syzkaller login: [ 64.498273] BUG: Bad rss-counter state mm:00000000afea4b83 type:MM_FILEPAGES val:33 [ 64.499501] BUG: Bad rss-counter state mm:00000000afea4b83 type:MM_ANONPAGES val:22 [ 64.731420] ================================================================== [ 64.732505] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 64.733717] Read of size 8 at addr ffff888010294880 by task sshd/221 [ 64.734525] [ 64.734746] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 64.735600] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 64.736576] Call Trace: [ 64.736897] [ 64.737190] dump_stack_lvl+0x91/0xf0 [ 64.737683] print_report+0xcc/0x620 [ 64.738165] ? __virt_addr_valid+0x102/0x340 [ 64.738715] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.739335] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.739968] kasan_report+0xbe/0xf0 [ 64.740460] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.741111] vma_interval_tree_remove+0xc75/0xec0 [ 64.741754] vma_prepare+0xc54/0x11a0 [ 64.742260] __split_vma+0x5af/0x950 [ 64.742749] ? __pfx___split_vma+0x10/0x10 [ 64.743302] ? find_held_lock+0x2c/0x110 [ 64.743867] do_vmi_align_munmap+0x2ba/0x11f0 [ 64.744472] ? lock_is_held_type+0x9f/0x120 [ 64.745066] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 64.745743] ? mtree_range_walk+0x632/0x900 [ 64.746330] ? mas_walk+0x5c7/0x7c0 [ 64.746824] do_vmi_munmap+0x1f1/0x2b0 [ 64.747325] mmap_region+0x1f9/0x2660 [ 64.747821] ? vm_mmap_pgoff+0x15c/0x3a0 [ 64.748370] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 64.749102] ? __pfx_lock_acquire+0x10/0x10 [ 64.749652] ? __pfx_mmap_region+0x10/0x10 [ 64.750197] ? security_mmap_addr+0x7d/0xa0 [ 64.750727] ? get_unmapped_area+0x1f5/0x3f0 [ 64.751290] do_mmap+0x854/0xf00 [ 64.751733] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.752246] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 64.752822] ksys_mmap_pgoff+0x3af/0x500 [ 64.753339] do_syscall_64+0x3f/0x90 [ 64.753849] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.754500] RIP: 0033:0x7f46ca074d82 [ 64.754958] 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 [ 64.757075] RSP: 002b:00007ffea4d8fd08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 64.758008] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f46ca074d82 [ 64.758851] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f46c94ae000 [ 64.759697] RBP: 00007f46c94ae000 R08: 0000000000000009 R09: 0000000000001000 [ 64.760531] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555692af8980 [ 64.761378] R13: 00007ffea4d8fd20 R14: 00007ffea4d8fd50 R15: 00007ffea4d900b0 [ 64.762242] [ 64.762532] [ 64.762745] Allocated by task 214: [ 64.763170] kasan_save_stack+0x22/0x50 [ 64.763670] kasan_set_track+0x25/0x30 [ 64.764160] __kasan_slab_alloc+0x59/0x70 [ 64.764680] kmem_cache_alloc+0x16b/0x370 [ 64.765192] vm_area_dup+0x20/0x160 [ 64.765658] __split_vma+0x170/0x950 [ 64.766130] split_vma+0xc6/0x110 [ 64.766564] mprotect_fixup+0x8d2/0xb30 [ 64.767065] do_mprotect_pkey+0x87e/0xd40 [ 64.767587] __x64_sys_mprotect+0x78/0xc0 [ 64.768105] do_syscall_64+0x3f/0x90 [ 64.768574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.769221] [ 64.769459] Freed by task 214: [ 64.769853] kasan_save_stack+0x22/0x50 [ 64.770354] kasan_set_track+0x25/0x30 [ 64.770844] kasan_save_free_info+0x2b/0x50 [ 64.771370] __kasan_slab_free+0x10a/0x190 [ 64.771898] kmem_cache_free+0x10d/0x4d0 [ 64.772411] rcu_core+0x8c8/0x2860 [ 64.772858] __do_softirq+0x1b7/0x7d4 [ 64.773336] [ 64.773577] Last potentially related work creation: [ 64.774161] kasan_save_stack+0x22/0x50 [ 64.774663] __kasan_record_aux_stack+0x8e/0xa0 [ 64.775236] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.775880] remove_vma+0x139/0x170 [ 64.776327] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.776876] do_vmi_munmap+0x1f1/0x2b0 [ 64.777358] __vm_munmap+0x138/0x3a0 [ 64.777904] __x64_sys_munmap+0x59/0x80 [ 64.778417] do_syscall_64+0x3f/0x90 [ 64.778887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.779576] [ 64.779795] The buggy address belongs to the object at ffff888010294828 [ 64.779795] which belongs to the cache vm_area_struct of size 168 [ 64.781290] The buggy address is located 88 bytes inside of [ 64.781290] freed 168-byte region [ffff888010294828, ffff8880102948d0) [ 64.782714] [ 64.782932] The buggy address belongs to the physical page: [ 64.783596] page:000000004f74dfe9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10294 [ 64.784698] memcg:ffff88800e1be301 [ 64.785128] flags: 0x100000000000200(slab|node=0|zone=1) [ 64.785781] page_type: 0xffffffff() [ 64.786236] raw: 0100000000000200 ffff88800879fc80 ffffea00005aee80 dead000000000002 [ 64.787158] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1be301 [ 64.788069] page dumped because: kasan: bad access detected [ 64.788727] [ 64.788946] Memory state around the buggy address: [ 64.789553] ffff888010294780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 64.790411] ffff888010294800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 64.791282] >ffff888010294880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 64.792150] ^ [ 64.792567] ffff888010294900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 64.793443] ffff888010294980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 64.794326] ================================================================== [ 64.795327] Disabling lock debugging due to kernel taint [ 67.251085] BUG: Bad rss-counter state mm:0000000049212f0b type:MM_FILEPAGES val:33 [ 67.252067] BUG: Bad rss-counter state mm:0000000049212f0b type:MM_ANONPAGES val:22 [ 67.726115] BUG: Bad rss-counter state mm:00000000b2623075 type:MM_FILEPAGES val:33 [ 67.727090] BUG: Bad rss-counter state mm:00000000b2623075 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59567' (ECDSA) to the list of known hosts. 2023/06/20 01:10:45 fuzzer started 2023/06/20 01:10:45 dialing manager at localhost:44161 2023/06/20 01:10:45 checking machine... 2023/06/20 01:10:45 checking revisions... [ 68.448405] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:10:45 testing simple program... [ 68.494458] cgroup: Unknown subsys name 'net' [ 68.542052] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:10:41 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800f687590 RCX=0000000000000001 RDX=1ffff11001ed0eb3 RSI=ffff88800f687630 RDI=ffff88800f687598 RBP=ffff88800f687630 RSP=ffff88800f687498 R8 =ffffffff86088c1e R9 =ffff88800f6875d0 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000008 R13=ffff88800f6875d8 R14=ffff88800f687638 R15=ffff88800f687590 RIP=ffffffff81130445 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 00007f3523b04900 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=00007f35240b9650 CR3=000000001a1c4000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffc5f834ee8 CR3=000000001837c000 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=2035343a30313a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a30313a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000