syzkaller login: [ 28.708555] BUG: Bad rss-counter state mm:00000000eee13f32 type:MM_FILEPAGES val:33 [ 28.709966] BUG: Bad rss-counter state mm:00000000eee13f32 type:MM_ANONPAGES val:22 [ 28.862048] ================================================================== [ 28.863096] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.864418] Read of size 8 at addr ffff88801982d4e0 by task sshd/221 [ 28.865340] [ 28.865635] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.866589] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.867898] Call Trace: [ 28.868337] [ 28.868639] dump_stack_lvl+0x91/0xf0 [ 28.869283] print_report+0xcc/0x620 [ 28.869846] ? __virt_addr_valid+0x102/0x340 [ 28.870544] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.871345] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.872093] kasan_report+0xbe/0xf0 [ 28.872650] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.873373] vma_interval_tree_remove+0xc75/0xec0 [ 28.874208] vma_prepare+0xc54/0x11a0 [ 28.874862] __split_vma+0x5af/0x950 [ 28.875459] ? __pfx___split_vma+0x10/0x10 [ 28.876193] ? find_held_lock+0x2c/0x110 [ 28.876865] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.877568] ? lock_is_held_type+0x9f/0x120 [ 28.878204] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.878942] ? mtree_range_walk+0x632/0x900 [ 28.879667] ? mas_walk+0x5c7/0x7c0 [ 28.880209] do_vmi_munmap+0x1f1/0x2b0 [ 28.880723] mmap_region+0x1f9/0x2660 [ 28.881383] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.882031] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.882933] ? __pfx_lock_acquire+0x10/0x10 [ 28.883602] ? __pfx_mmap_region+0x10/0x10 [ 28.884326] ? security_mmap_addr+0x7d/0xa0 [ 28.884915] ? get_unmapped_area+0x1f5/0x3f0 [ 28.885626] do_mmap+0x854/0xf00 [ 28.886191] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.886764] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.887383] ksys_mmap_pgoff+0x3af/0x500 [ 28.888110] do_syscall_64+0x3f/0x90 [ 28.888666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.889493] RIP: 0033:0x7feb6c7c8d82 [ 28.890025] 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 [ 28.892729] RSP: 002b:00007ffeb3f63f58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.893702] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feb6c7c8d82 [ 28.894767] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feb6bc02000 [ 28.895814] RBP: 00007feb6bc02000 R08: 0000000000000009 R09: 0000000000001000 [ 28.896845] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed8e2bfd90 [ 28.897874] R13: 00007ffeb3f63f70 R14: 00007ffeb3f63fa0 R15: 00007ffeb3f64300 [ 28.898950] [ 28.899353] [ 28.899657] Allocated by task 213: [ 28.900114] kasan_save_stack+0x22/0x50 [ 28.900702] kasan_set_track+0x25/0x30 [ 28.901376] __kasan_slab_alloc+0x59/0x70 [ 28.901965] kmem_cache_alloc+0x16b/0x370 [ 28.902648] vm_area_dup+0x20/0x160 [ 28.903167] __split_vma+0x170/0x950 [ 28.903785] split_vma+0xc6/0x110 [ 28.904292] mprotect_fixup+0x8d2/0xb30 [ 28.904928] do_mprotect_pkey+0x87e/0xd40 [ 28.905585] __x64_sys_mprotect+0x78/0xc0 [ 28.906289] do_syscall_64+0x3f/0x90 [ 28.906778] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.907638] [ 28.907868] Freed by task 213: [ 28.908272] kasan_save_stack+0x22/0x50 [ 28.908798] kasan_set_track+0x25/0x30 [ 28.909312] kasan_save_free_info+0x2b/0x50 [ 28.909861] __kasan_slab_free+0x10a/0x190 [ 28.910407] kmem_cache_free+0x10d/0x4d0 [ 28.910927] rcu_core+0x8c8/0x2860 [ 28.911376] __do_softirq+0x1b7/0x7d4 [ 28.911868] [ 28.912087] Last potentially related work creation: [ 28.912682] kasan_save_stack+0x22/0x50 [ 28.913199] __kasan_record_aux_stack+0x8e/0xa0 [ 28.913783] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.914442] remove_vma+0x139/0x170 [ 28.914907] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.915492] do_vmi_munmap+0x1f1/0x2b0 [ 28.916019] __vm_munmap+0x138/0x3a0 [ 28.916504] __x64_sys_munmap+0x59/0x80 [ 28.917004] do_syscall_64+0x3f/0x90 [ 28.917495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.918147] [ 28.918369] The buggy address belongs to the object at ffff88801982d488 [ 28.918369] which belongs to the cache vm_area_struct of size 168 [ 28.919870] The buggy address is located 88 bytes inside of [ 28.919870] freed 168-byte region [ffff88801982d488, ffff88801982d530) [ 28.921298] [ 28.921517] The buggy address belongs to the physical page: [ 28.922184] page:000000007eedd0f9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1982d [ 28.923322] memcg:ffff88800eac6f01 [ 28.923775] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.924512] page_type: 0xffffffff() [ 28.924965] raw: 0100000000000200 ffff8880087a0c80 ffffea00003877c0 dead000000000003 [ 28.925928] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eac6f01 [ 28.926836] page dumped because: kasan: bad access detected [ 28.927548] [ 28.927766] Memory state around the buggy address: [ 28.928366] ffff88801982d380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.929233] ffff88801982d400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 28.930094] >ffff88801982d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.930937] ^ [ 28.931693] ffff88801982d500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 28.932551] ffff88801982d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.933402] ================================================================== [ 28.934603] Disabling lock debugging due to kernel taint [ 31.685053] BUG: Bad rss-counter state mm:000000003a457350 type:MM_FILEPAGES val:33 [ 31.685929] BUG: Bad rss-counter state mm:000000003a457350 type:MM_ANONPAGES val:22 [ 32.302035] BUG: Bad rss-counter state mm:00000000d4c9f17e type:MM_FILEPAGES val:33 [ 32.303251] BUG: Bad rss-counter state mm:00000000d4c9f17e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14872' (ECDSA) to the list of known hosts. 2023/06/21 02:11:50 fuzzer started 2023/06/21 02:11:51 dialing manager at localhost:36067 2023/06/21 02:11:51 checking machine... 2023/06/21 02:11:51 checking revisions... [ 32.964573] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:11:51 testing simple program... [ 33.016871] cgroup: Unknown subsys name 'net' [ 33.055882] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:11:50 Registers: info registers vcpu 0 RAX=ffffffff8363d510 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=ffffffffffffffff RSI=0000000000000000 RDI=ffff888016557f58 RBP=ffff888016557f48 RSP=ffff888016557f38 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff888016557f58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8363d514 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 00007f6ac6739900 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=0000559b6f045768 CR3=000000000ef0a000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0100000000010200 RBX=0000000000000cc0 RCX=ffffffff8364429f RDX=00000000ffffffff RSI=00000000ffffffff RDI=ffff88800b9f1c80 RBP=ffff888016557cc0 RSP=ffff888016557c00 R8 =ffffe8ffffd01a50 R9 =0000000000000780 R10=ffff888016557ce0 R11=00000000000b6a61 R12=ffff88800b9f1c80 R13=ffff8880167d8500 R14=0000000000000000 R15=ffffe8ffffd01a50 RIP=ffffffff81806dc3 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 00007f6ac6739900 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=00007f6ac6cee650 CR3=000000000ef0a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000