[ 23.770715] BUG: Bad rss-counter state mm:000000005f19ab3a type:MM_FILEPAGES val:33 [ 23.771522] BUG: Bad rss-counter state mm:000000005f19ab3a type:MM_ANONPAGES val:22 [ 23.875489] ================================================================== [ 23.876291] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.877134] Read of size 8 at addr ffff88801b8db4e0 by task sshd/220 [ 23.877785] [ 23.877970] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.878728] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.879543] Call Trace: [ 23.879824] [ 23.880297] dump_stack_lvl+0x91/0xf0 [ 23.880724] print_report+0xcc/0x620 [ 23.881121] ? __virt_addr_valid+0x102/0x340 [ 23.881617] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.882120] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.882787] kasan_report+0xbe/0xf0 [ 23.883106] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.883485] vma_interval_tree_remove+0xc75/0xec0 [ 23.883860] vma_prepare+0xc54/0x11a0 [ 23.884154] __split_vma+0x5af/0x950 [ 23.884444] ? __pfx___split_vma+0x10/0x10 [ 23.884773] ? find_held_lock+0x2c/0x110 [ 23.885074] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.885418] ? lock_is_held_type+0x9f/0x120 [ 23.885718] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.886075] ? mtree_range_walk+0x632/0x900 [ 23.886407] ? mas_walk+0x5c7/0x7c0 [ 23.886696] do_vmi_munmap+0x1f1/0x2b0 [ 23.886983] mmap_region+0x1f9/0x2660 [ 23.887256] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.887549] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.887954] ? __pfx_lock_acquire+0x10/0x10 [ 23.888276] ? __pfx_mmap_region+0x10/0x10 [ 23.888602] ? security_mmap_addr+0x7d/0xa0 [ 23.888931] ? get_unmapped_area+0x1f5/0x3f0 [ 23.889272] do_mmap+0x854/0xf00 [ 23.889541] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.889849] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.890196] ksys_mmap_pgoff+0x3af/0x500 [ 23.890507] do_syscall_64+0x3f/0x90 [ 23.890814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.891218] RIP: 0033:0x7f41871abd82 [ 23.891500] 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 [ 23.892834] RSP: 002b:00007ffd525cb2b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.893395] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f41871abd82 [ 23.893920] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f41865e5000 [ 23.894442] RBP: 00007f41865e5000 R08: 0000000000000009 R09: 0000000000001000 [ 23.894961] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561c19f5dd90 [ 23.895441] R13: 00007ffd525cb2d0 R14: 00007ffd525cb300 R15: 00007ffd525cb660 [ 23.895949] [ 23.896111] [ 23.896231] Allocated by task 211: [ 23.896474] kasan_save_stack+0x22/0x50 [ 23.896774] kasan_set_track+0x25/0x30 [ 23.897070] __kasan_slab_alloc+0x59/0x70 [ 23.897439] kmem_cache_alloc+0x16b/0x370 [ 23.897798] vm_area_dup+0x20/0x160 [ 23.898091] __split_vma+0x170/0x950 [ 23.898376] split_vma+0xc6/0x110 [ 23.898689] mprotect_fixup+0x8d2/0xb30 [ 23.899006] do_mprotect_pkey+0x87e/0xd40 [ 23.899355] __x64_sys_mprotect+0x78/0xc0 [ 23.899708] do_syscall_64+0x3f/0x90 [ 23.900022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.900426] [ 23.900568] Freed by task 204: [ 23.900842] kasan_save_stack+0x22/0x50 [ 23.901201] kasan_set_track+0x25/0x30 [ 23.901516] kasan_save_free_info+0x2b/0x50 [ 23.901874] __kasan_slab_free+0x10a/0x190 [ 23.902242] kmem_cache_free+0x10d/0x4d0 [ 23.902622] rcu_core+0x8c8/0x2860 [ 23.902896] __do_softirq+0x1b7/0x7d4 [ 23.903199] [ 23.903338] Last potentially related work creation: [ 23.903713] kasan_save_stack+0x22/0x50 [ 23.904035] __kasan_record_aux_stack+0x8e/0xa0 [ 23.904376] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.904739] remove_vma+0x139/0x170 [ 23.904990] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.905311] do_vmi_munmap+0x1f1/0x2b0 [ 23.905591] __vm_munmap+0x138/0x3a0 [ 23.905855] __x64_sys_munmap+0x59/0x80 [ 23.906138] do_syscall_64+0x3f/0x90 [ 23.906409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.906783] [ 23.906910] The buggy address belongs to the object at ffff88801b8db488 [ 23.906910] which belongs to the cache vm_area_struct of size 168 [ 23.907768] The buggy address is located 88 bytes inside of [ 23.907768] freed 168-byte region [ffff88801b8db488, ffff88801b8db530) [ 23.908575] [ 23.908695] The buggy address belongs to the physical page: [ 23.909075] page:000000007165ed6f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b8db [ 23.909723] memcg:ffff88801b8cb401 [ 23.909962] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.910328] page_type: 0xffffffff() [ 23.910597] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.911124] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b8cb401 [ 23.911695] page dumped because: kasan: bad access detected [ 23.912068] [ 23.912188] Memory state around the buggy address: [ 23.912517] ffff88801b8db380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.913013] ffff88801b8db400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 23.913519] >ffff88801b8db480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.914076] ^ [ 23.914591] ffff88801b8db500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 23.915138] ffff88801b8db580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.915675] ================================================================== [ 23.916292] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.537429] BUG: Bad rss-counter state mm:00000000d85a8225 type:MM_FILEPAGES val:33 [ 25.538003] BUG: Bad rss-counter state mm:00000000d85a8225 type:MM_ANONPAGES val:22 [ 25.884227] BUG: Bad rss-counter state mm:000000005e021379 type:MM_FILEPAGES val:33 [ 25.884924] BUG: Bad rss-counter state mm:000000005e021379 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35621' (ECDSA) to the list of known hosts. 2023/06/21 00:14:50 fuzzer started 2023/06/21 00:14:50 dialing manager at localhost:36067 2023/06/21 00:14:50 checking machine... 2023/06/21 00:14:50 checking revisions... [ 26.444673] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:14:50 testing simple program... [ 26.475862] cgroup: Unknown subsys name 'net' [ 26.542085] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:14:50 Registers: info registers vcpu 0 RAX=ffffffff81ef57e8 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c1346 RSI=ffffffff81ef57e8 RDI=ffff88806ce09aa0 RBP=ffff88806ce09a70 RSP=ffff88806ce099c8 R8 =0000000000000001 R9 =ffff88806ce09a18 R10=0000000000038001 R11=0000000000020d0f R12=ffff88806ce09aa0 R13=0000000000000000 R14=ffff88800ffad1c0 R15=ffff888015fe36c0 RIP=ffffffff84538446 RFL=00000286 [--S--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 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=00007fe10ee82328 CR3=000000001b9bc000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffff88800c567830 RDX=0000000000000001 RSI=1ffff110018acef4 RDI=ffff88800c567790 RBP=ffff88800c5677e8 RSP=ffff88800c5676d0 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88800c567790 R11=00000000000b6a61 R12=ffff88800c5677f0 R13=ffff88800c5677d8 R14=ffff88800c5677d1 R15=ffff88800c567790 RIP=ffffffff811306ec 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=00007fd1f6c2f1e0 CR3=000000000d64a000 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=77daf2be8232a3ba7245cfce21df0252 XMM02=ec2efd57dc4c00df000000000011b290 XMM03=11d3689d85b88b38000000000011b360 XMM04=f0a1a6d937dcac4a00000000000ae988 XMM05=19e9129bd510f23500000000001310f8 XMM06=741bff7c55031e9500000000001302d0 XMM07=e042d86d42eb936e0000000000121858 XMM08=11d3689d85b88b38000000000011b360 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000