syzkaller login: [ 31.063667] BUG: Bad rss-counter state mm:00000000c4018726 type:MM_FILEPAGES val:33 [ 31.064748] BUG: Bad rss-counter state mm:00000000c4018726 type:MM_ANONPAGES val:22 [ 31.230695] ================================================================== [ 31.231619] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.232550] Read of size 8 at addr ffff888017328880 by task sshd/220 [ 31.233320] [ 31.233543] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.234581] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.235535] Call Trace: [ 31.235857] [ 31.236143] dump_stack_lvl+0x91/0xf0 [ 31.236633] print_report+0xcc/0x620 [ 31.237122] ? __virt_addr_valid+0x102/0x340 [ 31.237682] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.238320] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.238929] kasan_report+0xbe/0xf0 [ 31.239406] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.240021] vma_interval_tree_remove+0xc75/0xec0 [ 31.240622] vma_prepare+0xc54/0x11a0 [ 31.241106] __split_vma+0x5af/0x950 [ 31.241579] ? __pfx___split_vma+0x10/0x10 [ 31.242143] ? find_held_lock+0x2c/0x110 [ 31.242718] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.243334] ? lock_is_held_type+0x9f/0x120 [ 31.243926] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.244599] ? mtree_range_walk+0x632/0x900 [ 31.245204] ? mas_walk+0x5c7/0x7c0 [ 31.245721] do_vmi_munmap+0x1f1/0x2b0 [ 31.246271] mmap_region+0x1f9/0x2660 [ 31.246798] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.247364] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.248150] ? __pfx_lock_acquire+0x10/0x10 [ 31.248743] ? __pfx_mmap_region+0x10/0x10 [ 31.249322] ? security_mmap_addr+0x7d/0xa0 [ 31.249902] ? get_unmapped_area+0x1f5/0x3f0 [ 31.250530] do_mmap+0x854/0xf00 [ 31.251012] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.251563] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.252176] ksys_mmap_pgoff+0x3af/0x500 [ 31.252732] do_syscall_64+0x3f/0x90 [ 31.253266] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.253972] RIP: 0033:0x7f2ced830d82 [ 31.254484] 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 [ 31.256847] RSP: 002b:00007ffe1e386938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.257844] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2ced830d82 [ 31.258783] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2cecc6a000 [ 31.259714] RBP: 00007f2cecc6a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.260643] R10: 0000000000000812 R11: 0000000000000206 R12: 000055885b099f70 [ 31.261580] R13: 00007ffe1e386950 R14: 00007ffe1e386980 R15: 00007ffe1e386ce0 [ 31.262553] [ 31.262874] [ 31.263111] Allocated by task 213: [ 31.263587] kasan_save_stack+0x22/0x50 [ 31.264143] kasan_set_track+0x25/0x30 [ 31.264688] __kasan_slab_alloc+0x59/0x70 [ 31.265271] kmem_cache_alloc+0x16b/0x370 [ 31.265837] vm_area_dup+0x20/0x160 [ 31.266351] __split_vma+0x170/0x950 [ 31.266867] split_vma+0xc6/0x110 [ 31.267348] mprotect_fixup+0x8d2/0xb30 [ 31.267896] do_mprotect_pkey+0x87e/0xd40 [ 31.268471] __x64_sys_mprotect+0x78/0xc0 [ 31.269039] do_syscall_64+0x3f/0x90 [ 31.269561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.270296] [ 31.270537] Freed by task 213: [ 31.270970] kasan_save_stack+0x22/0x50 [ 31.271527] kasan_set_track+0x25/0x30 [ 31.272071] kasan_save_free_info+0x2b/0x50 [ 31.272656] __kasan_slab_free+0x10a/0x190 [ 31.273236] kmem_cache_free+0x10d/0x4d0 [ 31.273800] rcu_core+0x8c8/0x2860 [ 31.274300] __do_softirq+0x1b7/0x7d4 [ 31.274890] [ 31.275126] Last potentially related work creation: [ 31.275766] kasan_save_stack+0x22/0x50 [ 31.276320] __kasan_record_aux_stack+0x8e/0xa0 [ 31.276948] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.277653] remove_vma+0x139/0x170 [ 31.278154] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.278793] do_vmi_munmap+0x1f1/0x2b0 [ 31.279329] __vm_munmap+0x138/0x3a0 [ 31.279842] __x64_sys_munmap+0x59/0x80 [ 31.280384] do_syscall_64+0x3f/0x90 [ 31.280907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.281620] [ 31.281864] The buggy address belongs to the object at ffff888017328828 [ 31.281864] which belongs to the cache vm_area_struct of size 168 [ 31.283492] The buggy address is located 88 bytes inside of [ 31.283492] freed 168-byte region [ffff888017328828, ffff8880173288d0) [ 31.285047] [ 31.285285] The buggy address belongs to the physical page: [ 31.286018] page:00000000950a0c5a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17328 [ 31.287227] memcg:ffff88800cd37501 [ 31.287693] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.288389] page_type: 0xffffffff() [ 31.288880] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.289893] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cd37501 [ 31.290917] page dumped because: kasan: bad access detected [ 31.291649] [ 31.291883] Memory state around the buggy address: [ 31.292522] ffff888017328780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.293456] ffff888017328800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.294409] >ffff888017328880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.295339] ^ [ 31.295790] ffff888017328900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.296729] ffff888017328980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.297655] ================================================================== [ 31.298710] Disabling lock debugging due to kernel taint [ 33.268594] BUG: Bad rss-counter state mm:00000000d032995b type:MM_FILEPAGES val:33 [ 33.269765] BUG: Bad rss-counter state mm:00000000d032995b type:MM_ANONPAGES val:22 [ 33.745592] BUG: Bad rss-counter state mm:0000000074d62f11 type:MM_FILEPAGES val:33 [ 33.746760] BUG: Bad rss-counter state mm:0000000074d62f11 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48852' (ECDSA) to the list of known hosts. 2023/06/20 15:55:13 fuzzer started 2023/06/20 15:55:13 dialing manager at localhost:36067 2023/06/20 15:55:13 checking machine... 2023/06/20 15:55:13 checking revisions... [ 34.468798] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:55:13 testing simple program... [ 34.519755] cgroup: Unknown subsys name 'net' [ 34.580187] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:55:13 Registers: info registers vcpu 0 RAX=0000000000000441 RBX=0000556c11a43ee0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000556c11a55700 RDI=0000556c11a55700 RBP=0000556c11a52fa0 RSP=00007fffdcf23640 R8 =0000000000000007 R9 =00007fffdcf1ca28 R10=0000556c11a522c0 R11=0000000000000246 R12=0000556c11a2c350 R13=0000000000000000 R14=00007fffdcf23a40 R15=00007fffdcf237f0 RIP=00007f3bd939d740 RFL=00000206 [-----P-] 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 00007f3bd8f1f900 00000000 00000000 GS =0000 0000000000000000 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=00007fffdcf1d000 CR3=000000000d552000 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=6720646572637465733a4d41503d706f 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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fa3ad0992b0 CR3=000000000e6a4000 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=2033313a35353a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a35353a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000