syzkaller login: [ 43.921464] BUG: Bad rss-counter state mm:0000000036f13e93 type:MM_FILEPAGES val:33 [ 43.923587] BUG: Bad rss-counter state mm:0000000036f13e93 type:MM_ANONPAGES val:22 [ 44.087585] ================================================================== [ 44.088683] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.089771] Read of size 8 at addr ffff88800e18ed08 by task sshd/219 [ 44.090697] [ 44.090921] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.091775] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.092767] Call Trace: [ 44.093086] [ 44.093387] dump_stack_lvl+0x91/0xf0 [ 44.093891] print_report+0xcc/0x620 [ 44.094377] ? __virt_addr_valid+0x102/0x340 [ 44.094940] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.095570] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.096178] kasan_report+0xbe/0xf0 [ 44.096652] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.097282] vma_interval_tree_remove+0xc75/0xec0 [ 44.097879] vma_prepare+0xc54/0x11a0 [ 44.098354] __split_vma+0x5af/0x950 [ 44.098837] ? __pfx___split_vma+0x10/0x10 [ 44.099361] ? find_held_lock+0x2c/0x110 [ 44.099876] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.100439] ? lock_is_held_type+0x9f/0x120 [ 44.100968] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.101588] ? mtree_range_walk+0x632/0x900 [ 44.102133] ? mas_walk+0x5c7/0x7c0 [ 44.102606] do_vmi_munmap+0x1f1/0x2b0 [ 44.103095] mmap_region+0x1f9/0x2660 [ 44.103574] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.104080] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.104783] ? __pfx_lock_acquire+0x10/0x10 [ 44.105312] ? __pfx_mmap_region+0x10/0x10 [ 44.105838] ? security_mmap_addr+0x7d/0xa0 [ 44.106357] ? get_unmapped_area+0x1f5/0x3f0 [ 44.106900] do_mmap+0x854/0xf00 [ 44.107333] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.107825] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.108376] ksys_mmap_pgoff+0x3af/0x500 [ 44.108886] do_syscall_64+0x3f/0x90 [ 44.109372] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.110013] RIP: 0033:0x7f7761626d82 [ 44.110463] 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 [ 44.112537] RSP: 002b:00007ffccfb2a168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.113444] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7761626d82 [ 44.114278] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7760a60000 [ 44.115110] RBP: 00007f7760a60000 R08: 0000000000000009 R09: 0000000000001000 [ 44.115936] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564b60fe1f70 [ 44.116768] R13: 00007ffccfb2a180 R14: 00007ffccfb2a1b0 R15: 00007ffccfb2a510 [ 44.117643] [ 44.117932] [ 44.118143] Allocated by task 212: [ 44.118567] kasan_save_stack+0x22/0x50 [ 44.119064] kasan_set_track+0x25/0x30 [ 44.119557] __kasan_slab_alloc+0x59/0x70 [ 44.120079] kmem_cache_alloc+0x16b/0x370 [ 44.120589] vm_area_dup+0x20/0x160 [ 44.121033] __split_vma+0x170/0x950 [ 44.121516] split_vma+0xc6/0x110 [ 44.121951] mprotect_fixup+0x8d2/0xb30 [ 44.122446] do_mprotect_pkey+0x87e/0xd40 [ 44.122960] __x64_sys_mprotect+0x78/0xc0 [ 44.123476] do_syscall_64+0x3f/0x90 [ 44.123946] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.124582] [ 44.124795] Freed by task 212: [ 44.125179] kasan_save_stack+0x22/0x50 [ 44.125686] kasan_set_track+0x25/0x30 [ 44.126178] kasan_save_free_info+0x2b/0x50 [ 44.126710] __kasan_slab_free+0x10a/0x190 [ 44.127243] kmem_cache_free+0x10d/0x4d0 [ 44.127749] rcu_core+0x8c8/0x2860 [ 44.128184] __do_softirq+0x1b7/0x7d4 [ 44.128655] [ 44.128870] Last potentially related work creation: [ 44.129451] kasan_save_stack+0x22/0x50 [ 44.129949] __kasan_record_aux_stack+0x8e/0xa0 [ 44.130521] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.131157] remove_vma+0x139/0x170 [ 44.131606] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.132236] do_vmi_munmap+0x1f1/0x2b0 [ 44.132721] __vm_munmap+0x138/0x3a0 [ 44.133185] __x64_sys_munmap+0x59/0x80 [ 44.133691] do_syscall_64+0x3f/0x90 [ 44.134158] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.134797] [ 44.135010] Second to last potentially related work creation: [ 44.135688] kasan_save_stack+0x22/0x50 [ 44.136190] __kasan_record_aux_stack+0x8e/0xa0 [ 44.136759] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.137399] remove_vma+0x139/0x170 [ 44.137855] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.138412] do_vmi_munmap+0x1f1/0x2b0 [ 44.138893] mmap_region+0x1f9/0x2660 [ 44.139363] do_mmap+0x854/0xf00 [ 44.139793] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.140273] ksys_mmap_pgoff+0x3af/0x500 [ 44.140773] do_syscall_64+0x3f/0x90 [ 44.141258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.141894] [ 44.142106] The buggy address belongs to the object at ffff88800e18ecb0 [ 44.142106] which belongs to the cache vm_area_struct of size 168 [ 44.143568] The buggy address is located 88 bytes inside of [ 44.143568] freed 168-byte region [ffff88800e18ecb0, ffff88800e18ed58) [ 44.144958] [ 44.145172] The buggy address belongs to the physical page: [ 44.145832] page:000000005e209f94 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe18e [ 44.146905] memcg:ffff88800dcb7b01 [ 44.147331] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.147964] page_type: 0xffffffff() [ 44.148415] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 44.149327] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcb7b01 [ 44.150223] page dumped because: kasan: bad access detected [ 44.150883] [ 44.151095] Memory state around the buggy address: [ 44.151667] ffff88800e18ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 44.152508] ffff88800e18ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 44.153376] >ffff88800e18ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 44.154219] ^ [ 44.154654] ffff88800e18ed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.155497] ffff88800e18ee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 44.156334] ================================================================== [ 44.157276] Disabling lock debugging due to kernel taint [ 46.122453] BUG: Bad rss-counter state mm:00000000783209d6 type:MM_FILEPAGES val:33 [ 46.124341] BUG: Bad rss-counter state mm:00000000783209d6 type:MM_ANONPAGES val:22 [ 46.589771] BUG: Bad rss-counter state mm:0000000005bebbaa type:MM_FILEPAGES val:33 [ 46.590756] BUG: Bad rss-counter state mm:0000000005bebbaa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20362' (ECDSA) to the list of known hosts. 2023/06/19 11:01:11 fuzzer started 2023/06/19 11:01:11 dialing manager at localhost:44161 2023/06/19 11:01:11 checking machine... 2023/06/19 11:01:11 checking revisions... [ 47.388201] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:01:11 testing simple program... [ 47.438723] cgroup: Unknown subsys name 'net' [ 47.486418] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:00:57 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffffffff86053a30 RCX=ffffffff846000a9 RDX=0000000000000000 RSI=ffffffff864b9d50 RDI=ffffffff86053a2c RBP=ffffffff86053a30 RSP=ffff88800efe70b8 R8 =ffffffff864b9d50 R9 =ffff88800efe71b0 R10=0000000000038001 R11=00000000000b6996 R12=ffffffff86053a30 R13=ffffffff86053a2c R14=ffffffff86053a2c R15=dffffc0000000000 RIP=ffffffff8112fc8e 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 00007f27005a8900 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=00007f2700587020 CR3=0000000016732000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007fe730010000 CR3=000000000d912000 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=2030313a31303a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a31303a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000