syzkaller login: [ 29.482376] BUG: Bad rss-counter state mm:00000000b0f91e8c type:MM_FILEPAGES val:33 [ 29.484352] BUG: Bad rss-counter state mm:00000000b0f91e8c type:MM_ANONPAGES val:22 [ 29.653663] ================================================================== [ 29.654561] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.655496] Read of size 8 at addr ffff8880090b04e0 by task sshd/221 [ 29.656282] [ 29.656624] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.657483] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.658448] Call Trace: [ 29.658767] [ 29.659054] dump_stack_lvl+0x91/0xf0 [ 29.659546] print_report+0xcc/0x620 [ 29.660051] ? __virt_addr_valid+0x102/0x340 [ 29.660598] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.661203] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.661821] kasan_report+0xbe/0xf0 [ 29.662295] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.662920] vma_interval_tree_remove+0xc75/0xec0 [ 29.663516] vma_prepare+0xc54/0x11a0 [ 29.663999] __split_vma+0x5af/0x950 [ 29.664464] ? __pfx___split_vma+0x10/0x10 [ 29.664983] ? find_held_lock+0x2c/0x110 [ 29.665507] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.666064] ? lock_is_held_type+0x9f/0x120 [ 29.666599] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.667197] ? mtree_range_walk+0x632/0x900 [ 29.667749] ? mas_walk+0x5c7/0x7c0 [ 29.668230] do_vmi_munmap+0x1f1/0x2b0 [ 29.668720] mmap_region+0x1f9/0x2660 [ 29.669202] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.669714] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.670426] ? __pfx_lock_acquire+0x10/0x10 [ 29.670957] ? __pfx_mmap_region+0x10/0x10 [ 29.671485] ? security_mmap_addr+0x7d/0xa0 [ 29.672025] ? get_unmapped_area+0x1f5/0x3f0 [ 29.672566] do_mmap+0x854/0xf00 [ 29.672999] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.673494] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.674052] ksys_mmap_pgoff+0x3af/0x500 [ 29.674554] do_syscall_64+0x3f/0x90 [ 29.675029] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.675678] RIP: 0033:0x7fd36c191d82 [ 29.676142] 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 [ 29.678244] RSP: 002b:00007ffdd235f6c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.679145] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd36c191d82 [ 29.679999] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd36b5cb000 [ 29.680844] RBP: 00007fd36b5cb000 R08: 0000000000000009 R09: 0000000000001000 [ 29.681680] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bf6ae6eec0 [ 29.682515] R13: 00007ffdd235f6e0 R14: 00007ffdd235f710 R15: 00007ffdd235fa70 [ 29.683366] [ 29.683658] [ 29.683871] Allocated by task 214: [ 29.684309] kasan_save_stack+0x22/0x50 [ 29.684814] kasan_set_track+0x25/0x30 [ 29.685308] __kasan_slab_alloc+0x59/0x70 [ 29.685832] kmem_cache_alloc+0x16b/0x370 [ 29.686350] vm_area_dup+0x20/0x160 [ 29.686806] __split_vma+0x170/0x950 [ 29.687267] split_vma+0xc6/0x110 [ 29.687711] mprotect_fixup+0x8d2/0xb30 [ 29.688232] do_mprotect_pkey+0x87e/0xd40 [ 29.688751] __x64_sys_mprotect+0x78/0xc0 [ 29.689275] do_syscall_64+0x3f/0x90 [ 29.689750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.690389] [ 29.690606] Freed by task 214: [ 29.690992] kasan_save_stack+0x22/0x50 [ 29.691495] kasan_set_track+0x25/0x30 [ 29.691992] kasan_save_free_info+0x2b/0x50 [ 29.692518] __kasan_slab_free+0x10a/0x190 [ 29.693048] kmem_cache_free+0x10d/0x4d0 [ 29.693556] rcu_core+0x8c8/0x2860 [ 29.694000] __do_softirq+0x1b7/0x7d4 [ 29.694481] [ 29.694696] Last potentially related work creation: [ 29.695274] kasan_save_stack+0x22/0x50 [ 29.695770] __kasan_record_aux_stack+0x8e/0xa0 [ 29.696342] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.696984] remove_vma+0x139/0x170 [ 29.697436] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.697993] do_vmi_munmap+0x1f1/0x2b0 [ 29.698479] __vm_munmap+0x138/0x3a0 [ 29.698945] __x64_sys_munmap+0x59/0x80 [ 29.699433] do_syscall_64+0x3f/0x90 [ 29.699910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.700565] [ 29.700779] The buggy address belongs to the object at ffff8880090b0488 [ 29.700779] which belongs to the cache vm_area_struct of size 168 [ 29.702241] The buggy address is located 88 bytes inside of [ 29.702241] freed 168-byte region [ffff8880090b0488, ffff8880090b0530) [ 29.703633] [ 29.703850] The buggy address belongs to the physical page: [ 29.704511] page:0000000069838e10 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x90b0 [ 29.705580] memcg:ffff888009779401 [ 29.706003] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.706646] page_type: 0xffffffff() [ 29.707090] raw: 0100000000000200 ffff88800879fc80 ffffea000067d940 dead000000000004 [ 29.708017] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009779401 [ 29.708934] page dumped because: kasan: bad access detected [ 29.709613] [ 29.709818] Memory state around the buggy address: [ 29.710371] ffff8880090b0380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 29.711182] ffff8880090b0400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.711988] >ffff8880090b0480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.712786] ^ [ 29.713502] ffff8880090b0500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 29.714311] ffff8880090b0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.715109] ================================================================== [ 29.716371] Disabling lock debugging due to kernel taint [ 31.656305] BUG: Bad rss-counter state mm:000000003b900405 type:MM_FILEPAGES val:33 [ 31.657297] BUG: Bad rss-counter state mm:000000003b900405 type:MM_ANONPAGES val:22 [ 32.216714] BUG: Bad rss-counter state mm:00000000d5c3afd7 type:MM_FILEPAGES val:33 [ 32.217703] BUG: Bad rss-counter state mm:00000000d5c3afd7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37811' (ECDSA) to the list of known hosts. 2023/06/19 16:34:33 fuzzer started 2023/06/19 16:34:33 dialing manager at localhost:44161 2023/06/19 16:34:33 checking machine... 2023/06/19 16:34:33 checking revisions... [ 32.874375] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:34:33 testing simple program... [ 32.921097] cgroup: Unknown subsys name 'net' [ 32.968840] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:34:32 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007fa6d7466650 CR3=00000000103fa000 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=2032333a34333a3631203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a34333a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c09bcb RBX=ffffffff8604de5c RCX=ffffffff8450b64b RDX=0000000000000000 RSI=ffffffff864b1380 RDI=ffffffff8604de4c RBP=ffffffff8604de4c RSP=ffff88800c4bf460 R8 =ffffffff864b1380 R9 =ffff88800c4bf558 R10=0000000000038001 R11=00000000000b529e R12=ffffffff8604de6c R13=ffffffff8604de4c R14=ffffffff8604de4c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9a0796c900 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=00007f9a06dda980 CR3=000000000db1e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f90bee2a3841ad8500000000000ae988 XMM05=3e611f8795bf64f40000000000134d10 XMM06=c291bd5c70af25b90000000000133b00 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000