syzkaller login: [ 29.978985] BUG: Bad rss-counter state mm:00000000a2126ffb type:MM_FILEPAGES val:33 [ 29.981270] BUG: Bad rss-counter state mm:00000000a2126ffb type:MM_ANONPAGES val:22 [ 30.146879] ================================================================== [ 30.147791] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.148750] Read of size 8 at addr ffff888018215df0 by task sshd/221 [ 30.149556] [ 30.149856] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.150753] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.151737] Call Trace: [ 30.152087] [ 30.152377] dump_stack_lvl+0x91/0xf0 [ 30.152883] print_report+0xcc/0x620 [ 30.153378] ? __virt_addr_valid+0x102/0x340 [ 30.153942] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.154577] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.155204] kasan_report+0xbe/0xf0 [ 30.155683] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.156314] vma_interval_tree_remove+0xc75/0xec0 [ 30.156932] vma_prepare+0xc54/0x11a0 [ 30.157423] __split_vma+0x5af/0x950 [ 30.157891] ? __pfx___split_vma+0x10/0x10 [ 30.158416] ? find_held_lock+0x2c/0x110 [ 30.158933] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.159524] ? lock_is_held_type+0x9f/0x120 [ 30.160080] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.160699] ? mtree_range_walk+0x632/0x900 [ 30.161272] ? mas_walk+0x5c7/0x7c0 [ 30.161770] do_vmi_munmap+0x1f1/0x2b0 [ 30.162276] mmap_region+0x1f9/0x2660 [ 30.162772] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.163286] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.164010] ? __pfx_lock_acquire+0x10/0x10 [ 30.164563] ? __pfx_mmap_region+0x10/0x10 [ 30.165132] ? security_mmap_addr+0x7d/0xa0 [ 30.165695] ? get_unmapped_area+0x1f5/0x3f0 [ 30.166271] do_mmap+0x854/0xf00 [ 30.166725] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.167246] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.167845] ksys_mmap_pgoff+0x3af/0x500 [ 30.168390] do_syscall_64+0x3f/0x90 [ 30.168903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.169592] RIP: 0033:0x7fc964e37d82 [ 30.170082] 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 [ 30.172359] RSP: 002b:00007ffe0cde7298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.173338] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc964e37d82 [ 30.174244] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc964271000 [ 30.175150] RBP: 00007fc964271000 R08: 0000000000000009 R09: 0000000000001000 [ 30.176049] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a3d4afec0 [ 30.176957] R13: 00007ffe0cde72b0 R14: 00007ffe0cde72e0 R15: 00007ffe0cde7640 [ 30.177879] [ 30.178193] [ 30.178421] Allocated by task 214: [ 30.178877] kasan_save_stack+0x22/0x50 [ 30.179407] kasan_set_track+0x25/0x30 [ 30.179919] __kasan_slab_alloc+0x59/0x70 [ 30.180474] kmem_cache_alloc+0x16b/0x370 [ 30.181022] vm_area_dup+0x20/0x160 [ 30.181505] __split_vma+0x170/0x950 [ 30.181991] split_vma+0xc6/0x110 [ 30.182448] mprotect_fixup+0x8d2/0xb30 [ 30.182979] do_mprotect_pkey+0x87e/0xd40 [ 30.183519] __x64_sys_mprotect+0x78/0xc0 [ 30.184066] do_syscall_64+0x3f/0x90 [ 30.184571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.185278] [ 30.185504] Freed by task 214: [ 30.185922] kasan_save_stack+0x22/0x50 [ 30.186444] kasan_set_track+0x25/0x30 [ 30.186959] kasan_save_free_info+0x2b/0x50 [ 30.187518] __kasan_slab_free+0x10a/0x190 [ 30.188081] kmem_cache_free+0x10d/0x4d0 [ 30.188610] rcu_core+0x8c8/0x2860 [ 30.189099] __do_softirq+0x1b7/0x7d4 [ 30.189600] [ 30.189825] Last potentially related work creation: [ 30.190441] kasan_save_stack+0x22/0x50 [ 30.190970] __kasan_record_aux_stack+0x8e/0xa0 [ 30.191572] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.192248] remove_vma+0x139/0x170 [ 30.192719] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.193321] do_vmi_munmap+0x1f1/0x2b0 [ 30.193829] __vm_munmap+0x138/0x3a0 [ 30.194321] __x64_sys_munmap+0x59/0x80 [ 30.194839] do_syscall_64+0x3f/0x90 [ 30.195340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.196016] [ 30.196248] The buggy address belongs to the object at ffff888018215d98 [ 30.196248] which belongs to the cache vm_area_struct of size 168 [ 30.197792] The buggy address is located 88 bytes inside of [ 30.197792] freed 168-byte region [ffff888018215d98, ffff888018215e40) [ 30.199282] [ 30.199507] The buggy address belongs to the physical page: [ 30.200205] page:0000000036dfa8b8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18215 [ 30.201378] memcg:ffff8880145b8501 [ 30.201825] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.202510] page_type: 0xffffffff() [ 30.202987] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.203962] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880145b8501 [ 30.204938] page dumped because: kasan: bad access detected [ 30.205640] [ 30.205865] Memory state around the buggy address: [ 30.206478] ffff888018215c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.207388] ffff888018215d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.208292] >ffff888018215d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.209199] ^ [ 30.210052] ffff888018215e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.210961] ffff888018215e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.211863] ================================================================== [ 30.212902] Disabling lock debugging due to kernel taint [ 32.568645] BUG: Bad rss-counter state mm:000000006b73bcb5 type:MM_FILEPAGES val:33 [ 32.569844] BUG: Bad rss-counter state mm:000000006b73bcb5 type:MM_ANONPAGES val:22 [ 33.057844] BUG: Bad rss-counter state mm:000000009da0f335 type:MM_FILEPAGES val:33 [ 33.059264] BUG: Bad rss-counter state mm:000000009da0f335 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59272' (ECDSA) to the list of known hosts. 2023/06/20 21:33:45 fuzzer started 2023/06/20 21:33:45 dialing manager at localhost:36067 2023/06/20 21:33:45 checking machine... 2023/06/20 21:33:45 checking revisions... [ 33.725237] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:33:45 testing simple program... [ 33.780302] cgroup: Unknown subsys name 'net' [ 33.823001] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:33:45 Registers: info registers vcpu 0 RAX=fffffffffffffffe RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888019a97d01 RSI=ffff888019a97d88 RDI=ffff888019a97d88 RBP=ffff888019a97860 RSP=ffff888019a97798 R8 =0000000000000001 R9 =ffff888019a97848 R10=0000000000038001 R11=000000000008b06b R12=ffff888019a97868 R13=ffff888019a97850 R14=ffff888019a97d88 R15=ffff888019a97808 RIP=ffffffff81131236 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 00007f2ff1a03900 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=00007f2ff1fb8650 CR3=000000000e3a8000 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=219c01ab00008000 RBX=ffff88806cf28100 RCX=ffffffff812888a0 RDX=dffffc0000000000 RSI=0000000000000008 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff888008e07e40 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff810a4860 RFL=00000047 [---Z-PC] 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=00007f32f8270740 CR3=00000000145d2000 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=2035343a33333a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a33333a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000