syzkaller login: [ 30.308066] BUG: Bad rss-counter state mm:0000000044f8b655 type:MM_FILEPAGES val:33 [ 30.309063] BUG: Bad rss-counter state mm:0000000044f8b655 type:MM_ANONPAGES val:22 [ 30.477676] ================================================================== [ 30.478606] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.479557] Read of size 8 at addr ffff88800ecb4880 by task sshd/222 [ 30.480327] [ 30.480662] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.481574] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.482571] Call Trace: [ 30.482925] [ 30.483220] dump_stack_lvl+0x91/0xf0 [ 30.483745] print_report+0xcc/0x620 [ 30.484238] ? __virt_addr_valid+0x102/0x340 [ 30.484822] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.485475] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.486093] kasan_report+0xbe/0xf0 [ 30.486586] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.487214] vma_interval_tree_remove+0xc75/0xec0 [ 30.487841] vma_prepare+0xc54/0x11a0 [ 30.488317] __split_vma+0x5af/0x950 [ 30.488814] ? __pfx___split_vma+0x10/0x10 [ 30.489360] ? find_held_lock+0x2c/0x110 [ 30.489901] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.490482] ? lock_is_held_type+0x9f/0x120 [ 30.491022] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.491652] ? mtree_range_walk+0x632/0x900 [ 30.492215] ? mas_walk+0x5c7/0x7c0 [ 30.492721] do_vmi_munmap+0x1f1/0x2b0 [ 30.493212] mmap_region+0x1f9/0x2660 [ 30.493743] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.494259] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.494994] ? __pfx_lock_acquire+0x10/0x10 [ 30.495543] ? __pfx_mmap_region+0x10/0x10 [ 30.496087] ? security_mmap_addr+0x7d/0xa0 [ 30.496645] ? get_unmapped_area+0x1f5/0x3f0 [ 30.497197] do_mmap+0x854/0xf00 [ 30.497668] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.498165] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.498737] ksys_mmap_pgoff+0x3af/0x500 [ 30.499242] do_syscall_64+0x3f/0x90 [ 30.499752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.500406] RIP: 0033:0x7f79db76ad82 [ 30.500884] 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 [ 30.503037] RSP: 002b:00007ffc2a879528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.503965] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f79db76ad82 [ 30.504844] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f79daba4000 [ 30.505827] RBP: 00007f79daba4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.506664] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a95142ff70 [ 30.507498] R13: 00007ffc2a879540 R14: 00007ffc2a879570 R15: 00007ffc2a8798d0 [ 30.508332] [ 30.508649] [ 30.508863] Allocated by task 215: [ 30.509421] kasan_save_stack+0x22/0x50 [ 30.510067] kasan_set_track+0x25/0x30 [ 30.510698] __kasan_slab_alloc+0x59/0x70 [ 30.511367] kmem_cache_alloc+0x16b/0x370 [ 30.512028] vm_area_dup+0x20/0x160 [ 30.512609] __split_vma+0x170/0x950 [ 30.513206] split_vma+0xc6/0x110 [ 30.513801] mprotect_fixup+0x8d2/0xb30 [ 30.514448] do_mprotect_pkey+0x87e/0xd40 [ 30.515115] __x64_sys_mprotect+0x78/0xc0 [ 30.515787] do_syscall_64+0x3f/0x90 [ 30.516400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.517236] [ 30.517527] Freed by task 19: [ 30.518026] kasan_save_stack+0x22/0x50 [ 30.518684] kasan_set_track+0x25/0x30 [ 30.519326] kasan_save_free_info+0x2b/0x50 [ 30.520023] __kasan_slab_free+0x10a/0x190 [ 30.520721] kmem_cache_free+0x10d/0x4d0 [ 30.521400] rcu_core+0x8c8/0x2860 [ 30.521984] __do_softirq+0x1b7/0x7d4 [ 30.522616] [ 30.522900] Last potentially related work creation: [ 30.523677] kasan_save_stack+0x22/0x50 [ 30.524338] __kasan_record_aux_stack+0x8e/0xa0 [ 30.525108] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.525983] remove_vma+0x139/0x170 [ 30.526573] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.527311] do_vmi_munmap+0x1f1/0x2b0 [ 30.527955] __vm_munmap+0x138/0x3a0 [ 30.528578] __x64_sys_munmap+0x59/0x80 [ 30.529242] do_syscall_64+0x3f/0x90 [ 30.529877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.530723] [ 30.531002] The buggy address belongs to the object at ffff88800ecb4828 [ 30.531002] which belongs to the cache vm_area_struct of size 168 [ 30.532949] The buggy address is located 88 bytes inside of [ 30.532949] freed 168-byte region [ffff88800ecb4828, ffff88800ecb48d0) [ 30.534832] [ 30.535120] The buggy address belongs to the physical page: [ 30.536001] page:00000000cadaa2b6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecb4 [ 30.537428] memcg:ffff888013fa3801 [ 30.537851] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.538496] page_type: 0xffffffff() [ 30.538943] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.539857] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013fa3801 [ 30.540759] page dumped because: kasan: bad access detected [ 30.541425] [ 30.541640] Memory state around the buggy address: [ 30.542213] ffff88800ecb4780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.543063] ffff88800ecb4800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.543907] >ffff88800ecb4880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.544750] ^ [ 30.545160] ffff88800ecb4900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.546130] ffff88800ecb4980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.547014] ================================================================== [ 30.548107] Disabling lock debugging due to kernel taint [ 32.425465] BUG: Bad rss-counter state mm:00000000433d22c7 type:MM_FILEPAGES val:33 [ 32.426468] BUG: Bad rss-counter state mm:00000000433d22c7 type:MM_ANONPAGES val:22 [ 32.860364] BUG: Bad rss-counter state mm:0000000029fafc17 type:MM_FILEPAGES val:33 [ 32.862008] BUG: Bad rss-counter state mm:0000000029fafc17 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38925' (ECDSA) to the list of known hosts. 2023/06/20 23:26:51 fuzzer started 2023/06/20 23:26:51 dialing manager at localhost:36067 2023/06/20 23:26:51 checking machine... 2023/06/20 23:26:51 checking revisions... [ 33.580373] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:26:51 testing simple program... [ 33.630841] cgroup: Unknown subsys name 'net' [ 33.668823] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:26:51 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000282 RCX=00000000800d000c RDX=0000000000000001 RSI=ffffea0000382680 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff888009477a00 R8 =00000000800d000c R9 =0000000000000000 R10=ffffea0000382680 R11=00000000000d000c R12=ffff88800844f780 R13=ffffea0000382680 R14=ffff88800844f780 R15=0000000000000001 RIP=ffffffff81806246 RFL=00000082 [--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 00007f10cb81e900 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=00007ffcbfbc1000 CR3=000000001bd44000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180ca5a RBX=0000000000000002 RCX=ffffffff86139701 RDX=ffff88806cf09ae0 RSI=ffffffff8180ca5a RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86139748 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020f03 R12=ffff88806cf09b60 R13=ffff88806cf09ae0 R14=ffff888008d951c0 R15=ffff88806cf09a98 RIP=ffffffff81130641 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=00007f99292f0570 CR3=0000000019fe6000 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=2030353a36323a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a36323a3332203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000