syzkaller login: [ 71.026754] BUG: Bad rss-counter state mm:000000008e29086a type:MM_FILEPAGES val:33 [ 71.027989] BUG: Bad rss-counter state mm:000000008e29086a type:MM_ANONPAGES val:22 [ 71.063292] ================================================================== [ 71.064378] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 71.065373] Read of size 8 at addr ffff88800e9753f8 by task sshd/219 [ 71.066194] [ 71.066436] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 71.067522] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 71.068567] Call Trace: [ 71.068908] [ 71.069213] dump_stack_lvl+0x91/0xf0 [ 71.069735] print_report+0xcc/0x620 [ 71.070250] ? __virt_addr_valid+0x102/0x340 [ 71.070849] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.071502] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.072167] kasan_report+0xbe/0xf0 [ 71.072672] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.073332] vma_interval_tree_remove+0xc75/0xec0 [ 71.073985] vma_prepare+0xc54/0x11a0 [ 71.074503] __split_vma+0x5af/0x950 [ 71.075020] ? __pfx___split_vma+0x10/0x10 [ 71.075587] ? find_held_lock+0x2c/0x110 [ 71.076165] do_vmi_align_munmap+0x2ba/0x11f0 [ 71.076774] ? lock_is_held_type+0x9f/0x120 [ 71.077352] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 71.078008] ? mtree_range_walk+0x632/0x900 [ 71.078602] ? mas_walk+0x5c7/0x7c0 [ 71.079115] do_vmi_munmap+0x1f1/0x2b0 [ 71.079649] mmap_region+0x1f9/0x2660 [ 71.080177] ? vm_mmap_pgoff+0x15c/0x3a0 [ 71.080722] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 71.081506] ? __pfx_lock_acquire+0x10/0x10 [ 71.082080] ? __pfx_mmap_region+0x10/0x10 [ 71.082655] ? security_mmap_addr+0x7d/0xa0 [ 71.083228] ? get_unmapped_area+0x1f5/0x3f0 [ 71.083846] do_mmap+0x854/0xf00 [ 71.084311] vm_mmap_pgoff+0x1a6/0x3a0 [ 71.084838] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 71.085443] ksys_mmap_pgoff+0x3af/0x500 [ 71.085996] do_syscall_64+0x3f/0x90 [ 71.086508] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.087203] RIP: 0033:0x7f10327a4d82 [ 71.087700] 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 [ 71.089979] RSP: 002b:00007ffd1fd96818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 71.091170] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f10327a4d82 [ 71.092249] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1031bde000 [ 71.093303] RBP: 00007f1031bde000 R08: 0000000000000009 R09: 0000000000001000 [ 71.094342] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d5401fec0 [ 71.095398] R13: 00007ffd1fd96830 R14: 00007ffd1fd96860 R15: 00007ffd1fd96bc0 [ 71.096459] [ 71.096816] [ 71.097087] Allocated by task 211: [ 71.097611] kasan_save_stack+0x22/0x50 [ 71.098238] kasan_set_track+0x25/0x30 [ 71.098838] __kasan_slab_alloc+0x59/0x70 [ 71.099473] kmem_cache_alloc+0x16b/0x370 [ 71.100138] vm_area_dup+0x20/0x160 [ 71.100694] __split_vma+0x170/0x950 [ 71.101270] split_vma+0xc6/0x110 [ 71.101814] mprotect_fixup+0x8d2/0xb30 [ 71.102428] do_mprotect_pkey+0x87e/0xd40 [ 71.103056] __x64_sys_mprotect+0x78/0xc0 [ 71.103700] do_syscall_64+0x3f/0x90 [ 71.104279] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.105072] [ 71.105335] Freed by task 211: [ 71.105822] kasan_save_stack+0x22/0x50 [ 71.106451] kasan_set_track+0x25/0x30 [ 71.107053] kasan_save_free_info+0x2b/0x50 [ 71.107717] __kasan_slab_free+0x10a/0x190 [ 71.108362] kmem_cache_free+0x10d/0x4d0 [ 71.108978] rcu_core+0x8c8/0x2860 [ 71.109533] __do_softirq+0x1b7/0x7d4 [ 71.110104] [ 71.110371] Last potentially related work creation: [ 71.111101] kasan_save_stack+0x22/0x50 [ 71.111727] __kasan_record_aux_stack+0x8e/0xa0 [ 71.112432] __call_rcu_common.constprop.0+0x6a/0xb90 [ 71.113199] remove_vma+0x139/0x170 [ 71.113739] do_vmi_align_munmap+0xd4a/0x11f0 [ 71.114396] do_vmi_munmap+0x1f1/0x2b0 [ 71.114993] __vm_munmap+0x138/0x3a0 [ 71.115543] __x64_sys_munmap+0x59/0x80 [ 71.116150] do_syscall_64+0x3f/0x90 [ 71.116720] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.117496] [ 71.117753] Second to last potentially related work creation: [ 71.118573] kasan_save_stack+0x22/0x50 [ 71.119176] __kasan_record_aux_stack+0x8e/0xa0 [ 71.119871] __call_rcu_common.constprop.0+0x6a/0xb90 [ 71.120639] remove_vma+0x139/0x170 [ 71.121186] do_vmi_align_munmap+0xd4a/0x11f0 [ 71.121850] do_vmi_munmap+0x1f1/0x2b0 [ 71.122424] mmap_region+0x1f9/0x2660 [ 71.123006] do_mmap+0x854/0xf00 [ 71.123504] vm_mmap_pgoff+0x1a6/0x3a0 [ 71.124108] ksys_mmap_pgoff+0x3af/0x500 [ 71.124712] do_syscall_64+0x3f/0x90 [ 71.125283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.126052] [ 71.126307] The buggy address belongs to the object at ffff88800e9753a0 [ 71.126307] which belongs to the cache vm_area_struct of size 168 [ 71.128072] The buggy address is located 88 bytes inside of [ 71.128072] freed 168-byte region [ffff88800e9753a0, ffff88800e975448) [ 71.129772] [ 71.130034] The buggy address belongs to the physical page: [ 71.130828] page:00000000b2c63428 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe975 [ 71.132141] memcg:ffff88800ed87801 [ 71.132658] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 71.133574] page_type: 0xffffffff() [ 71.134118] raw: 0100000000000200 ffff88800879fc80 ffffea000037e2c0 dead000000000005 [ 71.135224] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed87801 [ 71.136319] page dumped because: kasan: bad access detected [ 71.137115] [ 71.137373] Memory state around the buggy address: [ 71.138059] ffff88800e975280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 71.139095] ffff88800e975300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 71.140150] >ffff88800e975380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 71.141172] ^ [ 71.142179] ffff88800e975400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 71.143211] ffff88800e975480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 71.144261] ================================================================== [ 71.145444] Disabling lock debugging due to kernel taint [ 72.689095] BUG: Bad rss-counter state mm:00000000407b2800 type:MM_FILEPAGES val:33 [ 72.690247] BUG: Bad rss-counter state mm:00000000407b2800 type:MM_ANONPAGES val:22 [ 73.315908] BUG: Bad rss-counter state mm:0000000094409de1 type:MM_FILEPAGES val:33 [ 73.317096] BUG: Bad rss-counter state mm:0000000094409de1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62028' (ECDSA) to the list of known hosts. 2023/06/20 07:32:24 fuzzer started 2023/06/20 07:32:24 dialing manager at localhost:44161 2023/06/20 07:32:24 checking machine... 2023/06/20 07:32:24 checking revisions... [ 73.945862] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:32:24 testing simple program... [ 73.996455] cgroup: Unknown subsys name 'net' [ 74.040416] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:31:42 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffce98c7eb8 CR3=000000000f64c000 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=2034323a32333a3730203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a32333a3730203032 XMM08=3d656e696c646d632022656369767265 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=00007f6879e2d6b0 CR3=000000000c97c000 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=01c23649990cba95ae43543e750b4e83 XMM02=ec2efd57dc4c00df0000000000120b30 XMM03=b1a56ec282c4b4e70000000000120c00 XMM04=f629807f6494bffa00000000000ae988 XMM05=8e4de96da8c07e6e000000000013a748 XMM06=806171799158d96700000000001397e8 XMM07=e042d86d42eb936e0000000000128668 XMM08=b1a56ec282c4b4e70000000000120c00 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000