090278] do_mmap+0x854/0xf00 [ 44.090713] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.091205] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.091762] ksys_mmap_pgoff+0x3af/0x500 [ 44.092273] do_syscall_64+0x3f/0x90 [ 44.092759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.093407] RIP: 0033:0x7f52ab010d82 [ 44.093863] 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 [ 44.095985] RSP: 002b:00007ffcbbb25288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.096907] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f52ab010d82 [ 44.097757] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f52aa44a000 [ 44.098604] RBP: 00007f52aa44a000 R08: 0000000000000009 R09: 0000000000001000 [ 44.099453] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e874597ec0 [ 44.100299] R13: 00007ffcbbb252a0 R14: 00007ffcbbb252d0 R15: 00007ffcbbb25630 [ 44.101157] [ 44.101448] [ 44.101662] Allocated by task 213: [ 44.102096] kasan_save_stack+0x22/0x50 [ 44.102614] kasan_set_track+0x25/0x30 [ 44.103109] __kasan_slab_alloc+0x59/0x70 [ 44.103635] kmem_cache_alloc+0x16b/0x370 [ 44.104153] vm_area_dup+0x20/0x160 [ 44.104613] __split_vma+0x170/0x950 [ 44.105083] split_vma+0xc6/0x110 [ 44.105524] mprotect_fixup+0x8d2/0xb30 [ 44.106027] do_mprotect_pkey+0x87e/0xd40 [ 44.106555] __x64_sys_mprotect+0x78/0xc0 [ 44.107081] do_syscall_64+0x3f/0x90 [ 44.107553] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.108202] [ 44.108435] Freed by task 213: [ 44.108837] kasan_save_stack+0x22/0x50 [ 44.109349] kasan_set_track+0x25/0x30 [ 44.109856] kasan_save_free_info+0x2b/0x50 [ 44.110391] __kasan_slab_free+0x10a/0x190 [ 44.110922] kmem_cache_free+0x10d/0x4d0 [ 44.111431] rcu_core+0x8c8/0x2860 [ 44.111873] __do_softirq+0x1b7/0x7d4 [ 44.112346] [ 44.112572] Last potentially related work creation: [ 44.113153] kasan_save_stack+0x22/0x50 [ 44.113664] __kasan_record_aux_stack+0x8e/0xa0 [ 44.114294] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.114943] remove_vma+0x139/0x170 [ 44.115393] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.115945] do_vmi_munmap+0x1f1/0x2b0 [ 44.116444] __vm_munmap+0x138/0x3a0 [ 44.116910] __x64_sys_munmap+0x59/0x80 [ 44.117409] do_syscall_64+0x3f/0x90 [ 44.117879] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.118525] [ 44.118743] The buggy address belongs to the object at ffff8880158aa570 [ 44.118743] which belongs to the cache vm_area_struct of size 168 [ 44.120214] The buggy address is located 88 bytes inside of [ 44.120214] freed 168-byte region [ffff8880158aa570, ffff8880158aa618) [ 44.121618] [ 44.121834] The buggy address belongs to the physical page: [ 44.122498] page:0000000095f6478a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x158aa [ 44.123584] memcg:ffff88800cf16701 [ 44.124011] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.124675] page_type: 0xffffffff() [ 44.125129] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.126042] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cf16701 [ 44.126944] page dumped because: kasan: bad access detected [ 44.127607] [ 44.127824] Memory state around the buggy address: [ 44.128425] ffff8880158aa480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.129277] ffff8880158aa500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 44.130129] >ffff8880158aa580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.130988] ^ [ 44.131660] ffff8880158aa600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 44.132519] ffff8880158aa680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.133372] ================================================================== [ 44.134291] Disabling lock debugging due to kernel taint [ 46.247875] BUG: Bad rss-counter state mm:00000000a1abca4d type:MM_FILEPAGES val:33 [ 46.249712] BUG: Bad rss-counter state mm:00000000a1abca4d type:MM_ANONPAGES val:22 [ 46.814465] BUG: Bad rss-counter state mm:0000000046af4dc4 type:MM_FILEPAGES val:33 [ 46.815463] BUG: Bad rss-counter state mm:0000000046af4dc4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45690' (ECDSA) to the list of known hosts. 2023/06/20 05:46:14 fuzzer started 2023/06/20 05:46:14 dialing manager at localhost:44161 2023/06/20 05:46:14 checking machine... 2023/06/20 05:46:14 checking revisions... [ 47.398543] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:46:15 testing simple program... [ 47.442514] cgroup: Unknown subsys name 'net' [ 47.480212] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:45:59 Registers: info registers vcpu 0 RAX=000000000000002c RBX=000055bce985eb58 RCX=0000000000000020 RDX=0000000000000001 RSI=000055bce98770a0 RDI=000055bce985eb59 RBP=0000000000000000 RSP=00007ffdac0bd878 R8 =000055bce985eb20 R9 =0078696e755f6d61 R10=000055bce985eb20 R11=0000000000000297 R12=0000000000000008 R13=000055bce985e350 R14=0000000000000069 R15=000055bce9881e30 RIP=00007f9a6ba04ee4 RFL=00000283 [--S---C] 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 00007f9a6b4af900 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=00007f9a6ba670b0 CR3=0000000016296000 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=00000000000000000000000000000000 XMM01=ffffffffff0000ff0000000000000000 XMM02=0000006f732e7374696d696c5f6d6170 XMM03=00007f9a006f73006c69616d5f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11001ab3e92 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff88800d59f478 R8 =0000000000000001 R9 =0000000000000000 R10=ffffed1001877200 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856c1d40 R15=0000000000000000 RIP=ffffffff8180fd20 RFL=00000256 [---ZAP-] 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 00007fd2edd1d900 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=00007fd2ed16d2a0 CR3=000000000d770000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=a8d3d9fbe03bdc3300000000000ae988 XMM05=01226ca23477241e0000000000134708 XMM06=118457850d943c1d00000000001334a8 XMM07=fb795ef6d65770560000000000123a70 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000