syzkaller login: [ 32.161313] BUG: Bad rss-counter state mm:000000001c6096ed type:MM_FILEPAGES val:33 [ 32.162549] BUG: Bad rss-counter state mm:000000001c6096ed type:MM_ANONPAGES val:22 [ 32.200824] ================================================================== [ 32.201855] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.202810] Read of size 8 at addr ffff888019ec35c8 by task sshd/220 [ 32.203596] [ 32.203816] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.204689] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.205670] Call Trace: [ 32.206010] [ 32.206298] dump_stack_lvl+0x91/0xf0 [ 32.206792] print_report+0xcc/0x620 [ 32.207284] ? __virt_addr_valid+0x102/0x340 [ 32.207845] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.208479] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.209103] kasan_report+0xbe/0xf0 [ 32.209598] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.210228] vma_interval_tree_remove+0xc75/0xec0 [ 32.210849] vma_prepare+0xc54/0x11a0 [ 32.211331] __split_vma+0x5af/0x950 [ 32.211816] ? __pfx___split_vma+0x10/0x10 [ 32.212348] ? find_held_lock+0x2c/0x110 [ 32.212890] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.213466] ? lock_is_held_type+0x9f/0x120 [ 32.214028] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.214641] ? mtree_range_walk+0x632/0x900 [ 32.215205] ? mas_walk+0x5c7/0x7c0 [ 32.215672] do_vmi_munmap+0x1f1/0x2b0 [ 32.216194] mmap_region+0x1f9/0x2660 [ 32.216682] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.217195] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.217944] ? __pfx_lock_acquire+0x10/0x10 [ 32.218494] ? __pfx_mmap_region+0x10/0x10 [ 32.219029] ? security_mmap_addr+0x7d/0xa0 [ 32.219563] ? get_unmapped_area+0x1f5/0x3f0 [ 32.220115] do_mmap+0x854/0xf00 [ 32.220561] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.221060] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.221631] ksys_mmap_pgoff+0x3af/0x500 [ 32.222171] do_syscall_64+0x3f/0x90 [ 32.222650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.223303] RIP: 0033:0x7f6213310d82 [ 32.223765] 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 [ 32.225948] RSP: 002b:00007ffdffad1c68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.226865] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6213310d82 [ 32.227853] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f621274a000 [ 32.228704] RBP: 00007f621274a000 R08: 0000000000000009 R09: 0000000000001000 [ 32.229554] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b6080aab20 [ 32.230431] R13: 00007ffdffad1c80 R14: 00007ffdffad1cb0 R15: 00007ffdffad2010 [ 32.231293] [ 32.231586] [ 32.231803] Allocated by task 213: [ 32.232233] kasan_save_stack+0x22/0x50 [ 32.232738] kasan_set_track+0x25/0x30 [ 32.233241] __kasan_slab_alloc+0x59/0x70 [ 32.233772] kmem_cache_alloc+0x16b/0x370 [ 32.234299] vm_area_dup+0x20/0x160 [ 32.234755] __split_vma+0x170/0x950 [ 32.235227] split_vma+0xc6/0x110 [ 32.235670] mprotect_fixup+0x8d2/0xb30 [ 32.236170] do_mprotect_pkey+0x87e/0xd40 [ 32.236696] __x64_sys_mprotect+0x78/0xc0 [ 32.237236] do_syscall_64+0x3f/0x90 [ 32.237714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.238355] [ 32.238573] Freed by task 213: [ 32.238961] kasan_save_stack+0x22/0x50 [ 32.239462] kasan_set_track+0x25/0x30 [ 32.239958] kasan_save_free_info+0x2b/0x50 [ 32.240487] __kasan_slab_free+0x10a/0x190 [ 32.241015] kmem_cache_free+0x10d/0x4d0 [ 32.241512] rcu_core+0x8c8/0x2860 [ 32.241970] __do_softirq+0x1b7/0x7d4 [ 32.242444] [ 32.242656] Last potentially related work creation: [ 32.243234] kasan_save_stack+0x22/0x50 [ 32.243741] __kasan_record_aux_stack+0x8e/0xa0 [ 32.244323] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.244959] remove_vma+0x139/0x170 [ 32.245408] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.245969] do_vmi_munmap+0x1f1/0x2b0 [ 32.246452] __vm_munmap+0x138/0x3a0 [ 32.246914] __x64_sys_munmap+0x59/0x80 [ 32.247402] do_syscall_64+0x3f/0x90 [ 32.247876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.248511] [ 32.248726] Second to last potentially related work creation: [ 32.249401] kasan_save_stack+0x22/0x50 [ 32.249917] __kasan_record_aux_stack+0x8e/0xa0 [ 32.250483] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.251124] remove_vma+0x139/0x170 [ 32.251573] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.252124] do_vmi_munmap+0x1f1/0x2b0 [ 32.252603] mmap_region+0x1f9/0x2660 [ 32.253083] do_mmap+0x854/0xf00 [ 32.253510] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.254009] ksys_mmap_pgoff+0x3af/0x500 [ 32.254504] do_syscall_64+0x3f/0x90 [ 32.254976] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.255615] [ 32.255831] The buggy address belongs to the object at ffff888019ec3570 [ 32.255831] which belongs to the cache vm_area_struct of size 168 [ 32.257286] The buggy address is located 88 bytes inside of [ 32.257286] freed 168-byte region [ffff888019ec3570, ffff888019ec3618) [ 32.258700] [ 32.258912] The buggy address belongs to the physical page: [ 32.259571] page:000000003fba4c60 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ec3 [ 32.260648] memcg:ffff888019e01a01 [ 32.261073] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.261768] page_type: 0xffffffff() [ 32.262221] raw: 0100000000000200 ffff88800879fc80 ffffea00003864c0 dead000000000003 [ 32.263127] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e01a01 [ 32.264019] page dumped because: kasan: bad access detected [ 32.264673] [ 32.264887] Memory state around the buggy address: [ 32.265457] ffff888019ec3480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.266322] ffff888019ec3500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 32.267174] >ffff888019ec3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.268019] ^ [ 32.268680] ffff888019ec3600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.269534] ffff888019ec3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.270384] ================================================================== [ 32.271655] Disabling lock debugging due to kernel taint [ 34.353821] BUG: Bad rss-counter state mm:000000005910b679 type:MM_FILEPAGES val:33 [ 34.355034] BUG: Bad rss-counter state mm:000000005910b679 type:MM_ANONPAGES val:22 [ 34.732552] BUG: Bad rss-counter state mm:000000008cc8f481 type:MM_FILEPAGES val:33 [ 34.733614] BUG: Bad rss-counter state mm:000000008cc8f481 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27396' (ECDSA) to the list of known hosts. 2023/06/20 07:15:14 fuzzer started 2023/06/20 07:15:15 dialing manager at localhost:44161 2023/06/20 07:15:15 checking machine... 2023/06/20 07:15:15 checking revisions... [ 35.428296] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:15:15 testing simple program... [ 35.493028] cgroup: Unknown subsys name 'net' [ 35.534100] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:15:13 Registers: info registers vcpu 0 RAX=ffff8880142e0001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880142dfd01 RSI=ffff8880142dfda8 RDI=ffff8880142df998 RBP=ffff8880142df9e0 RSP=ffff8880142df900 R8 =ffffffff86146344 R9 =ffff8880142df9c8 R10=0000000000038001 R11=0000000000023535 R12=ffff8880142df9e8 R13=ffff8880142d8000 R14=ffff8880142dfdb0 R15=ffff8880142df988 RIP=ffffffff811304d1 RFL=00000286 [--S--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 00007f091d628900 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=00007f091ca8f300 CR3=000000000c598000 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=6fbe8e8f0eb1c26500000000000ae988 XMM05=258e30ca86accde60000000000136af0 XMM06=4fda316b135da52b0000000000135b90 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff888018dd0c98 RCX=0000000000000000 RDX=1ffff110033cff6a RSI=ffffffff81b459ab RDI=0000000000000005 RBP=ffffea00006cb500 RSP=ffff888019e7f9e0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=ffff888018dd0ec0 R14=0000000000000b79 R15=0000000000000000 RIP=ffffffff814c07eb 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 00007f5771145700 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=00007f25d1acf0b0 CR3=000000000e38a000 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=2034313a35313a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a35313a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000