syzkaller login: [ 30.690214] BUG: Bad rss-counter state mm:00000000f6be5f3e type:MM_FILEPAGES val:33 [ 30.691898] BUG: Bad rss-counter state mm:00000000f6be5f3e type:MM_ANONPAGES val:22 [ 30.874054] ================================================================== [ 30.875079] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.876093] Read of size 8 at addr ffff88801a258d08 by task sshd/219 [ 30.877072] [ 30.877310] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.878244] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.879296] Call Trace: [ 30.879642] [ 30.879951] dump_stack_lvl+0x91/0xf0 [ 30.880490] print_report+0xcc/0x620 [ 30.881055] ? __virt_addr_valid+0x102/0x340 [ 30.881656] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.882321] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.882985] kasan_report+0xbe/0xf0 [ 30.883501] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.884171] vma_interval_tree_remove+0xc75/0xec0 [ 30.884885] vma_prepare+0xc54/0x11a0 [ 30.885431] __split_vma+0x5af/0x950 [ 30.885968] ? __pfx___split_vma+0x10/0x10 [ 30.886576] ? find_held_lock+0x2c/0x110 [ 30.887173] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.887814] ? lock_is_held_type+0x9f/0x120 [ 30.888426] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.889143] ? mtree_range_walk+0x632/0x900 [ 30.889764] ? mas_walk+0x5c7/0x7c0 [ 30.890311] do_vmi_munmap+0x1f1/0x2b0 [ 30.890870] mmap_region+0x1f9/0x2660 [ 30.891417] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.891994] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.892845] ? __pfx_lock_acquire+0x10/0x10 [ 30.893456] ? __pfx_mmap_region+0x10/0x10 [ 30.894055] ? security_mmap_addr+0x7d/0xa0 [ 30.894662] ? get_unmapped_area+0x1f5/0x3f0 [ 30.895286] do_mmap+0x854/0xf00 [ 30.895785] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.896347] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.897022] ksys_mmap_pgoff+0x3af/0x500 [ 30.897598] do_syscall_64+0x3f/0x90 [ 30.898145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.898900] RIP: 0033:0x7ffb571fbd82 [ 30.899424] 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 [ 30.901894] RSP: 002b:00007ffda9a9fcc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.902930] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffb571fbd82 [ 30.903901] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffb56635000 [ 30.904913] RBP: 00007ffb56635000 R08: 0000000000000009 R09: 0000000000001000 [ 30.905893] R10: 0000000000000812 R11: 0000000000000206 R12: 00005598b8a79ec0 [ 30.906882] R13: 00007ffda9a9fce0 R14: 00007ffda9a9fd10 R15: 00007ffda9aa0070 [ 30.907869] [ 30.908205] [ 30.908454] Allocated by task 212: [ 30.908978] kasan_save_stack+0x22/0x50 [ 30.909562] kasan_set_track+0x25/0x30 [ 30.910134] __kasan_slab_alloc+0x59/0x70 [ 30.910747] kmem_cache_alloc+0x16b/0x370 [ 30.911340] vm_area_dup+0x20/0x160 [ 30.911868] __split_vma+0x170/0x950 [ 30.912425] split_vma+0xc6/0x110 [ 30.912971] mprotect_fixup+0x8d2/0xb30 [ 30.913572] do_mprotect_pkey+0x87e/0xd40 [ 30.914169] __x64_sys_mprotect+0x78/0xc0 [ 30.914774] do_syscall_64+0x3f/0x90 [ 30.915323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.916071] [ 30.916328] Freed by task 19: [ 30.916799] kasan_save_stack+0x22/0x50 [ 30.917402] kasan_set_track+0x25/0x30 [ 30.917981] kasan_save_free_info+0x2b/0x50 [ 30.918605] __kasan_slab_free+0x10a/0x190 [ 30.919202] kmem_cache_free+0x10d/0x4d0 [ 30.919756] rcu_core+0x8c8/0x2860 [ 30.920282] __do_softirq+0x1b7/0x7d4 [ 30.920872] [ 30.921136] Last potentially related work creation: [ 30.921826] kasan_save_stack+0x22/0x50 [ 30.922420] __kasan_record_aux_stack+0x8e/0xa0 [ 30.923090] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.923843] remove_vma+0x139/0x170 [ 30.924384] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.925078] do_vmi_munmap+0x1f1/0x2b0 [ 30.925654] __vm_munmap+0x138/0x3a0 [ 30.926184] __x64_sys_munmap+0x59/0x80 [ 30.926751] do_syscall_64+0x3f/0x90 [ 30.927303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.928045] [ 30.928294] The buggy address belongs to the object at ffff88801a258cb0 [ 30.928294] which belongs to the cache vm_area_struct of size 168 [ 30.930113] The buggy address is located 88 bytes inside of [ 30.930113] freed 168-byte region [ffff88801a258cb0, ffff88801a258d58) [ 30.931811] [ 30.932067] The buggy address belongs to the physical page: [ 30.932893] page:00000000e520fd48 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a258 [ 30.934222] memcg:ffff88800c619d01 [ 30.934737] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.935529] page_type: 0xffffffff() [ 30.936081] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.937232] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c619d01 [ 30.938353] page dumped because: kasan: bad access detected [ 30.939152] [ 30.939412] Memory state around the buggy address: [ 30.940115] ffff88801a258c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.941175] ffff88801a258c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.942204] >ffff88801a258d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.943244] ^ [ 30.943782] ffff88801a258d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.944854] ffff88801a258e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.945915] ================================================================== [ 30.947248] Disabling lock debugging due to kernel taint [ 32.309706] BUG: Bad rss-counter state mm:000000009915761b type:MM_FILEPAGES val:33 [ 32.310894] BUG: Bad rss-counter state mm:000000009915761b type:MM_ANONPAGES val:22 [ 32.794178] BUG: Bad rss-counter state mm:0000000051f6beef type:MM_FILEPAGES val:33 [ 32.795299] BUG: Bad rss-counter state mm:0000000051f6beef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36314' (ECDSA) to the list of known hosts. 2023/06/20 16:33:28 fuzzer started 2023/06/20 16:33:28 dialing manager at localhost:36067 2023/06/20 16:33:28 checking machine... 2023/06/20 16:33:28 checking revisions... [ 33.565333] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:33:28 testing simple program... [ 33.619755] cgroup: Unknown subsys name 'net' [ 33.676332] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:33:28 Registers: info registers vcpu 0 RAX=1ffffffff0bbe769 RBX=ffffffff85df3b48 RCX=ffffffff81741110 RDX=0000000000000000 RSI=ffffffff86129742 RDI=ffffffff85df3b40 RBP=ffffffff85df3b48 RSP=ffff88800f5aef98 R8 =ffffffff86129742 R9 =ffff88800f5af090 R10=0000000000038001 R11=000000000001e45f R12=ffffffff85df3b48 R13=ffffffff85df3b40 R14=ffffffff85df3b44 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007fb8b50c6900 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=00007fb8b50a5020 CR3=000000000fa52000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 0000000000000000 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=00007f954a358988 CR3=0000000016632000 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=2037323a33333a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a33333a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000