syzkaller login: [ 38.818445] BUG: Bad rss-counter state mm:00000000eb44a25a type:MM_FILEPAGES val:33 [ 38.819790] BUG: Bad rss-counter state mm:00000000eb44a25a type:MM_ANONPAGES val:22 [ 38.861325] ================================================================== [ 38.862235] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.863147] Read of size 8 at addr ffff88800e80c4e0 by task sshd/218 [ 38.863983] [ 38.864211] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.865090] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.866069] Call Trace: [ 38.866396] [ 38.866683] dump_stack_lvl+0x91/0xf0 [ 38.867170] print_report+0xcc/0x620 [ 38.867655] ? __virt_addr_valid+0x102/0x340 [ 38.868203] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.868823] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.869496] kasan_report+0xbe/0xf0 [ 38.870091] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.870864] vma_interval_tree_remove+0xc75/0xec0 [ 38.871614] vma_prepare+0xc54/0x11a0 [ 38.872208] __split_vma+0x5af/0x950 [ 38.872805] ? __pfx___split_vma+0x10/0x10 [ 38.873464] ? find_held_lock+0x2c/0x110 [ 38.874111] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.874804] ? lock_is_held_type+0x9f/0x120 [ 38.875474] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.876220] ? mtree_range_walk+0x632/0x900 [ 38.876922] ? mas_walk+0x5c7/0x7c0 [ 38.877526] do_vmi_munmap+0x1f1/0x2b0 [ 38.878136] mmap_region+0x1f9/0x2660 [ 38.878733] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.879371] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.880260] ? __pfx_lock_acquire+0x10/0x10 [ 38.880928] ? __pfx_mmap_region+0x10/0x10 [ 38.881577] ? security_mmap_addr+0x7d/0xa0 [ 38.882230] ? get_unmapped_area+0x1f5/0x3f0 [ 38.882912] do_mmap+0x854/0xf00 [ 38.883449] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.884065] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.884764] ksys_mmap_pgoff+0x3af/0x500 [ 38.885395] do_syscall_64+0x3f/0x90 [ 38.885987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.886782] RIP: 0033:0x7f1054abed82 [ 38.887343] 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 [ 38.889992] RSP: 002b:00007ffc597b1558 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.891107] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1054abed82 [ 38.892156] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1053ef8000 [ 38.893224] RBP: 00007f1053ef8000 R08: 0000000000000009 R09: 0000000000001000 [ 38.894274] R10: 0000000000000812 R11: 0000000000000206 R12: 00005612af908b20 [ 38.895361] R13: 00007ffc597b1570 R14: 00007ffc597b15a0 R15: 00007ffc597b1900 [ 38.896495] [ 38.896838] [ 38.897088] Allocated by task 211: [ 38.897591] kasan_save_stack+0x22/0x50 [ 38.898181] kasan_set_track+0x25/0x30 [ 38.898754] __kasan_slab_alloc+0x59/0x70 [ 38.899363] kmem_cache_alloc+0x16b/0x370 [ 38.899967] vm_area_dup+0x20/0x160 [ 38.900507] __split_vma+0x170/0x950 [ 38.901050] split_vma+0xc6/0x110 [ 38.901560] mprotect_fixup+0x8d2/0xb30 [ 38.902150] do_mprotect_pkey+0x87e/0xd40 [ 38.902758] __x64_sys_mprotect+0x78/0xc0 [ 38.903370] do_syscall_64+0x3f/0x90 [ 38.903924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.904602] [ 38.904810] Freed by task 211: [ 38.905180] kasan_save_stack+0x22/0x50 [ 38.905763] kasan_set_track+0x25/0x30 [ 38.906338] kasan_save_free_info+0x2b/0x50 [ 38.906962] __kasan_slab_free+0x10a/0x190 [ 38.907586] kmem_cache_free+0x10d/0x4d0 [ 38.908179] rcu_core+0x8c8/0x2860 [ 38.908711] __do_softirq+0x1b7/0x7d4 [ 38.909270] [ 38.909520] Last potentially related work creation: [ 38.910205] kasan_save_stack+0x22/0x50 [ 38.910792] __kasan_record_aux_stack+0x8e/0xa0 [ 38.911458] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.912210] remove_vma+0x139/0x170 [ 38.912745] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.913396] do_vmi_munmap+0x1f1/0x2b0 [ 38.913960] __vm_munmap+0x138/0x3a0 [ 38.914509] __x64_sys_munmap+0x59/0x80 [ 38.915090] do_syscall_64+0x3f/0x90 [ 38.915643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.916410] [ 38.916660] The buggy address belongs to the object at ffff88800e80c488 [ 38.916660] which belongs to the cache vm_area_struct of size 168 [ 38.918374] The buggy address is located 88 bytes inside of [ 38.918374] freed 168-byte region [ffff88800e80c488, ffff88800e80c530) [ 38.920018] [ 38.920270] The buggy address belongs to the physical page: [ 38.921050] page:000000006bd70579 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe80c [ 38.922310] memcg:ffff88800e051e01 [ 38.922808] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.923629] page_type: 0xffffffff() [ 38.924157] raw: 0100000000000200 ffff8880087a0c80 ffffea000036d8c0 dead000000000009 [ 38.925250] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e051e01 [ 38.926315] page dumped because: kasan: bad access detected [ 38.927084] [ 38.927335] Memory state around the buggy address: [ 38.928014] ffff88800e80c380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.929020] ffff88800e80c400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.930022] >ffff88800e80c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.931013] ^ [ 38.931893] ffff88800e80c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.932901] ffff88800e80c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.933898] ================================================================== [ 38.935157] Disabling lock debugging due to kernel taint [ 41.593412] BUG: Bad rss-counter state mm:0000000004bba19e type:MM_FILEPAGES val:33 [ 41.594428] BUG: Bad rss-counter state mm:0000000004bba19e type:MM_ANONPAGES val:22 [ 42.131343] BUG: Bad rss-counter state mm:000000008f11f66a type:MM_FILEPAGES val:33 [ 42.132691] BUG: Bad rss-counter state mm:000000008f11f66a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62688' (ECDSA) to the list of known hosts. 2023/06/20 17:40:41 fuzzer started 2023/06/20 17:40:41 dialing manager at localhost:36067 2023/06/20 17:40:42 checking machine... 2023/06/20 17:40:42 checking revisions... [ 42.835193] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:40:42 testing simple program... [ 42.876203] cgroup: Unknown subsys name 'net' [ 42.916674] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:40:41 Registers: info registers vcpu 0 RAX=ffff88801581fe20 RBX=ffff88801455e000 RCX=0000000000000000 RDX=ffff88801581fe48 RSI=0000000000000000 RDI=ffff88801581fe30 RBP=00007f6c8b8db000 RSP=ffff88801581fce8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000000000000000b R13=ffff88800f2ba540 R14=ffff88801455e000 R15=00007f6c8c0dafff RIP=ffffffff844a5485 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6c8c4f0900 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=00007f6c8b91c4c0 CR3=000000000cc9c000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5ee96f874ce3e80a00000000000ae988 XMM05=9f10a5f3dce6c3ea0000000000133328 XMM06=9e902004d54fb21e0000000000131928 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff888016fdf630 RCX=ffffffff860d8201 RDX=1ffff11002dfbed1 RSI=0000000000000000 RDI=ffffffff81846194 RBP=ffff888016fdf688 RSP=ffff888016fdf610 R8 =ffffffff860d825a R9 =ffff888016fdf670 R10=0000000000038001 R11=0000000000010b8d R12=ffff888016fdf6f8 R13=0000000000000000 R14=ffff888015aa1b40 R15=ffff8880093e7ab0 RIP=ffffffff811fc8a2 RFL=00000202 [-------] 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 00007f80adb64700 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=00007ffc6e298000 CR3=000000000c696000 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=2031343a30343a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a30343a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000