syzkaller login: [ 67.970653] BUG: Bad rss-counter state mm:00000000016cbe12 type:MM_FILEPAGES val:33 [ 67.972105] BUG: Bad rss-counter state mm:00000000016cbe12 type:MM_ANONPAGES val:22 [ 68.126356] ================================================================== [ 68.127274] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.128220] Read of size 8 at addr ffff888019470058 by task sshd/220 [ 68.128986] [ 68.129293] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 68.130304] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.131300] Call Trace: [ 68.131614] [ 68.131913] dump_stack_lvl+0x91/0xf0 [ 68.132399] print_report+0xcc/0x620 [ 68.132875] ? __virt_addr_valid+0x102/0x340 [ 68.133419] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.134027] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.134637] kasan_report+0xbe/0xf0 [ 68.135119] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.135731] vma_interval_tree_remove+0xc75/0xec0 [ 68.136342] vma_prepare+0xc54/0x11a0 [ 68.136818] __split_vma+0x5af/0x950 [ 68.137284] ? __pfx___split_vma+0x10/0x10 [ 68.137807] ? find_held_lock+0x2c/0x110 [ 68.138323] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.138884] ? lock_is_held_type+0x9f/0x120 [ 68.139428] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.140067] ? mtree_range_walk+0x632/0x900 [ 68.140612] ? mas_walk+0x5c7/0x7c0 [ 68.141081] do_vmi_munmap+0x1f1/0x2b0 [ 68.141575] mmap_region+0x1f9/0x2660 [ 68.142052] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.142559] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.143271] ? __pfx_lock_acquire+0x10/0x10 [ 68.143806] ? __pfx_mmap_region+0x10/0x10 [ 68.144334] ? security_mmap_addr+0x7d/0xa0 [ 68.144862] ? get_unmapped_area+0x1f5/0x3f0 [ 68.145414] do_mmap+0x854/0xf00 [ 68.145850] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.146342] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.146901] ksys_mmap_pgoff+0x3af/0x500 [ 68.147412] do_syscall_64+0x3f/0x90 [ 68.147900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.148547] RIP: 0033:0x7f40b6e03d82 [ 68.149004] 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 [ 68.151130] RSP: 002b:00007ffce38635d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.152040] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f40b6e03d82 [ 68.152884] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f40b623d000 [ 68.153722] RBP: 00007f40b623d000 R08: 0000000000000009 R09: 0000000000001000 [ 68.154562] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555fd8d5aec0 [ 68.155399] R13: 00007ffce38635f0 R14: 00007ffce3863620 R15: 00007ffce3863980 [ 68.156270] [ 68.156563] [ 68.156777] Allocated by task 213: [ 68.157202] kasan_save_stack+0x22/0x50 [ 68.157702] kasan_set_track+0x25/0x30 [ 68.158193] __kasan_slab_alloc+0x59/0x70 [ 68.158713] kmem_cache_alloc+0x16b/0x370 [ 68.159236] vm_area_dup+0x20/0x160 [ 68.159684] __split_vma+0x170/0x950 [ 68.160174] split_vma+0xc6/0x110 [ 68.160609] mprotect_fixup+0x8d2/0xb30 [ 68.161112] do_mprotect_pkey+0x87e/0xd40 [ 68.161628] __x64_sys_mprotect+0x78/0xc0 [ 68.162152] do_syscall_64+0x3f/0x90 [ 68.162619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.163252] [ 68.163467] Freed by task 213: [ 68.163869] kasan_save_stack+0x22/0x50 [ 68.164367] kasan_set_track+0x25/0x30 [ 68.164856] kasan_save_free_info+0x2b/0x50 [ 68.165381] __kasan_slab_free+0x10a/0x190 [ 68.165909] kmem_cache_free+0x10d/0x4d0 [ 68.166413] rcu_core+0x8c8/0x2860 [ 68.166851] __do_softirq+0x1b7/0x7d4 [ 68.167334] [ 68.167548] Last potentially related work creation: [ 68.168143] kasan_save_stack+0x22/0x50 [ 68.168649] __kasan_record_aux_stack+0x8e/0xa0 [ 68.169220] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.169860] remove_vma+0x139/0x170 [ 68.170307] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.170866] do_vmi_munmap+0x1f1/0x2b0 [ 68.171345] __vm_munmap+0x138/0x3a0 [ 68.171820] __x64_sys_munmap+0x59/0x80 [ 68.172314] do_syscall_64+0x3f/0x90 [ 68.172783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.173420] [ 68.173634] The buggy address belongs to the object at ffff888019470000 [ 68.173634] which belongs to the cache vm_area_struct of size 168 [ 68.175103] The buggy address is located 88 bytes inside of [ 68.175103] freed 168-byte region [ffff888019470000, ffff8880194700a8) [ 68.176502] [ 68.176715] The buggy address belongs to the physical page: [ 68.177374] page:00000000ceafd5b8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19470 [ 68.178449] memcg:ffff888014576301 [ 68.178877] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.179524] page_type: 0xffffffff() [ 68.179987] raw: 0100000000000200 ffff88800879fc80 ffffea0000690480 dead000000000002 [ 68.180900] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014576301 [ 68.181806] page dumped because: kasan: bad access detected [ 68.182459] [ 68.182672] Memory state around the buggy address: [ 68.183248] ffff88801946ff00: 00 00 00 00 00 00 00 00 fc fc fc fc 00 00 00 00 [ 68.184113] ffff88801946ff80: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc [ 68.184958] >ffff888019470000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.185806] ^ [ 68.186528] ffff888019470080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 68.187376] ffff888019470100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.188252] ================================================================== [ 68.189230] Disabling lock debugging due to kernel taint [ 70.244758] BUG: Bad rss-counter state mm:00000000e18393b1 type:MM_FILEPAGES val:33 [ 70.246360] BUG: Bad rss-counter state mm:00000000e18393b1 type:MM_ANONPAGES val:22 [ 70.698969] BUG: Bad rss-counter state mm:0000000080d03dc2 type:MM_FILEPAGES val:33 [ 70.699989] BUG: Bad rss-counter state mm:0000000080d03dc2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62112' (ECDSA) to the list of known hosts. 2023/06/19 16:44:17 fuzzer started 2023/06/19 16:44:17 dialing manager at localhost:44161 2023/06/19 16:44:17 checking machine... 2023/06/19 16:44:17 checking revisions... [ 71.407782] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:44:17 testing simple program... [ 71.456050] cgroup: Unknown subsys name 'net' [ 71.509944] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:43:48 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=0000000000000001 RDX=0000000000092cc0 RSI=ffffffff818470dc RDI=ffff88800844f780 RBP=ffff88800ff67a68 RSP=ffff88800ff67a10 R8 =ffff88800ff67a30 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800844f780 R13=ffff88800e9fb130 R14=0000000000000000 R15=0000000000092cc0 RIP=ffffffff8135b905 RFL=00000286 [--S--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 00007fdd8d75d900 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=00007fdd8dd14618 CR3=000000000e5f6000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007ffecb683828 CR3=000000000e4fc000 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=2037313a34343a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a34343a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000