syzkaller login: [ 31.059105] BUG: Bad rss-counter state mm:0000000019550f5f type:MM_FILEPAGES val:33 [ 31.060107] BUG: Bad rss-counter state mm:0000000019550f5f type:MM_ANONPAGES val:22 [ 31.217698] ================================================================== [ 31.218810] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.219939] Read of size 8 at addr ffff88800e2fbdf0 by task sshd/220 [ 31.221062] [ 31.221365] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.222341] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.223357] Call Trace: [ 31.223683] [ 31.223969] dump_stack_lvl+0x91/0xf0 [ 31.224458] print_report+0xcc/0x620 [ 31.224949] ? __virt_addr_valid+0x102/0x340 [ 31.225514] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.226139] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.226769] kasan_report+0xbe/0xf0 [ 31.227251] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.227887] vma_interval_tree_remove+0xc75/0xec0 [ 31.228518] vma_prepare+0xc54/0x11a0 [ 31.229016] __split_vma+0x5af/0x950 [ 31.229506] ? __pfx___split_vma+0x10/0x10 [ 31.230038] ? find_held_lock+0x2c/0x110 [ 31.230573] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.231161] ? lock_is_held_type+0x9f/0x120 [ 31.231714] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.232333] ? mtree_range_walk+0x632/0x900 [ 31.232897] ? mas_walk+0x5c7/0x7c0 [ 31.233404] do_vmi_munmap+0x1f1/0x2b0 [ 31.233906] mmap_region+0x1f9/0x2660 [ 31.234406] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.234933] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.235667] ? __pfx_lock_acquire+0x10/0x10 [ 31.236224] ? __pfx_mmap_region+0x10/0x10 [ 31.236766] ? security_mmap_addr+0x7d/0xa0 [ 31.237315] ? get_unmapped_area+0x1f5/0x3f0 [ 31.237902] do_mmap+0x854/0xf00 [ 31.238355] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.238851] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.239433] ksys_mmap_pgoff+0x3af/0x500 [ 31.239956] do_syscall_64+0x3f/0x90 [ 31.240438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.241086] RIP: 0033:0x7f1d22cbed82 [ 31.241564] 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 [ 31.243718] RSP: 002b:00007ffeda7b0098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.244629] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d22cbed82 [ 31.245500] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d220f8000 [ 31.246387] RBP: 00007f1d220f8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.247265] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559d69f0aec0 [ 31.248130] R13: 00007ffeda7b00b0 R14: 00007ffeda7b00e0 R15: 00007ffeda7b0440 [ 31.249030] [ 31.249346] [ 31.249573] Allocated by task 213: [ 31.250012] kasan_save_stack+0x22/0x50 [ 31.250519] kasan_set_track+0x25/0x30 [ 31.251022] __kasan_slab_alloc+0x59/0x70 [ 31.251555] kmem_cache_alloc+0x16b/0x370 [ 31.252078] vm_area_dup+0x20/0x160 [ 31.252550] __split_vma+0x170/0x950 [ 31.253022] split_vma+0xc6/0x110 [ 31.253484] mprotect_fixup+0x8d2/0xb30 [ 31.254004] do_mprotect_pkey+0x87e/0xd40 [ 31.254543] __x64_sys_mprotect+0x78/0xc0 [ 31.255071] do_syscall_64+0x3f/0x90 [ 31.255567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.256244] [ 31.256469] Freed by task 213: [ 31.256882] kasan_save_stack+0x22/0x50 [ 31.257426] kasan_set_track+0x25/0x30 [ 31.257933] kasan_save_free_info+0x2b/0x50 [ 31.258487] __kasan_slab_free+0x10a/0x190 [ 31.259027] kmem_cache_free+0x10d/0x4d0 [ 31.259551] rcu_core+0x8c8/0x2860 [ 31.260008] __do_softirq+0x1b7/0x7d4 [ 31.260492] [ 31.260710] Last potentially related work creation: [ 31.261324] kasan_save_stack+0x22/0x50 [ 31.261892] __kasan_record_aux_stack+0x8e/0xa0 [ 31.262505] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.263173] remove_vma+0x139/0x170 [ 31.263625] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.264180] do_vmi_munmap+0x1f1/0x2b0 [ 31.264676] __vm_munmap+0x138/0x3a0 [ 31.265146] __x64_sys_munmap+0x59/0x80 [ 31.265683] do_syscall_64+0x3f/0x90 [ 31.266163] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.266820] [ 31.267045] Second to last potentially related work creation: [ 31.267737] kasan_save_stack+0x22/0x50 [ 31.268244] __kasan_record_aux_stack+0x8e/0xa0 [ 31.268829] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.269493] remove_vma+0x139/0x170 [ 31.269956] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.270519] do_vmi_munmap+0x1f1/0x2b0 [ 31.271012] mmap_region+0x1f9/0x2660 [ 31.271496] do_mmap+0x854/0xf00 [ 31.271931] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.272433] ksys_mmap_pgoff+0x3af/0x500 [ 31.272937] do_syscall_64+0x3f/0x90 [ 31.273424] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.274081] [ 31.274309] The buggy address belongs to the object at ffff88800e2fbd98 [ 31.274309] which belongs to the cache vm_area_struct of size 168 [ 31.275867] The buggy address is located 88 bytes inside of [ 31.275867] freed 168-byte region [ffff88800e2fbd98, ffff88800e2fbe40) [ 31.277366] [ 31.277589] The buggy address belongs to the physical page: [ 31.278288] page:000000006f306349 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2fb [ 31.279452] memcg:ffff88800d439501 [ 31.279904] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.280586] page_type: 0xffffffff() [ 31.281056] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a60c0 0000000000000006 [ 31.282043] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d439501 [ 31.283002] page dumped because: kasan: bad access detected [ 31.283695] [ 31.283920] Memory state around the buggy address: [ 31.284530] ffff88800e2fbc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.285451] ffff88800e2fbd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.286354] >ffff88800e2fbd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.287244] ^ [ 31.288100] ffff88800e2fbe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.289002] ffff88800e2fbe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.289903] ================================================================== [ 31.290860] Disabling lock debugging due to kernel taint [ 33.279093] BUG: Bad rss-counter state mm:00000000ba8a58d1 type:MM_FILEPAGES val:33 [ 33.280184] BUG: Bad rss-counter state mm:00000000ba8a58d1 type:MM_ANONPAGES val:22 [ 33.723865] BUG: Bad rss-counter state mm:000000008ce10550 type:MM_FILEPAGES val:33 [ 33.724669] BUG: Bad rss-counter state mm:000000008ce10550 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49866' (ECDSA) to the list of known hosts. 2023/06/20 22:33:59 fuzzer started 2023/06/20 22:33:59 dialing manager at localhost:36067 2023/06/20 22:33:59 checking machine... 2023/06/20 22:33:59 checking revisions... [ 34.388992] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:33:59 testing simple program... [ 34.438795] cgroup: Unknown subsys name 'net' [ 34.502182] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:33:59 Registers: info registers vcpu 0 RAX=ffffffff86138e8c RBX=0000000000000002 RCX=ffffffff86138e8c RDX=dffffc0000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86138e90 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09bd0 R15=ffff88806ce09a98 RIP=ffffffff81130b6b 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 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=00007ff460eb2a10 CR3=000000000d8ba000 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=2039353a33333a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a33333a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c857a RDI=ffff8880169c3a74 RBP=ffff8880169c3680 RSP=ffff888016cc7788 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff8880169c3680 R13=0000000000000000 R14=ffffffff85652d08 R15=0000000000000002 RIP=ffffffff81374525 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 00007f8d67002900 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=00007f8d66fac008 CR3=0000000016a46000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000