syzkaller login: [ 30.118605] BUG: Bad rss-counter state mm:000000004199973e type:MM_FILEPAGES val:33 [ 30.119949] BUG: Bad rss-counter state mm:000000004199973e type:MM_ANONPAGES val:22 [ 30.156302] ================================================================== [ 30.157363] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.158499] Read of size 8 at addr ffff88800fb2d5c8 by task sshd/220 [ 30.159428] [ 30.159745] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.160619] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.161572] Call Trace: [ 30.161900] [ 30.162186] dump_stack_lvl+0x91/0xf0 [ 30.162671] print_report+0xcc/0x620 [ 30.163151] ? __virt_addr_valid+0x102/0x340 [ 30.163698] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.164327] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.164938] kasan_report+0xbe/0xf0 [ 30.165416] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.166037] vma_interval_tree_remove+0xc75/0xec0 [ 30.166642] vma_prepare+0xc54/0x11a0 [ 30.167124] __split_vma+0x5af/0x950 [ 30.167591] ? __pfx___split_vma+0x10/0x10 [ 30.168129] ? find_held_lock+0x2c/0x110 [ 30.168691] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.169305] ? lock_is_held_type+0x9f/0x120 [ 30.169886] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.170543] ? mtree_range_walk+0x632/0x900 [ 30.171133] ? mas_walk+0x5c7/0x7c0 [ 30.171644] do_vmi_munmap+0x1f1/0x2b0 [ 30.172190] mmap_region+0x1f9/0x2660 [ 30.172702] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.173259] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.174027] ? __pfx_lock_acquire+0x10/0x10 [ 30.174608] ? __pfx_mmap_region+0x10/0x10 [ 30.175179] ? security_mmap_addr+0x7d/0xa0 [ 30.175757] ? get_unmapped_area+0x1f5/0x3f0 [ 30.176369] do_mmap+0x854/0xf00 [ 30.176843] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.177385] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.177988] ksys_mmap_pgoff+0x3af/0x500 [ 30.178543] do_syscall_64+0x3f/0x90 [ 30.179060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.179764] RIP: 0033:0x7fc450089d82 [ 30.180261] 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 [ 30.182553] RSP: 002b:00007ffe75554228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.183529] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc450089d82 [ 30.184459] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc44f4c3000 [ 30.185376] RBP: 00007fc44f4c3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.186293] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564bd361ff70 [ 30.187211] R13: 00007ffe75554240 R14: 00007ffe75554270 R15: 00007ffe755545d0 [ 30.188166] [ 30.188482] [ 30.188715] Allocated by task 213: [ 30.189187] kasan_save_stack+0x22/0x50 [ 30.189733] kasan_set_track+0x25/0x30 [ 30.190266] __kasan_slab_alloc+0x59/0x70 [ 30.190833] kmem_cache_alloc+0x16b/0x370 [ 30.191388] vm_area_dup+0x20/0x160 [ 30.191903] __split_vma+0x170/0x950 [ 30.192420] split_vma+0xc6/0x110 [ 30.192886] mprotect_fixup+0x8d2/0xb30 [ 30.193438] do_mprotect_pkey+0x87e/0xd40 [ 30.193998] __x64_sys_mprotect+0x78/0xc0 [ 30.194557] do_syscall_64+0x3f/0x90 [ 30.195072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.195769] [ 30.196019] Freed by task 213: [ 30.196445] kasan_save_stack+0x22/0x50 [ 30.196983] kasan_set_track+0x25/0x30 [ 30.197516] kasan_save_free_info+0x2b/0x50 [ 30.198095] __kasan_slab_free+0x10a/0x190 [ 30.198674] kmem_cache_free+0x10d/0x4d0 [ 30.199223] rcu_core+0x8c8/0x2860 [ 30.199707] __do_softirq+0x1b7/0x7d4 [ 30.200230] [ 30.200466] Last potentially related work creation: [ 30.201102] kasan_save_stack+0x22/0x50 [ 30.201639] __kasan_record_aux_stack+0x8e/0xa0 [ 30.202263] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.202964] remove_vma+0x139/0x170 [ 30.203453] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.204077] do_vmi_munmap+0x1f1/0x2b0 [ 30.204605] __vm_munmap+0x138/0x3a0 [ 30.205105] __x64_sys_munmap+0x59/0x80 [ 30.205641] do_syscall_64+0x3f/0x90 [ 30.206163] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.206861] [ 30.207092] Second to last potentially related work creation: [ 30.207829] kasan_save_stack+0x22/0x50 [ 30.208380] __kasan_record_aux_stack+0x8e/0xa0 [ 30.209003] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.209695] remove_vma+0x139/0x170 [ 30.210186] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.210789] do_vmi_munmap+0x1f1/0x2b0 [ 30.211314] mmap_region+0x1f9/0x2660 [ 30.211853] do_mmap+0x854/0xf00 [ 30.212327] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.212862] ksys_mmap_pgoff+0x3af/0x500 [ 30.213423] do_syscall_64+0x3f/0x90 [ 30.213939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.214647] [ 30.214879] The buggy address belongs to the object at ffff88800fb2d570 [ 30.214879] which belongs to the cache vm_area_struct of size 168 [ 30.216482] The buggy address is located 88 bytes inside of [ 30.216482] freed 168-byte region [ffff88800fb2d570, ffff88800fb2d618) [ 30.218020] [ 30.218253] The buggy address belongs to the physical page: [ 30.218969] page:00000000b4d4e823 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb2d [ 30.220148] memcg:ffff888019f0d301 [ 30.220612] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.221306] page_type: 0xffffffff() [ 30.221799] raw: 0100000000000200 ffff8880087a0c80 ffffea000067be80 000000000000000a [ 30.222791] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f0d301 [ 30.223770] page dumped because: kasan: bad access detected [ 30.224519] [ 30.224754] Memory state around the buggy address: [ 30.225383] ffff88800fb2d480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.226309] ffff88800fb2d500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.227243] >ffff88800fb2d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.228174] ^ [ 30.228901] ffff88800fb2d600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 30.229827] ffff88800fb2d680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.230743] ================================================================== [ 30.231776] Disabling lock debugging due to kernel taint [ 33.033722] BUG: Bad rss-counter state mm:00000000429f76bc type:MM_FILEPAGES val:33 [ 33.034750] BUG: Bad rss-counter state mm:00000000429f76bc type:MM_ANONPAGES val:22 [ 33.489541] BUG: Bad rss-counter state mm:00000000b9563b89 type:MM_FILEPAGES val:33 [ 33.490787] BUG: Bad rss-counter state mm:00000000b9563b89 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57417' (ECDSA) to the list of known hosts. 2023/06/21 03:20:30 fuzzer started 2023/06/21 03:20:30 dialing manager at localhost:36067 2023/06/21 03:20:30 checking machine... 2023/06/21 03:20:30 checking revisions... [ 34.228474] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:20:30 testing simple program... [ 34.282450] cgroup: Unknown subsys name 'net' [ 34.344733] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:20:29 Registers: info registers vcpu 0 RAX=ffffffff8185af69 RBX=ffffffff85e03b34 RCX=ffffffff8185af32 RDX=0000000000000000 RSI=ffffffff86141712 RDI=ffffffff85e03b20 RBP=ffffffff85e03b20 RSP=ffff88801611f8d0 R8 =ffffffff86141712 R9 =ffff88801611f9c8 R10=0000000000038001 R11=0000000000022457 R12=ffffffff85e03b30 R13=ffffffff85e03b20 R14=ffffffff85e03b20 R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000297 [--S-APC] 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 00007f11b6355900 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=00007f11b690a650 CR3=000000001d1b8000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00005605a73e5c70 CR3=0000000005482000 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=00007f129aafe5100000564b4b9dc790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000