syzkaller login: [ 36.656848] BUG: Bad rss-counter state mm:00000000edf855c3 type:MM_FILEPAGES val:33 [ 36.657614] BUG: Bad rss-counter state mm:00000000edf855c3 type:MM_ANONPAGES val:22 [ 36.819763] ================================================================== [ 36.820687] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.821643] Read of size 8 at addr ffff88800f0e8880 by task sshd/220 [ 36.822500] [ 36.822733] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.823603] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.824616] Call Trace: [ 36.824935] <TASK> [ 36.825227] dump_stack_lvl+0x91/0xf0 [ 36.825720] print_report+0xcc/0x620 [ 36.826235] ? __virt_addr_valid+0x102/0x340 [ 36.826794] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.827410] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.828025] kasan_report+0xbe/0xf0 [ 36.828505] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.829147] vma_interval_tree_remove+0xc75/0xec0 [ 36.829750] vma_prepare+0xc54/0x11a0 [ 36.830247] __split_vma+0x5af/0x950 [ 36.830720] ? __pfx___split_vma+0x10/0x10 [ 36.831254] ? find_held_lock+0x2c/0x110 [ 36.831773] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.832340] ? lock_is_held_type+0x9f/0x120 [ 36.832879] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.833496] ? mtree_range_walk+0x632/0x900 [ 36.834054] ? mas_walk+0x5c7/0x7c0 [ 36.834536] do_vmi_munmap+0x1f1/0x2b0 [ 36.835028] mmap_region+0x1f9/0x2660 [ 36.835508] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.836019] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.836733] ? __pfx_lock_acquire+0x10/0x10 [ 36.837268] ? __pfx_mmap_region+0x10/0x10 [ 36.837794] ? security_mmap_addr+0x7d/0xa0 [ 36.838351] ? get_unmapped_area+0x1f5/0x3f0 [ 36.838905] do_mmap+0x854/0xf00 [ 36.839344] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.839842] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.840402] ksys_mmap_pgoff+0x3af/0x500 [ 36.840907] do_syscall_64+0x3f/0x90 [ 36.841394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.842047] RIP: 0033:0x7fa57ad49d82 [ 36.842506] 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 [ 36.844658] RSP: 002b:00007ffdd79ad328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.845568] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa57ad49d82 [ 36.846432] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa57a183000 [ 36.847283] RBP: 00007fa57a183000 R08: 0000000000000009 R09: 0000000000001000 [ 36.848131] R10: 0000000000000812 R11: 0000000000000206 R12: 00005602bcb91b20 [ 36.848979] R13: 00007ffdd79ad340 R14: 00007ffdd79ad370 R15: 00007ffdd79ad6d0 [ 36.849859] </TASK> [ 36.850158] [ 36.850373] Allocated by task 213: [ 36.850799] kasan_save_stack+0x22/0x50 [ 36.851312] kasan_set_track+0x25/0x30 [ 36.851808] __kasan_slab_alloc+0x59/0x70 [ 36.852338] kmem_cache_alloc+0x16b/0x370 [ 36.852861] vm_area_dup+0x20/0x160 [ 36.853318] __split_vma+0x170/0x950 [ 36.853781] split_vma+0xc6/0x110 [ 36.854232] mprotect_fixup+0x8d2/0xb30 [ 36.854737] do_mprotect_pkey+0x87e/0xd40 [ 36.855257] __x64_sys_mprotect+0x78/0xc0 [ 36.855779] do_syscall_64+0x3f/0x90 [ 36.856259] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.856903] [ 36.857122] Freed by task 213: [ 36.857513] kasan_save_stack+0x22/0x50 [ 36.858029] kasan_set_track+0x25/0x30 [ 36.858528] kasan_save_free_info+0x2b/0x50 [ 36.859059] __kasan_slab_free+0x10a/0x190 [ 36.859593] kmem_cache_free+0x10d/0x4d0 [ 36.860104] rcu_core+0x8c8/0x2860 [ 36.860551] __do_softirq+0x1b7/0x7d4 [ 36.861034] [ 36.861252] Last potentially related work creation: [ 36.861851] kasan_save_stack+0x22/0x50 [ 36.862372] __kasan_record_aux_stack+0x8e/0xa0 [ 36.862964] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.863623] remove_vma+0x139/0x170 [ 36.864086] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.864660] do_vmi_munmap+0x1f1/0x2b0 [ 36.865148] __vm_munmap+0x138/0x3a0 [ 36.865617] __x64_sys_munmap+0x59/0x80 [ 36.866161] do_syscall_64+0x3f/0x90 [ 36.866647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.867307] [ 36.867523] The buggy address belongs to the object at ffff88800f0e8828 [ 36.867523] which belongs to the cache vm_area_struct of size 168 [ 36.868999] The buggy address is located 88 bytes inside of [ 36.868999] freed 168-byte region [ffff88800f0e8828, ffff88800f0e88d0) [ 36.870416] [ 36.870645] The buggy address belongs to the physical page: [ 36.871314] page:000000005f13f33f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0e8 [ 36.872407] memcg:ffff88800ebb1901 [ 36.872838] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.873496] page_type: 0xffffffff() [ 36.873957] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.874886] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebb1901 [ 36.875810] page dumped because: kasan: bad access detected [ 36.876477] [ 36.876692] Memory state around the buggy address: [ 36.877280] ffff88800f0e8780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 36.878142] ffff88800f0e8800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 36.879000] >ffff88800f0e8880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 36.879856] ^ [ 36.880274] ffff88800f0e8900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.881144] ffff88800f0e8980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 36.882012] ================================================================== [ 36.883118] Disabling lock debugging due to kernel taint [ 39.163777] BUG: Bad rss-counter state mm:000000008ae33627 type:MM_FILEPAGES val:33 [ 39.164802] BUG: Bad rss-counter state mm:000000008ae33627 type:MM_ANONPAGES val:22 [ 39.554795] BUG: Bad rss-counter state mm:00000000395e98e9 type:MM_FILEPAGES val:33 [ 39.556345] BUG: Bad rss-counter state mm:00000000395e98e9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44619' (ECDSA) to the list of known hosts. 2023/06/19 21:31:30 fuzzer started 2023/06/19 21:31:30 dialing manager at localhost:44161 2023/06/19 21:31:30 checking machine... 2023/06/19 21:31:30 checking revisions... [ 40.126876] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:31:30 testing simple program... [ 40.182591] cgroup: Unknown subsys name 'net' [ 40.252337] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:31:24 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff818c7603 RDX=0000000000008c76 RSI=0000000000008c76 RDI=ffffffff8650ad98 RBP=ffff8880147b74b8 RSP=ffff8880147b73f0 R8 =0000000000000000 R9 =ffff8880147b74a0 R10=0000000000038001 R11=0000000000024024 R12=ffff8880147b74c0 R13=ffff8880147b74a8 R14=ffff8880147b74a1 R15=ffff8880147b7460 RIP=ffffffff811307c2 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 00007f282669f900 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=00007fffdaec0698 CR3=000000000ca28000 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=7c8331f8019fd04d00000000000ae988 XMM05=1319e678c5640f8a0000000000134cb8 XMM06=94aac670ef06ff650000000000134c20 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff844bd8f2 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801cd7fa01 RSI=ffff88801cd7fa30 RDI=ffff88801cd7fa30 RBP=ffff88801cd7ef90 RSP=ffff88801cd7eec0 R8 =ffffffff864a9908 R9 =ffff88801cd7ef78 R10=0000000000038001 R11=00000000000b3e34 R12=ffff88801cd7ef98 R13=ffff88801cd7ef80 R14=ffff88801cd7fa38 R15=ffff88801cd7ef38 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007fe48416f900 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=00007fe484119008 CR3=000000001989e000 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