syzkaller login: [ 45.030327] BUG: Bad rss-counter state mm:00000000bf350c9c type:MM_FILEPAGES val:33 [ 45.031493] BUG: Bad rss-counter state mm:00000000bf350c9c type:MM_ANONPAGES val:22 [ 45.199842] ================================================================== [ 45.200802] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.201795] Read of size 8 at addr ffff88800c9914e0 by task sshd/219 [ 45.202600] [ 45.202882] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.203740] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.204705] Call Trace: [ 45.205023] [ 45.205293] dump_stack_lvl+0x91/0xf0 [ 45.205754] print_report+0xcc/0x620 [ 45.206210] ? __virt_addr_valid+0x102/0x340 [ 45.206725] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.207309] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.207886] kasan_report+0xbe/0xf0 [ 45.208333] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.208941] vma_interval_tree_remove+0xc75/0xec0 [ 45.209519] vma_prepare+0xc54/0x11a0 [ 45.209992] __split_vma+0x5af/0x950 [ 45.210458] ? __pfx___split_vma+0x10/0x10 [ 45.210985] ? find_held_lock+0x2c/0x110 [ 45.211488] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.212047] ? lock_is_held_type+0x9f/0x120 [ 45.212576] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.213170] ? mtree_range_walk+0x632/0x900 [ 45.213704] ? mas_walk+0x5c7/0x7c0 [ 45.214172] do_vmi_munmap+0x1f1/0x2b0 [ 45.214654] mmap_region+0x1f9/0x2660 [ 45.215124] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.215620] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.216322] ? __pfx_lock_acquire+0x10/0x10 [ 45.216858] ? __pfx_mmap_region+0x10/0x10 [ 45.217375] ? security_mmap_addr+0x7d/0xa0 [ 45.217890] ? get_unmapped_area+0x1f5/0x3f0 [ 45.218431] do_mmap+0x854/0xf00 [ 45.218862] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.219346] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.219901] ksys_mmap_pgoff+0x3af/0x500 [ 45.220410] do_syscall_64+0x3f/0x90 [ 45.220877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.221505] RIP: 0033:0x7f3579bd7d82 [ 45.221958] 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 [ 45.224001] RSP: 002b:00007ffcf69a75b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.224897] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3579bd7d82 [ 45.225712] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3579011000 [ 45.226534] RBP: 00007f3579011000 R08: 0000000000000009 R09: 0000000000001000 [ 45.227354] R10: 0000000000000812 R11: 0000000000000206 R12: 000056291e283ec0 [ 45.228183] R13: 00007ffcf69a75d0 R14: 00007ffcf69a7600 R15: 00007ffcf69a7960 [ 45.229032] [ 45.229316] [ 45.229527] Allocated by task 212: [ 45.229950] kasan_save_stack+0x22/0x50 [ 45.230432] kasan_set_track+0x25/0x30 [ 45.230914] __kasan_slab_alloc+0x59/0x70 [ 45.231412] kmem_cache_alloc+0x16b/0x370 [ 45.231917] vm_area_dup+0x20/0x160 [ 45.232358] __split_vma+0x170/0x950 [ 45.232853] split_vma+0xc6/0x110 [ 45.233280] mprotect_fixup+0x8d2/0xb30 [ 45.233775] do_mprotect_pkey+0x87e/0xd40 [ 45.234280] __x64_sys_mprotect+0x78/0xc0 [ 45.234791] do_syscall_64+0x3f/0x90 [ 45.235263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.235897] [ 45.236109] Freed by task 203: [ 45.236505] kasan_save_stack+0x22/0x50 [ 45.237003] kasan_set_track+0x25/0x30 [ 45.237479] kasan_save_free_info+0x2b/0x50 [ 45.237999] __kasan_slab_free+0x10a/0x190 [ 45.238515] kmem_cache_free+0x10d/0x4d0 [ 45.239014] rcu_core+0x8c8/0x2860 [ 45.239446] __do_softirq+0x1b7/0x7d4 [ 45.239913] [ 45.240125] Last potentially related work creation: [ 45.240705] kasan_save_stack+0x22/0x50 [ 45.241199] __kasan_record_aux_stack+0x8e/0xa0 [ 45.241755] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.242385] remove_vma+0x139/0x170 [ 45.242832] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.243376] do_vmi_munmap+0x1f1/0x2b0 [ 45.243853] __vm_munmap+0x138/0x3a0 [ 45.244308] __x64_sys_munmap+0x59/0x80 [ 45.244811] do_syscall_64+0x3f/0x90 [ 45.245270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.245894] [ 45.246108] The buggy address belongs to the object at ffff88800c991488 [ 45.246108] which belongs to the cache vm_area_struct of size 168 [ 45.247536] The buggy address is located 88 bytes inside of [ 45.247536] freed 168-byte region [ffff88800c991488, ffff88800c991530) [ 45.248915] [ 45.249128] The buggy address belongs to the physical page: [ 45.249773] page:000000006f4b978c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc991 [ 45.250838] memcg:ffff888009891c01 [ 45.251267] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.251903] page_type: 0xffffffff() [ 45.252343] raw: 0100000000000200 ffff88800879fc80 ffffea00003895c0 dead000000000008 [ 45.253255] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009891c01 [ 45.254139] page dumped because: kasan: bad access detected [ 45.254783] [ 45.254994] Memory state around the buggy address: [ 45.255554] ffff88800c991380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 45.256395] ffff88800c991400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 45.257234] >ffff88800c991480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.258065] ^ [ 45.258805] ffff88800c991500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 45.259632] ffff88800c991580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.260479] ================================================================== [ 45.261513] Disabling lock debugging due to kernel taint [ 47.120818] BUG: Bad rss-counter state mm:00000000efce94ac type:MM_FILEPAGES val:33 [ 47.121594] BUG: Bad rss-counter state mm:00000000efce94ac type:MM_ANONPAGES val:22 [ 47.583574] BUG: Bad rss-counter state mm:0000000051082982 type:MM_FILEPAGES val:33 [ 47.584686] BUG: Bad rss-counter state mm:0000000051082982 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32343' (ECDSA) to the list of known hosts. 2023/06/19 13:20:29 fuzzer started 2023/06/19 13:20:29 dialing manager at localhost:44161 2023/06/19 13:20:29 checking machine... 2023/06/19 13:20:29 checking revisions... [ 48.309392] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:20:29 testing simple program... [ 48.363065] cgroup: Unknown subsys name 'net' [ 48.402656] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:20:23 Registers: info registers vcpu 0 RAX=0000000080010000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015a651c0 RSI=ffffffff813c7da6 RDI=ffffffff8562bd40 RBP=ffff88806ce09db8 RSP=ffff88806ce09cf0 R8 =0000000000000000 R9 =fffffbfff0a81e50 R10=ffffffff8540f283 R11=ffff88806ce09ff8 R12=dffffc0000000000 R13=0000000b06292500 R14=ffff888015ad7688 R15=dffffc0000000000 RIP=ffffffff8452fd04 RFL=00000046 [---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 00007f446f18c900 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=00007fff4dc9f000 CR3=000000000fa72000 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=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=00007f980ed82200 CR3=000000000cb10000 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=00000000000000000000000000000000 XMM01=282f8bcd52fe1494734417e87bb92d96 XMM02=000000000011de48eff9b2d0a8fce9cb XMM03=000000000011df182c67c8bc2e329bc3 XMM04=d330eaf142d6673e00000000000ae988 XMM05=5dfb906b0dde000600000000001352f0 XMM06=806171799158d9670000000000134020 XMM07=e042d86d42eb936e0000000000124b30 XMM08=6fab8981d96e008b000000000011df18 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000