syzkaller login: [ 31.035837] BUG: Bad rss-counter state mm:00000000e87c4e9a type:MM_FILEPAGES val:33 [ 31.036857] BUG: Bad rss-counter state mm:00000000e87c4e9a type:MM_ANONPAGES val:22 [ 31.201555] ================================================================== [ 31.202476] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.203427] Read of size 8 at addr ffff88800ea19880 by task sshd/220 [ 31.204197] [ 31.204415] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.205392] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.206361] Call Trace: [ 31.206786] [ 31.207125] dump_stack_lvl+0x91/0xf0 [ 31.207698] print_report+0xcc/0x620 [ 31.208260] ? __virt_addr_valid+0x102/0x340 [ 31.208920] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.209644] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.210363] kasan_report+0xbe/0xf0 [ 31.210936] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.211691] vma_interval_tree_remove+0xc75/0xec0 [ 31.212433] vma_prepare+0xc54/0x11a0 [ 31.213060] __split_vma+0x5af/0x950 [ 31.213542] ? __pfx___split_vma+0x10/0x10 [ 31.214072] ? find_held_lock+0x2c/0x110 [ 31.214593] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.215162] ? lock_is_held_type+0x9f/0x120 [ 31.215699] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.216301] ? mtree_range_walk+0x632/0x900 [ 31.216867] ? mas_walk+0x5c7/0x7c0 [ 31.217342] do_vmi_munmap+0x1f1/0x2b0 [ 31.217832] mmap_region+0x1f9/0x2660 [ 31.218315] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.218825] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.219552] ? __pfx_lock_acquire+0x10/0x10 [ 31.220090] ? __pfx_mmap_region+0x10/0x10 [ 31.220626] ? security_mmap_addr+0x7d/0xa0 [ 31.221163] ? get_unmapped_area+0x1f5/0x3f0 [ 31.221710] do_mmap+0x854/0xf00 [ 31.222149] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.222645] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.223204] ksys_mmap_pgoff+0x3af/0x500 [ 31.223707] do_syscall_64+0x3f/0x90 [ 31.224186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.224851] RIP: 0033:0x7fe3b6d83d82 [ 31.225306] 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 [ 31.227438] RSP: 002b:00007ffcaf4b5c38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.228342] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe3b6d83d82 [ 31.229207] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe3b61bd000 [ 31.230049] RBP: 00007fe3b61bd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.230896] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c4ff554ec0 [ 31.231748] R13: 00007ffcaf4b5c50 R14: 00007ffcaf4b5c80 R15: 00007ffcaf4b5fe0 [ 31.232620] [ 31.232911] [ 31.233128] Allocated by task 213: [ 31.233564] kasan_save_stack+0x22/0x50 [ 31.234072] kasan_set_track+0x25/0x30 [ 31.234568] __kasan_slab_alloc+0x59/0x70 [ 31.235098] kmem_cache_alloc+0x16b/0x370 [ 31.235618] vm_area_dup+0x20/0x160 [ 31.236077] __split_vma+0x170/0x950 [ 31.236558] split_vma+0xc6/0x110 [ 31.237002] mprotect_fixup+0x8d2/0xb30 [ 31.237512] do_mprotect_pkey+0x87e/0xd40 [ 31.238032] __x64_sys_mprotect+0x78/0xc0 [ 31.238560] do_syscall_64+0x3f/0x90 [ 31.239034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.239679] [ 31.239893] Freed by task 203: [ 31.240285] kasan_save_stack+0x22/0x50 [ 31.240800] kasan_set_track+0x25/0x30 [ 31.241303] kasan_save_free_info+0x2b/0x50 [ 31.241834] __kasan_slab_free+0x10a/0x190 [ 31.242366] kmem_cache_free+0x10d/0x4d0 [ 31.242876] rcu_core+0x8c8/0x2860 [ 31.243319] __do_softirq+0x1b7/0x7d4 [ 31.243806] [ 31.244021] Last potentially related work creation: [ 31.244611] kasan_save_stack+0x22/0x50 [ 31.245119] __kasan_record_aux_stack+0x8e/0xa0 [ 31.245695] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.246331] remove_vma+0x139/0x170 [ 31.246791] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.247355] do_vmi_munmap+0x1f1/0x2b0 [ 31.247837] __vm_munmap+0x138/0x3a0 [ 31.248317] __x64_sys_munmap+0x59/0x80 [ 31.248832] do_syscall_64+0x3f/0x90 [ 31.249313] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.249954] [ 31.250172] Second to last potentially related work creation: [ 31.250853] kasan_save_stack+0x22/0x50 [ 31.251353] __kasan_record_aux_stack+0x8e/0xa0 [ 31.251925] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.252594] remove_vma+0x139/0x170 [ 31.253046] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.253603] do_vmi_munmap+0x1f1/0x2b0 [ 31.254093] mmap_region+0x1f9/0x2660 [ 31.254572] do_mmap+0x854/0xf00 [ 31.255003] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.255489] ksys_mmap_pgoff+0x3af/0x500 [ 31.255994] do_syscall_64+0x3f/0x90 [ 31.256474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.257132] [ 31.257359] The buggy address belongs to the object at ffff88800ea19828 [ 31.257359] which belongs to the cache vm_area_struct of size 168 [ 31.258851] The buggy address is located 88 bytes inside of [ 31.258851] freed 168-byte region [ffff88800ea19828, ffff88800ea198d0) [ 31.260265] [ 31.260488] The buggy address belongs to the physical page: [ 31.261174] page:00000000a032468e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea19 [ 31.262271] memcg:ffff88800ec1c301 [ 31.262705] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.263346] page_type: 0xffffffff() [ 31.263796] raw: 0100000000000200 ffff8880087a0c80 ffffea0000368140 dead00000000000a [ 31.264721] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec1c301 [ 31.265640] page dumped because: kasan: bad access detected [ 31.266309] [ 31.266525] Memory state around the buggy address: [ 31.267111] ffff88800ea19780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.267981] ffff88800ea19800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.268861] >ffff88800ea19880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.269714] ^ [ 31.270125] ffff88800ea19900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.271003] ffff88800ea19980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.271860] ================================================================== [ 31.272842] Disabling lock debugging due to kernel taint [ 34.139429] BUG: Bad rss-counter state mm:00000000093c7338 type:MM_FILEPAGES val:33 [ 34.140609] BUG: Bad rss-counter state mm:00000000093c7338 type:MM_ANONPAGES val:22 [ 34.633398] BUG: Bad rss-counter state mm:000000003418ec09 type:MM_FILEPAGES val:33 [ 34.634581] BUG: Bad rss-counter state mm:000000003418ec09 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60748' (ECDSA) to the list of known hosts. 2023/06/20 22:23:36 fuzzer started 2023/06/20 22:23:36 dialing manager at localhost:36067 2023/06/20 22:23:36 checking machine... 2023/06/20 22:23:36 checking revisions... [ 35.297640] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:23:37 testing simple program... [ 35.347814] cgroup: Unknown subsys name 'net' [ 35.393874] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:23:36 Registers: info registers vcpu 0 RAX=1ffff110028d0fba RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888014687d01 RSI=ffff888014687da0 RDI=ffff888014687da0 RBP=ffff888014687858 RSP=ffff888014687790 R8 =0000000000000001 R9 =ffff888014687840 R10=0000000000038001 R11=0000000000023906 R12=ffff888014687860 R13=ffff888014687848 R14=ffff888014687da0 R15=ffff888014687800 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 00007f8cd7d58900 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=00007f8cd7168f30 CR3=000000000c604000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d771a1735f4f293700000000000ae988 XMM05=72e3fc765e83e57a0000000000135030 XMM06=19e9129bd510f2350000000000133ee8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=ffff888008c04400 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=00007f62fa034650 CR3=00000000147ba000 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=2036333a33323a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a33323a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000