syzkaller login: [ 35.997201] BUG: Bad rss-counter state mm:00000000ef77c1b2 type:MM_FILEPAGES val:33 [ 35.998820] BUG: Bad rss-counter state mm:00000000ef77c1b2 type:MM_ANONPAGES val:22 [ 36.100275] ================================================================== [ 36.101451] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.102696] Read of size 8 at addr ffff88800c449798 by task sshd/219 [ 36.103635] [ 36.103904] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.104934] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.105867] Call Trace: [ 36.106173] [ 36.106445] dump_stack_lvl+0x91/0xf0 [ 36.106920] print_report+0xcc/0x620 [ 36.107377] ? __virt_addr_valid+0x102/0x340 [ 36.107900] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.108531] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.109116] kasan_report+0xbe/0xf0 [ 36.109573] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.110159] vma_interval_tree_remove+0xc75/0xec0 [ 36.110734] vma_prepare+0xc54/0x11a0 [ 36.111189] __split_vma+0x5af/0x950 [ 36.111640] ? __pfx___split_vma+0x10/0x10 [ 36.112186] ? find_held_lock+0x2c/0x110 [ 36.112699] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.113234] ? lock_is_held_type+0x9f/0x120 [ 36.113749] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.114335] ? mtree_range_walk+0x632/0x900 [ 36.114860] ? mas_walk+0x5c7/0x7c0 [ 36.115336] do_vmi_munmap+0x1f1/0x2b0 [ 36.115825] mmap_region+0x1f9/0x2660 [ 36.116340] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.116849] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.117550] ? __pfx_lock_acquire+0x10/0x10 [ 36.118085] ? __pfx_mmap_region+0x10/0x10 [ 36.118604] ? security_mmap_addr+0x7d/0xa0 [ 36.119141] ? get_unmapped_area+0x1f5/0x3f0 [ 36.119690] do_mmap+0x854/0xf00 [ 36.120162] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.120661] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.121229] ksys_mmap_pgoff+0x3af/0x500 [ 36.121737] do_syscall_64+0x3f/0x90 [ 36.122222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.122866] RIP: 0033:0x7ff6206c7d82 [ 36.123320] 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 [ 36.125483] RSP: 002b:00007ffcdc166c68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.126383] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff6206c7d82 [ 36.127236] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff61fb01000 [ 36.128123] RBP: 00007ff61fb01000 R08: 0000000000000009 R09: 0000000000001000 [ 36.128970] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e41b281ec0 [ 36.129808] R13: 00007ffcdc166c80 R14: 00007ffcdc166cb0 R15: 00007ffcdc167010 [ 36.130667] [ 36.130968] [ 36.131179] Allocated by task 212: [ 36.131608] kasan_save_stack+0x22/0x50 [ 36.132156] kasan_set_track+0x25/0x30 [ 36.132643] __kasan_slab_alloc+0x59/0x70 [ 36.133169] kmem_cache_alloc+0x16b/0x370 [ 36.133686] vm_area_dup+0x20/0x160 [ 36.134147] __split_vma+0x170/0x950 [ 36.134606] split_vma+0xc6/0x110 [ 36.135048] mprotect_fixup+0x8d2/0xb30 [ 36.135545] do_mprotect_pkey+0x87e/0xd40 [ 36.136098] __x64_sys_mprotect+0x78/0xc0 [ 36.136627] do_syscall_64+0x3f/0x90 [ 36.137098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.137739] [ 36.137950] Freed by task 212: [ 36.138330] kasan_save_stack+0x22/0x50 [ 36.138829] kasan_set_track+0x25/0x30 [ 36.139307] kasan_save_free_info+0x2b/0x50 [ 36.139833] __kasan_slab_free+0x10a/0x190 [ 36.140400] kmem_cache_free+0x10d/0x4d0 [ 36.140914] rcu_core+0x8c8/0x2860 [ 36.141349] __do_softirq+0x1b7/0x7d4 [ 36.141831] [ 36.142051] Last potentially related work creation: [ 36.142633] kasan_save_stack+0x22/0x50 [ 36.143131] __kasan_record_aux_stack+0x8e/0xa0 [ 36.143687] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.144516] remove_vma+0x139/0x170 [ 36.145095] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.145787] do_vmi_munmap+0x1f1/0x2b0 [ 36.146394] __vm_munmap+0x138/0x3a0 [ 36.146974] __x64_sys_munmap+0x59/0x80 [ 36.147590] do_syscall_64+0x3f/0x90 [ 36.148206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.149024] [ 36.149289] Second to last potentially related work creation: [ 36.150141] kasan_save_stack+0x22/0x50 [ 36.150768] __kasan_record_aux_stack+0x8e/0xa0 [ 36.151493] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.152330] remove_vma+0x139/0x170 [ 36.152876] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.153436] do_vmi_munmap+0x1f1/0x2b0 [ 36.153907] mmap_region+0x1f9/0x2660 [ 36.154387] do_mmap+0x854/0xf00 [ 36.154811] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.155295] ksys_mmap_pgoff+0x3af/0x500 [ 36.155779] do_syscall_64+0x3f/0x90 [ 36.156286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.156921] [ 36.157132] The buggy address belongs to the object at ffff88800c449740 [ 36.157132] which belongs to the cache vm_area_struct of size 168 [ 36.158579] The buggy address is located 88 bytes inside of [ 36.158579] freed 168-byte region [ffff88800c449740, ffff88800c4497e8) [ 36.159993] [ 36.160205] The buggy address belongs to the physical page: [ 36.160851] page:0000000080b466f5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc449 [ 36.161929] memcg:ffff88800d2f9801 [ 36.162355] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.163035] page_type: 0xffffffff() [ 36.163480] raw: 0100000000000200 ffff8880087a0c80 ffffea0000353a40 dead000000000007 [ 36.164390] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2f9801 [ 36.165288] page dumped because: kasan: bad access detected [ 36.165941] [ 36.166159] Memory state around the buggy address: [ 36.166727] ffff88800c449680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.167574] ffff88800c449700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 36.168430] >ffff88800c449780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 36.169280] ^ [ 36.169778] ffff88800c449800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 36.170625] ffff88800c449880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 36.171463] ================================================================== [ 36.172437] Disabling lock debugging due to kernel taint [ 38.377145] BUG: Bad rss-counter state mm:00000000be80894f type:MM_FILEPAGES val:33 [ 38.378942] BUG: Bad rss-counter state mm:00000000be80894f type:MM_ANONPAGES val:22 [ 38.941862] BUG: Bad rss-counter state mm:0000000076b12463 type:MM_FILEPAGES val:33 [ 38.943044] BUG: Bad rss-counter state mm:0000000076b12463 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33386' (ECDSA) to the list of known hosts. 2023/06/20 18:42:39 fuzzer started 2023/06/20 18:42:39 dialing manager at localhost:36067 2023/06/20 18:42:39 checking machine... 2023/06/20 18:42:39 checking revisions... [ 39.570612] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:42:39 testing simple program... [ 39.612428] cgroup: Unknown subsys name 'net' [ 39.656447] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:42:38 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652b60 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff86621198 RSP=ffff88806ce099f0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffffffff86621198 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800dd96280 RIP=ffffffff84511dc0 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 0000000000000000 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=00007f30e7973040 CR3=0000000015e4e000 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=32343a3831203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323937 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf3de00 RBX=0000000000092cc0 RCX=ffffffff812d86ea RDX=dffffc0000000000 RSI=0000000000092cc0 RDI=000000000202e301 RBP=ffff888018cb7c18 RSP=ffff888018cb7bd0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800844f780 R13=0000000000000000 R14=0000000000000000 R15=ffffffff8184725c RIP=ffffffff818081f9 RFL=00000282 [--S----] 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 00007ff18d222900 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=00007fffd27ed000 CR3=000000000f6e4000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000