syzkaller login: [ 32.644088] BUG: Bad rss-counter state mm:000000004a2f85fa type:MM_FILEPAGES val:33 [ 32.646310] BUG: Bad rss-counter state mm:000000004a2f85fa type:MM_ANONPAGES val:22 [ 32.827470] ================================================================== [ 32.828828] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.829906] Read of size 8 at addr ffff88800fdfaed8 by task sshd/219 [ 32.830810] [ 32.831067] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.832068] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.833230] Call Trace: [ 32.833618] [ 32.833956] dump_stack_lvl+0x91/0xf0 [ 32.834540] print_report+0xcc/0x620 [ 32.835116] ? __virt_addr_valid+0x102/0x340 [ 32.835773] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.836528] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.837268] kasan_report+0xbe/0xf0 [ 32.837837] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.838585] vma_interval_tree_remove+0xc75/0xec0 [ 32.839311] vma_prepare+0xc54/0x11a0 [ 32.839883] __split_vma+0x5af/0x950 [ 32.840447] ? __pfx___split_vma+0x10/0x10 [ 32.841107] ? find_held_lock+0x2c/0x110 [ 32.841726] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.842407] ? lock_is_held_type+0x9f/0x120 [ 32.843063] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.843792] ? mtree_range_walk+0x632/0x900 [ 32.844451] ? mas_walk+0x5c7/0x7c0 [ 32.845048] do_vmi_munmap+0x1f1/0x2b0 [ 32.845645] mmap_region+0x1f9/0x2660 [ 32.846212] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.846801] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.847617] ? __pfx_lock_acquire+0x10/0x10 [ 32.848227] ? __pfx_mmap_region+0x10/0x10 [ 32.848867] ? security_mmap_addr+0x7d/0xa0 [ 32.849494] ? get_unmapped_area+0x1f5/0x3f0 [ 32.850163] do_mmap+0x854/0xf00 [ 32.850686] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.851281] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.851931] ksys_mmap_pgoff+0x3af/0x500 [ 32.852537] do_syscall_64+0x3f/0x90 [ 32.853104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.853865] RIP: 0033:0x7f28adfbad82 [ 32.854409] 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 [ 32.856952] RSP: 002b:00007ffd2321fca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.858033] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f28adfbad82 [ 32.859039] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f28ad3f4000 [ 32.860037] RBP: 00007f28ad3f4000 R08: 0000000000000009 R09: 0000000000001000 [ 32.861053] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fce9dd7ec0 [ 32.862060] R13: 00007ffd2321fcc0 R14: 00007ffd2321fcf0 R15: 00007ffd23220050 [ 32.863078] [ 32.863431] [ 32.863687] Allocated by task 212: [ 32.864191] kasan_save_stack+0x22/0x50 [ 32.864811] kasan_set_track+0x25/0x30 [ 32.865407] __kasan_slab_alloc+0x59/0x70 [ 32.866032] kmem_cache_alloc+0x16b/0x370 [ 32.866641] vm_area_dup+0x20/0x160 [ 32.867176] __split_vma+0x170/0x950 [ 32.867721] split_vma+0xc6/0x110 [ 32.868245] mprotect_fixup+0x8d2/0xb30 [ 32.868841] do_mprotect_pkey+0x87e/0xd40 [ 32.869449] __x64_sys_mprotect+0x78/0xc0 [ 32.870061] do_syscall_64+0x3f/0x90 [ 32.870617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.871377] [ 32.871632] Freed by task 212: [ 32.872091] kasan_save_stack+0x22/0x50 [ 32.872691] kasan_set_track+0x25/0x30 [ 32.873272] kasan_save_free_info+0x2b/0x50 [ 32.873889] __kasan_slab_free+0x10a/0x190 [ 32.874530] kmem_cache_free+0x10d/0x4d0 [ 32.875135] rcu_core+0x8c8/0x2860 [ 32.875654] __do_softirq+0x1b7/0x7d4 [ 32.876221] [ 32.876470] Last potentially related work creation: [ 32.877179] kasan_save_stack+0x22/0x50 [ 32.877770] __kasan_record_aux_stack+0x8e/0xa0 [ 32.878441] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.879195] remove_vma+0x139/0x170 [ 32.879725] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.880389] do_vmi_munmap+0x1f1/0x2b0 [ 32.880971] __vm_munmap+0x138/0x3a0 [ 32.881520] __x64_sys_munmap+0x59/0x80 [ 32.882105] do_syscall_64+0x3f/0x90 [ 32.882661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.883409] [ 32.883655] The buggy address belongs to the object at ffff88800fdfae80 [ 32.883655] which belongs to the cache vm_area_struct of size 168 [ 32.885371] The buggy address is located 88 bytes inside of [ 32.885371] freed 168-byte region [ffff88800fdfae80, ffff88800fdfaf28) [ 32.887013] [ 32.887267] The buggy address belongs to the physical page: [ 32.888029] page:0000000068624cb7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdfa [ 32.889316] memcg:ffff88800e014f01 [ 32.889808] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.890561] page_type: 0xffffffff() [ 32.891089] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.892152] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e014f01 [ 32.893184] page dumped because: kasan: bad access detected [ 32.893926] [ 32.894166] Memory state around the buggy address: [ 32.894810] ffff88800fdfad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.895763] ffff88800fdfae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.896748] >ffff88800fdfae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.897686] ^ [ 32.898490] ffff88800fdfaf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 32.899440] ffff88800fdfaf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.900403] ================================================================== [ 32.901667] Disabling lock debugging due to kernel taint [ 34.740077] BUG: Bad rss-counter state mm:00000000ba52e133 type:MM_FILEPAGES val:33 [ 34.741675] BUG: Bad rss-counter state mm:00000000ba52e133 type:MM_ANONPAGES val:22 [ 35.226290] BUG: Bad rss-counter state mm:0000000070d8ce63 type:MM_FILEPAGES val:33 [ 35.227264] BUG: Bad rss-counter state mm:0000000070d8ce63 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36961' (ECDSA) to the list of known hosts. 2023/06/20 05:21:42 fuzzer started 2023/06/20 05:21:42 dialing manager at localhost:44161 2023/06/20 05:21:42 checking machine... 2023/06/20 05:21:42 checking revisions... [ 35.960078] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:21:43 testing simple program... [ 36.014709] cgroup: Unknown subsys name 'net' [ 36.077797] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:21:40 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11001e95f49 RSI=ffffffff818e33b7 RDI=ffff88800f4af8c8 RBP=ffff88800f4af960 RSP=ffff88800f4af8c8 R8 =0000000000000001 R9 =ffff88800f4af908 R10=0000000000038001 R11=00000000000246c0 R12=ffff88800f4af990 R13=0000000000000000 R14=ffff88801a110000 R15=0000000000092c40 RIP=ffffffff810bd052 RFL=00000202 [-------] 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 00007ff3aa672900 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=00007ff3aac27650 CR3=00000000142cc000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=0000561ae7999c70 CR3=000000001813a000 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=31323a3530203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732032343a3132 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323834 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000