syzkaller login: [ 38.822103] BUG: Bad rss-counter state mm:000000007f16ce2b type:MM_FILEPAGES val:33 [ 38.823294] BUG: Bad rss-counter state mm:000000007f16ce2b type:MM_ANONPAGES val:22 [ 38.862796] ================================================================== [ 38.863706] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.864679] Read of size 8 at addr ffff88800e379b38 by task sshd/218 [ 38.865571] [ 38.865795] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.866661] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.867678] Call Trace: [ 38.868002] [ 38.868296] dump_stack_lvl+0x91/0xf0 [ 38.868794] print_report+0xcc/0x620 [ 38.869292] ? __virt_addr_valid+0x102/0x340 [ 38.869838] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.870462] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.871081] kasan_report+0xbe/0xf0 [ 38.871561] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.872189] vma_interval_tree_remove+0xc75/0xec0 [ 38.872805] vma_prepare+0xc54/0x11a0 [ 38.873286] __split_vma+0x5af/0x950 [ 38.873757] ? __pfx___split_vma+0x10/0x10 [ 38.874286] ? find_held_lock+0x2c/0x110 [ 38.874806] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.875373] ? lock_is_held_type+0x9f/0x120 [ 38.875996] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.876635] ? mtree_range_walk+0x632/0x900 [ 38.877200] ? mas_walk+0x5c7/0x7c0 [ 38.877686] do_vmi_munmap+0x1f1/0x2b0 [ 38.878183] mmap_region+0x1f9/0x2660 [ 38.878667] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.879185] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.879905] ? __pfx_lock_acquire+0x10/0x10 [ 38.880476] ? __pfx_mmap_region+0x10/0x10 [ 38.881033] ? security_mmap_addr+0x7d/0xa0 [ 38.881584] ? get_unmapped_area+0x1f5/0x3f0 [ 38.882158] do_mmap+0x854/0xf00 [ 38.882616] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.883130] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.883716] ksys_mmap_pgoff+0x3af/0x500 [ 38.884247] do_syscall_64+0x3f/0x90 [ 38.884770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.885459] RIP: 0033:0x7fca1eb2ad82 [ 38.885943] 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 [ 38.888189] RSP: 002b:00007fff3d1525e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.889145] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fca1eb2ad82 [ 38.890036] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fca1df64000 [ 38.890924] RBP: 00007fca1df64000 R08: 0000000000000009 R09: 0000000000001000 [ 38.891806] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cbbd641ec0 [ 38.892701] R13: 00007fff3d152600 R14: 00007fff3d152630 R15: 00007fff3d152990 [ 38.893600] [ 38.893907] [ 38.894130] Allocated by task 211: [ 38.894583] kasan_save_stack+0x22/0x50 [ 38.895115] kasan_set_track+0x25/0x30 [ 38.895635] __kasan_slab_alloc+0x59/0x70 [ 38.896188] kmem_cache_alloc+0x16b/0x370 [ 38.896744] vm_area_dup+0x20/0x160 [ 38.897220] __split_vma+0x170/0x950 [ 38.897710] split_vma+0xc6/0x110 [ 38.898172] mprotect_fixup+0x8d2/0xb30 [ 38.898701] do_mprotect_pkey+0x87e/0xd40 [ 38.899245] __x64_sys_mprotect+0x78/0xc0 [ 38.899795] do_syscall_64+0x3f/0x90 [ 38.900301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.900984] [ 38.901208] Freed by task 211: [ 38.901628] kasan_save_stack+0x22/0x50 [ 38.902157] kasan_set_track+0x25/0x30 [ 38.902675] kasan_save_free_info+0x2b/0x50 [ 38.903227] __kasan_slab_free+0x10a/0x190 [ 38.903786] kmem_cache_free+0x10d/0x4d0 [ 38.904334] rcu_core+0x8c8/0x2860 [ 38.904798] __do_softirq+0x1b7/0x7d4 [ 38.905298] [ 38.905522] Last potentially related work creation: [ 38.906145] kasan_save_stack+0x22/0x50 [ 38.906672] __kasan_record_aux_stack+0x8e/0xa0 [ 38.907270] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.907946] remove_vma+0x139/0x170 [ 38.908426] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.909010] do_vmi_munmap+0x1f1/0x2b0 [ 38.909522] __vm_munmap+0x138/0x3a0 [ 38.910031] __x64_sys_munmap+0x59/0x80 [ 38.910551] do_syscall_64+0x3f/0x90 [ 38.911051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.911728] [ 38.911957] Second to last potentially related work creation: [ 38.912695] kasan_save_stack+0x22/0x50 [ 38.913227] __kasan_record_aux_stack+0x8e/0xa0 [ 38.913832] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.914513] remove_vma+0x139/0x170 [ 38.914988] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.915566] do_vmi_munmap+0x1f1/0x2b0 [ 38.916070] mmap_region+0x1f9/0x2660 [ 38.916577] do_mmap+0x854/0xf00 [ 38.917032] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.917544] ksys_mmap_pgoff+0x3af/0x500 [ 38.918068] do_syscall_64+0x3f/0x90 [ 38.918566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.919238] [ 38.919464] The buggy address belongs to the object at ffff88800e379ae0 [ 38.919464] which belongs to the cache vm_area_struct of size 168 [ 38.921011] The buggy address is located 88 bytes inside of [ 38.921011] freed 168-byte region [ffff88800e379ae0, ffff88800e379b88) [ 38.922494] [ 38.922717] The buggy address belongs to the physical page: [ 38.923413] page:0000000030119798 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe379 [ 38.924555] memcg:ffff8880144aea01 [ 38.925006] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.925690] page_type: 0xffffffff() [ 38.926164] raw: 0100000000000200 ffff8880087a0c80 ffffea000038d980 dead000000000002 [ 38.927137] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144aea01 [ 38.928099] page dumped because: kasan: bad access detected [ 38.928802] [ 38.929025] Memory state around the buggy address: [ 38.929638] ffff88800e379a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.930540] ffff88800e379a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.931446] >ffff88800e379b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.932365] ^ [ 38.933011] ffff88800e379b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.933909] ffff88800e379c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.934811] ================================================================== [ 38.935976] Disabling lock debugging due to kernel taint [ 41.566429] BUG: Bad rss-counter state mm:00000000b12c873b type:MM_FILEPAGES val:33 [ 41.567899] BUG: Bad rss-counter state mm:00000000b12c873b type:MM_ANONPAGES val:22 [ 42.172881] BUG: Bad rss-counter state mm:000000001de7e506 type:MM_FILEPAGES val:33 [ 42.174048] BUG: Bad rss-counter state mm:000000001de7e506 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34314' (ECDSA) to the list of known hosts. 2023/06/20 19:29:33 fuzzer started 2023/06/20 19:29:33 dialing manager at localhost:36067 2023/06/20 19:29:33 checking machine... 2023/06/20 19:29:33 checking revisions... [ 42.800237] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:29:34 testing simple program... [ 42.851318] cgroup: Unknown subsys name 'net' [ 42.892256] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:29:33 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88801bd8aa00 RCX=0000000000000000 RDX=ffff888015b351c0 RSI=ffffffff836380de RDI=0000000000000005 RBP=ffff8880159c79b0 RSP=ffff8880159c7820 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=322e322e302e3031 R12=ffff88800fe10000 R13=0000000000000000 R14=ffff88800fe10060 R15=ffff8880159c7910 RIP=ffffffff814c086b RFL=00000282 [--S----] 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 00007fea4afb7700 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=00007f3931a20140 CR3=0000000015b1c000 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=485320415352203a3268737320323232 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=ffffffff83862610 RBX=0000000000000002 RCX=ffffffff813782c0 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800ed456c0 RBP=0000000000000003 RSP=ffff888008e37d40 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888008e37dc8 R14=ffff88806cf35000 R15=ffff88800ed456c0 RIP=ffffffff83862614 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 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=00007fffcc9ea000 CR3=0000000017f98000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000