syzkaller login: [ 31.066247] BUG: Bad rss-counter state mm:0000000059d12f79 type:MM_FILEPAGES val:33 [ 31.067123] BUG: Bad rss-counter state mm:0000000059d12f79 type:MM_ANONPAGES val:22 [ 31.174556] ================================================================== [ 31.175225] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.175867] Read of size 8 at addr ffff888019bef880 by task sshd/220 [ 31.176412] [ 31.176564] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.177172] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.177857] Call Trace: [ 31.178085] [ 31.178301] dump_stack_lvl+0x91/0xf0 [ 31.178774] print_report+0xcc/0x620 [ 31.179143] ? __virt_addr_valid+0x102/0x340 [ 31.179530] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.179952] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.180384] kasan_report+0xbe/0xf0 [ 31.180722] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.181174] vma_interval_tree_remove+0xc75/0xec0 [ 31.181593] vma_prepare+0xc54/0x11a0 [ 31.181933] __split_vma+0x5af/0x950 [ 31.182316] ? __pfx___split_vma+0x10/0x10 [ 31.182701] ? find_held_lock+0x2c/0x110 [ 31.183074] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.183466] ? lock_is_held_type+0x9f/0x120 [ 31.183836] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.184252] ? mtree_range_walk+0x632/0x900 [ 31.184631] ? mas_walk+0x5c7/0x7c0 [ 31.184959] do_vmi_munmap+0x1f1/0x2b0 [ 31.185295] mmap_region+0x1f9/0x2660 [ 31.185624] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.185982] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.186510] ? __pfx_lock_acquire+0x10/0x10 [ 31.186877] ? __pfx_mmap_region+0x10/0x10 [ 31.187237] ? security_mmap_addr+0x7d/0xa0 [ 31.187606] ? get_unmapped_area+0x1f5/0x3f0 [ 31.187993] do_mmap+0x854/0xf00 [ 31.188316] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.188666] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.189054] ksys_mmap_pgoff+0x3af/0x500 [ 31.189387] do_syscall_64+0x3f/0x90 [ 31.189711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.190180] RIP: 0033:0x7fafc145dd82 [ 31.190492] 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 [ 31.191954] RSP: 002b:00007ffede7536f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.192577] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fafc145dd82 [ 31.193189] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fafc0897000 [ 31.193799] RBP: 00007fafc0897000 R08: 0000000000000009 R09: 0000000000001000 [ 31.194409] R10: 0000000000000812 R11: 0000000000000206 R12: 000055825e5b9ec0 [ 31.194958] R13: 00007ffede753710 R14: 00007ffede753740 R15: 00007ffede753aa0 [ 31.195516] [ 31.195706] [ 31.195843] Allocated by task 213: [ 31.196125] kasan_save_stack+0x22/0x50 [ 31.196466] kasan_set_track+0x25/0x30 [ 31.196784] __kasan_slab_alloc+0x59/0x70 [ 31.197153] kmem_cache_alloc+0x16b/0x370 [ 31.197520] vm_area_dup+0x20/0x160 [ 31.197810] __split_vma+0x170/0x950 [ 31.198120] split_vma+0xc6/0x110 [ 31.198461] mprotect_fixup+0x8d2/0xb30 [ 31.198803] do_mprotect_pkey+0x87e/0xd40 [ 31.199146] __x64_sys_mprotect+0x78/0xc0 [ 31.199523] do_syscall_64+0x3f/0x90 [ 31.199858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.200276] [ 31.200424] Freed by task 213: [ 31.200694] kasan_save_stack+0x22/0x50 [ 31.201033] kasan_set_track+0x25/0x30 [ 31.201359] kasan_save_free_info+0x2b/0x50 [ 31.201718] __kasan_slab_free+0x10a/0x190 [ 31.202088] kmem_cache_free+0x10d/0x4d0 [ 31.202485] rcu_core+0x8c8/0x2860 [ 31.202778] __do_softirq+0x1b7/0x7d4 [ 31.203112] [ 31.203272] Last potentially related work creation: [ 31.203688] kasan_save_stack+0x22/0x50 [ 31.204028] __kasan_record_aux_stack+0x8e/0xa0 [ 31.204429] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.204871] remove_vma+0x139/0x170 [ 31.205195] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.205538] do_vmi_munmap+0x1f1/0x2b0 [ 31.205857] __vm_munmap+0x138/0x3a0 [ 31.206187] __x64_sys_munmap+0x59/0x80 [ 31.206553] do_syscall_64+0x3f/0x90 [ 31.206882] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.207297] [ 31.207433] The buggy address belongs to the object at ffff888019bef828 [ 31.207433] which belongs to the cache vm_area_struct of size 168 [ 31.208384] The buggy address is located 88 bytes inside of [ 31.208384] freed 168-byte region [ffff888019bef828, ffff888019bef8d0) [ 31.209321] [ 31.209471] The buggy address belongs to the physical page: [ 31.209921] page:0000000040f734cf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19bef [ 31.210696] memcg:ffff88800c575f01 [ 31.211002] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.211434] page_type: 0xffffffff() [ 31.211738] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.212305] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c575f01 [ 31.212986] page dumped because: kasan: bad access detected [ 31.213472] [ 31.213622] Memory state around the buggy address: [ 31.214037] ffff888019bef780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.214702] ffff888019bef800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.215351] >ffff888019bef880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.215925] ^ [ 31.216202] ffff888019bef900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.216792] ffff888019bef980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.217343] ================================================================== [ 31.218044] Disabling lock debugging due to kernel taint [ 32.817047] BUG: Bad rss-counter state mm:0000000032b397c2 type:MM_FILEPAGES val:33 [ 32.817810] BUG: Bad rss-counter state mm:0000000032b397c2 type:MM_ANONPAGES val:22 [ 33.119884] BUG: Bad rss-counter state mm:0000000031f386aa type:MM_FILEPAGES val:33 [ 33.120624] BUG: Bad rss-counter state mm:0000000031f386aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7154' (ECDSA) to the list of known hosts. 2023/06/20 09:36:34 fuzzer started 2023/06/20 09:36:34 dialing manager at localhost:44161 2023/06/20 09:36:34 checking machine... 2023/06/20 09:36:34 checking revisions... [ 33.707537] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:36:34 testing simple program... [ 33.741900] cgroup: Unknown subsys name 'net' [ 33.781086] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:36:33 Registers: info registers vcpu 0 RAX=ffffffff86137004 RBX=0000000000000001 RCX=ffffffff81809910 RDX=0000000000000000 RSI=ffffffff86137004 RDI=ffffffff85dfc6a4 RBP=ffff888015c075d8 RSP=ffff888015c07500 R8 =ffffffff86137004 R9 =ffff888015c075c0 R10=0000000000038001 R11=0000000000020cb4 R12=ffff888015c075e0 R13=ffff888015c075c8 R14=ffff888015c075c1 R15=dffffc0000000000 RIP=ffffffff8112fcbf 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 00007f67f10c7900 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=00007f67f0525be0 CR3=000000001457c000 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=14a62a16aadeac8bd1457015ea810f68 XMM02=000000000011c5c8d59e07bde36eea69 XMM03=000000000011c6f0ec2efd57dc4c00df XMM04=22a3fb831497fca700000000000ae988 XMM05=db7421d430ff557c0000000000134770 XMM06=4fda316b135da52b0000000000133560 XMM07=fb795ef6d65770560000000000123b90 XMM08=2c67c8bc2e329bc3000000000011c6f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86088c1f RBX=0000000000000001 RCX=ffffffff86088c1a RDX=0000000000000002 RSI=0000000000000007 RDI=ffffffff85d88408 RBP=ffff88801029fa58 RSP=ffff88801029f940 R8 =ffffffff86088c1a R9 =ffff88801029fa40 R10=0000000000038001 R11=0000000000003c0d R12=ffff88801029fa60 R13=ffff88801029fa48 R14=ffff88801029fa41 R15=ffff88801029fa00 RIP=ffffffff81130a72 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 00007f6a6bfdc900 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=00007ffe9ac1c000 CR3=000000000c508000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000