syzkaller login: [ 30.707836] BUG: Bad rss-counter state mm:000000007f281581 type:MM_FILEPAGES val:33 [ 30.709001] BUG: Bad rss-counter state mm:000000007f281581 type:MM_ANONPAGES val:22 [ 30.749490] ================================================================== [ 30.750385] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.751303] Read of size 8 at addr ffff88801681a6b0 by task sshd/220 [ 30.752127] [ 30.752337] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.753177] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.754135] Call Trace: [ 30.754438] [ 30.754730] dump_stack_lvl+0x91/0xf0 [ 30.755211] print_report+0xcc/0x620 [ 30.755691] ? __virt_addr_valid+0x102/0x340 [ 30.756215] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.756844] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.757449] kasan_report+0xbe/0xf0 [ 30.757953] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.758582] vma_interval_tree_remove+0xc75/0xec0 [ 30.759211] vma_prepare+0xc54/0x11a0 [ 30.759706] __split_vma+0x5af/0x950 [ 30.760182] ? __pfx___split_vma+0x10/0x10 [ 30.760730] ? find_held_lock+0x2c/0x110 [ 30.761261] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.761856] ? lock_is_held_type+0x9f/0x120 [ 30.762398] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.763021] ? mtree_range_walk+0x632/0x900 [ 30.763602] ? mas_walk+0x5c7/0x7c0 [ 30.764100] do_vmi_munmap+0x1f1/0x2b0 [ 30.764588] mmap_region+0x1f9/0x2660 [ 30.765078] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.765591] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.766326] ? __pfx_lock_acquire+0x10/0x10 [ 30.766880] ? __pfx_mmap_region+0x10/0x10 [ 30.767420] ? security_mmap_addr+0x7d/0xa0 [ 30.767969] ? get_unmapped_area+0x1f5/0x3f0 [ 30.768515] do_mmap+0x854/0xf00 [ 30.768980] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.769477] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.770082] ksys_mmap_pgoff+0x3af/0x500 [ 30.770593] do_syscall_64+0x3f/0x90 [ 30.771091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.771781] RIP: 0033:0x7f8b9c298d82 [ 30.772249] 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 [ 30.774414] RSP: 002b:00007fff9ca95448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.775349] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8b9c298d82 [ 30.776198] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8b9b6d2000 [ 30.777068] RBP: 00007f8b9b6d2000 R08: 0000000000000009 R09: 0000000000001000 [ 30.777952] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558a96043d90 [ 30.778822] R13: 00007fff9ca95460 R14: 00007fff9ca95490 R15: 00007fff9ca957f0 [ 30.779710] [ 30.780001] [ 30.780211] Allocated by task 213: [ 30.780657] kasan_save_stack+0x22/0x50 [ 30.781166] kasan_set_track+0x25/0x30 [ 30.781680] __kasan_slab_alloc+0x59/0x70 [ 30.782211] kmem_cache_alloc+0x16b/0x370 [ 30.782747] vm_area_dup+0x20/0x160 [ 30.783235] __split_vma+0x170/0x950 [ 30.783719] split_vma+0xc6/0x110 [ 30.784162] mprotect_fixup+0x8d2/0xb30 [ 30.784686] do_mprotect_pkey+0x87e/0xd40 [ 30.785209] __x64_sys_mprotect+0x78/0xc0 [ 30.785772] do_syscall_64+0x3f/0x90 [ 30.786255] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.786912] [ 30.787126] Freed by task 213: [ 30.787532] kasan_save_stack+0x22/0x50 [ 30.788046] kasan_set_track+0x25/0x30 [ 30.788538] kasan_save_free_info+0x2b/0x50 [ 30.789082] __kasan_slab_free+0x10a/0x190 [ 30.789622] kmem_cache_free+0x10d/0x4d0 [ 30.790154] rcu_core+0x8c8/0x2860 [ 30.790602] __do_softirq+0x1b7/0x7d4 [ 30.791104] [ 30.791354] Last potentially related work creation: [ 30.791958] kasan_save_stack+0x22/0x50 [ 30.792456] __kasan_record_aux_stack+0x8e/0xa0 [ 30.793046] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.793718] remove_vma+0x139/0x170 [ 30.794184] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.794770] do_vmi_munmap+0x1f1/0x2b0 [ 30.795273] __vm_munmap+0x138/0x3a0 [ 30.795746] __x64_sys_munmap+0x59/0x80 [ 30.796248] do_syscall_64+0x3f/0x90 [ 30.796743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.797390] [ 30.797602] The buggy address belongs to the object at ffff88801681a658 [ 30.797602] which belongs to the cache vm_area_struct of size 168 [ 30.799124] The buggy address is located 88 bytes inside of [ 30.799124] freed 168-byte region [ffff88801681a658, ffff88801681a700) [ 30.800544] [ 30.800780] The buggy address belongs to the physical page: [ 30.801450] page:00000000cd0ad4c3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1681a [ 30.802578] memcg:ffff888016c61701 [ 30.803025] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.803719] page_type: 0xffffffff() [ 30.804170] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.805125] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c61701 [ 30.806074] page dumped because: kasan: bad access detected [ 30.806768] [ 30.806988] Memory state around the buggy address: [ 30.807586] ffff88801681a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.808446] ffff88801681a600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.809326] >ffff88801681a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.810200] ^ [ 30.810806] ffff88801681a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.811697] ffff88801681a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.812548] ================================================================== [ 30.813693] Disabling lock debugging due to kernel taint [ 32.801572] BUG: Bad rss-counter state mm:00000000b373e8b1 type:MM_FILEPAGES val:33 [ 32.802749] BUG: Bad rss-counter state mm:00000000b373e8b1 type:MM_ANONPAGES val:22 [ 33.289795] BUG: Bad rss-counter state mm:00000000e4ce7bbc type:MM_FILEPAGES val:33 [ 33.290787] BUG: Bad rss-counter state mm:00000000e4ce7bbc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56879' (ECDSA) to the list of known hosts. 2023/06/21 00:58:20 fuzzer started 2023/06/21 00:58:21 dialing manager at localhost:36067 2023/06/21 00:58:21 checking machine... 2023/06/21 00:58:21 checking revisions... [ 33.919178] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:58:21 testing simple program... [ 33.968094] cgroup: Unknown subsys name 'net' [ 34.015096] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:58:20 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88806ce09940 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652d08 R15=ffff88800ed70b30 RIP=ffffffff8180f09a 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 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=00007fff75d848b8 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=00007f3f3e8f551000005616bb7b5790 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=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=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=00007f6ac1769000 CR3=000000000c662000 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=2030323a38353a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a38353a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000