syzkaller login: [ 30.624764] BUG: Bad rss-counter state mm:00000000e289cc7b type:MM_FILEPAGES val:33 [ 30.625478] BUG: Bad rss-counter state mm:00000000e289cc7b type:MM_ANONPAGES val:22 [ 30.778572] ================================================================== [ 30.779492] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.780459] Read of size 8 at addr ffff888016a95a50 by task sshd/220 [ 30.781240] [ 30.781468] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.782505] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.783516] Call Trace: [ 30.783868] [ 30.784159] dump_stack_lvl+0x91/0xf0 [ 30.784660] print_report+0xcc/0x620 [ 30.785159] ? __virt_addr_valid+0x102/0x340 [ 30.785737] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.786356] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.786971] kasan_report+0xbe/0xf0 [ 30.787451] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.788085] vma_interval_tree_remove+0xc75/0xec0 [ 30.788685] vma_prepare+0xc54/0x11a0 [ 30.789158] __split_vma+0x5af/0x950 [ 30.789625] ? __pfx___split_vma+0x10/0x10 [ 30.790149] ? find_held_lock+0x2c/0x110 [ 30.790669] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.791228] ? lock_is_held_type+0x9f/0x120 [ 30.791769] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.792389] ? mtree_range_walk+0x632/0x900 [ 30.792947] ? mas_walk+0x5c7/0x7c0 [ 30.793426] do_vmi_munmap+0x1f1/0x2b0 [ 30.793917] mmap_region+0x1f9/0x2660 [ 30.794408] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.794914] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.795626] ? __pfx_lock_acquire+0x10/0x10 [ 30.796179] ? __pfx_mmap_region+0x10/0x10 [ 30.796708] ? security_mmap_addr+0x7d/0xa0 [ 30.797234] ? get_unmapped_area+0x1f5/0x3f0 [ 30.797783] do_mmap+0x854/0xf00 [ 30.798222] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.798720] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.799279] ksys_mmap_pgoff+0x3af/0x500 [ 30.799785] do_syscall_64+0x3f/0x90 [ 30.800269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.800917] RIP: 0033:0x7f04f345cd82 [ 30.801372] 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 [ 30.803500] RSP: 002b:00007ffde44b72f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.804426] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f04f345cd82 [ 30.805288] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f04f2896000 [ 30.806136] RBP: 00007f04f2896000 R08: 0000000000000009 R09: 0000000000001000 [ 30.806978] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e14a360b20 [ 30.807819] R13: 00007ffde44b7310 R14: 00007ffde44b7340 R15: 00007ffde44b76a0 [ 30.808694] [ 30.808985] [ 30.809203] Allocated by task 213: [ 30.809630] kasan_save_stack+0x22/0x50 [ 30.810132] kasan_set_track+0x25/0x30 [ 30.810653] __kasan_slab_alloc+0x59/0x70 [ 30.811191] kmem_cache_alloc+0x16b/0x370 [ 30.811712] vm_area_dup+0x20/0x160 [ 30.812171] __split_vma+0x170/0x950 [ 30.812636] split_vma+0xc6/0x110 [ 30.813080] mprotect_fixup+0x8d2/0xb30 [ 30.813590] do_mprotect_pkey+0x87e/0xd40 [ 30.814112] __x64_sys_mprotect+0x78/0xc0 [ 30.814632] do_syscall_64+0x3f/0x90 [ 30.815106] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.815743] [ 30.815975] Freed by task 213: [ 30.816364] kasan_save_stack+0x22/0x50 [ 30.816862] kasan_set_track+0x25/0x30 [ 30.817358] kasan_save_free_info+0x2b/0x50 [ 30.817887] __kasan_slab_free+0x10a/0x190 [ 30.818418] kmem_cache_free+0x10d/0x4d0 [ 30.818920] rcu_core+0x8c8/0x2860 [ 30.819369] __do_softirq+0x1b7/0x7d4 [ 30.819852] [ 30.820071] Last potentially related work creation: [ 30.820652] kasan_save_stack+0x22/0x50 [ 30.821152] __kasan_record_aux_stack+0x8e/0xa0 [ 30.821724] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.822370] remove_vma+0x139/0x170 [ 30.822825] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.823380] do_vmi_munmap+0x1f1/0x2b0 [ 30.823866] __vm_munmap+0x138/0x3a0 [ 30.824412] __x64_sys_munmap+0x59/0x80 [ 30.824904] do_syscall_64+0x3f/0x90 [ 30.825379] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.826018] [ 30.826234] The buggy address belongs to the object at ffff888016a959f8 [ 30.826234] which belongs to the cache vm_area_struct of size 168 [ 30.827689] The buggy address is located 88 bytes inside of [ 30.827689] freed 168-byte region [ffff888016a959f8, ffff888016a95aa0) [ 30.829108] [ 30.829326] The buggy address belongs to the physical page: [ 30.829992] page:00000000e6f271ee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a95 [ 30.831069] memcg:ffff88801465b701 [ 30.831496] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.832149] page_type: 0xffffffff() [ 30.832607] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.833512] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801465b701 [ 30.834407] page dumped because: kasan: bad access detected [ 30.835064] [ 30.835281] Memory state around the buggy address: [ 30.835862] ffff888016a95900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.836711] ffff888016a95980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.837564] >ffff888016a95a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.838413] ^ [ 30.839113] ffff888016a95a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.839975] ffff888016a95b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.840824] ================================================================== [ 30.841736] Disabling lock debugging due to kernel taint [ 33.224282] BUG: Bad rss-counter state mm:00000000d4669d8f type:MM_FILEPAGES val:33 [ 33.225267] BUG: Bad rss-counter state mm:00000000d4669d8f type:MM_ANONPAGES val:22 [ 33.807074] BUG: Bad rss-counter state mm:00000000e82a31e4 type:MM_FILEPAGES val:33 [ 33.808313] BUG: Bad rss-counter state mm:00000000e82a31e4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53983' (ECDSA) to the list of known hosts. 2023/06/21 03:32:56 fuzzer started 2023/06/21 03:32:56 dialing manager at localhost:36067 2023/06/21 03:32:56 checking machine... 2023/06/21 03:32:56 checking revisions... [ 34.468943] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:32:56 testing simple program... [ 34.519787] cgroup: Unknown subsys name 'net' [ 34.560128] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:32:56 Registers: info registers vcpu 0 RAX=1ffff11001b3d2d1 RBX=ffff88800d9e9658 RCX=1ffff11001b60bb6 RDX=dffffc0000000000 RSI=ffff88801928c2b0 RDI=ffff88800d9e9688 RBP=ffff8880099dd078 RSP=ffff88800efc75f8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88801928c178 R13=0000000000000000 R14=ffff88800e022048 R15=ffff88800e022000 RIP=ffffffff8184767e 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 00007fdedc22a900 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=00007fdedb6b87d0 CR3=000000000d85e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=337a531582ac7f6800000000000ae988 XMM05=7e6e20866df521af0000000000133018 XMM06=4fda316b135da52b0000000000131e08 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f1f900e7618 CR3=000000000e854000 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=2035353a32333a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a32333a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000