syzkaller login: [ 30.423214] BUG: Bad rss-counter state mm:000000002590a673 type:MM_FILEPAGES val:33 [ 30.424464] BUG: Bad rss-counter state mm:000000002590a673 type:MM_ANONPAGES val:22 [ 30.576173] ================================================================== [ 30.577178] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.578186] Read of size 8 at addr ffff88800da39968 by task sshd/221 [ 30.579020] [ 30.579435] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.580378] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.581415] Call Trace: [ 30.581755] [ 30.582059] dump_stack_lvl+0x91/0xf0 [ 30.582579] print_report+0xcc/0x620 [ 30.583099] ? __virt_addr_valid+0x102/0x340 [ 30.583695] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.584372] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.585038] kasan_report+0xbe/0xf0 [ 30.585544] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.586210] vma_interval_tree_remove+0xc75/0xec0 [ 30.586872] vma_prepare+0xc54/0x11a0 [ 30.587400] __split_vma+0x5af/0x950 [ 30.588022] ? __pfx___split_vma+0x10/0x10 [ 30.588625] ? find_held_lock+0x2c/0x110 [ 30.589201] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.589825] ? lock_is_held_type+0x9f/0x120 [ 30.590422] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.591096] ? mtree_range_walk+0x632/0x900 [ 30.591704] ? mas_walk+0x5c7/0x7c0 [ 30.592252] do_vmi_munmap+0x1f1/0x2b0 [ 30.592793] mmap_region+0x1f9/0x2660 [ 30.593324] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.593892] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.594684] ? __pfx_lock_acquire+0x10/0x10 [ 30.595276] ? __pfx_mmap_region+0x10/0x10 [ 30.595861] ? security_mmap_addr+0x7d/0xa0 [ 30.596457] ? get_unmapped_area+0x1f5/0x3f0 [ 30.597065] do_mmap+0x854/0xf00 [ 30.597551] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.598100] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.598715] ksys_mmap_pgoff+0x3af/0x500 [ 30.599276] do_syscall_64+0x3f/0x90 [ 30.599803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.600529] RIP: 0033:0x7f4cf7802d82 [ 30.601036] 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 [ 30.603387] RSP: 002b:00007ffe0de52b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.604405] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4cf7802d82 [ 30.605344] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4cf6c3c000 [ 30.606279] RBP: 00007f4cf6c3c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.607215] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559373d8fb20 [ 30.608155] R13: 00007ffe0de52b30 R14: 00007ffe0de52b60 R15: 00007ffe0de52ec0 [ 30.609102] [ 30.609427] [ 30.609663] Allocated by task 214: [ 30.610140] kasan_save_stack+0x22/0x50 [ 30.610701] kasan_set_track+0x25/0x30 [ 30.611246] __kasan_slab_alloc+0x59/0x70 [ 30.611827] kmem_cache_alloc+0x16b/0x370 [ 30.612400] vm_area_dup+0x20/0x160 [ 30.612906] __split_vma+0x170/0x950 [ 30.613420] split_vma+0xc6/0x110 [ 30.613910] mprotect_fixup+0x8d2/0xb30 [ 30.614465] do_mprotect_pkey+0x87e/0xd40 [ 30.615043] __x64_sys_mprotect+0x78/0xc0 [ 30.615618] do_syscall_64+0x3f/0x90 [ 30.616165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.616880] [ 30.617120] Freed by task 214: [ 30.617552] kasan_save_stack+0x22/0x50 [ 30.618108] kasan_set_track+0x25/0x30 [ 30.618652] kasan_save_free_info+0x2b/0x50 [ 30.619241] __kasan_slab_free+0x10a/0x190 [ 30.619830] kmem_cache_free+0x10d/0x4d0 [ 30.620464] rcu_core+0x8c8/0x2860 [ 30.620958] __do_softirq+0x1b7/0x7d4 [ 30.621485] [ 30.621723] Last potentially related work creation: [ 30.622371] kasan_save_stack+0x22/0x50 [ 30.622931] __kasan_record_aux_stack+0x8e/0xa0 [ 30.623566] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.624344] remove_vma+0x139/0x170 [ 30.624835] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.625415] do_vmi_munmap+0x1f1/0x2b0 [ 30.625908] __vm_munmap+0x138/0x3a0 [ 30.626395] __x64_sys_munmap+0x59/0x80 [ 30.626893] do_syscall_64+0x3f/0x90 [ 30.627392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.628085] [ 30.628310] Second to last potentially related work creation: [ 30.629016] kasan_save_stack+0x22/0x50 [ 30.629525] __kasan_record_aux_stack+0x8e/0xa0 [ 30.630116] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.630760] remove_vma+0x139/0x170 [ 30.631231] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.631791] do_vmi_munmap+0x1f1/0x2b0 [ 30.632325] mmap_region+0x1f9/0x2660 [ 30.632820] do_mmap+0x854/0xf00 [ 30.633278] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.633777] ksys_mmap_pgoff+0x3af/0x500 [ 30.634300] do_syscall_64+0x3f/0x90 [ 30.634778] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.635453] [ 30.635667] The buggy address belongs to the object at ffff88800da39910 [ 30.635667] which belongs to the cache vm_area_struct of size 168 [ 30.637219] The buggy address is located 88 bytes inside of [ 30.637219] freed 168-byte region [ffff88800da39910, ffff88800da399b8) [ 30.638692] [ 30.638914] The buggy address belongs to the physical page: [ 30.639596] page:000000009cc788fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda39 [ 30.640757] memcg:ffff888019ae4c01 [ 30.641211] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.641931] page_type: 0xffffffff() [ 30.642392] raw: 0100000000000200 ffff8880087a0c80 ffffea000039c040 000000000000000b [ 30.643332] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ae4c01 [ 30.644273] page dumped because: kasan: bad access detected [ 30.644946] [ 30.645173] Memory state around the buggy address: [ 30.645765] ffff88800da39800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.646650] ffff88800da39880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.647536] >ffff88800da39900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.648422] ^ [ 30.649220] ffff88800da39980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.650116] ffff88800da39a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.650992] ================================================================== [ 30.651910] Disabling lock debugging due to kernel taint [ 33.214604] BUG: Bad rss-counter state mm:00000000f43ef9b8 type:MM_FILEPAGES val:33 [ 33.215234] BUG: Bad rss-counter state mm:00000000f43ef9b8 type:MM_ANONPAGES val:22 [ 33.618276] BUG: Bad rss-counter state mm:00000000f6ddb766 type:MM_FILEPAGES val:33 [ 33.618900] BUG: Bad rss-counter state mm:00000000f6ddb766 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7311' (ECDSA) to the list of known hosts. 2023/06/21 07:15:57 fuzzer started 2023/06/21 07:15:57 dialing manager at localhost:36067 2023/06/21 07:15:57 checking machine... 2023/06/21 07:15:57 checking revisions... [ 34.271726] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:15:57 testing simple program... [ 34.322382] cgroup: Unknown subsys name 'net' [ 34.378511] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:15:57 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fa053336ea0 CR3=00000000094ac000 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=2036353a35313a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a35313a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=00007f80b42aa000 RCX=ffffffff844a919c RDX=ffff888016ed1b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888016f7d600 RSP=ffff88800ee77b20 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=0000000000000000 R12=000000000000000e R13=dffffc0000000000 R14=ffff888016afd008 R15=ffff88800ee77e70 RIP=ffffffff844a91ad RFL=00000297 [--S-APC] 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 00007f80b42cf900 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=00007f80b42ae020 CR3=00000000165c8000 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