syzkaller login: [ 116.036682] BUG: Bad rss-counter state mm:0000000028601fa0 type:MM_FILEPAGES val:33 [ 116.038119] BUG: Bad rss-counter state mm:0000000028601fa0 type:MM_ANONPAGES val:22 [ 116.199044] ================================================================== [ 116.200044] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 116.201013] Read of size 8 at addr ffff8880186b6310 by task sshd/220 [ 116.201900] [ 116.202116] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 116.203145] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 116.204148] Call Trace: [ 116.204474] [ 116.204764] dump_stack_lvl+0x91/0xf0 [ 116.205259] print_report+0xcc/0x620 [ 116.205744] ? __virt_addr_valid+0x102/0x340 [ 116.206302] ? vma_interval_tree_remove+0xc75/0xec0 [ 116.206946] ? vma_interval_tree_remove+0xc75/0xec0 [ 116.207562] kasan_report+0xbe/0xf0 [ 116.208035] ? vma_interval_tree_remove+0xc75/0xec0 [ 116.208654] vma_interval_tree_remove+0xc75/0xec0 [ 116.209253] vma_prepare+0xc54/0x11a0 [ 116.209735] __split_vma+0x5af/0x950 [ 116.210208] ? __pfx___split_vma+0x10/0x10 [ 116.210734] ? find_held_lock+0x2c/0x110 [ 116.211265] do_vmi_align_munmap+0x2ba/0x11f0 [ 116.211832] ? lock_is_held_type+0x9f/0x120 [ 116.212363] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 116.212979] ? mtree_range_walk+0x632/0x900 [ 116.213560] ? mas_walk+0x5c7/0x7c0 [ 116.214054] do_vmi_munmap+0x1f1/0x2b0 [ 116.214562] mmap_region+0x1f9/0x2660 [ 116.215072] ? vm_mmap_pgoff+0x15c/0x3a0 [ 116.215604] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 116.216332] ? __pfx_lock_acquire+0x10/0x10 [ 116.216879] ? __pfx_mmap_region+0x10/0x10 [ 116.217427] ? security_mmap_addr+0x7d/0xa0 [ 116.217987] ? get_unmapped_area+0x1f5/0x3f0 [ 116.218555] do_mmap+0x854/0xf00 [ 116.219043] vm_mmap_pgoff+0x1a6/0x3a0 [ 116.219556] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 116.220134] ksys_mmap_pgoff+0x3af/0x500 [ 116.220658] do_syscall_64+0x3f/0x90 [ 116.221154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 116.221831] RIP: 0033:0x7f1979334d82 [ 116.222302] 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 [ 116.224516] RSP: 002b:00007ffd821d7b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 116.225458] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1979334d82 [ 116.226332] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f197876e000 [ 116.227220] RBP: 00007f197876e000 R08: 0000000000000009 R09: 0000000000001000 [ 116.228091] R10: 0000000000000812 R11: 0000000000000206 R12: 000055766aae0ec0 [ 116.228958] R13: 00007ffd821d7b30 R14: 00007ffd821d7b60 R15: 00007ffd821d7ec0 [ 116.229846] [ 116.230149] [ 116.230367] Allocated by task 213: [ 116.230834] kasan_save_stack+0x22/0x50 [ 116.231358] kasan_set_track+0x25/0x30 [ 116.231869] __kasan_slab_alloc+0x59/0x70 [ 116.232410] kmem_cache_alloc+0x16b/0x370 [ 116.232942] vm_area_dup+0x20/0x160 [ 116.233408] __split_vma+0x170/0x950 [ 116.233898] split_vma+0xc6/0x110 [ 116.234349] mprotect_fixup+0x8d2/0xb30 [ 116.234878] do_mprotect_pkey+0x87e/0xd40 [ 116.235416] __x64_sys_mprotect+0x78/0xc0 [ 116.235952] do_syscall_64+0x3f/0x90 [ 116.236440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 116.237112] [ 116.237333] Freed by task 213: [ 116.237740] kasan_save_stack+0x22/0x50 [ 116.238264] kasan_set_track+0x25/0x30 [ 116.238795] kasan_save_free_info+0x2b/0x50 [ 116.239346] __kasan_slab_free+0x10a/0x190 [ 116.239904] kmem_cache_free+0x10d/0x4d0 [ 116.240422] rcu_core+0x8c8/0x2860 [ 116.240902] __do_softirq+0x1b7/0x7d4 [ 116.241393] [ 116.241615] Last potentially related work creation: [ 116.242222] kasan_save_stack+0x22/0x50 [ 116.242756] __kasan_record_aux_stack+0x8e/0xa0 [ 116.243347] __call_rcu_common.constprop.0+0x6a/0xb90 [ 116.243992] remove_vma+0x139/0x170 [ 116.244443] do_vmi_align_munmap+0xd4a/0x11f0 [ 116.245004] do_vmi_munmap+0x1f1/0x2b0 [ 116.245497] __vm_munmap+0x138/0x3a0 [ 116.245969] __x64_sys_munmap+0x59/0x80 [ 116.246472] do_syscall_64+0x3f/0x90 [ 116.246961] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 116.247608] [ 116.247829] The buggy address belongs to the object at ffff8880186b62b8 [ 116.247829] which belongs to the cache vm_area_struct of size 168 [ 116.249328] The buggy address is located 88 bytes inside of [ 116.249328] freed 168-byte region [ffff8880186b62b8, ffff8880186b6360) [ 116.250783] [ 116.251001] The buggy address belongs to the physical page: [ 116.251659] page:00000000c2975d1c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x186b6 [ 116.252775] memcg:ffff8880169cbb01 [ 116.253203] flags: 0x100000000000200(slab|node=0|zone=1) [ 116.253844] page_type: 0xffffffff() [ 116.254298] raw: 0100000000000200 ffff88800879fc80 ffffea0000614a80 dead000000000006 [ 116.255240] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169cbb01 [ 116.256172] page dumped because: kasan: bad access detected [ 116.256833] [ 116.257052] Memory state around the buggy address: [ 116.257639] ffff8880186b6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 116.258498] ffff8880186b6280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 116.259369] >ffff8880186b6300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 116.260234] ^ [ 116.260701] ffff8880186b6380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 116.261566] ffff8880186b6400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 116.262425] ================================================================== [ 116.263466] Disabling lock debugging due to kernel taint [ 118.211459] BUG: Bad rss-counter state mm:000000009e435356 type:MM_FILEPAGES val:33 [ 118.212464] BUG: Bad rss-counter state mm:000000009e435356 type:MM_ANONPAGES val:22 [ 118.763835] BUG: Bad rss-counter state mm:00000000815f1f37 type:MM_FILEPAGES val:33 [ 118.765046] BUG: Bad rss-counter state mm:00000000815f1f37 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51750' (ECDSA) to the list of known hosts. 2023/06/20 03:56:21 fuzzer started 2023/06/20 03:56:21 dialing manager at localhost:44161 2023/06/20 03:56:21 checking machine... 2023/06/20 03:56:21 checking revisions... [ 119.454713] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:56:21 testing simple program... [ 119.510255] cgroup: Unknown subsys name 'net' [ 119.556135] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:54:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff856528e0 RCX=0000000000000000 RDX=ffff88801685d1c0 RSI=ffffffff814c83f1 RDI=ffff88801685d5b4 RBP=00007fa8cefb36c3 RSP=ffff88800f1d7948 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007fa8cefb36c3 R13=0000000000000000 R14=ffff88801685d1c0 R15=ffff88800c66ce00 RIP=ffffffff814c081b 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 00007fa8cead0900 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=00007f23201b7d50 CR3=0000000015fb8000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffebd38d2e8 CR3=0000000019700000 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=2030323a36353a3330203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a36353a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000