syzkaller login: [ 30.802919] BUG: Bad rss-counter state mm:00000000c79387a0 type:MM_FILEPAGES val:33 [ 30.804119] BUG: Bad rss-counter state mm:00000000c79387a0 type:MM_ANONPAGES val:22 [ 30.843452] ================================================================== [ 30.844486] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.845439] Read of size 8 at addr ffff88800cc02798 by task sshd/220 [ 30.846305] [ 30.846584] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.847443] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.848414] Call Trace: [ 30.848762] [ 30.849051] dump_stack_lvl+0x91/0xf0 [ 30.849547] print_report+0xcc/0x620 [ 30.850037] ? __virt_addr_valid+0x102/0x340 [ 30.850593] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.851214] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.851834] kasan_report+0xbe/0xf0 [ 30.852318] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.852953] vma_interval_tree_remove+0xc75/0xec0 [ 30.853562] vma_prepare+0xc54/0x11a0 [ 30.854046] __split_vma+0x5af/0x950 [ 30.854529] ? __pfx___split_vma+0x10/0x10 [ 30.855099] ? find_held_lock+0x2c/0x110 [ 30.855649] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.856240] ? lock_is_held_type+0x9f/0x120 [ 30.856829] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.857470] ? mtree_range_walk+0x632/0x900 [ 30.858058] ? mas_walk+0x5c7/0x7c0 [ 30.858564] do_vmi_munmap+0x1f1/0x2b0 [ 30.859087] mmap_region+0x1f9/0x2660 [ 30.859599] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.860137] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.860897] ? __pfx_lock_acquire+0x10/0x10 [ 30.861461] ? __pfx_mmap_region+0x10/0x10 [ 30.862024] ? security_mmap_addr+0x7d/0xa0 [ 30.862579] ? get_unmapped_area+0x1f5/0x3f0 [ 30.863158] do_mmap+0x854/0xf00 [ 30.863628] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.864156] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.864766] ksys_mmap_pgoff+0x3af/0x500 [ 30.865304] do_syscall_64+0x3f/0x90 [ 30.865816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.866501] RIP: 0033:0x7f3ee9966d82 [ 30.866984] 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 [ 30.869242] RSP: 002b:00007fffbed11f68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.870212] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3ee9966d82 [ 30.871111] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3ee8da0000 [ 30.872006] RBP: 00007f3ee8da0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.872910] R10: 0000000000000812 R11: 0000000000000206 R12: 000056061853bb20 [ 30.873815] R13: 00007fffbed11f80 R14: 00007fffbed11fb0 R15: 00007fffbed12310 [ 30.874714] [ 30.875025] [ 30.875251] Allocated by task 213: [ 30.875704] kasan_save_stack+0x22/0x50 [ 30.876237] kasan_set_track+0x25/0x30 [ 30.876775] __kasan_slab_alloc+0x59/0x70 [ 30.877331] kmem_cache_alloc+0x16b/0x370 [ 30.877879] vm_area_dup+0x20/0x160 [ 30.878355] __split_vma+0x170/0x950 [ 30.878856] split_vma+0xc6/0x110 [ 30.879322] mprotect_fixup+0x8d2/0xb30 [ 30.879854] do_mprotect_pkey+0x87e/0xd40 [ 30.880401] __x64_sys_mprotect+0x78/0xc0 [ 30.880964] do_syscall_64+0x3f/0x90 [ 30.881465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.882147] [ 30.882379] Freed by task 213: [ 30.882794] kasan_save_stack+0x22/0x50 [ 30.883325] kasan_set_track+0x25/0x30 [ 30.883847] kasan_save_free_info+0x2b/0x50 [ 30.884406] __kasan_slab_free+0x10a/0x190 [ 30.884992] kmem_cache_free+0x10d/0x4d0 [ 30.885532] rcu_core+0x8c8/0x2860 [ 30.886000] __do_softirq+0x1b7/0x7d4 [ 30.886507] [ 30.886739] Last potentially related work creation: [ 30.887425] kasan_save_stack+0x22/0x50 [ 30.887958] __kasan_record_aux_stack+0x8e/0xa0 [ 30.888565] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.889256] remove_vma+0x139/0x170 [ 30.889731] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.890323] do_vmi_munmap+0x1f1/0x2b0 [ 30.890838] __vm_munmap+0x138/0x3a0 [ 30.891335] __x64_sys_munmap+0x59/0x80 [ 30.891866] do_syscall_64+0x3f/0x90 [ 30.892365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.893053] [ 30.893284] The buggy address belongs to the object at ffff88800cc02740 [ 30.893284] which belongs to the cache vm_area_struct of size 168 [ 30.894831] The buggy address is located 88 bytes inside of [ 30.894831] freed 168-byte region [ffff88800cc02740, ffff88800cc027e8) [ 30.896308] [ 30.896534] The buggy address belongs to the physical page: [ 30.897242] page:00000000ffe3752a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc02 [ 30.898385] memcg:ffff888010248f01 [ 30.898863] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.899582] page_type: 0xffffffff() [ 30.900090] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.901148] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010248f01 [ 30.902180] page dumped because: kasan: bad access detected [ 30.902930] [ 30.903174] Memory state around the buggy address: [ 30.903826] ffff88800cc02680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.904791] ffff88800cc02700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.905752] >ffff88800cc02780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.906712] ^ [ 30.907270] ffff88800cc02800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.908222] ffff88800cc02880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.909187] ================================================================== [ 30.910303] Disabling lock debugging due to kernel taint [ 33.109124] BUG: Bad rss-counter state mm:00000000df75b2c4 type:MM_FILEPAGES val:33 [ 33.110223] BUG: Bad rss-counter state mm:00000000df75b2c4 type:MM_ANONPAGES val:22 [ 33.599123] BUG: Bad rss-counter state mm:000000007ddaf20f type:MM_FILEPAGES val:33 [ 33.600295] BUG: Bad rss-counter state mm:000000007ddaf20f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22056' (ECDSA) to the list of known hosts. 2023/06/21 07:40:38 fuzzer started 2023/06/21 07:40:38 dialing manager at localhost:36067 2023/06/21 07:40:38 checking machine... 2023/06/21 07:40:38 checking revisions... [ 34.260093] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:40:38 testing simple program... [ 34.306128] cgroup: Unknown subsys name 'net' [ 34.393332] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:40:38 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86138eb0 RDX=1ffff11002c01f41 RSI=1ffff11002c01f40 RDI=1ffff11002c01f40 RBP=ffff88801600fa00 RSP=ffff88801600f938 R8 =ffffffff86138eb4 R9 =ffff88801600f9e8 R10=0000000000038001 R11=0000000000020d9c R12=ffff88801600fa08 R13=ffff88801600f9f0 R14=ffff88801600fd08 R15=ffff88801600f9a8 RIP=ffffffff811310ce 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 00007fe8b3f7f900 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=00007fe8b45370b0 CR3=000000000e360000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=0000000000000001 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=00007f3b4f416a80 CR3=000000000f01c000 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=7e3d2364aabd859aa343a7152b86817f XMM02=000000000011a660ec2efd57dc4c00df XMM03=0000000000121ed00b9781219d368d8a XMM04=09ede8ca9d10483d00000000000ae988 XMM05=d3dea4ea13ba67d00000000000132ae0 XMM06=4fda316b135da52b0000000000131b80 XMM07=e042d86d42eb936e0000000000122150 XMM08=0b9781219d368d8a000000000011a6c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000