syzkaller login: [ 52.922651] BUG: Bad rss-counter state mm:00000000fbf58701 type:MM_FILEPAGES val:33 [ 52.923896] BUG: Bad rss-counter state mm:00000000fbf58701 type:MM_ANONPAGES val:22 [ 53.088281] ================================================================== [ 53.089391] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 53.090502] Read of size 8 at addr ffff888009d89228 by task sshd/219 [ 53.091674] [ 53.091964] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 53.093084] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 53.094234] Call Trace: [ 53.094616] [ 53.094949] dump_stack_lvl+0x91/0xf0 [ 53.095509] print_report+0xcc/0x620 [ 53.096077] ? __virt_addr_valid+0x102/0x340 [ 53.096720] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.097428] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.098170] kasan_report+0xbe/0xf0 [ 53.098738] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.099476] vma_interval_tree_remove+0xc75/0xec0 [ 53.100189] vma_prepare+0xc54/0x11a0 [ 53.100775] __split_vma+0x5af/0x950 [ 53.101336] ? __pfx___split_vma+0x10/0x10 [ 53.101976] ? find_held_lock+0x2c/0x110 [ 53.102604] do_vmi_align_munmap+0x2ba/0x11f0 [ 53.103278] ? lock_is_held_type+0x9f/0x120 [ 53.103926] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 53.104673] ? mtree_range_walk+0x632/0x900 [ 53.105331] ? mas_walk+0x5c7/0x7c0 [ 53.105892] do_vmi_munmap+0x1f1/0x2b0 [ 53.106481] mmap_region+0x1f9/0x2660 [ 53.107061] ? vm_mmap_pgoff+0x15c/0x3a0 [ 53.107669] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 53.108545] ? __pfx_lock_acquire+0x10/0x10 [ 53.109191] ? __pfx_mmap_region+0x10/0x10 [ 53.109840] ? security_mmap_addr+0x7d/0xa0 [ 53.110494] ? get_unmapped_area+0x1f5/0x3f0 [ 53.111161] do_mmap+0x854/0xf00 [ 53.111691] vm_mmap_pgoff+0x1a6/0x3a0 [ 53.112314] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 53.112997] ksys_mmap_pgoff+0x3af/0x500 [ 53.113609] do_syscall_64+0x3f/0x90 [ 53.114181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.114955] RIP: 0033:0x7ff0ca3b5d82 [ 53.115522] 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 [ 53.118137] RSP: 002b:00007ffd7fab6428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 53.119231] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff0ca3b5d82 [ 53.120268] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff0c97ef000 [ 53.121313] RBP: 00007ff0c97ef000 R08: 0000000000000009 R09: 0000000000001000 [ 53.122351] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555cf982aec0 [ 53.123407] R13: 00007ffd7fab6440 R14: 00007ffd7fab6470 R15: 00007ffd7fab67d0 [ 53.124425] [ 53.124764] [ 53.125025] Allocated by task 212: [ 53.125525] kasan_save_stack+0x22/0x50 [ 53.126114] kasan_set_track+0x25/0x30 [ 53.126677] __kasan_slab_alloc+0x59/0x70 [ 53.127272] kmem_cache_alloc+0x16b/0x370 [ 53.127892] vm_area_dup+0x20/0x160 [ 53.128451] __split_vma+0x170/0x950 [ 53.128990] split_vma+0xc6/0x110 [ 53.129499] mprotect_fixup+0x8d2/0xb30 [ 53.130074] do_mprotect_pkey+0x87e/0xd40 [ 53.130693] __x64_sys_mprotect+0x78/0xc0 [ 53.131311] do_syscall_64+0x3f/0x90 [ 53.131870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.132749] [ 53.133008] Freed by task 212: [ 53.133487] kasan_save_stack+0x22/0x50 [ 53.134102] kasan_set_track+0x25/0x30 [ 53.134700] kasan_save_free_info+0x2b/0x50 [ 53.135345] __kasan_slab_free+0x10a/0x190 [ 53.135979] kmem_cache_free+0x10d/0x4d0 [ 53.136609] rcu_core+0x8c8/0x2860 [ 53.137148] __do_softirq+0x1b7/0x7d4 [ 53.137725] [ 53.137990] Last potentially related work creation: [ 53.138701] kasan_save_stack+0x22/0x50 [ 53.139316] __kasan_record_aux_stack+0x8e/0xa0 [ 53.140020] __call_rcu_common.constprop.0+0x6a/0xb90 [ 53.140799] remove_vma+0x139/0x170 [ 53.141350] do_vmi_align_munmap+0xd4a/0x11f0 [ 53.142033] do_vmi_munmap+0x1f1/0x2b0 [ 53.142613] __vm_munmap+0x138/0x3a0 [ 53.143176] __x64_sys_munmap+0x59/0x80 [ 53.143769] do_syscall_64+0x3f/0x90 [ 53.144361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.145142] [ 53.145402] Second to last potentially related work creation: [ 53.146242] kasan_save_stack+0x22/0x50 [ 53.146841] __kasan_record_aux_stack+0x8e/0xa0 [ 53.147535] __call_rcu_common.constprop.0+0x6a/0xb90 [ 53.148326] remove_vma+0x139/0x170 [ 53.148876] do_vmi_align_munmap+0xd4a/0x11f0 [ 53.149546] do_vmi_munmap+0x1f1/0x2b0 [ 53.150139] mmap_region+0x1f9/0x2660 [ 53.150712] do_mmap+0x854/0xf00 [ 53.151225] vm_mmap_pgoff+0x1a6/0x3a0 [ 53.151819] ksys_mmap_pgoff+0x3af/0x500 [ 53.152445] do_syscall_64+0x3f/0x90 [ 53.153024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.153804] [ 53.154068] The buggy address belongs to the object at ffff888009d891d0 [ 53.154068] which belongs to the cache vm_area_struct of size 168 [ 53.155858] The buggy address is located 88 bytes inside of [ 53.155858] freed 168-byte region [ffff888009d891d0, ffff888009d89278) [ 53.157624] [ 53.157895] The buggy address belongs to the physical page: [ 53.158713] page:0000000006aeeea8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9d89 [ 53.160042] memcg:ffff88800ee1c001 [ 53.160586] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 53.161459] page_type: 0xffffffff() [ 53.162021] raw: 0100000000000200 ffff88800879fc80 ffffea0000276340 0000000000000009 [ 53.163152] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee1c001 [ 53.164273] page dumped because: kasan: bad access detected [ 53.165096] [ 53.165360] Memory state around the buggy address: [ 53.166090] ffff888009d89100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 53.167151] ffff888009d89180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 53.168208] >ffff888009d89200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 53.169296] ^ [ 53.169995] ffff888009d89280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 53.171064] ffff888009d89300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 53.172106] ================================================================== [ 53.173262] Disabling lock debugging due to kernel taint [ 55.621565] BUG: Bad rss-counter state mm:000000008e193c3c type:MM_FILEPAGES val:32 [ 55.622322] BUG: Bad rss-counter state mm:000000008e193c3c type:MM_ANONPAGES val:22 [ 56.061236] BUG: Bad rss-counter state mm:000000001a0cb30a type:MM_FILEPAGES val:33 [ 56.062299] BUG: Bad rss-counter state mm:000000001a0cb30a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30491' (ECDSA) to the list of known hosts. 2023/06/20 06:49:37 fuzzer started 2023/06/20 06:49:38 dialing manager at localhost:44161 2023/06/20 06:49:38 checking machine... 2023/06/20 06:49:38 checking revisions... [ 56.794862] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:49:38 testing simple program... [ 56.843659] cgroup: Unknown subsys name 'net' [ 56.939427] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:49:23 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11000d33e64 RSI=ffff88800699fc80 RDI=ffff88800699f328 RBP=0000000000000000 RSP=ffff88800699f268 R8 =0000000000000001 R9 =ffff88800699f318 R10=0000000000038001 R11=000000000008a85c R12=ffff88800699f338 R13=ffff88800699f320 R14=ffff88800699fc80 R15=ffff88800699f2d8 RIP=ffffffff81131c60 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 00007f09539fb900 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=00007ffc22fb4000 CR3=000000000e050000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007fd0ec4068d0 CR3=000000000c912000 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=2037333a39343a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a39343a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000