syzkaller login: [ 30.342043] BUG: Bad rss-counter state mm:000000009eb33d64 type:MM_FILEPAGES val:33 [ 30.343241] BUG: Bad rss-counter state mm:000000009eb33d64 type:MM_ANONPAGES val:22 [ 30.446532] ================================================================== [ 30.447617] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.448721] Read of size 8 at addr ffff88800ba02968 by task sshd/219 [ 30.449888] [ 30.450073] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.450572] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.451143] Call Trace: [ 30.451329] [ 30.451518] dump_stack_lvl+0x91/0xf0 [ 30.451808] print_report+0xcc/0x620 [ 30.452096] ? __virt_addr_valid+0x102/0x340 [ 30.452417] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.452779] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.453135] kasan_report+0xbe/0xf0 [ 30.453412] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.453780] vma_interval_tree_remove+0xc75/0xec0 [ 30.454130] vma_prepare+0xc54/0x11a0 [ 30.454413] __split_vma+0x5af/0x950 [ 30.454685] ? __pfx___split_vma+0x10/0x10 [ 30.454993] ? find_held_lock+0x2c/0x110 [ 30.455300] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.455628] ? lock_is_held_type+0x9f/0x120 [ 30.455943] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.456312] ? mtree_range_walk+0x632/0x900 [ 30.456649] ? mas_walk+0x5c7/0x7c0 [ 30.456931] do_vmi_munmap+0x1f1/0x2b0 [ 30.457234] mmap_region+0x1f9/0x2660 [ 30.457526] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.457860] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.458311] ? __pfx_lock_acquire+0x10/0x10 [ 30.458643] ? __pfx_mmap_region+0x10/0x10 [ 30.458965] ? security_mmap_addr+0x7d/0xa0 [ 30.459298] ? get_unmapped_area+0x1f5/0x3f0 [ 30.459634] do_mmap+0x854/0xf00 [ 30.459897] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.460202] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.460549] ksys_mmap_pgoff+0x3af/0x500 [ 30.460864] do_syscall_64+0x3f/0x90 [ 30.461167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.461577] RIP: 0033:0x7f99db1ecd82 [ 30.461859] 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 [ 30.463179] RSP: 002b:00007ffdf24662d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.463743] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f99db1ecd82 [ 30.464271] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f99da626000 [ 30.464796] RBP: 00007f99da626000 R08: 0000000000000009 R09: 0000000000001000 [ 30.465320] R10: 0000000000000812 R11: 0000000000000206 R12: 00005625817f7ec0 [ 30.465852] R13: 00007ffdf24662f0 R14: 00007ffdf2466320 R15: 00007ffdf2466680 [ 30.466386] [ 30.466564] [ 30.466696] Allocated by task 212: [ 30.466965] kasan_save_stack+0x22/0x50 [ 30.467271] kasan_set_track+0x25/0x30 [ 30.467582] __kasan_slab_alloc+0x59/0x70 [ 30.467900] kmem_cache_alloc+0x16b/0x370 [ 30.468222] vm_area_dup+0x20/0x160 [ 30.468499] __split_vma+0x170/0x950 [ 30.468782] split_vma+0xc6/0x110 [ 30.469053] mprotect_fixup+0x8d2/0xb30 [ 30.469359] do_mprotect_pkey+0x87e/0xd40 [ 30.469691] __x64_sys_mprotect+0x78/0xc0 [ 30.470011] do_syscall_64+0x3f/0x90 [ 30.470297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.470692] [ 30.470828] Freed by task 212: [ 30.471068] kasan_save_stack+0x22/0x50 [ 30.471383] kasan_set_track+0x25/0x30 [ 30.471680] kasan_save_free_info+0x2b/0x50 [ 30.472007] __kasan_slab_free+0x10a/0x190 [ 30.472328] kmem_cache_free+0x10d/0x4d0 [ 30.472645] rcu_core+0x8c8/0x2860 [ 30.472914] __do_softirq+0x1b7/0x7d4 [ 30.473208] [ 30.473340] Last potentially related work creation: [ 30.473708] kasan_save_stack+0x22/0x50 [ 30.474015] __kasan_record_aux_stack+0x8e/0xa0 [ 30.474376] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.474777] remove_vma+0x139/0x170 [ 30.475056] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.475394] do_vmi_munmap+0x1f1/0x2b0 [ 30.475693] __vm_munmap+0x138/0x3a0 [ 30.475988] __x64_sys_munmap+0x59/0x80 [ 30.476298] do_syscall_64+0x3f/0x90 [ 30.476591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.476987] [ 30.477122] The buggy address belongs to the object at ffff88800ba02910 [ 30.477122] which belongs to the cache vm_area_struct of size 168 [ 30.478046] The buggy address is located 88 bytes inside of [ 30.478046] freed 168-byte region [ffff88800ba02910, ffff88800ba029b8) [ 30.478930] [ 30.479066] The buggy address belongs to the physical page: [ 30.479474] page:00000000602c8c0b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xba02 [ 30.480142] memcg:ffff888019cddb01 [ 30.480404] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.480810] page_type: 0xffffffff() [ 30.481090] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.481665] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019cddb01 [ 30.482229] page dumped because: kasan: bad access detected [ 30.482636] [ 30.482765] Memory state around the buggy address: [ 30.483119] ffff88800ba02800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.483656] ffff88800ba02880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.484186] >ffff88800ba02900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.484708] ^ [ 30.485193] ffff88800ba02980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.485738] ffff88800ba02a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.486263] ================================================================== [ 30.486827] Disabling lock debugging due to kernel taint [ 32.285965] BUG: Bad rss-counter state mm:00000000ecf1d595 type:MM_FILEPAGES val:33 [ 32.286714] BUG: Bad rss-counter state mm:00000000ecf1d595 type:MM_ANONPAGES val:22 [ 32.653673] BUG: Bad rss-counter state mm:0000000011d9cf0d type:MM_FILEPAGES val:33 [ 32.655047] BUG: Bad rss-counter state mm:0000000011d9cf0d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25011' (ECDSA) to the list of known hosts. 2023/06/20 18:54:48 fuzzer started 2023/06/20 18:54:48 dialing manager at localhost:36067 2023/06/20 18:54:48 checking machine... 2023/06/20 18:54:48 checking revisions... [ 33.343850] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:54:49 testing simple program... [ 33.393259] cgroup: Unknown subsys name 'net' [ 33.429472] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:54:48 Registers: info registers vcpu 0 RAX=ffffc90000660000 RBX=ffff88800f3f9040 RCX=0000000000000000 RDX=1ffff11001e7f208 RSI=ffffffff83031c19 RDI=0000000000000005 RBP=0000000008350000 RSP=ffff88800f477ae8 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000005 R11=ffff88800f3f9178 R12=0000000000000005 R13=0000000000000000 R14=ffff88800f3f8000 R15=ffff88800f3f9058 RIP=ffffffff83031c43 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 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=00007fca66b4e280 CR3=000000000c65c000 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=34353a3831203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732038343a3435 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343234 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=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880166a51c0 RSI=ffffffff817650e5 RDI=0000000000000007 RBP=ffffea00006af580 RSP=ffff88800f247910 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffea00006af548 R13=ffff8880095f6658 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff814c089b 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 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=00007f3983732328 CR3=000000000dfc4000 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=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