syzkaller login: [ 30.940008] BUG: Bad rss-counter state mm:0000000004312804 type:MM_FILEPAGES val:33 [ 30.941508] BUG: Bad rss-counter state mm:0000000004312804 type:MM_ANONPAGES val:22 [ 31.088687] ================================================================== [ 31.089624] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.090566] Read of size 8 at addr ffff88800e01d140 by task sshd/219 [ 31.091335] [ 31.091557] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.092446] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.093421] Call Trace: [ 31.093764] [ 31.094058] dump_stack_lvl+0x91/0xf0 [ 31.094554] print_report+0xcc/0x620 [ 31.095038] ? __virt_addr_valid+0x102/0x340 [ 31.095594] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.096265] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.096897] kasan_report+0xbe/0xf0 [ 31.097385] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.098038] vma_interval_tree_remove+0xc75/0xec0 [ 31.098668] vma_prepare+0xc54/0x11a0 [ 31.099153] __split_vma+0x5af/0x950 [ 31.099628] ? __pfx___split_vma+0x10/0x10 [ 31.100159] ? find_held_lock+0x2c/0x110 [ 31.100687] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.101267] ? lock_is_held_type+0x9f/0x120 [ 31.101827] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.102442] ? mtree_range_walk+0x632/0x900 [ 31.102997] ? mas_walk+0x5c7/0x7c0 [ 31.103479] do_vmi_munmap+0x1f1/0x2b0 [ 31.103977] mmap_region+0x1f9/0x2660 [ 31.104461] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.104977] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.105692] ? __pfx_lock_acquire+0x10/0x10 [ 31.106244] ? __pfx_mmap_region+0x10/0x10 [ 31.106775] ? security_mmap_addr+0x7d/0xa0 [ 31.107309] ? get_unmapped_area+0x1f5/0x3f0 [ 31.107865] do_mmap+0x854/0xf00 [ 31.108309] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.108804] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.109380] ksys_mmap_pgoff+0x3af/0x500 [ 31.109913] do_syscall_64+0x3f/0x90 [ 31.110401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.111070] RIP: 0033:0x7f302a648d82 [ 31.111538] 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 [ 31.113697] RSP: 002b:00007ffd57b324b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.114625] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f302a648d82 [ 31.115493] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3029a82000 [ 31.116365] RBP: 00007f3029a82000 R08: 0000000000000009 R09: 0000000000001000 [ 31.117221] R10: 0000000000000812 R11: 0000000000000206 R12: 00005562c7781d90 [ 31.118090] R13: 00007ffd57b324d0 R14: 00007ffd57b32500 R15: 00007ffd57b32860 [ 31.118969] [ 31.119262] [ 31.119483] Allocated by task 212: [ 31.119912] kasan_save_stack+0x22/0x50 [ 31.120418] kasan_set_track+0x25/0x30 [ 31.120915] __kasan_slab_alloc+0x59/0x70 [ 31.121437] kmem_cache_alloc+0x16b/0x370 [ 31.121987] vm_area_dup+0x20/0x160 [ 31.122444] __split_vma+0x170/0x950 [ 31.122913] split_vma+0xc6/0x110 [ 31.123356] mprotect_fixup+0x8d2/0xb30 [ 31.123861] do_mprotect_pkey+0x87e/0xd40 [ 31.124383] __x64_sys_mprotect+0x78/0xc0 [ 31.124907] do_syscall_64+0x3f/0x90 [ 31.125386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.126035] [ 31.126255] Freed by task 13: [ 31.126653] kasan_save_stack+0x22/0x50 [ 31.127176] kasan_set_track+0x25/0x30 [ 31.127683] kasan_save_free_info+0x2b/0x50 [ 31.128223] __kasan_slab_free+0x10a/0x190 [ 31.128766] kmem_cache_free+0x10d/0x4d0 [ 31.129284] rcu_core+0x8c8/0x2860 [ 31.129750] __do_softirq+0x1b7/0x7d4 [ 31.130237] [ 31.130450] Last potentially related work creation: [ 31.131038] kasan_save_stack+0x22/0x50 [ 31.131543] __kasan_record_aux_stack+0x8e/0xa0 [ 31.132122] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.132772] remove_vma+0x139/0x170 [ 31.133233] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.133802] do_vmi_munmap+0x1f1/0x2b0 [ 31.134287] __vm_munmap+0x138/0x3a0 [ 31.134758] __x64_sys_munmap+0x59/0x80 [ 31.135259] do_syscall_64+0x3f/0x90 [ 31.135738] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.136382] [ 31.136599] The buggy address belongs to the object at ffff88800e01d0e8 [ 31.136599] which belongs to the cache vm_area_struct of size 168 [ 31.138081] The buggy address is located 88 bytes inside of [ 31.138081] freed 168-byte region [ffff88800e01d0e8, ffff88800e01d190) [ 31.139490] [ 31.139710] The buggy address belongs to the physical page: [ 31.140380] page:000000008a8bbbc4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe01d [ 31.141458] memcg:ffff88800ded1d01 [ 31.141919] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.142616] page_type: 0xffffffff() [ 31.143062] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.143977] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ded1d01 [ 31.144887] page dumped because: kasan: bad access detected [ 31.145540] [ 31.145763] Memory state around the buggy address: [ 31.146345] ffff88800e01d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.147214] ffff88800e01d080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.148066] >ffff88800e01d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.148909] ^ [ 31.149547] ffff88800e01d180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.150398] ffff88800e01d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.151239] ================================================================== [ 31.152208] Disabling lock debugging due to kernel taint [ 32.899750] BUG: Bad rss-counter state mm:00000000d443292f type:MM_FILEPAGES val:33 [ 32.900429] BUG: Bad rss-counter state mm:00000000d443292f type:MM_ANONPAGES val:22 [ 33.266757] BUG: Bad rss-counter state mm:0000000041bcdfc3 type:MM_FILEPAGES val:33 [ 33.267531] BUG: Bad rss-counter state mm:0000000041bcdfc3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16087' (ECDSA) to the list of known hosts. 2023/06/20 17:50:30 fuzzer started 2023/06/20 17:50:31 dialing manager at localhost:36067 2023/06/20 17:50:31 checking machine... 2023/06/20 17:50:31 checking revisions... [ 33.886647] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:50:31 testing simple program... [ 33.924389] cgroup: Unknown subsys name 'net' [ 33.959929] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:50:30 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864abb34 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888016f471b0 RSP=ffff888016f470e8 R8 =ffffffff864abb38 R9 =ffff888016f47198 R10=0000000000038001 R11=00000000000b3fb2 R12=ffff888016f471b8 R13=ffff888016f471a0 R14=ffff888016f47b10 R15=ffff888016f47158 RIP=ffffffff81130bb0 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 00007f3e3d3af900 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=00007f3e3d354008 CR3=00000000162b0000 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=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f706507d5a0 CR3=0000000015cee000 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=2030333a30353a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a30353a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000