syzkaller login: [ 28.955511] BUG: Bad rss-counter state mm:00000000be4d0a5b type:MM_FILEPAGES val:33 [ 28.956840] BUG: Bad rss-counter state mm:00000000be4d0a5b type:MM_ANONPAGES val:22 [ 29.120790] ================================================================== [ 29.121678] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.122621] Read of size 8 at addr ffff88800de0f968 by task sshd/220 [ 29.123383] [ 29.123598] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.124552] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.125517] Call Trace: [ 29.125866] [ 29.126154] dump_stack_lvl+0x91/0xf0 [ 29.126648] print_report+0xcc/0x620 [ 29.127127] ? __virt_addr_valid+0x102/0x340 [ 29.127679] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.128297] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.128898] kasan_report+0xbe/0xf0 [ 29.129364] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.129993] vma_interval_tree_remove+0xc75/0xec0 [ 29.130588] vma_prepare+0xc54/0x11a0 [ 29.131054] __split_vma+0x5af/0x950 [ 29.131521] ? __pfx___split_vma+0x10/0x10 [ 29.132043] ? find_held_lock+0x2c/0x110 [ 29.132558] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.133115] ? lock_is_held_type+0x9f/0x120 [ 29.133639] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.134253] ? mtree_range_walk+0x632/0x900 [ 29.134798] ? mas_walk+0x5c7/0x7c0 [ 29.135268] do_vmi_munmap+0x1f1/0x2b0 [ 29.135757] mmap_region+0x1f9/0x2660 [ 29.136251] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.136752] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.137464] ? __pfx_lock_acquire+0x10/0x10 [ 29.138020] ? __pfx_mmap_region+0x10/0x10 [ 29.138552] ? security_mmap_addr+0x7d/0xa0 [ 29.139084] ? get_unmapped_area+0x1f5/0x3f0 [ 29.139636] do_mmap+0x854/0xf00 [ 29.140069] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.140560] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.141116] ksys_mmap_pgoff+0x3af/0x500 [ 29.141630] do_syscall_64+0x3f/0x90 [ 29.142108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.142749] RIP: 0033:0x7f4f5feb5d82 [ 29.143193] 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 [ 29.145301] RSP: 002b:00007ffc395d00a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.146187] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4f5feb5d82 [ 29.147023] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4f5f2ef000 [ 29.147866] RBP: 00007f4f5f2ef000 R08: 0000000000000009 R09: 0000000000001000 [ 29.148694] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d01d5e4f70 [ 29.149518] R13: 00007ffc395d00c0 R14: 00007ffc395d00f0 R15: 00007ffc395d0450 [ 29.150374] [ 29.150661] [ 29.150874] Allocated by task 213: [ 29.151294] kasan_save_stack+0x22/0x50 [ 29.151790] kasan_set_track+0x25/0x30 [ 29.152276] __kasan_slab_alloc+0x59/0x70 [ 29.152786] kmem_cache_alloc+0x16b/0x370 [ 29.153299] vm_area_dup+0x20/0x160 [ 29.153750] __split_vma+0x170/0x950 [ 29.154220] split_vma+0xc6/0x110 [ 29.154653] mprotect_fixup+0x8d2/0xb30 [ 29.155147] do_mprotect_pkey+0x87e/0xd40 [ 29.155671] __x64_sys_mprotect+0x78/0xc0 [ 29.156186] do_syscall_64+0x3f/0x90 [ 29.156652] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.157277] [ 29.157489] Freed by task 210: [ 29.157896] kasan_save_stack+0x22/0x50 [ 29.158390] kasan_set_track+0x25/0x30 [ 29.158874] kasan_save_free_info+0x2b/0x50 [ 29.159399] __kasan_slab_free+0x10a/0x190 [ 29.159925] kmem_cache_free+0x10d/0x4d0 [ 29.160428] rcu_core+0x8c8/0x2860 [ 29.160866] __do_softirq+0x1b7/0x7d4 [ 29.161336] [ 29.161548] Last potentially related work creation: [ 29.162134] kasan_save_stack+0x22/0x50 [ 29.162626] __kasan_record_aux_stack+0x8e/0xa0 [ 29.163186] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.163816] remove_vma+0x139/0x170 [ 29.164258] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.164808] do_vmi_munmap+0x1f1/0x2b0 [ 29.165290] __vm_munmap+0x138/0x3a0 [ 29.165771] __x64_sys_munmap+0x59/0x80 [ 29.166267] do_syscall_64+0x3f/0x90 [ 29.166733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.167360] [ 29.167573] Second to last potentially related work creation: [ 29.168248] kasan_save_stack+0x22/0x50 [ 29.168744] __kasan_record_aux_stack+0x8e/0xa0 [ 29.169314] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.169956] remove_vma+0x139/0x170 [ 29.170401] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.170959] do_vmi_munmap+0x1f1/0x2b0 [ 29.171447] mmap_region+0x1f9/0x2660 [ 29.171917] do_mmap+0x854/0xf00 [ 29.172347] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.172834] ksys_mmap_pgoff+0x3af/0x500 [ 29.173329] do_syscall_64+0x3f/0x90 [ 29.173798] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.174430] [ 29.174642] The buggy address belongs to the object at ffff88800de0f910 [ 29.174642] which belongs to the cache vm_area_struct of size 168 [ 29.176084] The buggy address is located 88 bytes inside of [ 29.176084] freed 168-byte region [ffff88800de0f910, ffff88800de0f9b8) [ 29.177468] [ 29.177681] The buggy address belongs to the physical page: [ 29.178354] page:00000000753a872b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde0f [ 29.179418] memcg:ffff8880096caf01 [ 29.179839] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.180482] page_type: 0xffffffff() [ 29.180927] raw: 0100000000000200 ffff88800879fc80 ffffea0000670140 dead000000000006 [ 29.181836] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880096caf01 [ 29.182725] page dumped because: kasan: bad access detected [ 29.183373] [ 29.183589] Memory state around the buggy address: [ 29.184165] ffff88800de0f800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 29.185005] ffff88800de0f880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 29.185853] >ffff88800de0f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.186690] ^ [ 29.187466] ffff88800de0f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 29.188305] ffff88800de0fa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.189154] ================================================================== [ 29.190119] Disabling lock debugging due to kernel taint [ 30.947690] BUG: Bad rss-counter state mm:00000000b9277e6b type:MM_FILEPAGES val:33 [ 30.948442] BUG: Bad rss-counter state mm:00000000b9277e6b type:MM_ANONPAGES val:22 [ 31.287533] BUG: Bad rss-counter state mm:000000007d0debe5 type:MM_FILEPAGES val:33 [ 31.288097] BUG: Bad rss-counter state mm:000000007d0debe5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17989' (ECDSA) to the list of known hosts. 2023/06/19 22:26:45 fuzzer started 2023/06/19 22:26:46 dialing manager at localhost:44161 2023/06/19 22:26:46 checking machine... 2023/06/19 22:26:46 checking revisions... [ 32.034178] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:26:46 testing simple program... [ 32.075989] cgroup: Unknown subsys name 'net' [ 32.114265] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:26:40 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81eeb04f RDX=000000000000eeb0 RSI=000000000000eeb0 RDI=ffffffff86523680 RBP=ffff88800c447540 RSP=ffff88800c447478 R8 =0000000000000000 R9 =ffff88800c447528 R10=0000000000038001 R11=0000000000020d06 R12=ffff88800c447548 R13=ffff88800c447530 R14=ffff88800c447529 R15=ffff88800c4474e8 RIP=ffffffff8113077a 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 00007fa32385d700 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=00007fff4246b528 CR3=000000001a0f8000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732035343a3632 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383335 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=0000000000000001 RCX=ffffffff864bb001 RDX=1ffff11002ceae68 RSI=ffffffff813ad47f RDI=ffff888016757340 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =ffffffff864bb032 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff8880167572b8 R15=ffff88806cf09a70 RIP=ffffffff811306b3 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 00007ff813c06900 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=00007ff8141bd618 CR3=0000000009656000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000