syzkaller login: [ 28.654382] BUG: Bad rss-counter state mm:00000000941741a7 type:MM_FILEPAGES val:33 [ 28.656023] BUG: Bad rss-counter state mm:00000000941741a7 type:MM_ANONPAGES val:22 [ 28.716472] sshd (217) used greatest stack depth: 24128 bytes left [ 28.858760] ================================================================== [ 28.859844] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.861096] Read of size 8 at addr ffff88800edea798 by task sshd/221 [ 28.861850] [ 28.862092] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.862954] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.863908] Call Trace: [ 28.864224] [ 28.864509] dump_stack_lvl+0x91/0xf0 [ 28.865000] print_report+0xcc/0x620 [ 28.865482] ? __virt_addr_valid+0x102/0x340 [ 28.866037] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.866647] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.867261] kasan_report+0xbe/0xf0 [ 28.867736] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.868374] vma_interval_tree_remove+0xc75/0xec0 [ 28.869001] vma_prepare+0xc54/0x11a0 [ 28.869498] __split_vma+0x5af/0x950 [ 28.869992] ? __pfx___split_vma+0x10/0x10 [ 28.870567] ? find_held_lock+0x2c/0x110 [ 28.871102] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.871676] ? lock_is_held_type+0x9f/0x120 [ 28.872237] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.872864] ? mtree_range_walk+0x632/0x900 [ 28.873436] ? mas_walk+0x5c7/0x7c0 [ 28.873922] do_vmi_munmap+0x1f1/0x2b0 [ 28.874447] mmap_region+0x1f9/0x2660 [ 28.874941] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.875476] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.876220] ? __pfx_lock_acquire+0x10/0x10 [ 28.876784] ? __pfx_mmap_region+0x10/0x10 [ 28.877334] ? security_mmap_addr+0x7d/0xa0 [ 28.877886] ? get_unmapped_area+0x1f5/0x3f0 [ 28.878469] do_mmap+0x854/0xf00 [ 28.878924] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.879431] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.880016] ksys_mmap_pgoff+0x3af/0x500 [ 28.880541] do_syscall_64+0x3f/0x90 [ 28.881034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.881705] RIP: 0033:0x7f9641752d82 [ 28.882205] 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 [ 28.884423] RSP: 002b:00007ffcd64795b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.885367] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9641752d82 [ 28.886248] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9640b8c000 [ 28.887129] RBP: 00007f9640b8c000 R08: 0000000000000009 R09: 0000000000001000 [ 28.888017] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f34d7aec0 [ 28.888896] R13: 00007ffcd64795d0 R14: 00007ffcd6479600 R15: 00007ffcd6479960 [ 28.889784] [ 28.890101] [ 28.890324] Allocated by task 211: [ 28.890759] kasan_save_stack+0x22/0x50 [ 28.891275] kasan_set_track+0x25/0x30 [ 28.891786] __kasan_slab_alloc+0x59/0x70 [ 28.892332] kmem_cache_alloc+0x16b/0x370 [ 28.892872] vm_area_dup+0x20/0x160 [ 28.893347] __split_vma+0x170/0x950 [ 28.893828] split_vma+0xc6/0x110 [ 28.894308] mprotect_fixup+0x8d2/0xb30 [ 28.894825] do_mprotect_pkey+0x87e/0xd40 [ 28.895358] __x64_sys_mprotect+0x78/0xc0 [ 28.895894] do_syscall_64+0x3f/0x90 [ 28.896389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.897047] [ 28.897267] Freed by task 211: [ 28.897668] kasan_save_stack+0x22/0x50 [ 28.898195] kasan_set_track+0x25/0x30 [ 28.898705] kasan_save_free_info+0x2b/0x50 [ 28.899255] __kasan_slab_free+0x10a/0x190 [ 28.899808] kmem_cache_free+0x10d/0x4d0 [ 28.900328] rcu_core+0x8c8/0x2860 [ 28.900784] __do_softirq+0x1b7/0x7d4 [ 28.901272] [ 28.901495] Last potentially related work creation: [ 28.902212] kasan_save_stack+0x22/0x50 [ 28.902729] __kasan_record_aux_stack+0x8e/0xa0 [ 28.903327] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.903991] remove_vma+0x139/0x170 [ 28.904461] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.905035] do_vmi_munmap+0x1f1/0x2b0 [ 28.905539] __vm_munmap+0x138/0x3a0 [ 28.906019] __x64_sys_munmap+0x59/0x80 [ 28.906551] do_syscall_64+0x3f/0x90 [ 28.907039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.907710] [ 28.907927] Second to last potentially related work creation: [ 28.908648] kasan_save_stack+0x22/0x50 [ 28.909182] __kasan_record_aux_stack+0x8e/0xa0 [ 28.909776] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.910469] remove_vma+0x139/0x170 [ 28.910930] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.911511] do_vmi_munmap+0x1f1/0x2b0 [ 28.912017] mmap_region+0x1f9/0x2660 [ 28.912511] do_mmap+0x854/0xf00 [ 28.912962] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.913478] ksys_mmap_pgoff+0x7d/0x500 [ 28.913982] do_syscall_64+0x3f/0x90 [ 28.914485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.915143] [ 28.915363] The buggy address belongs to the object at ffff88800edea740 [ 28.915363] which belongs to the cache vm_area_struct of size 168 [ 28.916891] The buggy address is located 88 bytes inside of [ 28.916891] freed 168-byte region [ffff88800edea740, ffff88800edea7e8) [ 28.918370] [ 28.918591] The buggy address belongs to the physical page: [ 28.919303] page:0000000075cd8603 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedea [ 28.920539] memcg:ffff88800ef0c001 [ 28.921025] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.921829] page_type: 0xffffffff() [ 28.922360] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 28.923452] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef0c001 [ 28.924509] page dumped because: kasan: bad access detected [ 28.925251] [ 28.925499] Memory state around the buggy address: [ 28.926170] ffff88800edea680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.927142] ffff88800edea700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 28.928113] >ffff88800edea780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 28.928976] ^ [ 28.929467] ffff88800edea800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 28.930354] ffff88800edea880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 28.931218] ================================================================== [ 28.932211] Disabling lock debugging due to kernel taint [ 31.579337] BUG: Bad rss-counter state mm:000000001ce67f3c type:MM_FILEPAGES val:33 [ 31.580350] BUG: Bad rss-counter state mm:000000001ce67f3c type:MM_ANONPAGES val:22 [ 32.144266] BUG: Bad rss-counter state mm:00000000810e3a08 type:MM_FILEPAGES val:33 [ 32.145231] BUG: Bad rss-counter state mm:00000000810e3a08 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36778' (ECDSA) to the list of known hosts. 2023/06/21 06:02:24 fuzzer started 2023/06/21 06:02:25 dialing manager at localhost:36067 2023/06/21 06:02:25 checking machine... 2023/06/21 06:02:25 checking revisions... [ 32.752382] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:02:25 testing simple program... [ 32.790678] cgroup: Unknown subsys name 'net' [ 32.828053] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:02:24 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888014314580 RCX=0000000000000000 RDX=ffff888015c81b40 RSI=ffffffff83c12585 RDI=0000000000000001 RBP=ffff88800f102000 RSP=ffff8880164b7850 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff888014314540 R13=ffff88800f102060 R14=0000000000000000 R15=ffff88800f102274 RIP=ffffffff814c086b RFL=00000293 [--S-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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f58505c2700 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=00007f1434623940 CR3=000000000daa0000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383330 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffff888019d67738 RDX=1ffff110033aced3 RSI=ffffffff813ad720 RDI=ffff888019d67698 RBP=ffff888019d67730 RSP=ffff888019d67670 R8 =0000000000000001 R9 =ffff888019d676d8 R10=0000000000038001 R11=0000000000003c0d R12=ffff888019d67760 R13=0000000000000000 R14=ffff888015ce0000 R15=ffff888019d67698 RIP=ffffffff811305f0 RFL=00000212 [----A--] 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 00007f49fd8c2900 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=00007f49fd8a1020 CR3=000000000f3b4000 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