syzkaller login: [ 30.464572] BUG: Bad rss-counter state mm:00000000f97618c0 type:MM_FILEPAGES val:33 [ 30.465317] BUG: Bad rss-counter state mm:00000000f97618c0 type:MM_ANONPAGES val:22 [ 30.495009] ================================================================== [ 30.495640] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.496301] Read of size 8 at addr ffff88800d670228 by task sshd/218 [ 30.496834] [ 30.496981] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.497570] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.498294] Call Trace: [ 30.498518] [ 30.498881] dump_stack_lvl+0x91/0xf0 [ 30.499284] print_report+0xcc/0x620 [ 30.499609] ? __virt_addr_valid+0x102/0x340 [ 30.499985] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.500411] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.500843] kasan_report+0xbe/0xf0 [ 30.501189] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.501612] vma_interval_tree_remove+0xc75/0xec0 [ 30.502052] vma_prepare+0xc54/0x11a0 [ 30.502382] __split_vma+0x5af/0x950 [ 30.502708] ? __pfx___split_vma+0x10/0x10 [ 30.503095] ? find_held_lock+0x2c/0x110 [ 30.503461] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.503855] ? lock_is_held_type+0x9f/0x120 [ 30.504220] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.504636] ? mtree_range_walk+0x632/0x900 [ 30.505022] ? mas_walk+0x5c7/0x7c0 [ 30.505350] do_vmi_munmap+0x1f1/0x2b0 [ 30.505690] mmap_region+0x1f9/0x2660 [ 30.506071] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.506422] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.506916] ? __pfx_lock_acquire+0x10/0x10 [ 30.507300] ? __pfx_mmap_region+0x10/0x10 [ 30.507670] ? security_mmap_addr+0x7d/0xa0 [ 30.508038] ? get_unmapped_area+0x1f5/0x3f0 [ 30.508419] do_mmap+0x854/0xf00 [ 30.508733] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.509081] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.509464] ksys_mmap_pgoff+0x3af/0x500 [ 30.509848] do_syscall_64+0x3f/0x90 [ 30.510195] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.510651] RIP: 0033:0x7fe4bab49d82 [ 30.510969] 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 [ 30.512433] RSP: 002b:00007ffc87fcbbb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.513082] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe4bab49d82 [ 30.513665] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe4b9f83000 [ 30.514298] RBP: 00007fe4b9f83000 R08: 0000000000000009 R09: 0000000000001000 [ 30.514897] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556ee9f97f70 [ 30.515490] R13: 00007ffc87fcbbd0 R14: 00007ffc87fcbc00 R15: 00007ffc87fcbf60 [ 30.516078] [ 30.516276] [ 30.516429] Allocated by task 211: [ 30.516724] kasan_save_stack+0x22/0x50 [ 30.517088] kasan_set_track+0x25/0x30 [ 30.517428] __kasan_slab_alloc+0x59/0x70 [ 30.517821] kmem_cache_alloc+0x16b/0x370 [ 30.518176] vm_area_dup+0x20/0x160 [ 30.518490] __split_vma+0x170/0x950 [ 30.518809] split_vma+0xc6/0x110 [ 30.519123] mprotect_fixup+0x8d2/0xb30 [ 30.519481] do_mprotect_pkey+0x87e/0xd40 [ 30.519843] __x64_sys_mprotect+0x78/0xc0 [ 30.520209] do_syscall_64+0x3f/0x90 [ 30.520540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.520980] [ 30.521126] Freed by task 211: [ 30.521394] kasan_save_stack+0x22/0x50 [ 30.521767] kasan_set_track+0x25/0x30 [ 30.522123] kasan_save_free_info+0x2b/0x50 [ 30.522492] __kasan_slab_free+0x10a/0x190 [ 30.522859] kmem_cache_free+0x10d/0x4d0 [ 30.523216] rcu_core+0x8c8/0x2860 [ 30.523524] __do_softirq+0x1b7/0x7d4 [ 30.523860] [ 30.524017] Last potentially related work creation: [ 30.524429] kasan_save_stack+0x22/0x50 [ 30.524783] __kasan_record_aux_stack+0x8e/0xa0 [ 30.525173] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.525617] remove_vma+0x139/0x170 [ 30.525991] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.526377] do_vmi_munmap+0x1f1/0x2b0 [ 30.526711] __vm_munmap+0x138/0x3a0 [ 30.527039] __x64_sys_munmap+0x59/0x80 [ 30.527377] do_syscall_64+0x3f/0x90 [ 30.527710] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.528160] [ 30.528310] The buggy address belongs to the object at ffff88800d6701d0 [ 30.528310] which belongs to the cache vm_area_struct of size 168 [ 30.529325] The buggy address is located 88 bytes inside of [ 30.529325] freed 168-byte region [ffff88800d6701d0, ffff88800d670278) [ 30.530319] [ 30.530469] The buggy address belongs to the physical page: [ 30.530932] page:000000000396e99f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd670 [ 30.531669] memcg:ffff88800dd1fb01 [ 30.531963] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.532409] page_type: 0xffffffff() [ 30.532739] raw: 0100000000000200 ffff88800879fc80 ffffea00003579c0 dead000000000002 [ 30.533367] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd1fb01 [ 30.534041] page dumped because: kasan: bad access detected [ 30.534486] [ 30.534637] Memory state around the buggy address: [ 30.535047] ffff88800d670100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.535646] ffff88800d670180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.536240] >ffff88800d670200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.536824] ^ [ 30.537204] ffff88800d670280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.537811] ffff88800d670300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.538411] ================================================================== [ 30.539085] Disabling lock debugging due to kernel taint [ 32.093814] BUG: Bad rss-counter state mm:000000007704eb15 type:MM_FILEPAGES val:33 [ 32.094550] BUG: Bad rss-counter state mm:000000007704eb15 type:MM_ANONPAGES val:22 [ 32.472240] BUG: Bad rss-counter state mm:0000000004f74ee1 type:MM_FILEPAGES val:33 [ 32.472944] BUG: Bad rss-counter state mm:0000000004f74ee1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10962' (ECDSA) to the list of known hosts. 2023/06/20 08:32:48 fuzzer started 2023/06/20 08:32:48 dialing manager at localhost:44161 2023/06/20 08:32:48 checking machine... 2023/06/20 08:32:48 checking revisions... [ 33.065438] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:32:48 testing simple program... [ 33.102950] cgroup: Unknown subsys name 'net' [ 33.148849] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:32:46 Registers: info registers vcpu 0 RAX=1ffff11001c0b839 RBX=ffff88800e05c198 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e05c1c8 RBP=ffffe8ffffc0f408 RSP=ffff8880147a78c0 R8 =0000000000000001 R9 =ffffed10028f4f0c R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffffe8ffffc0f418 R14=0000000000000000 R15=0000000000000286 RIP=ffffffff8184636c 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 00007f3e0f936900 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=00007ffebeb059b8 CR3=000000000c64e000 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=00007f02cd7885100000557a7dbf9790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000002 RCX=00007ffa945323ff RDX=000055e16e26d788 RSI=0000000000000001 RDI=0000000000000000 RBP=0000000000000058 RSP=00007ffa940add18 R8 =0000000000000000 R9 =000055e16f78de88 R10=0000000000000000 R11=0000000000000000 R12=0000000000000001 R13=00007ffa8c000b80 R14=000055e16e26da50 R15=00007ffa94181840 RIP=000055e16e1f3037 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ffa940ae700 00000000 00000000 GS =0000 0000000000000000 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=00007f4abcfb4650 CR3=0000000018fd2000 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=32333a3830203032206e754a3e35333c XMM01=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303834 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000