syzkaller login: [ 30.885617] BUG: Bad rss-counter state mm:00000000fff64426 type:MM_FILEPAGES val:33 [ 30.886877] BUG: Bad rss-counter state mm:00000000fff64426 type:MM_ANONPAGES val:22 [ 30.928530] ================================================================== [ 30.929562] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.930679] Read of size 8 at addr ffff888015ca0c20 by task sshd/220 [ 30.931601] [ 30.931830] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.932867] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.933967] Call Trace: [ 30.934364] [ 30.934665] dump_stack_lvl+0x91/0xf0 [ 30.935232] print_report+0xcc/0x620 [ 30.935837] ? __virt_addr_valid+0x102/0x340 [ 30.936488] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.937133] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.937800] kasan_report+0xbe/0xf0 [ 30.938360] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.938995] vma_interval_tree_remove+0xc75/0xec0 [ 30.939596] vma_prepare+0xc54/0x11a0 [ 30.940088] __split_vma+0x5af/0x950 [ 30.940574] ? __pfx___split_vma+0x10/0x10 [ 30.941111] ? find_held_lock+0x2c/0x110 [ 30.941636] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.942210] ? lock_is_held_type+0x9f/0x120 [ 30.942760] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.943378] ? mtree_range_walk+0x632/0x900 [ 30.943944] ? mas_walk+0x5c7/0x7c0 [ 30.944435] do_vmi_munmap+0x1f1/0x2b0 [ 30.944936] mmap_region+0x1f9/0x2660 [ 30.945416] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.945945] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.946662] ? __pfx_lock_acquire+0x10/0x10 [ 30.947206] ? __pfx_mmap_region+0x10/0x10 [ 30.947745] ? security_mmap_addr+0x7d/0xa0 [ 30.948292] ? get_unmapped_area+0x1f5/0x3f0 [ 30.948872] do_mmap+0x854/0xf00 [ 30.949322] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.949821] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.950393] ksys_mmap_pgoff+0x3af/0x500 [ 30.950914] do_syscall_64+0x3f/0x90 [ 30.951407] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.952074] RIP: 0033:0x7f998e661d82 [ 30.952546] 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 [ 30.954701] RSP: 002b:00007ffd8ba2bbd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.955628] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f998e661d82 [ 30.956514] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f998da9b000 [ 30.957385] RBP: 00007f998da9b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.958247] R10: 0000000000000812 R11: 0000000000000206 R12: 00005576795b5ec0 [ 30.959086] R13: 00007ffd8ba2bbf0 R14: 00007ffd8ba2bc20 R15: 00007ffd8ba2bf80 [ 30.959953] [ 30.960264] [ 30.960497] Allocated by task 213: [ 30.960927] kasan_save_stack+0x22/0x50 [ 30.961449] kasan_set_track+0x25/0x30 [ 30.961937] __kasan_slab_alloc+0x59/0x70 [ 30.962479] kmem_cache_alloc+0x16b/0x370 [ 30.962989] vm_area_dup+0x20/0x160 [ 30.963451] __split_vma+0x170/0x950 [ 30.963921] split_vma+0xc6/0x110 [ 30.964380] mprotect_fixup+0x8d2/0xb30 [ 30.964883] do_mprotect_pkey+0x87e/0xd40 [ 30.965421] __x64_sys_mprotect+0x78/0xc0 [ 30.965944] do_syscall_64+0x3f/0x90 [ 30.966431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.967078] [ 30.967292] Freed by task 203: [ 30.967694] kasan_save_stack+0x22/0x50 [ 30.968197] kasan_set_track+0x25/0x30 [ 30.968725] kasan_save_free_info+0x2b/0x50 [ 30.969253] __kasan_slab_free+0x10a/0x190 [ 30.969800] kmem_cache_free+0x10d/0x4d0 [ 30.970306] rcu_core+0x8c8/0x2860 [ 30.970769] __do_softirq+0x1b7/0x7d4 [ 30.971242] [ 30.971465] Last potentially related work creation: [ 30.972055] kasan_save_stack+0x22/0x50 [ 30.972588] __kasan_record_aux_stack+0x8e/0xa0 [ 30.973161] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.973814] remove_vma+0x139/0x170 [ 30.974358] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.974934] do_vmi_munmap+0x1f1/0x2b0 [ 30.975420] __vm_munmap+0x138/0x3a0 [ 30.975892] __x64_sys_munmap+0x59/0x80 [ 30.976412] do_syscall_64+0x3f/0x90 [ 30.976908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.977557] [ 30.977785] The buggy address belongs to the object at ffff888015ca0bc8 [ 30.977785] which belongs to the cache vm_area_struct of size 168 [ 30.979271] The buggy address is located 88 bytes inside of [ 30.979271] freed 168-byte region [ffff888015ca0bc8, ffff888015ca0c70) [ 30.980748] [ 30.980963] The buggy address belongs to the physical page: [ 30.981619] page:00000000ccd890c8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15ca0 [ 30.982724] memcg:ffff88800ef5e401 [ 30.983151] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.983812] page_type: 0xffffffff() [ 30.984258] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.985201] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef5e401 [ 30.986129] page dumped because: kasan: bad access detected [ 30.986791] [ 30.987011] Memory state around the buggy address: [ 30.987588] ffff888015ca0b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.988481] ffff888015ca0b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.989359] >ffff888015ca0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.990221] ^ [ 30.990750] ffff888015ca0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.991628] ffff888015ca0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.992506] ================================================================== [ 30.993525] Disabling lock debugging due to kernel taint [ 33.703605] BUG: Bad rss-counter state mm:00000000bcb06937 type:MM_FILEPAGES val:33 [ 33.704825] BUG: Bad rss-counter state mm:00000000bcb06937 type:MM_ANONPAGES val:22 [ 34.176284] BUG: Bad rss-counter state mm:00000000dc76dee0 type:MM_FILEPAGES val:33 [ 34.177292] BUG: Bad rss-counter state mm:00000000dc76dee0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15221' (ECDSA) to the list of known hosts. 2023/06/20 15:37:30 fuzzer started 2023/06/20 15:37:31 dialing manager at localhost:36067 2023/06/20 15:37:31 checking machine... 2023/06/20 15:37:31 checking revisions... [ 34.904638] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:37:31 testing simple program... [ 34.943973] cgroup: Unknown subsys name 'net' [ 35.006963] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:37:30 Registers: info registers vcpu 0 RAX=ffffffff81288ac5 RBX=0000000000000001 RCX=ffffffff864b3801 RDX=ffff88806ce09ae0 RSI=ffffffff81288ac5 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b381e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b547f R12=ffff88806ce09b60 R13=ffff88806ce09ae0 R14=ffffffff8542a6c0 R15=ffff88806ce09a98 RIP=ffffffff81130641 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=00007f1b447101e0 CR3=000000000d8fc000 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=2030333a37333a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a37333a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800c618001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800c617b01 RSI=ffff88800c617bd8 RDI=ffff88800c6176e8 RBP=ffff88800c617730 RSP=ffff88800c617650 R8 =0000000000000001 R9 =ffff88800c617718 R10=0000000000038001 R11=00000000000b3fb2 R12=ffff88800c617738 R13=ffff88800c610000 R14=ffff88800c617bd8 R15=ffff88800c6176d8 RIP=ffffffff811304d1 RFL=00000282 [--S----] 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 00007fd16b099900 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=00007fd16b052008 CR3=0000000015ce0000 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