syzkaller login: [ 29.918715] BUG: Bad rss-counter state mm:0000000078fe2d91 type:MM_FILEPAGES val:33 [ 29.919759] BUG: Bad rss-counter state mm:0000000078fe2d91 type:MM_ANONPAGES val:22 [ 30.089884] ================================================================== [ 30.090977] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.092112] Read of size 8 at addr ffff888018252a50 by task sshd/219 [ 30.093051] [ 30.093295] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.094215] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.095259] Call Trace: [ 30.095598] [ 30.095928] dump_stack_lvl+0x91/0xf0 [ 30.096448] print_report+0xcc/0x620 [ 30.096964] ? __virt_addr_valid+0x102/0x340 [ 30.097559] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.098219] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.098876] kasan_report+0xbe/0xf0 [ 30.099383] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.100053] vma_interval_tree_remove+0xc75/0xec0 [ 30.100701] vma_prepare+0xc54/0x11a0 [ 30.101209] __split_vma+0x5af/0x950 [ 30.101715] ? __pfx___split_vma+0x10/0x10 [ 30.102281] ? find_held_lock+0x2c/0x110 [ 30.102841] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.103448] ? lock_is_held_type+0x9f/0x120 [ 30.104040] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.104698] ? mtree_range_walk+0x632/0x900 [ 30.105293] ? mas_walk+0x5c7/0x7c0 [ 30.105802] do_vmi_munmap+0x1f1/0x2b0 [ 30.106327] mmap_region+0x1f9/0x2660 [ 30.106842] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.107392] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.108160] ? __pfx_lock_acquire+0x10/0x10 [ 30.108734] ? __pfx_mmap_region+0x10/0x10 [ 30.109304] ? security_mmap_addr+0x7d/0xa0 [ 30.109876] ? get_unmapped_area+0x1f5/0x3f0 [ 30.110466] do_mmap+0x854/0xf00 [ 30.110932] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.111463] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.112074] ksys_mmap_pgoff+0x3af/0x500 [ 30.112614] do_syscall_64+0x3f/0x90 [ 30.113125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.113808] RIP: 0033:0x7f7705596d82 [ 30.114299] 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 [ 30.116612] RSP: 002b:00007ffd77e94ea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.117588] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7705596d82 [ 30.118494] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f77049d0000 [ 30.119402] RBP: 00007f77049d0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.120307] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aad8768ec0 [ 30.121210] R13: 00007ffd77e94ec0 R14: 00007ffd77e94ef0 R15: 00007ffd77e95250 [ 30.122129] [ 30.122438] [ 30.122672] Allocated by task 211: [ 30.123127] kasan_save_stack+0x22/0x50 [ 30.123671] kasan_set_track+0x25/0x30 [ 30.124220] __kasan_slab_alloc+0x59/0x70 [ 30.124784] kmem_cache_alloc+0x16b/0x370 [ 30.125336] vm_area_dup+0x20/0x160 [ 30.125817] __split_vma+0x170/0x950 [ 30.126318] split_vma+0xc6/0x110 [ 30.126788] mprotect_fixup+0x8d2/0xb30 [ 30.127326] do_mprotect_pkey+0x87e/0xd40 [ 30.127887] __x64_sys_mprotect+0x78/0xc0 [ 30.128442] do_syscall_64+0x3f/0x90 [ 30.128945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.129628] [ 30.129858] Freed by task 211: [ 30.130278] kasan_save_stack+0x22/0x50 [ 30.130812] kasan_set_track+0x25/0x30 [ 30.131339] kasan_save_free_info+0x2b/0x50 [ 30.131912] __kasan_slab_free+0x10a/0x190 [ 30.132484] kmem_cache_free+0x10d/0x4d0 [ 30.133022] rcu_core+0x8c8/0x2860 [ 30.133498] __do_softirq+0x1b7/0x7d4 [ 30.134066] [ 30.134294] Last potentially related work creation: [ 30.134925] kasan_save_stack+0x22/0x50 [ 30.135462] __kasan_record_aux_stack+0x8e/0xa0 [ 30.136078] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.136764] remove_vma+0x139/0x170 [ 30.137245] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.137838] do_vmi_munmap+0x1f1/0x2b0 [ 30.138357] __vm_munmap+0x138/0x3a0 [ 30.138852] __x64_sys_munmap+0x59/0x80 [ 30.139380] do_syscall_64+0x3f/0x90 [ 30.139889] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.140570] [ 30.140800] The buggy address belongs to the object at ffff8880182529f8 [ 30.140800] which belongs to the cache vm_area_struct of size 168 [ 30.142378] The buggy address is located 88 bytes inside of [ 30.142378] freed 168-byte region [ffff8880182529f8, ffff888018252aa0) [ 30.143887] [ 30.144125] The buggy address belongs to the physical page: [ 30.144833] page:000000001e58b995 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18252 [ 30.145998] memcg:ffff8880182c0c01 [ 30.146454] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.147146] page_type: 0xffffffff() [ 30.147630] raw: 0100000000000200 ffff88800879fc80 ffffea00003b7cc0 dead000000000006 [ 30.148627] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880182c0c01 [ 30.149589] page dumped because: kasan: bad access detected [ 30.150289] [ 30.150520] Memory state around the buggy address: [ 30.151146] ffff888018252900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.152076] ffff888018252980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.152998] >ffff888018252a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.153924] ^ [ 30.154676] ffff888018252a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 30.155593] ffff888018252b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.156522] ================================================================== [ 30.157553] Disabling lock debugging due to kernel taint [ 32.218473] BUG: Bad rss-counter state mm:0000000036433f56 type:MM_FILEPAGES val:33 [ 32.219679] BUG: Bad rss-counter state mm:0000000036433f56 type:MM_ANONPAGES val:22 [ 32.717259] BUG: Bad rss-counter state mm:0000000035a9f090 type:MM_FILEPAGES val:33 [ 32.718432] BUG: Bad rss-counter state mm:0000000035a9f090 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36961' (ECDSA) to the list of known hosts. 2023/06/19 14:02:55 fuzzer started 2023/06/19 14:02:55 dialing manager at localhost:44161 2023/06/19 14:02:55 checking machine... 2023/06/19 14:02:55 checking revisions... [ 33.351614] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:02:55 testing simple program... [ 33.399227] cgroup: Unknown subsys name 'net' [ 33.437884] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:02:54 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016c5b680 RCX=0000000000000000 RDX=1ffff11002d8b906 RSI=ffffffff81862c9b RDI=ffff888016c5c830 RBP=ffff888018eb5318 RSP=ffff88801450fd78 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=7962206d65687420 R12=0000000000001000 R13=ffff88800ee2c400 R14=0000000000008000 R15=0000000000000001 RIP=ffffffff81862ccd 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 00007f6fb66a2900 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=00007f6fb6c57650 CR3=0000000015b5a000 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=2034353a32303a3431203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a32303a3431203931 XMM08=3d656e696c646d632022656369767265 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=0000000000000001 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=00007faca02117b0 CR3=000000000c60e000 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=7bf3a7dd9fe164bc824990631c8eb2fc XMM02=ec2efd57dc4c00df000000000011ce20 XMM03=fcb835f9dce570e7000000000011cef0 XMM04=03eef32cb79c902e00000000000ae988 XMM05=dfcdbad4f1609c3700000000001342d8 XMM06=f1f452e44064bedf0000000000133140 XMM07=e042d86d42eb936e00000000001249f0 XMM08=fcb835f9dce570e7000000000011cef0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000