syzkaller login: [ 46.038536] BUG: Bad rss-counter state mm:00000000f8d90b2c type:MM_FILEPAGES val:33 [ 46.040137] BUG: Bad rss-counter state mm:00000000f8d90b2c type:MM_ANONPAGES val:22 [ 46.210800] ================================================================== [ 46.211721] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.212689] Read of size 8 at addr ffff88801ac1f5c8 by task sshd/219 [ 46.213498] [ 46.213815] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.214689] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.215681] Call Trace: [ 46.216047] [ 46.216349] dump_stack_lvl+0x91/0xf0 [ 46.216853] print_report+0xcc/0x620 [ 46.217345] ? __virt_addr_valid+0x102/0x340 [ 46.217891] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.218509] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.219130] kasan_report+0xbe/0xf0 [ 46.219613] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.220259] vma_interval_tree_remove+0xc75/0xec0 [ 46.220869] vma_prepare+0xc54/0x11a0 [ 46.221350] __split_vma+0x5af/0x950 [ 46.221831] ? __pfx___split_vma+0x10/0x10 [ 46.222367] ? find_held_lock+0x2c/0x110 [ 46.222885] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.223453] ? lock_is_held_type+0x9f/0x120 [ 46.223990] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.224616] ? mtree_range_walk+0x632/0x900 [ 46.225168] ? mas_walk+0x5c7/0x7c0 [ 46.225640] do_vmi_munmap+0x1f1/0x2b0 [ 46.226134] mmap_region+0x1f9/0x2660 [ 46.226617] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.227128] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.227850] ? __pfx_lock_acquire+0x10/0x10 [ 46.228402] ? __pfx_mmap_region+0x10/0x10 [ 46.228928] ? security_mmap_addr+0x7d/0xa0 [ 46.229460] ? get_unmapped_area+0x1f5/0x3f0 [ 46.230008] do_mmap+0x854/0xf00 [ 46.230455] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.230947] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.231513] ksys_mmap_pgoff+0x3af/0x500 [ 46.232017] do_syscall_64+0x3f/0x90 [ 46.232517] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.233159] RIP: 0033:0x7f6646c13d82 [ 46.233615] 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 [ 46.235722] RSP: 002b:00007ffca16af4a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.236633] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6646c13d82 [ 46.237485] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f664604d000 [ 46.238334] RBP: 00007f664604d000 R08: 0000000000000009 R09: 0000000000001000 [ 46.239188] R10: 0000000000000812 R11: 0000000000000206 R12: 000056207646eec0 [ 46.240032] R13: 00007ffca16af4c0 R14: 00007ffca16af4f0 R15: 00007ffca16af850 [ 46.240902] [ 46.241203] [ 46.241417] Allocated by task 212: [ 46.241845] kasan_save_stack+0x22/0x50 [ 46.242353] kasan_set_track+0x25/0x30 [ 46.242857] __kasan_slab_alloc+0x59/0x70 [ 46.243383] kmem_cache_alloc+0x16b/0x370 [ 46.243909] vm_area_dup+0x20/0x160 [ 46.244382] __split_vma+0x170/0x950 [ 46.244854] split_vma+0xc6/0x110 [ 46.245302] mprotect_fixup+0x8d2/0xb30 [ 46.245803] do_mprotect_pkey+0x87e/0xd40 [ 46.246325] __x64_sys_mprotect+0x78/0xc0 [ 46.246847] do_syscall_64+0x3f/0x90 [ 46.247325] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.247971] [ 46.248202] Freed by task 212: [ 46.248594] kasan_save_stack+0x22/0x50 [ 46.249104] kasan_set_track+0x25/0x30 [ 46.249597] kasan_save_free_info+0x2b/0x50 [ 46.250131] __kasan_slab_free+0x10a/0x190 [ 46.250663] kmem_cache_free+0x10d/0x4d0 [ 46.251181] rcu_core+0x8c8/0x2860 [ 46.251626] __do_softirq+0x1b7/0x7d4 [ 46.252108] [ 46.252327] Last potentially related work creation: [ 46.252907] kasan_save_stack+0x22/0x50 [ 46.253414] __kasan_record_aux_stack+0x8e/0xa0 [ 46.253984] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.254626] remove_vma+0x139/0x170 [ 46.255079] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.255633] do_vmi_munmap+0x1f1/0x2b0 [ 46.256144] __vm_munmap+0x138/0x3a0 [ 46.256609] __x64_sys_munmap+0x59/0x80 [ 46.257104] do_syscall_64+0x3f/0x90 [ 46.257579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.258218] [ 46.258434] The buggy address belongs to the object at ffff88801ac1f570 [ 46.258434] which belongs to the cache vm_area_struct of size 168 [ 46.259897] The buggy address is located 88 bytes inside of [ 46.259897] freed 168-byte region [ffff88801ac1f570, ffff88801ac1f618) [ 46.261303] [ 46.261521] The buggy address belongs to the physical page: [ 46.262181] page:000000002027a7c4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ac1f [ 46.263269] memcg:ffff888018db0501 [ 46.263692] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.264360] page_type: 0xffffffff() [ 46.264809] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 46.265732] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018db0501 [ 46.266630] page dumped because: kasan: bad access detected [ 46.267290] [ 46.267507] Memory state around the buggy address: [ 46.268092] ffff88801ac1f480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.268946] ffff88801ac1f500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 46.269816] >ffff88801ac1f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.270681] ^ [ 46.271350] ffff88801ac1f600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 46.272219] ffff88801ac1f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.273081] ================================================================== [ 46.274066] Disabling lock debugging due to kernel taint [ 48.145040] BUG: Bad rss-counter state mm:0000000078999146 type:MM_FILEPAGES val:33 [ 48.146036] BUG: Bad rss-counter state mm:0000000078999146 type:MM_ANONPAGES val:22 [ 48.642430] BUG: Bad rss-counter state mm:00000000429ab2db type:MM_FILEPAGES val:33 [ 48.643607] BUG: Bad rss-counter state mm:00000000429ab2db type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60784' (ECDSA) to the list of known hosts. 2023/06/19 20:23:01 fuzzer started 2023/06/19 20:23:02 dialing manager at localhost:44161 2023/06/19 20:23:02 checking machine... 2023/06/19 20:23:02 checking revisions... [ 49.371039] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:23:02 testing simple program... [ 49.426538] cgroup: Unknown subsys name 'net' [ 49.465889] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:22:54 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000001 RCX=ffffffff811431b8 RDX=ffff888015b73680 RSI=0000000000000000 RDI=0000000000000006 RBP=000000000eb837a0 RSP=ffff8880196179d8 R8 =0000000000000006 R9 =0000000000000001 R10=0000000000080000 R11=0000000000000000 R12=0000000000000000 R13=0000000000080000 R14=ffffffff83677d48 R15=0000000000000024 RIP=ffffffff814c07eb RFL=00000283 [--S---C] 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 00007fcd12c63900 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=00007fff24878000 CR3=0000000009750000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=ffff88806cf09b38 RDX=1ffff1100d9e135e RSI=ffff88806cf09b30 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a80 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff888018c29540 RIP=ffffffff8113038e 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=00007ff2b9cac5b0 CR3=000000000dc4e000 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=2031303a33323a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a33323a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000