syzkaller login: [ 38.730989] BUG: Bad rss-counter state mm:00000000f6d2c3b3 type:MM_FILEPAGES val:33 [ 38.732998] BUG: Bad rss-counter state mm:00000000f6d2c3b3 type:MM_ANONPAGES val:22 [ 38.896166] ================================================================== [ 38.897251] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.898371] Read of size 8 at addr ffff88800e94c968 by task sshd/220 [ 38.899432] [ 38.899705] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.900734] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.901904] Call Trace: [ 38.902249] [ 38.902540] dump_stack_lvl+0x91/0xf0 [ 38.903041] print_report+0xcc/0x620 [ 38.903530] ? __virt_addr_valid+0x102/0x340 [ 38.904076] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.904687] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.905295] kasan_report+0xbe/0xf0 [ 38.905771] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.906376] vma_interval_tree_remove+0xc75/0xec0 [ 38.906978] vma_prepare+0xc54/0x11a0 [ 38.907453] __split_vma+0x5af/0x950 [ 38.907935] ? __pfx___split_vma+0x10/0x10 [ 38.908459] ? find_held_lock+0x2c/0x110 [ 38.908977] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.909544] ? lock_is_held_type+0x9f/0x120 [ 38.910085] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.910686] ? mtree_range_walk+0x632/0x900 [ 38.911230] ? mas_walk+0x5c7/0x7c0 [ 38.911732] do_vmi_munmap+0x1f1/0x2b0 [ 38.912224] mmap_region+0x1f9/0x2660 [ 38.912706] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.913213] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.913929] ? __pfx_lock_acquire+0x10/0x10 [ 38.914457] ? __pfx_mmap_region+0x10/0x10 [ 38.914991] ? security_mmap_addr+0x7d/0xa0 [ 38.915530] ? get_unmapped_area+0x1f5/0x3f0 [ 38.916082] do_mmap+0x854/0xf00 [ 38.916516] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.917014] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.917573] ksys_mmap_pgoff+0x3af/0x500 [ 38.918078] do_syscall_64+0x3f/0x90 [ 38.918557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.919204] RIP: 0033:0x7efc2e6a7d82 [ 38.919677] 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 [ 38.921804] RSP: 002b:00007ffd099b7e08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.922721] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efc2e6a7d82 [ 38.923564] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efc2dae1000 [ 38.924427] RBP: 00007efc2dae1000 R08: 0000000000000009 R09: 0000000000001000 [ 38.925270] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bf85aa6ec0 [ 38.926140] R13: 00007ffd099b7e20 R14: 00007ffd099b7e50 R15: 00007ffd099b81b0 [ 38.927010] [ 38.927321] [ 38.927547] Allocated by task 213: [ 38.927977] kasan_save_stack+0x22/0x50 [ 38.928476] kasan_set_track+0x25/0x30 [ 38.928969] __kasan_slab_alloc+0x59/0x70 [ 38.929494] kmem_cache_alloc+0x16b/0x370 [ 38.930012] vm_area_dup+0x20/0x160 [ 38.930466] __split_vma+0x170/0x950 [ 38.930927] split_vma+0xc6/0x110 [ 38.931370] mprotect_fixup+0x8d2/0xb30 [ 38.931895] do_mprotect_pkey+0x87e/0xd40 [ 38.932457] __x64_sys_mprotect+0x78/0xc0 [ 38.932968] do_syscall_64+0x3f/0x90 [ 38.933448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.934088] [ 38.934301] Freed by task 204: [ 38.934696] kasan_save_stack+0x22/0x50 [ 38.935196] kasan_set_track+0x25/0x30 [ 38.935696] kasan_save_free_info+0x2b/0x50 [ 38.936217] __kasan_slab_free+0x10a/0x190 [ 38.936743] kmem_cache_free+0x10d/0x4d0 [ 38.937243] rcu_core+0x8c8/0x2860 [ 38.937683] __do_softirq+0x1b7/0x7d4 [ 38.938154] [ 38.938374] Last potentially related work creation: [ 38.938954] kasan_save_stack+0x22/0x50 [ 38.939448] __kasan_record_aux_stack+0x8e/0xa0 [ 38.940047] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.940718] remove_vma+0x139/0x170 [ 38.941177] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.941735] do_vmi_munmap+0x1f1/0x2b0 [ 38.942221] __vm_munmap+0x138/0x3a0 [ 38.942687] __x64_sys_munmap+0x59/0x80 [ 38.943179] do_syscall_64+0x3f/0x90 [ 38.943664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.944306] [ 38.944522] The buggy address belongs to the object at ffff88800e94c910 [ 38.944522] which belongs to the cache vm_area_struct of size 168 [ 38.945979] The buggy address is located 88 bytes inside of [ 38.945979] freed 168-byte region [ffff88800e94c910, ffff88800e94c9b8) [ 38.947384] [ 38.947615] The buggy address belongs to the physical page: [ 38.948268] page:00000000d2c46f38 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe94c [ 38.949343] memcg:ffff88800dbb7701 [ 38.949774] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.950422] page_type: 0xffffffff() [ 38.950871] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.951808] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbb7701 [ 38.952714] page dumped because: kasan: bad access detected [ 38.953371] [ 38.953589] Memory state around the buggy address: [ 38.954157] ffff88800e94c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.955008] ffff88800e94c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.955873] >ffff88800e94c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.956727] ^ [ 38.957500] ffff88800e94c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.958346] ffff88800e94ca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.959184] ================================================================== [ 38.960428] Disabling lock debugging due to kernel taint [ 41.117533] BUG: Bad rss-counter state mm:00000000d12569d6 type:MM_FILEPAGES val:33 [ 41.118607] BUG: Bad rss-counter state mm:00000000d12569d6 type:MM_ANONPAGES val:22 [ 41.594047] BUG: Bad rss-counter state mm:000000006eb9aa4b type:MM_FILEPAGES val:33 [ 41.595640] BUG: Bad rss-counter state mm:000000006eb9aa4b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59470' (ECDSA) to the list of known hosts. 2023/06/20 23:05:54 fuzzer started 2023/06/20 23:05:54 dialing manager at localhost:36067 2023/06/20 23:05:54 checking machine... 2023/06/20 23:05:54 checking revisions... [ 42.381642] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:05:54 testing simple program... [ 42.440479] cgroup: Unknown subsys name 'net' [ 42.500736] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:05:54 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff86139701 RDX=1ffff110011b3f3a RSI=ffffffff8180ca5a RDI=ffff888008d9fa40 RBP=ffff888008d9fa10 RSP=ffff888008d9f970 R8 =ffffffff86139748 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000020f03 R12=ffff888008d9fa40 R13=0000000000000000 R14=ffff888008d90000 R15=ffff8880094178d0 RIP=ffffffff813ad47e 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=00007ffc093c0278 CR3=0000000013aa8000 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=2033353a35303a3332203032206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a323836363320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a35303a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11002d74213 RBX=ffff888016ba1068 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888016ba1098 RBP=ffff888018d585c0 RSP=ffff888008e37c98 R8 =0000000000000001 R9 =ffffed10011c6f87 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888018d585c0 R14=ffffffff818d9c06 R15=ffff88800f05a400 RIP=ffffffff818464ec RFL=00000046 [---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 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=00007eff7bcdd01c CR3=0000000019e9e000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000