syzkaller login: [ 31.128800] BUG: Bad rss-counter state mm:000000000992d36f type:MM_FILEPAGES val:33 [ 31.130162] BUG: Bad rss-counter state mm:000000000992d36f type:MM_ANONPAGES val:22 [ 31.202904] ================================================================== [ 31.203869] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.204826] Read of size 8 at addr ffff888019631058 by task sshd/222 [ 31.205613] [ 31.205869] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.206988] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.208022] Call Trace: [ 31.208345] [ 31.208636] dump_stack_lvl+0x91/0xf0 [ 31.209145] print_report+0xcc/0x620 [ 31.209648] ? __virt_addr_valid+0x102/0x340 [ 31.210241] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.210895] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.211519] kasan_report+0xbe/0xf0 [ 31.212035] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.212663] vma_interval_tree_remove+0xc75/0xec0 [ 31.213289] vma_prepare+0xc54/0x11a0 [ 31.213803] __split_vma+0x5af/0x950 [ 31.214283] ? __pfx___split_vma+0x10/0x10 [ 31.214965] ? find_held_lock+0x2c/0x110 [ 31.215678] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.216429] ? lock_is_held_type+0x9f/0x120 [ 31.217152] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.217962] ? mtree_range_walk+0x632/0x900 [ 31.218708] ? mas_walk+0x5c7/0x7c0 [ 31.219340] do_vmi_munmap+0x1f1/0x2b0 [ 31.219953] mmap_region+0x1f9/0x2660 [ 31.220462] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.221082] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.221992] ? __pfx_lock_acquire+0x10/0x10 [ 31.222543] ? __pfx_mmap_region+0x10/0x10 [ 31.223098] ? security_mmap_addr+0x7d/0xa0 [ 31.223650] ? get_unmapped_area+0x1f5/0x3f0 [ 31.224233] do_mmap+0x854/0xf00 [ 31.224690] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.225210] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.225825] ksys_mmap_pgoff+0x3af/0x500 [ 31.226353] do_syscall_64+0x3f/0x90 [ 31.226899] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.227739] RIP: 0033:0x7f1414a08d82 [ 31.228211] 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 [ 31.230393] RSP: 002b:00007ffc0e74e048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.231321] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1414a08d82 [ 31.232211] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1413e42000 [ 31.233079] RBP: 00007f1413e42000 R08: 0000000000000009 R09: 0000000000001000 [ 31.233958] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561967e7ff70 [ 31.234839] R13: 00007ffc0e74e060 R14: 00007ffc0e74e090 R15: 00007ffc0e74e3f0 [ 31.235744] [ 31.236044] [ 31.236267] Allocated by task 215: [ 31.236716] kasan_save_stack+0x22/0x50 [ 31.237247] kasan_set_track+0x25/0x30 [ 31.237787] __kasan_slab_alloc+0x59/0x70 [ 31.238322] kmem_cache_alloc+0x16b/0x370 [ 31.238867] vm_area_dup+0x20/0x160 [ 31.239335] __split_vma+0x170/0x950 [ 31.239847] split_vma+0xc6/0x110 [ 31.240300] mprotect_fixup+0x8d2/0xb30 [ 31.240825] do_mprotect_pkey+0x87e/0xd40 [ 31.241362] __x64_sys_mprotect+0x78/0xc0 [ 31.241923] do_syscall_64+0x3f/0x90 [ 31.242409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.243076] [ 31.243294] Freed by task 13: [ 31.243717] kasan_save_stack+0x22/0x50 [ 31.244236] kasan_set_track+0x25/0x30 [ 31.244759] kasan_save_free_info+0x2b/0x50 [ 31.245301] __kasan_slab_free+0x10a/0x190 [ 31.245876] kmem_cache_free+0x10d/0x4d0 [ 31.246456] rcu_core+0x8c8/0x2860 [ 31.246924] __do_softirq+0x1b7/0x7d4 [ 31.247415] [ 31.247646] Last potentially related work creation: [ 31.248255] kasan_save_stack+0x22/0x50 [ 31.248784] __kasan_record_aux_stack+0x8e/0xa0 [ 31.249375] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.250052] remove_vma+0x139/0x170 [ 31.250508] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.251097] do_vmi_munmap+0x1f1/0x2b0 [ 31.251615] __vm_munmap+0x138/0x3a0 [ 31.252110] __x64_sys_munmap+0x59/0x80 [ 31.252623] do_syscall_64+0x3f/0x90 [ 31.253118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.253792] [ 31.254024] The buggy address belongs to the object at ffff888019631000 [ 31.254024] which belongs to the cache vm_area_struct of size 168 [ 31.255533] The buggy address is located 88 bytes inside of [ 31.255533] freed 168-byte region [ffff888019631000, ffff8880196310a8) [ 31.257000] [ 31.257227] The buggy address belongs to the physical page: [ 31.257919] page:00000000c15f51e3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19631 [ 31.259035] memcg:ffff8880197ee701 [ 31.259472] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.260206] page_type: 0xffffffff() [ 31.260665] raw: 0100000000000200 ffff8880087a0c80 ffffea0000665140 dead000000000007 [ 31.261595] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880197ee701 [ 31.262540] page dumped because: kasan: bad access detected [ 31.263219] [ 31.263443] Memory state around the buggy address: [ 31.264064] ffff888019630f00: fa fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb [ 31.264941] ffff888019630f80: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 31.265828] >ffff888019631000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.266685] ^ [ 31.267433] ffff888019631080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.268320] ffff888019631100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.269192] ================================================================== [ 31.270158] Disabling lock debugging due to kernel taint [ 33.203031] BUG: Bad rss-counter state mm:000000000fea1dd3 type:MM_FILEPAGES val:33 [ 33.204102] BUG: Bad rss-counter state mm:000000000fea1dd3 type:MM_ANONPAGES val:22 [ 33.793851] BUG: Bad rss-counter state mm:0000000008ccaf62 type:MM_FILEPAGES val:33 [ 33.795035] BUG: Bad rss-counter state mm:0000000008ccaf62 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41734' (ECDSA) to the list of known hosts. 2023/06/20 14:03:11 fuzzer started 2023/06/20 14:03:11 dialing manager at localhost:36067 2023/06/20 14:03:11 checking machine... 2023/06/20 14:03:11 checking revisions... [ 34.488668] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:03:11 testing simple program... [ 34.540662] cgroup: Unknown subsys name 'net' [ 34.579865] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:03:11 Registers: info registers vcpu 0 RAX=1ffff11001b82a85 RBX=ffff88800dc153f8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800dc15428 RBP=ffff888016aac450 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=1ffff1100d9c7479 R12=dffffc0000000000 R13=ffff888016aac7e8 R14=ffffffff813782f8 R15=ffff888016aac7e8 RIP=ffffffff818464ec 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 00007f7e5dae1900 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=0000558d85d1f768 CR3=000000000c500000 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=a95d79a7cef037b1fe4422c08514f6ab XMM02=ec2efd57dc4c00df000000000011b180 XMM03=79915ce769c59c2d000000000011b250 XMM04=6a4aedfc2fbb0d4700000000000ae988 XMM05=784a97126fd8cdb90000000000132720 XMM06=00c3ffa147b8d85700000000001317c0 XMM07=fb795ef6d65770560000000000121af0 XMM08=2c67c8bc2e329bc3000000000011b1f0 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=0000000000000001 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=00007fff9a5ee458 CR3=0000000015a42000 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=2030313a33303a3431203032206e754a XMM01=6964206465766965636552203a5d3133 XMM02=6f63736964203a31313a323033313520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a33303a3431203032 XMM08=6d632022656369767265732e40797474 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000