syzkaller login: [ 39.102772] BUG: Bad rss-counter state mm:0000000008fec2b0 type:MM_FILEPAGES val:33 [ 39.103869] BUG: Bad rss-counter state mm:0000000008fec2b0 type:MM_ANONPAGES val:22 [ 39.152474] ================================================================== [ 39.153451] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.154399] Read of size 8 at addr ffff8880168fa140 by task sshd/225 [ 39.155180] [ 39.155417] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.156322] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.157311] Call Trace: [ 39.157636] [ 39.157917] dump_stack_lvl+0x91/0xf0 [ 39.158446] print_report+0xcc/0x620 [ 39.158948] ? __virt_addr_valid+0x102/0x340 [ 39.159529] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.160162] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.160781] kasan_report+0xbe/0xf0 [ 39.161271] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.161888] vma_interval_tree_remove+0xc75/0xec0 [ 39.162498] vma_prepare+0xc54/0x11a0 [ 39.162999] __split_vma+0x5af/0x950 [ 39.163516] ? __pfx___split_vma+0x10/0x10 [ 39.164072] ? find_held_lock+0x2c/0x110 [ 39.164597] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.165181] ? lock_is_held_type+0x9f/0x120 [ 39.165722] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.166346] ? mtree_range_walk+0x632/0x900 [ 39.166908] ? mas_walk+0x5c7/0x7c0 [ 39.167406] do_vmi_munmap+0x1f1/0x2b0 [ 39.167906] mmap_region+0x1f9/0x2660 [ 39.168420] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.168947] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.169672] ? __pfx_lock_acquire+0x10/0x10 [ 39.170223] ? __pfx_mmap_region+0x10/0x10 [ 39.170759] ? security_mmap_addr+0x7d/0xa0 [ 39.171299] ? get_unmapped_area+0x1f5/0x3f0 [ 39.171926] do_mmap+0x854/0xf00 [ 39.172462] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.173087] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.173790] ksys_mmap_pgoff+0x3af/0x500 [ 39.174422] do_syscall_64+0x3f/0x90 [ 39.175008] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.175792] RIP: 0033:0x7fef12037d82 [ 39.176346] 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 [ 39.178999] RSP: 002b:00007fffa74c8b28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.180123] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fef12037d82 [ 39.181140] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fef11471000 [ 39.182158] RBP: 00007fef11471000 R08: 0000000000000009 R09: 0000000000001000 [ 39.183193] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c918a7ed90 [ 39.184252] R13: 00007fffa74c8b40 R14: 00007fffa74c8b70 R15: 00007fffa74c8ed0 [ 39.185309] [ 39.185670] [ 39.185937] Allocated by task 218: [ 39.186476] kasan_save_stack+0x22/0x50 [ 39.187110] kasan_set_track+0x25/0x30 [ 39.187729] __kasan_slab_alloc+0x59/0x70 [ 39.188407] kmem_cache_alloc+0x16b/0x370 [ 39.189063] vm_area_dup+0x20/0x160 [ 39.189626] __split_vma+0x170/0x950 [ 39.190215] split_vma+0xc6/0x110 [ 39.190759] mprotect_fixup+0x8d2/0xb30 [ 39.191420] do_mprotect_pkey+0x87e/0xd40 [ 39.192077] __x64_sys_mprotect+0x78/0xc0 [ 39.192721] do_syscall_64+0x3f/0x90 [ 39.193340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.194141] [ 39.194412] Freed by task 204: [ 39.194890] kasan_save_stack+0x22/0x50 [ 39.195532] kasan_set_track+0x25/0x30 [ 39.196151] kasan_save_free_info+0x2b/0x50 [ 39.196813] __kasan_slab_free+0x10a/0x190 [ 39.197493] kmem_cache_free+0x10d/0x4d0 [ 39.198153] rcu_core+0x8c8/0x2860 [ 39.198706] __do_softirq+0x1b7/0x7d4 [ 39.199310] [ 39.199585] Last potentially related work creation: [ 39.200321] kasan_save_stack+0x22/0x50 [ 39.200943] __kasan_record_aux_stack+0x8e/0xa0 [ 39.201669] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.202474] remove_vma+0x139/0x170 [ 39.203069] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.203776] do_vmi_munmap+0x1f1/0x2b0 [ 39.204388] __vm_munmap+0x138/0x3a0 [ 39.204965] __x64_sys_munmap+0x59/0x80 [ 39.205587] do_syscall_64+0x3f/0x90 [ 39.206177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.206974] [ 39.207239] Second to last potentially related work creation: [ 39.208121] kasan_save_stack+0x22/0x50 [ 39.208743] __kasan_record_aux_stack+0x8e/0xa0 [ 39.209472] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.210478] remove_vma+0x139/0x170 [ 39.211058] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.211764] do_vmi_munmap+0x1f1/0x2b0 [ 39.212376] mmap_region+0x1f9/0x2660 [ 39.213123] do_mmap+0x854/0xf00 [ 39.213733] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.214415] ksys_mmap_pgoff+0x3af/0x500 [ 39.215119] do_syscall_64+0x3f/0x90 [ 39.215814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.216707] [ 39.217004] The buggy address belongs to the object at ffff8880168fa0e8 [ 39.217004] which belongs to the cache vm_area_struct of size 168 [ 39.219043] The buggy address is located 88 bytes inside of [ 39.219043] freed 168-byte region [ffff8880168fa0e8, ffff8880168fa190) [ 39.221083] [ 39.221383] The buggy address belongs to the physical page: [ 39.222334] page:000000006acc0afa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168fa [ 39.223912] memcg:ffff888016030c01 [ 39.224525] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.225460] page_type: 0xffffffff() [ 39.226095] raw: 0100000000000200 ffff88800879fc80 ffffea0000583d00 0000000000000002 [ 39.227459] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016030c01 [ 39.228600] page dumped because: kasan: bad access detected [ 39.229396] [ 39.229652] Memory state around the buggy address: [ 39.230350] ffff8880168fa000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.231380] ffff8880168fa080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 39.232415] >ffff8880168fa100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.233431] ^ [ 39.234198] ffff8880168fa180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.235235] ffff8880168fa200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.236265] ================================================================== [ 39.237542] Disabling lock debugging due to kernel taint [ 41.073768] BUG: Bad rss-counter state mm:00000000c6a0ffe3 type:MM_FILEPAGES val:33 [ 41.074814] BUG: Bad rss-counter state mm:00000000c6a0ffe3 type:MM_ANONPAGES val:22 [ 41.478145] BUG: Bad rss-counter state mm:0000000084f74bb7 type:MM_FILEPAGES val:33 [ 41.478883] BUG: Bad rss-counter state mm:0000000084f74bb7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4839' (ECDSA) to the list of known hosts. 2023/06/20 00:49:17 fuzzer started 2023/06/20 00:49:18 dialing manager at localhost:44161 2023/06/20 00:49:18 checking machine... 2023/06/20 00:49:18 checking revisions... [ 42.107250] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:49:18 testing simple program... [ 42.159912] cgroup: Unknown subsys name 'net' [ 42.221213] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:49:17 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffe593b4b88 CR3=0000000005482000 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=00007ffb225c7510000055d9e7529790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00005584dd8f4ee0 RCX=0000000000000034 RDX=000000000000001b RSI=00005584dd9051e0 RDI=00005584dd903f70 RBP=00005584dd9051e0 RSP=00007ffd0b3d39d8 R8 =0000000000000000 R9 =000000000000001b R10=00007ffd0b3d3797 R11=0000000000000000 R12=00007ffd0b3d3a20 R13=00005584dd8e2ce0 R14=00007f6f5c9306f8 R15=00005584dd9051e0 RIP=00007f6f5ce7f327 RFL=00000283 [--S---C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6f5c930900 00000000 00000000 GS =0000 0000000000000000 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=00007f6f5cee80b0 CR3=000000000e9e6000 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=707465675f6c697475646f6d6d61705f XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=7465675f6c697475646f6d6d61705f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000