syzkaller login: [ 38.717702] BUG: Bad rss-counter state mm:00000000124ebf1e type:MM_FILEPAGES val:33 [ 38.718956] BUG: Bad rss-counter state mm:00000000124ebf1e type:MM_ANONPAGES val:22 [ 38.865145] ================================================================== [ 38.866051] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.866979] Read of size 8 at addr ffff8880101d3880 by task sshd/218 [ 38.867859] [ 38.868084] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.868944] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.869908] Call Trace: [ 38.870230] [ 38.870512] dump_stack_lvl+0x91/0xf0 [ 38.871002] print_report+0xcc/0x620 [ 38.871491] ? __virt_addr_valid+0x102/0x340 [ 38.872077] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.872709] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.873318] kasan_report+0xbe/0xf0 [ 38.873797] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.874423] vma_interval_tree_remove+0xc75/0xec0 [ 38.875037] vma_prepare+0xc54/0x11a0 [ 38.875512] __split_vma+0x5af/0x950 [ 38.875991] ? __pfx___split_vma+0x10/0x10 [ 38.876517] ? find_held_lock+0x2c/0x110 [ 38.877044] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.877608] ? lock_is_held_type+0x9f/0x120 [ 38.878155] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.878758] ? mtree_range_walk+0x632/0x900 [ 38.879308] ? mas_walk+0x5c7/0x7c0 [ 38.879782] do_vmi_munmap+0x1f1/0x2b0 [ 38.880285] mmap_region+0x1f9/0x2660 [ 38.880767] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.881275] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.881993] ? __pfx_lock_acquire+0x10/0x10 [ 38.882520] ? __pfx_mmap_region+0x10/0x10 [ 38.883046] ? security_mmap_addr+0x7d/0xa0 [ 38.883575] ? get_unmapped_area+0x1f5/0x3f0 [ 38.884144] do_mmap+0x854/0xf00 [ 38.884579] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.885087] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.885662] ksys_mmap_pgoff+0x3af/0x500 [ 38.886164] do_syscall_64+0x3f/0x90 [ 38.886656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.887322] RIP: 0033:0x7f2e368a1d82 [ 38.887781] 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 [ 38.890022] RSP: 002b:00007ffe2d927da8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.890981] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2e368a1d82 [ 38.891865] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2e35cdb000 [ 38.892715] RBP: 00007f2e35cdb000 R08: 0000000000000009 R09: 0000000000001000 [ 38.893571] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561b52711f60 [ 38.894417] R13: 00007ffe2d927dc0 R14: 00007ffe2d927df0 R15: 00007ffe2d928150 [ 38.895269] [ 38.895562] [ 38.895779] Allocated by task 211: [ 38.896223] kasan_save_stack+0x22/0x50 [ 38.896730] kasan_set_track+0x25/0x30 [ 38.897222] __kasan_slab_alloc+0x59/0x70 [ 38.897763] kmem_cache_alloc+0x16b/0x370 [ 38.898282] vm_area_dup+0x20/0x160 [ 38.898733] __split_vma+0x170/0x950 [ 38.899207] split_vma+0xc6/0x110 [ 38.899653] mprotect_fixup+0x8d2/0xb30 [ 38.900175] do_mprotect_pkey+0x87e/0xd40 [ 38.900716] __x64_sys_mprotect+0x78/0xc0 [ 38.901236] do_syscall_64+0x3f/0x90 [ 38.901715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.902370] [ 38.902584] Freed by task 13: [ 38.902969] kasan_save_stack+0x22/0x50 [ 38.903486] kasan_set_track+0x25/0x30 [ 38.904007] kasan_save_free_info+0x2b/0x50 [ 38.904544] __kasan_slab_free+0x10a/0x190 [ 38.905079] kmem_cache_free+0x10d/0x4d0 [ 38.905589] rcu_core+0x8c8/0x2860 [ 38.906042] __do_softirq+0x1b7/0x7d4 [ 38.906516] [ 38.906731] Last potentially related work creation: [ 38.907320] kasan_save_stack+0x22/0x50 [ 38.907852] __kasan_record_aux_stack+0x8e/0xa0 [ 38.908446] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.909102] remove_vma+0x139/0x170 [ 38.909559] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.910126] do_vmi_munmap+0x1f1/0x2b0 [ 38.910624] __vm_munmap+0x138/0x3a0 [ 38.911094] __x64_sys_munmap+0x59/0x80 [ 38.911603] do_syscall_64+0x3f/0x90 [ 38.912098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.912755] [ 38.912974] The buggy address belongs to the object at ffff8880101d3828 [ 38.912974] which belongs to the cache vm_area_struct of size 168 [ 38.914481] The buggy address is located 88 bytes inside of [ 38.914481] freed 168-byte region [ffff8880101d3828, ffff8880101d38d0) [ 38.915924] [ 38.916144] The buggy address belongs to the physical page: [ 38.916826] page:000000008c1139b0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101d3 [ 38.917946] memcg:ffff88800e136f01 [ 38.918380] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.919050] page_type: 0xffffffff() [ 38.919512] raw: 0100000000000200 ffff8880087a0c80 ffffea000037ef00 dead000000000004 [ 38.920446] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e136f01 [ 38.921360] page dumped because: kasan: bad access detected [ 38.922033] [ 38.922251] Memory state around the buggy address: [ 38.922837] ffff8880101d3780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 38.923694] ffff8880101d3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.924563] >ffff8880101d3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.925419] ^ [ 38.925830] ffff8880101d3900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.926691] ffff8880101d3980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 38.927542] ================================================================== [ 38.928800] Disabling lock debugging due to kernel taint [ 40.793665] BUG: Bad rss-counter state mm:00000000dc8fcca2 type:MM_FILEPAGES val:33 [ 40.794674] BUG: Bad rss-counter state mm:00000000dc8fcca2 type:MM_ANONPAGES val:22 [ 41.335925] BUG: Bad rss-counter state mm:0000000032175cc0 type:MM_FILEPAGES val:33 [ 41.337047] BUG: Bad rss-counter state mm:0000000032175cc0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42237' (ECDSA) to the list of known hosts. 2023/06/20 21:23:51 fuzzer started 2023/06/20 21:23:52 dialing manager at localhost:36067 2023/06/20 21:23:52 checking machine... 2023/06/20 21:23:52 checking revisions... [ 41.909258] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:23:52 testing simple program... [ 41.954206] cgroup: Unknown subsys name 'net' [ 42.030140] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:23:51 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=000000000000001f RCX=0000000080000000 RDX=ffff888015e63680 RSI=ffffffff81f57b85 RDI=0000000000000001 RBP=000000000000001f RSP=ffff88801631fa88 R8 =0000000000000000 R9 =ffff88801631fd68 R10=0000000000000001 R11=0000000000000000 R12=ffff88801631fd68 R13=0000000000000001 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff814c0871 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 00007f03df943900 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=00007ffc1fc83000 CR3=000000001ca10000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007fac99a74040 CR3=000000000d5a4000 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=28a582a3c4caea8539423d0861efbd52 XMM02=ec2efd57dc4c00df000000000011b368 XMM03=838c35fdde38e258000000000011b438 XMM04=20a4c899b2a8472a00000000000ae988 XMM05=751b9502027dc0b90000000000131908 XMM06=28b10f1d399701e20000000000130ae0 XMM07=e042d86d42eb936e0000000000122050 XMM08=838c35fdde38e258000000000011b438 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000