syzkaller login: [ 38.702176] BUG: Bad rss-counter state mm:0000000078a72be1 type:MM_FILEPAGES val:33 [ 38.703738] BUG: Bad rss-counter state mm:0000000078a72be1 type:MM_ANONPAGES val:22 [ 38.849599] ================================================================== [ 38.850537] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.851468] Read of size 8 at addr ffff88800e426798 by task sshd/219 [ 38.852232] [ 38.852520] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.853376] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.854371] Call Trace: [ 38.854691] [ 38.854973] dump_stack_lvl+0x91/0xf0 [ 38.855467] print_report+0xcc/0x620 [ 38.855954] ? __virt_addr_valid+0x102/0x340 [ 38.856505] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.857123] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.857734] kasan_report+0xbe/0xf0 [ 38.858225] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.858849] vma_interval_tree_remove+0xc75/0xec0 [ 38.859446] vma_prepare+0xc54/0x11a0 [ 38.859926] __split_vma+0x5af/0x950 [ 38.860398] ? __pfx___split_vma+0x10/0x10 [ 38.860921] ? find_held_lock+0x2c/0x110 [ 38.861439] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.862011] ? lock_is_held_type+0x9f/0x120 [ 38.862548] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.863147] ? mtree_range_walk+0x632/0x900 [ 38.863700] ? mas_walk+0x5c7/0x7c0 [ 38.864180] do_vmi_munmap+0x1f1/0x2b0 [ 38.864671] mmap_region+0x1f9/0x2660 [ 38.865155] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.865664] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.866397] ? __pfx_lock_acquire+0x10/0x10 [ 38.866930] ? __pfx_mmap_region+0x10/0x10 [ 38.867459] ? security_mmap_addr+0x7d/0xa0 [ 38.867988] ? get_unmapped_area+0x1f5/0x3f0 [ 38.868540] do_mmap+0x854/0xf00 [ 38.868975] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.869476] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.870055] ksys_mmap_pgoff+0x3af/0x500 [ 38.870562] do_syscall_64+0x3f/0x90 [ 38.871045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.871695] RIP: 0033:0x7f1865b34d82 [ 38.872155] 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 [ 38.874284] RSP: 002b:00007ffed59029d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.875206] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1865b34d82 [ 38.876052] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1864f6e000 [ 38.876903] RBP: 00007f1864f6e000 R08: 0000000000000009 R09: 0000000000001000 [ 38.877740] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d032115d90 [ 38.878614] R13: 00007ffed59029f0 R14: 00007ffed5902a20 R15: 00007ffed5902d80 [ 38.879474] [ 38.879766] [ 38.879983] Allocated by task 212: [ 38.880451] kasan_save_stack+0x22/0x50 [ 38.880984] kasan_set_track+0x25/0x30 [ 38.881474] __kasan_slab_alloc+0x59/0x70 [ 38.882004] kmem_cache_alloc+0x16b/0x370 [ 38.882522] vm_area_dup+0x20/0x160 [ 38.882978] __split_vma+0x170/0x950 [ 38.883446] split_vma+0xc6/0x110 [ 38.883886] mprotect_fixup+0x8d2/0xb30 [ 38.884391] do_mprotect_pkey+0x87e/0xd40 [ 38.884907] __x64_sys_mprotect+0x78/0xc0 [ 38.885434] do_syscall_64+0x3f/0x90 [ 38.885927] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.886615] [ 38.886833] Freed by task 203: [ 38.887225] kasan_save_stack+0x22/0x50 [ 38.887735] kasan_set_track+0x25/0x30 [ 38.888224] kasan_save_free_info+0x2b/0x50 [ 38.888769] __kasan_slab_free+0x10a/0x190 [ 38.889314] kmem_cache_free+0x10d/0x4d0 [ 38.889822] rcu_core+0x8c8/0x2860 [ 38.890278] __do_softirq+0x1b7/0x7d4 [ 38.890751] [ 38.890965] Last potentially related work creation: [ 38.891564] kasan_save_stack+0x22/0x50 [ 38.892062] __kasan_record_aux_stack+0x8e/0xa0 [ 38.892635] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.893271] remove_vma+0x139/0x170 [ 38.893724] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.894286] do_vmi_munmap+0x1f1/0x2b0 [ 38.894769] __vm_munmap+0x138/0x3a0 [ 38.895235] __x64_sys_munmap+0x59/0x80 [ 38.895729] do_syscall_64+0x3f/0x90 [ 38.896201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.896838] [ 38.897052] Second to last potentially related work creation: [ 38.897731] kasan_save_stack+0x22/0x50 [ 38.898261] __kasan_record_aux_stack+0x8e/0xa0 [ 38.898830] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.899471] remove_vma+0x139/0x170 [ 38.899921] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.900480] do_vmi_munmap+0x1f1/0x2b0 [ 38.900962] mmap_region+0x1f9/0x2660 [ 38.901441] do_mmap+0x854/0xf00 [ 38.901875] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.902377] ksys_mmap_pgoff+0x3af/0x500 [ 38.902874] do_syscall_64+0x3f/0x90 [ 38.903348] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.903995] [ 38.904211] The buggy address belongs to the object at ffff88800e426740 [ 38.904211] which belongs to the cache vm_area_struct of size 168 [ 38.905684] The buggy address is located 88 bytes inside of [ 38.905684] freed 168-byte region [ffff88800e426740, ffff88800e4267e8) [ 38.907117] [ 38.907337] The buggy address belongs to the physical page: [ 38.907998] page:0000000085d943c4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe426 [ 38.909094] memcg:ffff88800dd29e01 [ 38.909525] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.910238] page_type: 0xffffffff() [ 38.910689] raw: 0100000000000200 ffff8880087a0c80 ffffea00003530c0 dead000000000007 [ 38.911628] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd29e01 [ 38.912544] page dumped because: kasan: bad access detected [ 38.913215] [ 38.913429] Memory state around the buggy address: [ 38.914029] ffff88800e426680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.914892] ffff88800e426700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.915770] >ffff88800e426780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.916623] ^ [ 38.917119] ffff88800e426800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.917987] ffff88800e426880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.918837] ================================================================== [ 38.919984] Disabling lock debugging due to kernel taint [ 40.782193] BUG: Bad rss-counter state mm:000000005220dc9e type:MM_FILEPAGES val:33 [ 40.783382] BUG: Bad rss-counter state mm:000000005220dc9e type:MM_ANONPAGES val:22 [ 41.307764] BUG: Bad rss-counter state mm:000000001ef31992 type:MM_FILEPAGES val:33 [ 41.308920] BUG: Bad rss-counter state mm:000000001ef31992 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2415' (ECDSA) to the list of known hosts. 2023/06/21 03:30:38 fuzzer started 2023/06/21 03:30:38 dialing manager at localhost:36067 2023/06/21 03:30:38 checking machine... 2023/06/21 03:30:38 checking revisions... [ 41.953807] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:30:38 testing simple program... [ 42.007397] cgroup: Unknown subsys name 'net' [ 42.050597] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:30:38 Registers: info registers vcpu 0 RAX=ffff888009095ec0 RBX=ffff888009095ec0 RCX=ffff888009095000 RDX=0000000000000000 RSI=0000000000000130 RDI=ffffea0000242540 RBP=0000000000000000 RSP=ffff88800d8679d0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6a61 R12=ffff88800844f780 R13=ffffea00003cb900 R14=ffffffff83675648 R15=0000000000000001 RIP=ffffffff8180efab RFL=00000286 [--S--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 00007f4ea3281900 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=00007ffdeec90000 CR3=000000001c836000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e1355 RSI=ffff888008e07f50 RDI=ffff88806cf09aa8 RBP=ffff888008e07f50 RSP=ffff88806cf099f0 R8 =ffffffff86091f88 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000506a R12=0000000000000008 R13=ffff888008e00000 R14=ffff888008e07f58 R15=ffff88806cf09a98 RIP=ffffffff81130468 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=00007f4671194530 CR3=00000000145fa000 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=1a18a09ed89274953b4ea724241d10f2 XMM02=000000000011be30ec2efd57dc4c00df XMM03=00000000001220589229d0e36bd0c704 XMM04=fdc32d7ac73d0dbd00000000000ae988 XMM05=dfcdbad4f1609c370000000000132fd8 XMM06=65386433a544e4ba0000000000132190 XMM07=e042d86d42eb936e0000000000122330 XMM08=9229d0e36bd0c704000000000011be90 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000