syzkaller login: [ 31.706996] BUG: Bad rss-counter state mm:000000005b54d283 type:MM_FILEPAGES val:33 [ 31.708022] BUG: Bad rss-counter state mm:000000005b54d283 type:MM_ANONPAGES val:22 [ 31.872982] ================================================================== [ 31.874056] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.875111] Read of size 8 at addr ffff8880147aa310 by task sshd/219 [ 31.876023] [ 31.876238] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.877095] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.878060] Call Trace: [ 31.878391] [ 31.878681] dump_stack_lvl+0x91/0xf0 [ 31.879165] print_report+0xcc/0x620 [ 31.879639] ? __virt_addr_valid+0x102/0x340 [ 31.880185] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.880804] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.881409] kasan_report+0xbe/0xf0 [ 31.881881] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.882505] vma_interval_tree_remove+0xc75/0xec0 [ 31.883100] vma_prepare+0xc54/0x11a0 [ 31.883579] __split_vma+0x5af/0x950 [ 31.884047] ? __pfx___split_vma+0x10/0x10 [ 31.884574] ? find_held_lock+0x2c/0x110 [ 31.885091] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.885656] ? lock_is_held_type+0x9f/0x120 [ 31.886214] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.886818] ? mtree_range_walk+0x632/0x900 [ 31.887364] ? mas_walk+0x5c7/0x7c0 [ 31.887838] do_vmi_munmap+0x1f1/0x2b0 [ 31.888328] mmap_region+0x1f9/0x2660 [ 31.888813] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.889323] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.890031] ? __pfx_lock_acquire+0x10/0x10 [ 31.890784] ? __pfx_mmap_region+0x10/0x10 [ 31.891422] ? security_mmap_addr+0x7d/0xa0 [ 31.892040] ? get_unmapped_area+0x1f5/0x3f0 [ 31.892683] do_mmap+0x854/0xf00 [ 31.893200] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.893783] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.894494] ksys_mmap_pgoff+0x3af/0x500 [ 31.895091] do_syscall_64+0x3f/0x90 [ 31.895654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.896412] RIP: 0033:0x7f71a7441d82 [ 31.896955] 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 [ 31.899453] RSP: 002b:00007ffce02a02f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.900513] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f71a7441d82 [ 31.901505] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f71a687b000 [ 31.902507] RBP: 00007f71a687b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.903507] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f5ec03dec0 [ 31.904498] R13: 00007ffce02a0310 R14: 00007ffce02a0340 R15: 00007ffce02a06a0 [ 31.905505] [ 31.905849] [ 31.906100] Allocated by task 212: [ 31.906637] kasan_save_stack+0x22/0x50 [ 31.907225] kasan_set_track+0x25/0x30 [ 31.907716] __kasan_slab_alloc+0x59/0x70 [ 31.908236] kmem_cache_alloc+0x16b/0x370 [ 31.908753] vm_area_dup+0x20/0x160 [ 31.909202] __split_vma+0x170/0x950 [ 31.909663] split_vma+0xc6/0x110 [ 31.910097] mprotect_fixup+0x8d2/0xb30 [ 31.910608] do_mprotect_pkey+0x87e/0xd40 [ 31.911124] __x64_sys_mprotect+0x78/0xc0 [ 31.911658] do_syscall_64+0x3f/0x90 [ 31.912129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.912767] [ 31.912982] Freed by task 212: [ 31.913369] kasan_save_stack+0x22/0x50 [ 31.913871] kasan_set_track+0x25/0x30 [ 31.914366] kasan_save_free_info+0x2b/0x50 [ 31.914894] __kasan_slab_free+0x10a/0x190 [ 31.915422] kmem_cache_free+0x10d/0x4d0 [ 31.915932] rcu_core+0x8c8/0x2860 [ 31.916374] __do_softirq+0x1b7/0x7d4 [ 31.916844] [ 31.917060] Last potentially related work creation: [ 31.917642] kasan_save_stack+0x22/0x50 [ 31.918161] __kasan_record_aux_stack+0x8e/0xa0 [ 31.918732] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.919368] remove_vma+0x139/0x170 [ 31.919815] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.920446] do_vmi_munmap+0x1f1/0x2b0 [ 31.920932] __vm_munmap+0x138/0x3a0 [ 31.921392] __x64_sys_munmap+0x59/0x80 [ 31.921887] do_syscall_64+0x3f/0x90 [ 31.922368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.923004] [ 31.923218] The buggy address belongs to the object at ffff8880147aa2b8 [ 31.923218] which belongs to the cache vm_area_struct of size 168 [ 31.924674] The buggy address is located 88 bytes inside of [ 31.924674] freed 168-byte region [ffff8880147aa2b8, ffff8880147aa360) [ 31.926066] [ 31.926286] The buggy address belongs to the physical page: [ 31.926942] page:00000000dae2fe42 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x147aa [ 31.928019] memcg:ffff88800fbd6301 [ 31.928441] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.929081] page_type: 0xffffffff() [ 31.929527] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.930453] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fbd6301 [ 31.931350] page dumped because: kasan: bad access detected [ 31.932006] [ 31.932219] Memory state around the buggy address: [ 31.932796] ffff8880147aa200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.933644] ffff8880147aa280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.934505] >ffff8880147aa300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.935362] ^ [ 31.935827] ffff8880147aa380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.936676] ffff8880147aa400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.937530] ================================================================== [ 31.938560] Disabling lock debugging due to kernel taint [ 34.760552] BUG: Bad rss-counter state mm:0000000026ef5bec type:MM_FILEPAGES val:33 [ 34.761709] BUG: Bad rss-counter state mm:0000000026ef5bec type:MM_ANONPAGES val:22 [ 35.179218] BUG: Bad rss-counter state mm:00000000efe28e95 type:MM_FILEPAGES val:33 [ 35.180334] BUG: Bad rss-counter state mm:00000000efe28e95 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12026' (ECDSA) to the list of known hosts. 2023/06/19 21:48:12 fuzzer started 2023/06/19 21:48:12 dialing manager at localhost:44161 2023/06/19 21:48:12 checking machine... 2023/06/19 21:48:12 checking revisions... [ 35.924248] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:48:12 testing simple program... [ 35.970039] cgroup: Unknown subsys name 'net' [ 36.017501] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:48:11 Registers: info registers vcpu 0 RAX=fffff940000e3250 RBX=fffff940000e3251 RCX=ffffffff81b339cf RDX=0000000000000001 RSI=0000000000000008 RDI=ffffea0000719280 RBP=fffff940000e3250 RSP=ffff888008d5f238 R8 =0000000000000000 R9 =fffff940000e3250 R10=ffffea0000719287 R11=0000000000000000 R12=ffff888008d5f638 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8180ef28 RFL=00000283 [--S---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 =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=00007f4a1edcce50 CR3=0000000019e54000 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=2031313a38343a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a38343a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff84499cc7 RDX=ffff888016d6b680 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88800e352850 RSP=ffff88800f2a6e78 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=ffff888015c0d21c R12=0000000000000003 R13=ffff888016fc2e80 R14=dffffc0000000000 R15=0000000000000000 RIP=ffffffff814c0388 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 00007f2c1daaf900 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=00007f2c1da8e020 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=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