syzkaller login: [ 41.977990] BUG: Bad rss-counter state mm:0000000012b77e06 type:MM_FILEPAGES val:33 [ 41.979195] BUG: Bad rss-counter state mm:0000000012b77e06 type:MM_ANONPAGES val:22 [ 42.124131] ================================================================== [ 42.125166] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.126105] Read of size 8 at addr ffff88800cec9798 by task sshd/219 [ 42.127050] [ 42.127269] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.128155] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.129174] Call Trace: [ 42.129495] [ 42.129776] dump_stack_lvl+0x91/0xf0 [ 42.130289] print_report+0xcc/0x620 [ 42.130777] ? __virt_addr_valid+0x102/0x340 [ 42.131340] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.131957] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.132612] kasan_report+0xbe/0xf0 [ 42.133101] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.133719] vma_interval_tree_remove+0xc75/0xec0 [ 42.134340] vma_prepare+0xc54/0x11a0 [ 42.134821] __split_vma+0x5af/0x950 [ 42.135308] ? __pfx___split_vma+0x10/0x10 [ 42.135834] ? find_held_lock+0x2c/0x110 [ 42.136392] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.136970] ? lock_is_held_type+0x9f/0x120 [ 42.137513] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.138141] ? mtree_range_walk+0x632/0x900 [ 42.138693] ? mas_walk+0x5c7/0x7c0 [ 42.139183] do_vmi_munmap+0x1f1/0x2b0 [ 42.139674] mmap_region+0x1f9/0x2660 [ 42.140182] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.140705] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.141433] ? __pfx_lock_acquire+0x10/0x10 [ 42.141982] ? __pfx_mmap_region+0x10/0x10 [ 42.142514] ? security_mmap_addr+0x7d/0xa0 [ 42.143060] ? get_unmapped_area+0x1f5/0x3f0 [ 42.143605] do_mmap+0x854/0xf00 [ 42.144067] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.144584] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.145159] ksys_mmap_pgoff+0x3af/0x500 [ 42.145672] do_syscall_64+0x3f/0x90 [ 42.146179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.146842] RIP: 0033:0x7fa7d289ed82 [ 42.147319] 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 [ 42.149478] RSP: 002b:00007ffcdbc3a798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.150396] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa7d289ed82 [ 42.151259] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa7d1cd8000 [ 42.152141] RBP: 00007fa7d1cd8000 R08: 0000000000000009 R09: 0000000000001000 [ 42.153025] R10: 0000000000000812 R11: 0000000000000206 R12: 00005638365b9b20 [ 42.153880] R13: 00007ffcdbc3a7b0 R14: 00007ffcdbc3a7e0 R15: 00007ffcdbc3ab40 [ 42.154759] [ 42.155071] [ 42.155290] Allocated by task 212: [ 42.155718] kasan_save_stack+0x22/0x50 [ 42.156271] kasan_set_track+0x25/0x30 [ 42.156766] __kasan_slab_alloc+0x59/0x70 [ 42.157310] kmem_cache_alloc+0x16b/0x370 [ 42.157854] vm_area_dup+0x20/0x160 [ 42.158320] __split_vma+0x170/0x950 [ 42.158780] split_vma+0xc6/0x110 [ 42.159236] mprotect_fixup+0x8d2/0xb30 [ 42.159739] do_mprotect_pkey+0x87e/0xd40 [ 42.160299] __x64_sys_mprotect+0x78/0xc0 [ 42.160824] do_syscall_64+0x3f/0x90 [ 42.161311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.161955] [ 42.162177] Freed by task 212: [ 42.162570] kasan_save_stack+0x22/0x50 [ 42.163100] kasan_set_track+0x25/0x30 [ 42.163594] kasan_save_free_info+0x2b/0x50 [ 42.164145] __kasan_slab_free+0x10a/0x190 [ 42.164692] kmem_cache_free+0x10d/0x4d0 [ 42.165212] rcu_core+0x8c8/0x2860 [ 42.165679] __do_softirq+0x1b7/0x7d4 [ 42.166180] [ 42.166397] Last potentially related work creation: [ 42.167002] kasan_save_stack+0x22/0x50 [ 42.167503] __kasan_record_aux_stack+0x8e/0xa0 [ 42.168109] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.168774] remove_vma+0x139/0x170 [ 42.169235] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.169797] do_vmi_munmap+0x1f1/0x2b0 [ 42.170292] __vm_munmap+0x138/0x3a0 [ 42.170754] __x64_sys_munmap+0x59/0x80 [ 42.171268] do_syscall_64+0x3f/0x90 [ 42.171738] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.172411] [ 42.172626] Second to last potentially related work creation: [ 42.173351] kasan_save_stack+0x22/0x50 [ 42.173858] __kasan_record_aux_stack+0x8e/0xa0 [ 42.174446] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.175136] remove_vma+0x139/0x170 [ 42.175602] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.176186] do_vmi_munmap+0x1f1/0x2b0 [ 42.176686] mmap_region+0x1f9/0x2660 [ 42.177185] do_mmap+0x854/0xf00 [ 42.177617] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.178116] ksys_mmap_pgoff+0x3af/0x500 [ 42.178618] do_syscall_64+0x3f/0x90 [ 42.179107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.179743] [ 42.179967] The buggy address belongs to the object at ffff88800cec9740 [ 42.179967] which belongs to the cache vm_area_struct of size 168 [ 42.181493] The buggy address is located 88 bytes inside of [ 42.181493] freed 168-byte region [ffff88800cec9740, ffff88800cec97e8) [ 42.182908] [ 42.183137] The buggy address belongs to the physical page: [ 42.183794] page:0000000095f4c53f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcec9 [ 42.184905] memcg:ffff88800cb79a01 [ 42.185351] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 42.186075] page_type: 0xffffffff() [ 42.186526] raw: 0100000000000200 ffff88800879fc80 ffffea00003bcf40 dead000000000003 [ 42.187463] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb79a01 [ 42.188405] page dumped because: kasan: bad access detected [ 42.189096] [ 42.189311] Memory state around the buggy address: [ 42.189893] ffff88800cec9680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.190754] ffff88800cec9700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 42.191619] >ffff88800cec9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 42.192511] ^ [ 42.193021] ffff88800cec9800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 42.193866] ffff88800cec9880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 42.194729] ================================================================== [ 42.195875] Disabling lock debugging due to kernel taint [ 44.108992] BUG: Bad rss-counter state mm:00000000b76bea96 type:MM_FILEPAGES val:33 [ 44.109853] BUG: Bad rss-counter state mm:00000000b76bea96 type:MM_ANONPAGES val:22 [ 44.589841] BUG: Bad rss-counter state mm:000000001e75fea3 type:MM_FILEPAGES val:33 [ 44.591232] BUG: Bad rss-counter state mm:000000001e75fea3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1728' (ECDSA) to the list of known hosts. 2023/06/20 03:41:37 fuzzer started 2023/06/20 03:41:38 dialing manager at localhost:44161 2023/06/20 03:41:38 checking machine... 2023/06/20 03:41:38 checking revisions... [ 45.298675] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:41:38 testing simple program... [ 45.340468] cgroup: Unknown subsys name 'net' [ 45.386282] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:41:26 Registers: info registers vcpu 0 RAX=1ffff11001b1305f RBX=ffff88800d8982c8 RCX=1ffff110027a0bdc RDX=dffffc0000000000 RSI=ffff8880182b4300 RDI=ffff88800d8982f8 RBP=ffff888013d05eb0 RSP=ffff888014717cb8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff8880182b3300 R13=0000000000000000 R14=ffff888014693048 R15=ffff888014693000 RIP=ffffffff818474fe RFL=00000046 [---Z-P-] 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 00007fbd2ca9a900 00000000 00000000 GS =0000 ffff88806ce00000 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=00007fbd2be8a3e0 CR3=000000000d834000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c959ec98b19b651200000000000ae988 XMM05=73c67f7d3cace8710000000000135fc8 XMM06=806171799158d9670000000000134db8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888019cc1b40 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c83e7 RDI=ffff888019cc1f34 RBP=ffff888019cc1b40 RSP=ffff88801475f680 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=00007f932c3a0366 R13=0000000000000000 R14=ffff888019cc1b40 R15=0000000000082cc0 RIP=ffffffff8135bd88 RFL=00000246 [---Z-P-] 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 00007f932bead900 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=00007fff861b1000 CR3=0000000019d6e000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000