syzkaller login: [ 31.118624] BUG: Bad rss-counter state mm:00000000ef971c1e type:MM_FILEPAGES val:33 [ 31.119832] BUG: Bad rss-counter state mm:00000000ef971c1e type:MM_ANONPAGES val:22 [ 31.158822] ================================================================== [ 31.159761] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.160797] Read of size 8 at addr ffff888009a35228 by task sshd/220 [ 31.161590] [ 31.161815] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.163031] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.164063] Call Trace: [ 31.164451] [ 31.164809] dump_stack_lvl+0x91/0xf0 [ 31.165357] print_report+0xcc/0x620 [ 31.165868] ? __virt_addr_valid+0x102/0x340 [ 31.166555] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.167186] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.167858] kasan_report+0xbe/0xf0 [ 31.168408] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.169137] vma_interval_tree_remove+0xc75/0xec0 [ 31.169777] vma_prepare+0xc54/0x11a0 [ 31.170263] __split_vma+0x5af/0x950 [ 31.170748] ? __pfx___split_vma+0x10/0x10 [ 31.171281] ? find_held_lock+0x2c/0x110 [ 31.171803] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.172364] ? lock_is_held_type+0x9f/0x120 [ 31.172900] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.173519] ? mtree_range_walk+0x632/0x900 [ 31.174093] ? mas_walk+0x5c7/0x7c0 [ 31.174570] do_vmi_munmap+0x1f1/0x2b0 [ 31.175060] mmap_region+0x1f9/0x2660 [ 31.175543] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.176055] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.176783] ? __pfx_lock_acquire+0x10/0x10 [ 31.177322] ? __pfx_mmap_region+0x10/0x10 [ 31.177868] ? security_mmap_addr+0x7d/0xa0 [ 31.178401] ? get_unmapped_area+0x1f5/0x3f0 [ 31.178954] do_mmap+0x854/0xf00 [ 31.179401] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.179903] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.180471] ksys_mmap_pgoff+0x3af/0x500 [ 31.180976] do_syscall_64+0x3f/0x90 [ 31.181463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.182125] RIP: 0033:0x7f61c1b0fd82 [ 31.182592] 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 [ 31.184803] RSP: 002b:00007ffe4767a778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.185752] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f61c1b0fd82 [ 31.186633] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f61c0f49000 [ 31.187520] RBP: 00007f61c0f49000 R08: 0000000000000009 R09: 0000000000001000 [ 31.188405] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ee5ae8ff70 [ 31.189294] R13: 00007ffe4767a790 R14: 00007ffe4767a7c0 R15: 00007ffe4767ab20 [ 31.190221] [ 31.190525] [ 31.190751] Allocated by task 213: [ 31.191198] kasan_save_stack+0x22/0x50 [ 31.191727] kasan_set_track+0x25/0x30 [ 31.192240] __kasan_slab_alloc+0x59/0x70 [ 31.192791] kmem_cache_alloc+0x16b/0x370 [ 31.193335] vm_area_dup+0x20/0x160 [ 31.193823] __split_vma+0x170/0x950 [ 31.194315] split_vma+0xc6/0x110 [ 31.194774] mprotect_fixup+0x8d2/0xb30 [ 31.195294] do_mprotect_pkey+0x87e/0xd40 [ 31.195846] __x64_sys_mprotect+0x78/0xc0 [ 31.196387] do_syscall_64+0x3f/0x90 [ 31.196884] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.197557] [ 31.197804] Freed by task 213: [ 31.198200] kasan_save_stack+0x22/0x50 [ 31.198719] kasan_set_track+0x25/0x30 [ 31.199222] kasan_save_free_info+0x2b/0x50 [ 31.199765] __kasan_slab_free+0x10a/0x190 [ 31.200302] kmem_cache_free+0x10d/0x4d0 [ 31.200819] rcu_core+0x8c8/0x2860 [ 31.201261] __do_softirq+0x1b7/0x7d4 [ 31.201760] [ 31.201981] Last potentially related work creation: [ 31.202594] kasan_save_stack+0x22/0x50 [ 31.203109] __kasan_record_aux_stack+0x8e/0xa0 [ 31.203705] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.204350] remove_vma+0x139/0x170 [ 31.204804] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.205489] do_vmi_munmap+0x1f1/0x2b0 [ 31.206025] __vm_munmap+0x138/0x3a0 [ 31.206604] __x64_sys_munmap+0x59/0x80 [ 31.207108] do_syscall_64+0x3f/0x90 [ 31.207581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.208282] [ 31.208508] Second to last potentially related work creation: [ 31.209253] kasan_save_stack+0x22/0x50 [ 31.209808] __kasan_record_aux_stack+0x8e/0xa0 [ 31.210423] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.211109] remove_vma+0x139/0x170 [ 31.211588] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.212181] do_vmi_munmap+0x1f1/0x2b0 [ 31.212708] mmap_region+0x1f9/0x2660 [ 31.213221] do_mmap+0x854/0xf00 [ 31.213694] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.214217] ksys_mmap_pgoff+0x3af/0x500 [ 31.214760] do_syscall_64+0x3f/0x90 [ 31.215270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.215966] [ 31.216195] The buggy address belongs to the object at ffff888009a351d0 [ 31.216195] which belongs to the cache vm_area_struct of size 168 [ 31.217788] The buggy address is located 88 bytes inside of [ 31.217788] freed 168-byte region [ffff888009a351d0, ffff888009a35278) [ 31.219304] [ 31.219534] The buggy address belongs to the physical page: [ 31.220230] page:000000000d0c1ca4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a35 [ 31.221388] memcg:ffff88800ef07701 [ 31.221872] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.222556] page_type: 0xffffffff() [ 31.223027] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 31.224003] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef07701 [ 31.224972] page dumped because: kasan: bad access detected [ 31.225694] [ 31.225922] Memory state around the buggy address: [ 31.226549] ffff888009a35100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.227462] ffff888009a35180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.228389] >ffff888009a35200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.229312] ^ [ 31.229920] ffff888009a35280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.230845] ffff888009a35300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.231745] ================================================================== [ 31.232750] Disabling lock debugging due to kernel taint [ 33.514527] BUG: Bad rss-counter state mm:00000000949a640f type:MM_FILEPAGES val:33 [ 33.515697] BUG: Bad rss-counter state mm:00000000949a640f type:MM_ANONPAGES val:22 [ 33.987444] BUG: Bad rss-counter state mm:000000002c4b354d type:MM_FILEPAGES val:33 [ 33.988457] BUG: Bad rss-counter state mm:000000002c4b354d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3779' (ECDSA) to the list of known hosts. 2023/06/19 21:49:52 fuzzer started 2023/06/19 21:49:52 dialing manager at localhost:44161 2023/06/19 21:49:52 checking machine... 2023/06/19 21:49:52 checking revisions... [ 34.604674] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:49:52 testing simple program... [ 34.638287] cgroup: Unknown subsys name 'net' [ 34.671769] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:49:50 Registers: info registers vcpu 0 RAX=0000000080000201 RBX=0000000000000014 RCX=0000000000000000 RDX=ffff888018d98000 RSI=ffffffff82247039 RDI=0000000000000004 RBP=ffff888019a3bb40 RSP=ffff88800f07f468 R8 =0000000000000004 R9 =0000000000000014 R10=0000000000000f3c R11=563412feff005450 R12=0000000000000010 R13=0000000000000006 R14=ffff88800f07f510 R15=0000000000000f3c RIP=ffffffff814c0800 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 00007f82c28c9900 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=00007ffe89462000 CR3=000000000c87e000 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=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 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=00007fabbdbf1c10 CR3=000000000d990000 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=2032353a39343a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a39343a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000