syzkaller login: [ 36.789182] BUG: Bad rss-counter state mm:00000000394d0e12 type:MM_FILEPAGES val:33 [ 36.790425] BUG: Bad rss-counter state mm:00000000394d0e12 type:MM_ANONPAGES val:22 [ 36.955272] ================================================================== [ 36.956232] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.957239] Read of size 8 at addr ffff88801807ac20 by task sshd/220 [ 36.958144] [ 36.958399] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.959321] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.960354] Call Trace: [ 36.960698] [ 36.961004] dump_stack_lvl+0x91/0xf0 [ 36.961526] print_report+0xcc/0x620 [ 36.962040] ? __virt_addr_valid+0x102/0x340 [ 36.962632] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.963284] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.963940] kasan_report+0xbe/0xf0 [ 36.964450] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.965110] vma_interval_tree_remove+0xc75/0xec0 [ 36.965757] vma_prepare+0xc54/0x11a0 [ 36.966270] __split_vma+0x5af/0x950 [ 36.966797] ? __pfx___split_vma+0x10/0x10 [ 36.967387] ? find_held_lock+0x2c/0x110 [ 36.967944] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.968563] ? lock_is_held_type+0x9f/0x120 [ 36.969156] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.969808] ? mtree_range_walk+0x632/0x900 [ 36.970413] ? mas_walk+0x5c7/0x7c0 [ 36.970930] do_vmi_munmap+0x1f1/0x2b0 [ 36.971462] mmap_region+0x1f9/0x2660 [ 36.971983] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.972529] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.973292] ? __pfx_lock_acquire+0x10/0x10 [ 36.973875] ? __pfx_mmap_region+0x10/0x10 [ 36.974466] ? security_mmap_addr+0x7d/0xa0 [ 36.975047] ? get_unmapped_area+0x1f5/0x3f0 [ 36.975657] do_mmap+0x854/0xf00 [ 36.976120] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.976666] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.977276] ksys_mmap_pgoff+0x3af/0x500 [ 36.977818] do_syscall_64+0x3f/0x90 [ 36.978350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.979040] RIP: 0033:0x7f02fe598d82 [ 36.979530] 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 [ 36.981792] RSP: 002b:00007ffd36754fc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.982774] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f02fe598d82 [ 36.983681] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f02fd9d2000 [ 36.984593] RBP: 00007f02fd9d2000 R08: 0000000000000009 R09: 0000000000001000 [ 36.985499] R10: 0000000000000812 R11: 0000000000000206 R12: 000055813ec7dec0 [ 36.986415] R13: 00007ffd36754fe0 R14: 00007ffd36755010 R15: 00007ffd36755370 [ 36.987326] [ 36.987642] [ 36.987868] Allocated by task 213: [ 36.988322] kasan_save_stack+0x22/0x50 [ 36.988862] kasan_set_track+0x25/0x30 [ 36.989396] __kasan_slab_alloc+0x59/0x70 [ 36.989948] kmem_cache_alloc+0x16b/0x370 [ 36.990526] vm_area_dup+0x20/0x160 [ 36.991012] __split_vma+0x170/0x950 [ 36.991520] split_vma+0xc6/0x110 [ 36.991992] mprotect_fixup+0x8d2/0xb30 [ 36.992525] do_mprotect_pkey+0x87e/0xd40 [ 36.993088] __x64_sys_mprotect+0x78/0xc0 [ 36.993647] do_syscall_64+0x3f/0x90 [ 36.994155] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.994846] [ 36.995077] Freed by task 213: [ 36.995497] kasan_save_stack+0x22/0x50 [ 36.996028] kasan_set_track+0x25/0x30 [ 36.996553] kasan_save_free_info+0x2b/0x50 [ 36.997122] __kasan_slab_free+0x10a/0x190 [ 36.997694] kmem_cache_free+0x10d/0x4d0 [ 36.998244] rcu_core+0x8c8/0x2860 [ 36.998857] __do_softirq+0x1b7/0x7d4 [ 36.999463] [ 36.999724] Last potentially related work creation: [ 37.000434] kasan_save_stack+0x22/0x50 [ 37.001049] __kasan_record_aux_stack+0x8e/0xa0 [ 37.001740] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.002531] remove_vma+0x139/0x170 [ 37.003097] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.003778] do_vmi_munmap+0x1f1/0x2b0 [ 37.004381] __vm_munmap+0x138/0x3a0 [ 37.004942] __x64_sys_munmap+0x59/0x80 [ 37.005543] do_syscall_64+0x3f/0x90 [ 37.006131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.006920] [ 37.007166] The buggy address belongs to the object at ffff88801807abc8 [ 37.007166] which belongs to the cache vm_area_struct of size 168 [ 37.008629] The buggy address is located 88 bytes inside of [ 37.008629] freed 168-byte region [ffff88801807abc8, ffff88801807ac70) [ 37.010074] [ 37.010299] The buggy address belongs to the physical page: [ 37.010993] page:000000009baa4ae0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1807a [ 37.012111] memcg:ffff888016fac701 [ 37.012548] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.013189] page_type: 0xffffffff() [ 37.013639] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.014565] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016fac701 [ 37.015460] page dumped because: kasan: bad access detected [ 37.016114] [ 37.016328] Memory state around the buggy address: [ 37.016906] ffff88801807ab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.017754] ffff88801807ab80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 37.018611] >ffff88801807ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 37.019456] ^ [ 37.019988] ffff88801807ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 37.020833] ffff88801807ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 37.021688] ================================================================== [ 37.022707] Disabling lock debugging due to kernel taint [ 39.602233] BUG: Bad rss-counter state mm:00000000a5ff1336 type:MM_FILEPAGES val:33 [ 39.603754] BUG: Bad rss-counter state mm:00000000a5ff1336 type:MM_ANONPAGES val:22 [ 40.118528] BUG: Bad rss-counter state mm:00000000a630819c type:MM_FILEPAGES val:33 [ 40.119273] BUG: Bad rss-counter state mm:00000000a630819c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18412' (ECDSA) to the list of known hosts. 2023/06/20 04:39:27 fuzzer started 2023/06/20 04:39:27 dialing manager at localhost:44161 2023/06/20 04:39:27 checking machine... 2023/06/20 04:39:27 checking revisions... [ 40.746085] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:39:27 testing simple program... [ 40.783519] cgroup: Unknown subsys name 'net' [ 40.832308] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:39:22 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000001 RCX=0000000000000001 RDX=0000000000000000 RSI=000000000000000b RDI=ffff888008d7fae0 RBP=dffffc0000000000 RSP=ffff888008d7fa30 R8 =ffffffff86072abc R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000000128 R12=0000000000000007 R13=0000000000000000 R14=ffff888008d7fab0 R15=ffff88800bea31b0 RIP=ffffffff813ad5eb RFL=00000286 [--S--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=00007efefc4a10e0 CR3=000000000f170000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=17d3271c0e84089100000000000ae988 XMM05=db39b0fbdd676c8500000000001352b8 XMM06=19e9129bd510f2350000000000134400 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1003010fce RBX=ffff888018086f60 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888018087e70 RSP=ffff888018086e80 R8 =0000000000000001 R9 =0000000000000003 R10=0000000000000001 R11=ffff88801685a61c R12=ffff888018087099 R13=0000000000000001 R14=1ffff11003010fd5 R15=dffffc0000000000 RIP=ffffffff84498f50 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 00007f61e30bf900 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=00007f61e3084008 CR3=0000000019d0e000 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