syzkaller login: [ 30.757500] BUG: Bad rss-counter state mm:00000000a8887029 type:MM_FILEPAGES val:33 [ 30.758259] BUG: Bad rss-counter state mm:00000000a8887029 type:MM_ANONPAGES val:22 [ 30.873697] ================================================================== [ 30.874418] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.875152] Read of size 8 at addr ffff8880181796b0 by task sshd/220 [ 30.875744] [ 30.875914] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.876651] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.877428] Call Trace: [ 30.877680] [ 30.877899] dump_stack_lvl+0x91/0xf0 [ 30.878282] print_report+0xcc/0x620 [ 30.878666] ? __virt_addr_valid+0x102/0x340 [ 30.879090] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.879572] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.880053] kasan_report+0xbe/0xf0 [ 30.880422] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.880927] vma_interval_tree_remove+0xc75/0xec0 [ 30.881389] vma_prepare+0xc54/0x11a0 [ 30.881756] __split_vma+0x5af/0x950 [ 30.882031] ? __pfx___split_vma+0x10/0x10 [ 30.882321] ? find_held_lock+0x2c/0x110 [ 30.882610] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.882931] ? lock_is_held_type+0x9f/0x120 [ 30.883250] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.883615] ? mtree_range_walk+0x632/0x900 [ 30.883948] ? mas_walk+0x5c7/0x7c0 [ 30.884229] do_vmi_munmap+0x1f1/0x2b0 [ 30.884521] mmap_region+0x1f9/0x2660 [ 30.884812] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.885117] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.885550] ? __pfx_lock_acquire+0x10/0x10 [ 30.885867] ? __pfx_mmap_region+0x10/0x10 [ 30.886182] ? security_mmap_addr+0x7d/0xa0 [ 30.886499] ? get_unmapped_area+0x1f5/0x3f0 [ 30.886833] do_mmap+0x854/0xf00 [ 30.887085] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.887378] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.887712] ksys_mmap_pgoff+0x3af/0x500 [ 30.888012] do_syscall_64+0x3f/0x90 [ 30.888297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.888686] RIP: 0033:0x7f28e01ded82 [ 30.888958] 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 [ 30.890219] RSP: 002b:00007fff6492f188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.890766] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f28e01ded82 [ 30.891275] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f28df618000 [ 30.891786] RBP: 00007f28df618000 R08: 0000000000000009 R09: 0000000000001000 [ 30.892285] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561bc548aec0 [ 30.892797] R13: 00007fff6492f1a0 R14: 00007fff6492f1d0 R15: 00007fff6492f530 [ 30.893312] [ 30.893486] [ 30.893613] Allocated by task 213: [ 30.893865] kasan_save_stack+0x22/0x50 [ 30.894158] kasan_set_track+0x25/0x30 [ 30.894452] __kasan_slab_alloc+0x59/0x70 [ 30.894762] kmem_cache_alloc+0x16b/0x370 [ 30.895062] vm_area_dup+0x20/0x160 [ 30.895332] __split_vma+0x170/0x950 [ 30.895606] split_vma+0xc6/0x110 [ 30.895866] mprotect_fixup+0x8d2/0xb30 [ 30.896154] do_mprotect_pkey+0x87e/0xd40 [ 30.896464] __x64_sys_mprotect+0x78/0xc0 [ 30.896770] do_syscall_64+0x3f/0x90 [ 30.897056] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.897435] [ 30.897561] Freed by task 13: [ 30.897786] kasan_save_stack+0x22/0x50 [ 30.898081] kasan_set_track+0x25/0x30 [ 30.898366] kasan_save_free_info+0x2b/0x50 [ 30.898681] __kasan_slab_free+0x10a/0x190 [ 30.898987] kmem_cache_free+0x10d/0x4d0 [ 30.899286] rcu_core+0x8c8/0x2860 [ 30.899543] __do_softirq+0x1b7/0x7d4 [ 30.899825] [ 30.899949] Last potentially related work creation: [ 30.900296] kasan_save_stack+0x22/0x50 [ 30.900594] __kasan_record_aux_stack+0x8e/0xa0 [ 30.900931] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.901311] remove_vma+0x139/0x170 [ 30.901576] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.901904] do_vmi_munmap+0x1f1/0x2b0 [ 30.902185] __vm_munmap+0x138/0x3a0 [ 30.902454] __x64_sys_munmap+0x59/0x80 [ 30.902750] do_syscall_64+0x3f/0x90 [ 30.903030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.903407] [ 30.903538] The buggy address belongs to the object at ffff888018179658 [ 30.903538] which belongs to the cache vm_area_struct of size 168 [ 30.904398] The buggy address is located 88 bytes inside of [ 30.904398] freed 168-byte region [ffff888018179658, ffff888018179700) [ 30.905239] [ 30.905365] The buggy address belongs to the physical page: [ 30.905761] page:00000000bf68b406 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18179 [ 30.906412] memcg:ffff888016940801 [ 30.906666] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.907046] page_type: 0xffffffff() [ 30.907314] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.907864] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016940801 [ 30.908411] page dumped because: kasan: bad access detected [ 30.908797] [ 30.908933] Memory state around the buggy address: [ 30.909267] ffff888018179580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.909782] ffff888018179600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.910280] >ffff888018179680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.910789] ^ [ 30.911127] ffff888018179700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.911652] ffff888018179780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.912152] ================================================================== [ 30.912714] Disabling lock debugging due to kernel taint [ 33.093174] BUG: Bad rss-counter state mm:000000008084d90b type:MM_FILEPAGES val:33 [ 33.094761] BUG: Bad rss-counter state mm:000000008084d90b type:MM_ANONPAGES val:22 [ 33.646970] BUG: Bad rss-counter state mm:00000000b6b3ca73 type:MM_FILEPAGES val:33 [ 33.648165] BUG: Bad rss-counter state mm:00000000b6b3ca73 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6770' (ECDSA) to the list of known hosts. 2023/06/20 19:07:14 fuzzer started 2023/06/20 19:07:15 dialing manager at localhost:36067 2023/06/20 19:07:15 checking machine... 2023/06/20 19:07:15 checking revisions... [ 34.290772] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:07:15 testing simple program... [ 34.347946] cgroup: Unknown subsys name 'net' [ 34.392698] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:07:14 Registers: info registers vcpu 0 RAX=ffffffff8613871e RBX=ffffffff85dfdb28 RCX=ffffffff81808487 RDX=0000000000000000 RSI=ffffffff86138712 RDI=ffffffff85dfdb20 RBP=ffffffff85dfdb2c RSP=ffff88800c98f5e0 R8 =ffffffff86138712 R9 =ffff88800c98f6d8 R10=0000000000038001 R11=0000000000020c57 R12=ffffffff85dfdb28 R13=ffffffff85dfdb20 R14=0000000000000002 R15=dffffc0000000000 RIP=ffffffff8112fcb3 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 00007f48a909e900 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=00007ffdae54c000 CR3=0000000019c86000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007f017c834500 CR3=000000000fe02000 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=2034313a37303a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a37303a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000