syzkaller login: [ 30.127074] BUG: Bad rss-counter state mm:0000000092e3c374 type:MM_FILEPAGES val:33 [ 30.129378] BUG: Bad rss-counter state mm:0000000092e3c374 type:MM_ANONPAGES val:22 [ 30.296616] ================================================================== [ 30.297798] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.298970] Read of size 8 at addr ffff88801ad89a50 by task sshd/220 [ 30.299775] [ 30.299999] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.300959] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.302005] Call Trace: [ 30.302342] [ 30.302648] dump_stack_lvl+0x91/0xf0 [ 30.303156] print_report+0xcc/0x620 [ 30.303688] ? __virt_addr_valid+0x102/0x340 [ 30.304262] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.304918] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.305593] kasan_report+0xbe/0xf0 [ 30.306091] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.306761] vma_interval_tree_remove+0xc75/0xec0 [ 30.307384] vma_prepare+0xc54/0x11a0 [ 30.307892] __split_vma+0x5af/0x950 [ 30.308388] ? __pfx___split_vma+0x10/0x10 [ 30.308970] ? find_held_lock+0x2c/0x110 [ 30.309550] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.310142] ? lock_is_held_type+0x9f/0x120 [ 30.310721] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.311354] ? mtree_range_walk+0x632/0x900 [ 30.311944] ? mas_walk+0x5c7/0x7c0 [ 30.312450] do_vmi_munmap+0x1f1/0x2b0 [ 30.312977] mmap_region+0x1f9/0x2660 [ 30.313506] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.314057] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.314831] ? __pfx_lock_acquire+0x10/0x10 [ 30.315393] ? __pfx_mmap_region+0x10/0x10 [ 30.315963] ? security_mmap_addr+0x7d/0xa0 [ 30.316526] ? get_unmapped_area+0x1f5/0x3f0 [ 30.317098] do_mmap+0x854/0xf00 [ 30.317598] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.318119] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.318717] ksys_mmap_pgoff+0x3af/0x500 [ 30.319243] do_syscall_64+0x3f/0x90 [ 30.319753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.320438] RIP: 0033:0x7f935396fd82 [ 30.320937] 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 [ 30.323213] RSP: 002b:00007ffd8ea04be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.324180] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f935396fd82 [ 30.325080] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9352da9000 [ 30.326001] RBP: 00007f9352da9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.326918] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560c6d8edf70 [ 30.327819] R13: 00007ffd8ea04c00 R14: 00007ffd8ea04c30 R15: 00007ffd8ea04f90 [ 30.328730] [ 30.329039] [ 30.329263] Allocated by task 213: [ 30.329750] kasan_save_stack+0x22/0x50 [ 30.330284] kasan_set_track+0x25/0x30 [ 30.330834] __kasan_slab_alloc+0x59/0x70 [ 30.331387] kmem_cache_alloc+0x16b/0x370 [ 30.331990] vm_area_dup+0x20/0x160 [ 30.332576] __split_vma+0x170/0x950 [ 30.333175] split_vma+0xc6/0x110 [ 30.333757] mprotect_fixup+0x8d2/0xb30 [ 30.334397] do_mprotect_pkey+0x87e/0xd40 [ 30.335058] __x64_sys_mprotect+0x78/0xc0 [ 30.335617] do_syscall_64+0x3f/0x90 [ 30.336112] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.336802] [ 30.337025] Freed by task 213: [ 30.337439] kasan_save_stack+0x22/0x50 [ 30.337999] kasan_set_track+0x25/0x30 [ 30.338534] kasan_save_free_info+0x2b/0x50 [ 30.339096] __kasan_slab_free+0x10a/0x190 [ 30.339676] kmem_cache_free+0x10d/0x4d0 [ 30.340214] rcu_core+0x8c8/0x2860 [ 30.340698] __do_softirq+0x1b7/0x7d4 [ 30.341212] [ 30.341443] Last potentially related work creation: [ 30.342076] kasan_save_stack+0x22/0x50 [ 30.342618] __kasan_record_aux_stack+0x8e/0xa0 [ 30.343220] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.343920] remove_vma+0x139/0x170 [ 30.344391] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.344988] do_vmi_munmap+0x1f1/0x2b0 [ 30.345508] __vm_munmap+0x138/0x3a0 [ 30.346013] __x64_sys_munmap+0x59/0x80 [ 30.346553] do_syscall_64+0x3f/0x90 [ 30.347053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.347743] [ 30.347969] The buggy address belongs to the object at ffff88801ad899f8 [ 30.347969] which belongs to the cache vm_area_struct of size 168 [ 30.349557] The buggy address is located 88 bytes inside of [ 30.349557] freed 168-byte region [ffff88801ad899f8, ffff88801ad89aa0) [ 30.351040] [ 30.351265] The buggy address belongs to the physical page: [ 30.351982] page:0000000056e2c9bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ad89 [ 30.353138] memcg:ffff88800e3d6901 [ 30.353624] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.354291] page_type: 0xffffffff() [ 30.354767] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.355707] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3d6901 [ 30.356617] page dumped because: kasan: bad access detected [ 30.357278] [ 30.357519] Memory state around the buggy address: [ 30.358095] ffff88801ad89900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.358921] ffff88801ad89980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.359746] >ffff88801ad89a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.360576] ^ [ 30.361243] ffff88801ad89a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.362109] ffff88801ad89b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.362937] ================================================================== [ 30.363924] Disabling lock debugging due to kernel taint [ 33.135674] BUG: Bad rss-counter state mm:00000000dff74f60 type:MM_FILEPAGES val:33 [ 33.136750] BUG: Bad rss-counter state mm:00000000dff74f60 type:MM_ANONPAGES val:22 [ 33.621958] BUG: Bad rss-counter state mm:00000000cf475e78 type:MM_FILEPAGES val:33 [ 33.623175] BUG: Bad rss-counter state mm:00000000cf475e78 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24786' (ECDSA) to the list of known hosts. 2023/06/21 01:35:42 fuzzer started 2023/06/21 01:35:42 dialing manager at localhost:36067 2023/06/21 01:35:42 checking machine... 2023/06/21 01:35:42 checking revisions... [ 34.346491] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:35:42 testing simple program... [ 34.389383] cgroup: Unknown subsys name 'net' [ 34.433310] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:35:42 Registers: info registers vcpu 0 RAX=ffff888018d3f918 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888018d3f801 RSI=ffff888018d3f800 RDI=ffff888018d3f800 RBP=ffff888018d3f460 RSP=ffff888018d3f390 R8 =0000000000000001 R9 =ffff888018d3f448 R10=0000000000038001 R11=000000000003a4e3 R12=ffff888018d3f468 R13=ffff888018d3f450 R14=ffff888018d3f800 R15=ffff888018d3f408 RIP=ffffffff8112fbf3 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 00007ffb3f39b700 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=00007f0ccfeadcb0 CR3=000000000e622000 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=00000000000000000000000000000000 XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36333239352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363332 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007ffe9f5e1000 CR3=000000000e9ce000 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