syzkaller login: [ 36.734627] BUG: Bad rss-counter state mm:00000000be6c26e0 type:MM_FILEPAGES val:33 [ 36.735886] BUG: Bad rss-counter state mm:00000000be6c26e0 type:MM_ANONPAGES val:22 [ 36.823739] ================================================================== [ 36.824812] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.825920] Read of size 8 at addr ffff888018e25140 by task sshd/219 [ 36.826954] [ 36.827206] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.828067] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.829068] Call Trace: [ 36.829389] [ 36.829683] dump_stack_lvl+0x91/0xf0 [ 36.830179] print_report+0xcc/0x620 [ 36.830667] ? __virt_addr_valid+0x102/0x340 [ 36.831236] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.831849] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.832467] kasan_report+0xbe/0xf0 [ 36.832946] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.833563] vma_interval_tree_remove+0xc75/0xec0 [ 36.834178] vma_prepare+0xc54/0x11a0 [ 36.834655] __split_vma+0x5af/0x950 [ 36.835133] ? __pfx___split_vma+0x10/0x10 [ 36.835667] ? find_held_lock+0x2c/0x110 [ 36.836191] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.836757] ? lock_is_held_type+0x9f/0x120 [ 36.837292] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.837910] ? mtree_range_walk+0x632/0x900 [ 36.838466] ? mas_walk+0x5c7/0x7c0 [ 36.838941] do_vmi_munmap+0x1f1/0x2b0 [ 36.839431] mmap_region+0x1f9/0x2660 [ 36.839911] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.840428] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.841140] ? __pfx_lock_acquire+0x10/0x10 [ 36.841694] ? __pfx_mmap_region+0x10/0x10 [ 36.842227] ? security_mmap_addr+0x7d/0xa0 [ 36.842759] ? get_unmapped_area+0x1f5/0x3f0 [ 36.843309] do_mmap+0x854/0xf00 [ 36.843749] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.844245] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.844810] ksys_mmap_pgoff+0x3af/0x500 [ 36.845322] do_syscall_64+0x3f/0x90 [ 36.845812] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.846459] RIP: 0033:0x7f988d09dd82 [ 36.846914] 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 [ 36.849070] RSP: 002b:00007ffe19b7e1e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.849991] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f988d09dd82 [ 36.850849] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f988c4d7000 [ 36.851700] RBP: 00007f988c4d7000 R08: 0000000000000009 R09: 0000000000001000 [ 36.852545] R10: 0000000000000812 R11: 0000000000000206 R12: 000055812aebff70 [ 36.853397] R13: 00007ffe19b7e200 R14: 00007ffe19b7e230 R15: 00007ffe19b7e590 [ 36.854261] [ 36.854552] [ 36.854770] Allocated by task 212: [ 36.855202] kasan_save_stack+0x22/0x50 [ 36.855711] kasan_set_track+0x25/0x30 [ 36.856208] __kasan_slab_alloc+0x59/0x70 [ 36.856741] kmem_cache_alloc+0x16b/0x370 [ 36.857260] vm_area_dup+0x20/0x160 [ 36.857733] __split_vma+0x170/0x950 [ 36.858201] split_vma+0xc6/0x110 [ 36.858642] mprotect_fixup+0x8d2/0xb30 [ 36.859143] do_mprotect_pkey+0x87e/0xd40 [ 36.859667] __x64_sys_mprotect+0x78/0xc0 [ 36.860183] do_syscall_64+0x3f/0x90 [ 36.860662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.861312] [ 36.861530] Freed by task 212: [ 36.861930] kasan_save_stack+0x22/0x50 [ 36.862443] kasan_set_track+0x25/0x30 [ 36.862940] kasan_save_free_info+0x2b/0x50 [ 36.863477] __kasan_slab_free+0x10a/0x190 [ 36.864015] kmem_cache_free+0x10d/0x4d0 [ 36.864533] rcu_core+0x8c8/0x2860 [ 36.864980] __do_softirq+0x1b7/0x7d4 [ 36.865458] [ 36.865687] Last potentially related work creation: [ 36.866279] kasan_save_stack+0x22/0x50 [ 36.866790] __kasan_record_aux_stack+0x8e/0xa0 [ 36.867373] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.868103] remove_vma+0x139/0x170 [ 36.868563] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.869129] do_vmi_munmap+0x1f1/0x2b0 [ 36.869633] __vm_munmap+0x138/0x3a0 [ 36.870102] __x64_sys_munmap+0x59/0x80 [ 36.870598] do_syscall_64+0x3f/0x90 [ 36.871069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.871716] [ 36.871931] The buggy address belongs to the object at ffff888018e250e8 [ 36.871931] which belongs to the cache vm_area_struct of size 168 [ 36.873414] The buggy address is located 88 bytes inside of [ 36.873414] freed 168-byte region [ffff888018e250e8, ffff888018e25190) [ 36.874831] [ 36.875052] The buggy address belongs to the physical page: [ 36.875720] page:000000003aac09a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18e25 [ 36.876827] memcg:ffff88800de80001 [ 36.877256] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.877940] page_type: 0xffffffff() [ 36.878403] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.879336] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de80001 [ 36.880248] page dumped because: kasan: bad access detected [ 36.880908] [ 36.881128] Memory state around the buggy address: [ 36.881719] ffff888018e25000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.882588] ffff888018e25080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 36.883450] >ffff888018e25100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.884321] ^ [ 36.884963] ffff888018e25180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 36.885843] ffff888018e25200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 36.886698] ================================================================== [ 36.887660] Disabling lock debugging due to kernel taint [ 39.473259] BUG: Bad rss-counter state mm:0000000028f45866 type:MM_FILEPAGES val:33 [ 39.474198] BUG: Bad rss-counter state mm:0000000028f45866 type:MM_ANONPAGES val:22 [ 39.959535] BUG: Bad rss-counter state mm:00000000507f36a7 type:MM_FILEPAGES val:33 [ 39.960569] BUG: Bad rss-counter state mm:00000000507f36a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33509' (ECDSA) to the list of known hosts. 2023/06/19 12:52:28 fuzzer started 2023/06/19 12:52:28 dialing manager at localhost:44161 2023/06/19 12:52:28 checking machine... 2023/06/19 12:52:28 checking revisions... [ 40.641313] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:52:28 testing simple program... [ 40.686691] cgroup: Unknown subsys name 'net' [ 40.721927] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:52:26 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888016967a00 RCX=0000000080000000 RDX=ffff888015930000 RSI=ffffffff83677b00 RDI=0000000000000001 RBP=0000000000000000 RSP=ffff888015abf918 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800c7ff0c0 R13=0000000000000000 R14=0000000000000000 R15=ffff888016967a00 RIP=ffffffff814c07f1 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 00007f104642d700 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=00007f2e771f2eb0 CR3=00000000145ca000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a32373734332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323737 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=0000000080000000 RBX=0000000000000002 RCX=ffffffff84494221 RDX=ffff8880169451c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000009 RSP=ffff88800ffa7060 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000003 R11=ffff8002b882c000 R12=ffff88800ffa7968 R13=ffff88800ffa7510 R14=ffff88800ffa7708 R15=ffff88800ffa74b0 RIP=ffffffff814c07eb 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 00007fa1327e4900 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=00007fa1327ae008 CR3=0000000015b0a000 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=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