syzkaller login: [ 33.468399] BUG: Bad rss-counter state mm:00000000c211f3f0 type:MM_FILEPAGES val:33 [ 33.469588] BUG: Bad rss-counter state mm:00000000c211f3f0 type:MM_ANONPAGES val:22 [ 33.615881] ================================================================== [ 33.616821] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.617894] Read of size 8 at addr ffff88801430b798 by task sshd/220 [ 33.618691] [ 33.618947] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.619848] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.620978] Call Trace: [ 33.621307] [ 33.621593] dump_stack_lvl+0x91/0xf0 [ 33.622148] print_report+0xcc/0x620 [ 33.622644] ? __virt_addr_valid+0x102/0x340 [ 33.623218] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.623857] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.624483] kasan_report+0xbe/0xf0 [ 33.624979] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.625610] vma_interval_tree_remove+0xc75/0xec0 [ 33.626236] vma_prepare+0xc54/0x11a0 [ 33.626722] __split_vma+0x5af/0x950 [ 33.627224] ? __pfx___split_vma+0x10/0x10 [ 33.627756] ? find_held_lock+0x2c/0x110 [ 33.628295] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.628884] ? lock_is_held_type+0x9f/0x120 [ 33.629433] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.630067] ? mtree_range_walk+0x632/0x900 [ 33.630627] ? mas_walk+0x5c7/0x7c0 [ 33.631132] do_vmi_munmap+0x1f1/0x2b0 [ 33.631632] mmap_region+0x1f9/0x2660 [ 33.632134] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.632651] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.633382] ? __pfx_lock_acquire+0x10/0x10 [ 33.633929] ? __pfx_mmap_region+0x10/0x10 [ 33.634479] ? security_mmap_addr+0x7d/0xa0 [ 33.635034] ? get_unmapped_area+0x1f5/0x3f0 [ 33.635594] do_mmap+0x854/0xf00 [ 33.636064] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.636562] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.637144] ksys_mmap_pgoff+0x3af/0x500 [ 33.637660] do_syscall_64+0x3f/0x90 [ 33.638163] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.638847] RIP: 0033:0x7f235320ad82 [ 33.639302] 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 [ 33.641475] RSP: 002b:00007ffd08dc8d98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.642423] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f235320ad82 [ 33.643290] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2352644000 [ 33.644167] RBP: 00007f2352644000 R08: 0000000000000009 R09: 0000000000001000 [ 33.645057] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ea4f5d8ec0 [ 33.645921] R13: 00007ffd08dc8db0 R14: 00007ffd08dc8de0 R15: 00007ffd08dc9140 [ 33.646794] [ 33.647088] [ 33.647304] Allocated by task 213: [ 33.647735] kasan_save_stack+0x22/0x50 [ 33.648256] kasan_set_track+0x25/0x30 [ 33.648760] __kasan_slab_alloc+0x59/0x70 [ 33.649312] kmem_cache_alloc+0x16b/0x370 [ 33.649848] vm_area_dup+0x20/0x160 [ 33.650333] __split_vma+0x170/0x950 [ 33.650817] split_vma+0xc6/0x110 [ 33.651261] mprotect_fixup+0x8d2/0xb30 [ 33.651773] do_mprotect_pkey+0x87e/0xd40 [ 33.652295] __x64_sys_mprotect+0x78/0xc0 [ 33.652847] do_syscall_64+0x3f/0x90 [ 33.653323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.653989] [ 33.654214] Freed by task 213: [ 33.654610] kasan_save_stack+0x22/0x50 [ 33.655127] kasan_set_track+0x25/0x30 [ 33.655633] kasan_save_free_info+0x2b/0x50 [ 33.656179] __kasan_slab_free+0x10a/0x190 [ 33.656716] kmem_cache_free+0x10d/0x4d0 [ 33.657230] rcu_core+0x8c8/0x2860 [ 33.657677] __do_softirq+0x1b7/0x7d4 [ 33.658181] [ 33.658425] Last potentially related work creation: [ 33.659191] kasan_save_stack+0x22/0x50 [ 33.659855] __kasan_record_aux_stack+0x8e/0xa0 [ 33.660623] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.661475] remove_vma+0x139/0x170 [ 33.662010] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.662606] do_vmi_munmap+0x1f1/0x2b0 [ 33.663120] __vm_munmap+0x138/0x3a0 [ 33.663601] __x64_sys_munmap+0x59/0x80 [ 33.664121] do_syscall_64+0x3f/0x90 [ 33.664608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.665274] [ 33.665496] The buggy address belongs to the object at ffff88801430b740 [ 33.665496] which belongs to the cache vm_area_struct of size 168 [ 33.667017] The buggy address is located 88 bytes inside of [ 33.667017] freed 168-byte region [ffff88801430b740, ffff88801430b7e8) [ 33.668436] [ 33.668650] The buggy address belongs to the physical page: [ 33.669342] page:000000007cfe5165 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1430b [ 33.670464] memcg:ffff88800fb7b001 [ 33.670912] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.671568] page_type: 0xffffffff() [ 33.672027] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.672967] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb7b001 [ 33.673889] page dumped because: kasan: bad access detected [ 33.674581] [ 33.674809] Memory state around the buggy address: [ 33.675390] ffff88801430b680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.676252] ffff88801430b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.677126] >ffff88801430b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.678001] ^ [ 33.678507] ffff88801430b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.679370] ffff88801430b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.680250] ================================================================== [ 33.681291] Disabling lock debugging due to kernel taint [ 35.601639] BUG: Bad rss-counter state mm:00000000bf63b400 type:MM_FILEPAGES val:33 [ 35.602808] BUG: Bad rss-counter state mm:00000000bf63b400 type:MM_ANONPAGES val:22 [ 36.152573] BUG: Bad rss-counter state mm:0000000099882ad9 type:MM_FILEPAGES val:33 [ 36.153768] BUG: Bad rss-counter state mm:0000000099882ad9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46767' (ECDSA) to the list of known hosts. 2023/06/20 07:12:30 fuzzer started 2023/06/20 07:12:31 dialing manager at localhost:44161 2023/06/20 07:12:31 checking machine... 2023/06/20 07:12:31 checking revisions... [ 36.781510] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:12:31 testing simple program... [ 36.829082] cgroup: Unknown subsys name 'net' [ 36.880897] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:12:28 Registers: info registers vcpu 0 RAX=0000000000000011 RBX=0000000000000002 RCX=ffffffff8180c584 RDX=0000000000000011 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffff88806ce09af0 RSP=ffff88806ce099f0 R8 =ffffffff86137508 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffffffff85dfca3c R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8112fc21 RFL=00000206 [-----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 00007fb82b075900 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=00007fb82b62a650 CR3=000000000e95a000 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=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86137501 RDX=1ffff110011caf36 RSI=ffffffff8180f43b RDI=ffff888008e57958 RBP=ffff888008e579b0 RSP=ffff888008e578e8 R8 =ffffffff86137542 R9 =ffff888008e57998 R10=0000000000038001 R11=0000000000020d8a R12=ffff888008e57a20 R13=0000000000000000 R14=ffff888008e2d1c0 R15=ffff888008e57958 RIP=ffffffff8113062c 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 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=00007f4bef989b80 CR3=000000000c748000 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=2030333a32313a3730203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a32313a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000