syzkaller login: [ 40.042318] BUG: Bad rss-counter state mm:00000000c4dd6094 type:MM_FILEPAGES val:33 [ 40.043534] BUG: Bad rss-counter state mm:00000000c4dd6094 type:MM_ANONPAGES val:22 [ 40.080164] ================================================================== [ 40.081281] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.082424] Read of size 8 at addr ffff888016f48880 by task sshd/219 [ 40.083417] [ 40.083649] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.084750] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.085958] Call Trace: [ 40.086295] [ 40.086698] dump_stack_lvl+0x91/0xf0 [ 40.087307] print_report+0xcc/0x620 [ 40.087849] ? __virt_addr_valid+0x102/0x340 [ 40.088473] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.089272] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.089978] kasan_report+0xbe/0xf0 [ 40.090510] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.091191] vma_interval_tree_remove+0xc75/0xec0 [ 40.092074] vma_prepare+0xc54/0x11a0 [ 40.092604] __split_vma+0x5af/0x950 [ 40.093240] ? __pfx___split_vma+0x10/0x10 [ 40.093977] ? find_held_lock+0x2c/0x110 [ 40.094557] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.095278] ? lock_is_held_type+0x9f/0x120 [ 40.095961] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.096767] ? mtree_range_walk+0x632/0x900 [ 40.097395] ? mas_walk+0x5c7/0x7c0 [ 40.097918] do_vmi_munmap+0x1f1/0x2b0 [ 40.098467] mmap_region+0x1f9/0x2660 [ 40.098989] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.099544] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.100318] ? __pfx_lock_acquire+0x10/0x10 [ 40.100892] ? __pfx_mmap_region+0x10/0x10 [ 40.101467] ? security_mmap_addr+0x7d/0xa0 [ 40.102045] ? get_unmapped_area+0x1f5/0x3f0 [ 40.102659] do_mmap+0x854/0xf00 [ 40.103133] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.103672] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.104282] ksys_mmap_pgoff+0x3af/0x500 [ 40.104831] do_syscall_64+0x3f/0x90 [ 40.105344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.106046] RIP: 0033:0x7f4cd490dd82 [ 40.106546] 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 [ 40.109030] RSP: 002b:00007fff45a9c588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.110014] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4cd490dd82 [ 40.110952] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4cd3d47000 [ 40.111854] RBP: 00007f4cd3d47000 R08: 0000000000000009 R09: 0000000000001000 [ 40.112761] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556bc0732980 [ 40.113671] R13: 00007fff45a9c5a0 R14: 00007fff45a9c5d0 R15: 00007fff45a9c930 [ 40.114596] [ 40.114906] [ 40.115135] Allocated by task 212: [ 40.115593] kasan_save_stack+0x22/0x50 [ 40.116123] kasan_set_track+0x25/0x30 [ 40.116651] __kasan_slab_alloc+0x59/0x70 [ 40.117206] kmem_cache_alloc+0x16b/0x370 [ 40.117755] vm_area_dup+0x20/0x160 [ 40.118235] __split_vma+0x170/0x950 [ 40.118746] split_vma+0xc6/0x110 [ 40.119207] mprotect_fixup+0x8d2/0xb30 [ 40.119742] do_mprotect_pkey+0x87e/0xd40 [ 40.120302] __x64_sys_mprotect+0x78/0xc0 [ 40.120864] do_syscall_64+0x3f/0x90 [ 40.121367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.122055] [ 40.122291] Freed by task 203: [ 40.122722] kasan_save_stack+0x22/0x50 [ 40.123262] kasan_set_track+0x25/0x30 [ 40.123791] kasan_save_free_info+0x2b/0x50 [ 40.124357] __kasan_slab_free+0x10a/0x190 [ 40.124920] kmem_cache_free+0x10d/0x4d0 [ 40.125456] rcu_core+0x8c8/0x2860 [ 40.125929] __do_softirq+0x1b7/0x7d4 [ 40.126431] [ 40.126656] Last potentially related work creation: [ 40.127265] kasan_save_stack+0x22/0x50 [ 40.127792] __kasan_record_aux_stack+0x8e/0xa0 [ 40.128400] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.129067] remove_vma+0x139/0x170 [ 40.129543] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.130129] do_vmi_munmap+0x1f1/0x2b0 [ 40.130664] __vm_munmap+0x138/0x3a0 [ 40.131158] __x64_sys_munmap+0x59/0x80 [ 40.131682] do_syscall_64+0x3f/0x90 [ 40.132180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.132853] [ 40.133078] Second to last potentially related work creation: [ 40.133794] kasan_save_stack+0x22/0x50 [ 40.134322] __kasan_record_aux_stack+0x8e/0xa0 [ 40.134931] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.135609] remove_vma+0x139/0x170 [ 40.136087] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.136675] do_vmi_munmap+0x1f1/0x2b0 [ 40.137184] mmap_region+0x1f9/0x2660 [ 40.137679] do_mmap+0x854/0xf00 [ 40.138130] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.138641] ksys_mmap_pgoff+0x3af/0x500 [ 40.139157] do_syscall_64+0x3f/0x90 [ 40.139644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.140309] [ 40.140530] The buggy address belongs to the object at ffff888016f48828 [ 40.140530] which belongs to the cache vm_area_struct of size 168 [ 40.142034] The buggy address is located 88 bytes inside of [ 40.142034] freed 168-byte region [ffff888016f48828, ffff888016f488d0) [ 40.143488] [ 40.143712] The buggy address belongs to the physical page: [ 40.144390] page:00000000a91ceb1e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16f48 [ 40.145502] memcg:ffff888016e67c01 [ 40.145943] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.146674] page_type: 0xffffffff() [ 40.147135] raw: 0100000000000200 ffff88800879fc80 ffffea0000358840 0000000000000005 [ 40.148079] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e67c01 [ 40.149017] page dumped because: kasan: bad access detected [ 40.149706] [ 40.149925] Memory state around the buggy address: [ 40.150540] ffff888016f48780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 40.151416] ffff888016f48800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 40.152296] >ffff888016f48880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 40.153162] ^ [ 40.153588] ffff888016f48900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.154489] ffff888016f48980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 40.155347] ================================================================== [ 40.156768] Disabling lock debugging due to kernel taint [ 42.166286] BUG: Bad rss-counter state mm:00000000647b025d type:MM_FILEPAGES val:33 [ 42.167453] BUG: Bad rss-counter state mm:00000000647b025d type:MM_ANONPAGES val:22 [ 42.580296] BUG: Bad rss-counter state mm:00000000be4e6d81 type:MM_FILEPAGES val:33 [ 42.581488] BUG: Bad rss-counter state mm:00000000be4e6d81 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42515' (ECDSA) to the list of known hosts. 2023/06/20 00:43:50 fuzzer started 2023/06/20 00:43:50 dialing manager at localhost:44161 2023/06/20 00:43:50 checking machine... 2023/06/20 00:43:50 checking revisions... [ 43.332998] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:43:50 testing simple program... [ 43.383957] cgroup: Unknown subsys name 'net' [ 43.427039] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:43:49 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880159551c0 RSI=ffffffff81b3c0f7 RDI=0000000000000005 RBP=ffff888015d3cc00 RSP=ffff88801993f8a8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff888015e83b08 R14=ffff88801919efa8 R15=ffff88801993f9d8 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 00007f138f37d700 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=00007ffff53d0c78 CR3=0000000006af8000 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=2039343a33343a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a33343a3030203032 XMM08=3d656e696c646d632022656369767265 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=ffff888008c58400 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=00007f3a91e21810 CR3=000000000d65a000 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=662c07a305f00eafa54361fbd4d3be22 XMM02=000000000011cef0eff9b2d0a8fce9cb XMM03=000000000011cfc02c67c8bc2e329bc3 XMM04=4f94b1004cd738b400000000000ae988 XMM05=dfcdbad4f1609c370000000000134510 XMM06=445fec995bdcceb300000000001336e8 XMM07=e042d86d42eb936e0000000000123b80 XMM08=e2657143393ce39f000000000011cfc0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000