syzkaller login: [ 38.731813] BUG: Bad rss-counter state mm:00000000f59724d3 type:MM_FILEPAGES val:33 [ 38.733391] BUG: Bad rss-counter state mm:00000000f59724d3 type:MM_ANONPAGES val:22 [ 38.895081] ================================================================== [ 38.895999] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.896938] Read of size 8 at addr ffff88800f6b26b0 by task sshd/219 [ 38.897806] [ 38.898023] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.898898] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.899872] Call Trace: [ 38.900195] [ 38.900490] dump_stack_lvl+0x91/0xf0 [ 38.900976] print_report+0xcc/0x620 [ 38.901466] ? __virt_addr_valid+0x102/0x340 [ 38.902024] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.902652] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.903269] kasan_report+0xbe/0xf0 [ 38.903757] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.904384] vma_interval_tree_remove+0xc75/0xec0 [ 38.904997] vma_prepare+0xc54/0x11a0 [ 38.905473] __split_vma+0x5af/0x950 [ 38.905958] ? __pfx___split_vma+0x10/0x10 [ 38.906503] ? find_held_lock+0x2c/0x110 [ 38.907033] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.907593] ? lock_is_held_type+0x9f/0x120 [ 38.908127] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.908724] ? mtree_range_walk+0x632/0x900 [ 38.909270] ? mas_walk+0x5c7/0x7c0 [ 38.909740] do_vmi_munmap+0x1f1/0x2b0 [ 38.910230] mmap_region+0x1f9/0x2660 [ 38.910715] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.911226] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.911929] ? __pfx_lock_acquire+0x10/0x10 [ 38.912456] ? __pfx_mmap_region+0x10/0x10 [ 38.912985] ? security_mmap_addr+0x7d/0xa0 [ 38.913511] ? get_unmapped_area+0x1f5/0x3f0 [ 38.914059] do_mmap+0x854/0xf00 [ 38.914502] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.914993] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.915547] ksys_mmap_pgoff+0x3af/0x500 [ 38.916047] do_syscall_64+0x3f/0x90 [ 38.916521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.917167] RIP: 0033:0x7f2d4948fd82 [ 38.917620] 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 [ 38.919739] RSP: 002b:00007ffc372c23a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.920638] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2d4948fd82 [ 38.921475] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2d488c9000 [ 38.922320] RBP: 00007f2d488c9000 R08: 0000000000000009 R09: 0000000000001000 [ 38.923177] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bdd7a98ec0 [ 38.924020] R13: 00007ffc372c23c0 R14: 00007ffc372c23f0 R15: 00007ffc372c2750 [ 38.924871] [ 38.925161] [ 38.925378] Allocated by task 212: [ 38.925804] kasan_save_stack+0x22/0x50 [ 38.926312] kasan_set_track+0x25/0x30 [ 38.926824] __kasan_slab_alloc+0x59/0x70 [ 38.927344] kmem_cache_alloc+0x16b/0x370 [ 38.927858] vm_area_dup+0x20/0x160 [ 38.928320] __split_vma+0x170/0x950 [ 38.928789] split_vma+0xc6/0x110 [ 38.929237] mprotect_fixup+0x8d2/0xb30 [ 38.929738] do_mprotect_pkey+0x87e/0xd40 [ 38.930262] __x64_sys_mprotect+0x78/0xc0 [ 38.930792] do_syscall_64+0x3f/0x90 [ 38.931271] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.931909] [ 38.932121] Freed by task 212: [ 38.932514] kasan_save_stack+0x22/0x50 [ 38.933022] kasan_set_track+0x25/0x30 [ 38.933511] kasan_save_free_info+0x2b/0x50 [ 38.934055] __kasan_slab_free+0x10a/0x190 [ 38.934600] kmem_cache_free+0x10d/0x4d0 [ 38.935109] rcu_core+0x8c8/0x2860 [ 38.935554] __do_softirq+0x1b7/0x7d4 [ 38.936030] [ 38.936242] Last potentially related work creation: [ 38.936824] kasan_save_stack+0x22/0x50 [ 38.937329] __kasan_record_aux_stack+0x8e/0xa0 [ 38.937897] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.938553] remove_vma+0x139/0x170 [ 38.939008] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.939561] do_vmi_munmap+0x1f1/0x2b0 [ 38.940043] __vm_munmap+0x138/0x3a0 [ 38.940504] __x64_sys_munmap+0x59/0x80 [ 38.940997] do_syscall_64+0x3f/0x90 [ 38.941462] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.942107] [ 38.942322] The buggy address belongs to the object at ffff88800f6b2658 [ 38.942322] which belongs to the cache vm_area_struct of size 168 [ 38.943782] The buggy address is located 88 bytes inside of [ 38.943782] freed 168-byte region [ffff88800f6b2658, ffff88800f6b2700) [ 38.945179] [ 38.945395] The buggy address belongs to the physical page: [ 38.946053] page:00000000c07e8102 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf6b2 [ 38.947168] memcg:ffff888016a4e301 [ 38.947601] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.948255] page_type: 0xffffffff() [ 38.948716] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.949657] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a4e301 [ 38.950588] page dumped because: kasan: bad access detected [ 38.951247] [ 38.951470] Memory state around the buggy address: [ 38.952067] ffff88800f6b2580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.952923] ffff88800f6b2600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.953785] >ffff88800f6b2680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.954639] ^ [ 38.955227] ffff88800f6b2700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.956079] ffff88800f6b2780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.956925] ================================================================== [ 38.957885] Disabling lock debugging due to kernel taint [ 40.940002] BUG: Bad rss-counter state mm:0000000033b7474d type:MM_FILEPAGES val:33 [ 40.941066] BUG: Bad rss-counter state mm:0000000033b7474d type:MM_ANONPAGES val:22 [ 41.445778] BUG: Bad rss-counter state mm:000000007fff3719 type:MM_FILEPAGES val:33 [ 41.447594] BUG: Bad rss-counter state mm:000000007fff3719 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1509' (ECDSA) to the list of known hosts. 2023/06/20 12:54:13 fuzzer started 2023/06/20 12:54:13 dialing manager at localhost:36067 2023/06/20 12:54:13 checking machine... 2023/06/20 12:54:13 checking revisions... [ 42.191853] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:54:13 testing simple program... [ 42.242760] cgroup: Unknown subsys name 'net' [ 42.301953] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:54:13 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fe16f738650 CR3=000000000e69e000 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=34353a3231203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732032313a3435 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303131 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100207f719 RBX=ffff8880103fb8b8 RCX=1ffff110012f8cf8 RDX=dffffc0000000000 RSI=ffff8880097c55d0 RDI=ffff8880103fb8e8 RBP=ffff8880103fb8c8 RSP=ffff888010317a28 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff8880097c5400 R13=0000000000000000 R14=ffff88800d5a8c28 R15=ffff88800d5a8be0 RIP=ffffffff818476c2 RFL=00000046 [---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 00007f0a08670900 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=00007f0a07b8e000 CR3=000000000ec7a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=084d9a33281485ee00000000000ae988 XMM05=5301241b608b43450000000000132e18 XMM06=806171799158d9670000000000131898 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000