syzkaller login: [ 30.789802] BUG: Bad rss-counter state mm:0000000018b4d94a type:MM_FILEPAGES val:33 [ 30.791001] BUG: Bad rss-counter state mm:0000000018b4d94a type:MM_ANONPAGES val:22 [ 30.830411] ================================================================== [ 30.831580] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.832773] Read of size 8 at addr ffff88800f48aa50 by task sshd/221 [ 30.833559] [ 30.833775] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.834821] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.835994] Call Trace: [ 30.836318] [ 30.836609] dump_stack_lvl+0x91/0xf0 [ 30.837121] print_report+0xcc/0x620 [ 30.837602] ? __virt_addr_valid+0x102/0x340 [ 30.838181] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.838836] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.839488] kasan_report+0xbe/0xf0 [ 30.839976] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.840604] vma_interval_tree_remove+0xc75/0xec0 [ 30.841227] vma_prepare+0xc54/0x11a0 [ 30.841712] __split_vma+0x5af/0x950 [ 30.842215] ? __pfx___split_vma+0x10/0x10 [ 30.842788] ? find_held_lock+0x2c/0x110 [ 30.843334] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.843905] ? lock_is_held_type+0x9f/0x120 [ 30.844459] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.845103] ? mtree_range_walk+0x632/0x900 [ 30.845663] ? mas_walk+0x5c7/0x7c0 [ 30.846172] do_vmi_munmap+0x1f1/0x2b0 [ 30.846678] mmap_region+0x1f9/0x2660 [ 30.847196] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.847709] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.848432] ? __pfx_lock_acquire+0x10/0x10 [ 30.848989] ? __pfx_mmap_region+0x10/0x10 [ 30.849513] ? security_mmap_addr+0x7d/0xa0 [ 30.850064] ? get_unmapped_area+0x1f5/0x3f0 [ 30.850617] do_mmap+0x854/0xf00 [ 30.851108] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.851611] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.852196] ksys_mmap_pgoff+0x3af/0x500 [ 30.852714] do_syscall_64+0x3f/0x90 [ 30.853218] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.853873] RIP: 0033:0x7f2bc8551d82 [ 30.854340] 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 [ 30.856528] RSP: 002b:00007ffe12d822d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.857692] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2bc8551d82 [ 30.858606] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2bc798b000 [ 30.859491] RBP: 00007f2bc798b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.860343] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c160972ec0 [ 30.861210] R13: 00007ffe12d822f0 R14: 00007ffe12d82320 R15: 00007ffe12d82680 [ 30.862098] [ 30.862393] [ 30.862604] Allocated by task 214: [ 30.863078] kasan_save_stack+0x22/0x50 [ 30.863587] kasan_set_track+0x25/0x30 [ 30.864100] __kasan_slab_alloc+0x59/0x70 [ 30.864633] kmem_cache_alloc+0x16b/0x370 [ 30.865158] vm_area_dup+0x20/0x160 [ 30.865613] __split_vma+0x170/0x950 [ 30.866096] split_vma+0xc6/0x110 [ 30.866535] mprotect_fixup+0x8d2/0xb30 [ 30.867076] do_mprotect_pkey+0x87e/0xd40 [ 30.867600] __x64_sys_mprotect+0x78/0xc0 [ 30.868134] do_syscall_64+0x3f/0x90 [ 30.868608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.869267] [ 30.869486] Freed by task 214: [ 30.869883] kasan_save_stack+0x22/0x50 [ 30.870401] kasan_set_track+0x25/0x30 [ 30.870937] kasan_save_free_info+0x2b/0x50 [ 30.871486] __kasan_slab_free+0x10a/0x190 [ 30.872034] kmem_cache_free+0x10d/0x4d0 [ 30.872543] rcu_core+0x8c8/0x2860 [ 30.873007] __do_softirq+0x1b7/0x7d4 [ 30.873486] [ 30.873702] Last potentially related work creation: [ 30.874309] kasan_save_stack+0x22/0x50 [ 30.874833] __kasan_record_aux_stack+0x8e/0xa0 [ 30.875505] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.876163] remove_vma+0x139/0x170 [ 30.876615] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.877180] do_vmi_munmap+0x1f1/0x2b0 [ 30.877667] __vm_munmap+0x138/0x3a0 [ 30.878157] __x64_sys_munmap+0x59/0x80 [ 30.878651] do_syscall_64+0x3f/0x90 [ 30.879169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.879806] [ 30.880040] The buggy address belongs to the object at ffff88800f48a9f8 [ 30.880040] which belongs to the cache vm_area_struct of size 168 [ 30.881564] The buggy address is located 88 bytes inside of [ 30.881564] freed 168-byte region [ffff88800f48a9f8, ffff88800f48aaa0) [ 30.883089] [ 30.883315] The buggy address belongs to the physical page: [ 30.884028] page:000000003bdc4ef9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf48a [ 30.885169] memcg:ffff888015a1c701 [ 30.885610] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.886312] page_type: 0xffffffff() [ 30.886798] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.887782] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a1c701 [ 30.888754] page dumped because: kasan: bad access detected [ 30.889426] [ 30.889646] Memory state around the buggy address: [ 30.890246] ffff88800f48a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.891145] ffff88800f48a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.892011] >ffff88800f48aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.892853] ^ [ 30.893584] ffff88800f48aa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.894455] ffff88800f48ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.895352] ================================================================== [ 30.896334] Disabling lock debugging due to kernel taint [ 32.849834] BUG: Bad rss-counter state mm:000000001ae787fa type:MM_FILEPAGES val:33 [ 32.851274] BUG: Bad rss-counter state mm:000000001ae787fa type:MM_ANONPAGES val:22 [ 33.479225] BUG: Bad rss-counter state mm:0000000096c6dee3 type:MM_FILEPAGES val:33 [ 33.480567] BUG: Bad rss-counter state mm:0000000096c6dee3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8420' (ECDSA) to the list of known hosts. 2023/06/20 13:56:00 fuzzer started 2023/06/20 13:56:00 dialing manager at localhost:36067 2023/06/20 13:56:00 checking machine... 2023/06/20 13:56:00 checking revisions... [ 34.133506] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:56:00 testing simple program... [ 34.185941] cgroup: Unknown subsys name 'net' [ 34.222184] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:56:00 Registers: info registers vcpu 0 RAX=00007fca259b4440 RBX=00007ffece13aab0 RCX=00007fca259b3f20 RDX=00007fca252fd558 RSI=00007ffece13a950 RDI=000000000000000b RBP=00007ffece13abe0 RSP=00007ffece13a950 R8 =0000000000000000 R9 =00007ffece13aae0 R10=000000000000002c R11=0000000200000000 R12=0000000000000000 R13=0000000000000000 R14=000000000000002c R15=0000000000000000 RIP=00007fca25dccab2 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fca25241900 00000000 00000000 GS =0000 0000000000000000 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=0000561993fd9c8c CR3=000000001999a000 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=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=00007fec9b8c66f0 CR3=000000000c83c000 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=2039353a35353a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a35353a3331203032 XMM08=7020303d64696720303d64697520612f XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000