syzkaller login: [ 30.983752] BUG: Bad rss-counter state mm:00000000d461c50a type:MM_FILEPAGES val:33 [ 30.984942] BUG: Bad rss-counter state mm:00000000d461c50a type:MM_ANONPAGES val:22 [ 31.140428] ================================================================== [ 31.141775] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.143199] Read of size 8 at addr ffff88800df12c20 by task sshd/221 [ 31.144114] [ 31.144387] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.145396] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.146606] Call Trace: [ 31.146999] [ 31.147388] dump_stack_lvl+0x91/0xf0 [ 31.148006] print_report+0xcc/0x620 [ 31.148609] ? __virt_addr_valid+0x102/0x340 [ 31.149265] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.150009] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.150750] kasan_report+0xbe/0xf0 [ 31.151331] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.152102] vma_interval_tree_remove+0xc75/0xec0 [ 31.152832] vma_prepare+0xc54/0x11a0 [ 31.153413] __split_vma+0x5af/0x950 [ 31.153987] ? __pfx___split_vma+0x10/0x10 [ 31.154631] ? find_held_lock+0x2c/0x110 [ 31.155311] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.155992] ? lock_is_held_type+0x9f/0x120 [ 31.156719] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.157454] ? mtree_range_walk+0x632/0x900 [ 31.158123] ? mas_walk+0x5c7/0x7c0 [ 31.158699] do_vmi_munmap+0x1f1/0x2b0 [ 31.159346] mmap_region+0x1f9/0x2660 [ 31.159929] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.160620] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.161653] ? __pfx_lock_acquire+0x10/0x10 [ 31.162300] ? __pfx_mmap_region+0x10/0x10 [ 31.162938] ? security_mmap_addr+0x7d/0xa0 [ 31.163624] ? get_unmapped_area+0x1f5/0x3f0 [ 31.164341] do_mmap+0x854/0xf00 [ 31.164883] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.165477] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.166166] ksys_mmap_pgoff+0x3af/0x500 [ 31.166788] do_syscall_64+0x3f/0x90 [ 31.167390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.168187] RIP: 0033:0x7f3430beed82 [ 31.168737] 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 [ 31.171350] RSP: 002b:00007fff6266dca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.172508] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3430beed82 [ 31.173529] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3430028000 [ 31.174584] RBP: 00007f3430028000 R08: 0000000000000009 R09: 0000000000001000 [ 31.175653] R10: 0000000000000812 R11: 0000000000000206 R12: 000056243693af70 [ 31.176695] R13: 00007fff6266dcc0 R14: 00007fff6266dcf0 R15: 00007fff6266e050 [ 31.177727] [ 31.178082] [ 31.178341] Allocated by task 214: [ 31.178856] kasan_save_stack+0x22/0x50 [ 31.179461] kasan_set_track+0x25/0x30 [ 31.180056] __kasan_slab_alloc+0x59/0x70 [ 31.180720] kmem_cache_alloc+0x16b/0x370 [ 31.181352] vm_area_dup+0x20/0x160 [ 31.181899] __split_vma+0x170/0x950 [ 31.182459] split_vma+0xc6/0x110 [ 31.183053] mprotect_fixup+0x8d2/0xb30 [ 31.183673] do_mprotect_pkey+0x87e/0xd40 [ 31.184306] __x64_sys_mprotect+0x78/0xc0 [ 31.184932] do_syscall_64+0x3f/0x90 [ 31.185498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.186262] [ 31.186516] Freed by task 214: [ 31.186983] kasan_save_stack+0x22/0x50 [ 31.187580] kasan_set_track+0x25/0x30 [ 31.188171] kasan_save_free_info+0x2b/0x50 [ 31.188802] __kasan_slab_free+0x10a/0x190 [ 31.189436] kmem_cache_free+0x10d/0x4d0 [ 31.190047] rcu_core+0x8c8/0x2860 [ 31.190576] __do_softirq+0x1b7/0x7d4 [ 31.191149] [ 31.191407] Last potentially related work creation: [ 31.192114] kasan_save_stack+0x22/0x50 [ 31.192716] __kasan_record_aux_stack+0x8e/0xa0 [ 31.193400] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.194164] remove_vma+0x139/0x170 [ 31.194704] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.195360] do_vmi_munmap+0x1f1/0x2b0 [ 31.195931] __vm_munmap+0x138/0x3a0 [ 31.196484] __x64_sys_munmap+0x59/0x80 [ 31.197066] do_syscall_64+0x3f/0x90 [ 31.197632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.198381] [ 31.198619] Second to last potentially related work creation: [ 31.199404] kasan_save_stack+0x22/0x50 [ 31.199988] __kasan_record_aux_stack+0x8e/0xa0 [ 31.200691] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.201446] remove_vma+0x139/0x170 [ 31.201984] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.202638] do_vmi_munmap+0x1f1/0x2b0 [ 31.203223] mmap_region+0x1f9/0x2660 [ 31.203794] do_mmap+0x854/0xf00 [ 31.204311] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.204895] ksys_mmap_pgoff+0x3af/0x500 [ 31.205486] do_syscall_64+0x3f/0x90 [ 31.206042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.206796] [ 31.207055] The buggy address belongs to the object at ffff88800df12bc8 [ 31.207055] which belongs to the cache vm_area_struct of size 168 [ 31.208820] The buggy address is located 88 bytes inside of [ 31.208820] freed 168-byte region [ffff88800df12bc8, ffff88800df12c70) [ 31.210482] [ 31.210732] The buggy address belongs to the physical page: [ 31.211494] page:00000000238892ae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf12 [ 31.212763] memcg:ffff88800dbb9701 [ 31.213266] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.214087] page_type: 0xffffffff() [ 31.214618] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bfb00 dead000000000005 [ 31.215667] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbb9701 [ 31.216676] page dumped because: kasan: bad access detected [ 31.217416] [ 31.217659] Memory state around the buggy address: [ 31.218306] ffff88800df12b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.219267] ffff88800df12b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.220248] >ffff88800df12c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.221197] ^ [ 31.221801] ffff88800df12c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.222764] ffff88800df12d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.223713] ================================================================== [ 31.224939] Disabling lock debugging due to kernel taint [ 33.104051] BUG: Bad rss-counter state mm:0000000056dc4e00 type:MM_FILEPAGES val:33 [ 33.105577] BUG: Bad rss-counter state mm:0000000056dc4e00 type:MM_ANONPAGES val:22 [ 33.597933] BUG: Bad rss-counter state mm:000000000587f1eb type:MM_FILEPAGES val:33 [ 33.599171] BUG: Bad rss-counter state mm:000000000587f1eb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52667' (ECDSA) to the list of known hosts. 2023/06/20 13:43:00 fuzzer started 2023/06/20 13:43:00 dialing manager at localhost:36067 2023/06/20 13:43:00 checking machine... 2023/06/20 13:43:00 checking revisions... [ 34.345395] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:43:00 testing simple program... [ 34.398272] cgroup: Unknown subsys name 'net' [ 34.439247] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:43:00 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f47ae5f3b60 CR3=000000000ed3c000 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=2039353a32343a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a32343a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801717fe70 RCX=0000000000000000 RDX=1ffff11002e2ffd5 RSI=ffffffff8449df70 RDI=ffff88801717feaa RBP=0000000000000001 RSP=ffff88801717f788 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000001 R13=0000000000002800 R14=0000000000000001 R15=0000000000000002 RIP=ffffffff8449df89 RFL=00000212 [----A--] 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 00007f35f1409900 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=00007f35f13d8008 CR3=000000001657c000 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