syzkaller login: [ 38.475612] BUG: Bad rss-counter state mm:000000004eaa99b9 type:MM_FILEPAGES val:33 [ 38.476294] BUG: Bad rss-counter state mm:000000004eaa99b9 type:MM_ANONPAGES val:22 [ 38.654213] ================================================================== [ 38.654807] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.655416] Read of size 8 at addr ffff88800db12968 by task sshd/219 [ 38.656073] [ 38.656216] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.656760] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.657375] Call Trace: [ 38.657577] <TASK> [ 38.657759] dump_stack_lvl+0x91/0xf0 [ 38.658078] print_report+0xcc/0x620 [ 38.658389] ? __virt_addr_valid+0x102/0x340 [ 38.658742] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.659139] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.659538] kasan_report+0xbe/0xf0 [ 38.659851] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.667735] vma_interval_tree_remove+0xc75/0xec0 [ 38.668114] vma_prepare+0xc54/0x11a0 [ 38.668418] __split_vma+0x5af/0x950 [ 38.668717] ? __pfx___split_vma+0x10/0x10 [ 38.669059] ? find_held_lock+0x2c/0x110 [ 38.669392] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.669751] ? lock_is_held_type+0x9f/0x120 [ 38.670094] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.670478] ? mtree_range_walk+0x632/0x900 [ 38.670837] ? mas_walk+0x5c7/0x7c0 [ 38.671136] do_vmi_munmap+0x1f1/0x2b0 [ 38.671449] mmap_region+0x1f9/0x2660 [ 38.671794] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.672122] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.672587] ? __pfx_lock_acquire+0x10/0x10 [ 38.672937] ? __pfx_mmap_region+0x10/0x10 [ 38.673274] ? security_mmap_addr+0x7d/0xa0 [ 38.673620] ? get_unmapped_area+0x1f5/0x3f0 [ 38.673975] do_mmap+0x854/0xf00 [ 38.674256] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.674573] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.674935] ksys_mmap_pgoff+0x3af/0x500 [ 38.675261] do_syscall_64+0x3f/0x90 [ 38.675580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.675999] RIP: 0033:0x7ff767928d82 [ 38.676291] 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 [ 38.677627] RSP: 002b:00007fffe61f74e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.678204] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff767928d82 [ 38.678738] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff766d62000 [ 38.679289] RBP: 00007ff766d62000 R08: 0000000000000009 R09: 0000000000001000 [ 38.679845] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f324208ec0 [ 38.680384] R13: 00007fffe61f7500 R14: 00007fffe61f7530 R15: 00007fffe61f7890 [ 38.680928] </TASK> [ 38.681112] [ 38.681247] Allocated by task 212: [ 38.681516] kasan_save_stack+0x22/0x50 [ 38.681841] kasan_set_track+0x25/0x30 [ 38.682160] __kasan_slab_alloc+0x59/0x70 [ 38.682492] kmem_cache_alloc+0x16b/0x370 [ 38.682823] vm_area_dup+0x20/0x160 [ 38.683113] __split_vma+0x170/0x950 [ 38.683410] split_vma+0xc6/0x110 [ 38.683713] mprotect_fixup+0x8d2/0xb30 [ 38.684040] do_mprotect_pkey+0x87e/0xd40 [ 38.684371] __x64_sys_mprotect+0x78/0xc0 [ 38.684708] do_syscall_64+0x3f/0x90 [ 38.685010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.685412] [ 38.685550] Freed by task 212: [ 38.685799] kasan_save_stack+0x22/0x50 [ 38.686122] kasan_set_track+0x25/0x30 [ 38.686434] kasan_save_free_info+0x2b/0x50 [ 38.686773] __kasan_slab_free+0x10a/0x190 [ 38.687112] kmem_cache_free+0x10d/0x4d0 [ 38.687421] rcu_core+0x8c8/0x2860 [ 38.687796] __do_softirq+0x1b7/0x7d4 [ 38.688101] [ 38.688242] Last potentially related work creation: [ 38.688611] kasan_save_stack+0x22/0x50 [ 38.688931] __kasan_record_aux_stack+0x8e/0xa0 [ 38.689294] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.689695] remove_vma+0x139/0x170 [ 38.689985] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.690335] do_vmi_munmap+0x1f1/0x2b0 [ 38.690644] __vm_munmap+0x138/0x3a0 [ 38.690940] __x64_sys_munmap+0x59/0x80 [ 38.691253] do_syscall_64+0x3f/0x90 [ 38.691576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.691992] [ 38.692130] The buggy address belongs to the object at ffff88800db12910 [ 38.692130] which belongs to the cache vm_area_struct of size 168 [ 38.693052] The buggy address is located 88 bytes inside of [ 38.693052] freed 168-byte region [ffff88800db12910, ffff88800db129b8) [ 38.693932] [ 38.694072] The buggy address belongs to the physical page: [ 38.694485] page:00000000d9ca825f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb12 [ 38.695170] memcg:ffff88800e100e01 [ 38.695437] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.695920] page_type: 0xffffffff() [ 38.696250] raw: 0100000000000200 ffff8880087a0c80 ffffea0000385480 dead000000000005 [ 38.696838] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e100e01 [ 38.697420] page dumped because: kasan: bad access detected [ 38.697818] [ 38.697952] Memory state around the buggy address: [ 38.698316] ffff88800db12800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.698857] ffff88800db12880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.699394] >ffff88800db12900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.703739] ^ [ 38.704250] ffff88800db12980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.704801] ffff88800db12a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.705353] ================================================================== [ 38.706150] Disabling lock debugging due to kernel taint [ 41.022200] BUG: Bad rss-counter state mm:0000000030824174 type:MM_FILEPAGES val:33 [ 41.022839] BUG: Bad rss-counter state mm:0000000030824174 type:MM_ANONPAGES val:22 [ 41.972170] BUG: Bad rss-counter state mm:00000000f23c2514 type:MM_FILEPAGES val:33 [ 41.974214] BUG: Bad rss-counter state mm:00000000f23c2514 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27223' (ECDSA) to the list of known hosts. 2023/06/21 09:59:59 fuzzer started 2023/06/21 09:59:59 dialing manager at localhost:36067 2023/06/21 09:59:59 checking machine... 2023/06/21 09:59:59 checking revisions... [ 42.904375] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:59:59 testing simple program... [ 42.965025] cgroup: Unknown subsys name 'net' [ 43.031609] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:59:59 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000046 [---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 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=00007fae47ab6328 CR3=0000000005482000 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=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 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=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=00007f2459e1fcc0 CR3=000000000d8f8000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=b28ece0c36e7f9b70000000000133bd8 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=f69bc9a8c337517900000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000