syzkaller login: [ 32.135988] BUG: Bad rss-counter state mm:00000000b4c4ba0a type:MM_FILEPAGES val:33 [ 32.137245] BUG: Bad rss-counter state mm:00000000b4c4ba0a type:MM_ANONPAGES val:22 [ 32.178905] ================================================================== [ 32.179919] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.180894] Read of size 8 at addr ffff88800ee676b0 by task sshd/221 [ 32.181679] [ 32.181903] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.182791] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.183811] Call Trace: [ 32.184138] [ 32.184435] dump_stack_lvl+0x91/0xf0 [ 32.184936] print_report+0xcc/0x620 [ 32.185434] ? __virt_addr_valid+0x102/0x340 [ 32.185980] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.186615] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.187239] kasan_report+0xbe/0xf0 [ 32.187774] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.188419] vma_interval_tree_remove+0xc75/0xec0 [ 32.189018] vma_prepare+0xc54/0x11a0 [ 32.189513] __split_vma+0x5af/0x950 [ 32.189988] ? __pfx___split_vma+0x10/0x10 [ 32.190523] ? find_held_lock+0x2c/0x110 [ 32.191044] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.191620] ? lock_is_held_type+0x9f/0x120 [ 32.192234] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.192846] ? mtree_range_walk+0x632/0x900 [ 32.193413] ? mas_walk+0x5c7/0x7c0 [ 32.193890] do_vmi_munmap+0x1f1/0x2b0 [ 32.194402] mmap_region+0x1f9/0x2660 [ 32.194886] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.195415] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.196165] ? __pfx_lock_acquire+0x10/0x10 [ 32.196718] ? __pfx_mmap_region+0x10/0x10 [ 32.197253] ? security_mmap_addr+0x7d/0xa0 [ 32.197797] ? get_unmapped_area+0x1f5/0x3f0 [ 32.198358] do_mmap+0x854/0xf00 [ 32.198799] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.199301] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.199906] ksys_mmap_pgoff+0x3af/0x500 [ 32.200449] do_syscall_64+0x3f/0x90 [ 32.200927] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.201586] RIP: 0033:0x7ffbea798d82 [ 32.202044] 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 [ 32.204238] RSP: 002b:00007ffd484aa9d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.205145] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffbea798d82 [ 32.205994] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffbe9bd2000 [ 32.206841] RBP: 00007ffbe9bd2000 R08: 0000000000000009 R09: 0000000000001000 [ 32.207721] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558a1191ff70 [ 32.208597] R13: 00007ffd484aa9f0 R14: 00007ffd484aaa20 R15: 00007ffd484aad80 [ 32.209470] [ 32.209764] [ 32.209982] Allocated by task 214: [ 32.210411] kasan_save_stack+0x22/0x50 [ 32.210923] kasan_set_track+0x25/0x30 [ 32.211420] __kasan_slab_alloc+0x59/0x70 [ 32.211991] kmem_cache_alloc+0x16b/0x370 [ 32.212532] vm_area_dup+0x20/0x160 [ 32.212991] __split_vma+0x170/0x950 [ 32.213457] split_vma+0xc6/0x110 [ 32.213915] mprotect_fixup+0x8d2/0xb30 [ 32.214420] do_mprotect_pkey+0x87e/0xd40 [ 32.214950] __x64_sys_mprotect+0x78/0xc0 [ 32.215476] do_syscall_64+0x3f/0x90 [ 32.215996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.216654] [ 32.216873] Freed by task 214: [ 32.217266] kasan_save_stack+0x22/0x50 [ 32.217769] kasan_set_track+0x25/0x30 [ 32.218269] kasan_save_free_info+0x2b/0x50 [ 32.218800] __kasan_slab_free+0x10a/0x190 [ 32.219341] kmem_cache_free+0x10d/0x4d0 [ 32.219888] rcu_core+0x8c8/0x2860 [ 32.220380] __do_softirq+0x1b7/0x7d4 [ 32.220858] [ 32.221079] Last potentially related work creation: [ 32.221670] kasan_save_stack+0x22/0x50 [ 32.222178] __kasan_record_aux_stack+0x8e/0xa0 [ 32.222758] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.223409] remove_vma+0x139/0x170 [ 32.223898] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.224481] do_vmi_munmap+0x1f1/0x2b0 [ 32.224977] __vm_munmap+0x138/0x3a0 [ 32.225460] __x64_sys_munmap+0x59/0x80 [ 32.225958] do_syscall_64+0x3f/0x90 [ 32.226430] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.227076] [ 32.227295] The buggy address belongs to the object at ffff88800ee67658 [ 32.227295] which belongs to the cache vm_area_struct of size 168 [ 32.228826] The buggy address is located 88 bytes inside of [ 32.228826] freed 168-byte region [ffff88800ee67658, ffff88800ee67700) [ 32.230237] [ 32.230461] The buggy address belongs to the physical page: [ 32.231166] page:00000000871b4b39 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee67 [ 32.232277] memcg:ffff88800f249201 [ 32.232703] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.233353] page_type: 0xffffffff() [ 32.233809] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.234777] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f249201 [ 32.235704] page dumped because: kasan: bad access detected [ 32.236387] [ 32.236601] Memory state around the buggy address: [ 32.237176] ffff88800ee67580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.238044] ffff88800ee67600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.238936] >ffff88800ee67680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.239788] ^ [ 32.240393] ffff88800ee67700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.241275] ffff88800ee67780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.242139] ================================================================== [ 32.243290] Disabling lock debugging due to kernel taint [ 34.252910] BUG: Bad rss-counter state mm:00000000da8e5b9e type:MM_FILEPAGES val:33 [ 34.253759] BUG: Bad rss-counter state mm:00000000da8e5b9e type:MM_ANONPAGES val:22 [ 34.821176] BUG: Bad rss-counter state mm:0000000063308a9b type:MM_FILEPAGES val:33 [ 34.822345] BUG: Bad rss-counter state mm:0000000063308a9b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44071' (ECDSA) to the list of known hosts. 2023/06/19 15:56:30 fuzzer started 2023/06/19 15:56:30 dialing manager at localhost:44161 2023/06/19 15:56:30 checking machine... 2023/06/19 15:56:30 checking revisions... [ 35.450502] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:56:30 testing simple program... [ 35.498878] cgroup: Unknown subsys name 'net' [ 35.545046] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:56:29 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f88d88ba520 CR3=000000001626c000 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=2039323a36353a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a36353a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001c5745f RBX=ffff88800e2ba2c8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e2ba2f8 RBP=ffff888016893d60 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff888016892d38 R14=ffffffff813782a8 R15=ffff88800ca00c00 RIP=ffffffff8184636c RFL=00000046 [---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 00007fe0b8fb3900 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=00007ffd25cd7000 CR3=000000000e1b0000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000