syzkaller login: [ 30.843687] BUG: Bad rss-counter state mm:000000000aa08160 type:MM_FILEPAGES val:33 [ 30.844860] BUG: Bad rss-counter state mm:000000000aa08160 type:MM_ANONPAGES val:22 [ 30.869021] ================================================================== [ 30.869551] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.870106] Read of size 8 at addr ffff8880158d83f8 by task sshd/219 [ 30.870672] [ 30.870794] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.871270] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.871818] Call Trace: [ 30.871997] [ 30.872157] dump_stack_lvl+0x91/0xf0 [ 30.872435] print_report+0xcc/0x620 [ 30.872707] ? __virt_addr_valid+0x102/0x340 [ 30.873013] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.873364] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.873712] kasan_report+0xbe/0xf0 [ 30.873979] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.874323] vma_interval_tree_remove+0xc75/0xec0 [ 30.874660] vma_prepare+0xc54/0x11a0 [ 30.875055] __split_vma+0x5af/0x950 [ 30.875317] ? __pfx___split_vma+0x10/0x10 [ 30.875612] ? find_held_lock+0x2c/0x110 [ 30.875906] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.876215] ? lock_is_held_type+0x9f/0x120 [ 30.876510] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.876840] ? mtree_range_walk+0x632/0x900 [ 30.877163] ? mas_walk+0x5c7/0x7c0 [ 30.877423] do_vmi_munmap+0x1f1/0x2b0 [ 30.877703] mmap_region+0x1f9/0x2660 [ 30.877968] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.878250] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.878643] ? __pfx_lock_acquire+0x10/0x10 [ 30.878930] ? __pfx_mmap_region+0x10/0x10 [ 30.879225] ? security_mmap_addr+0x7d/0xa0 [ 30.879523] ? get_unmapped_area+0x1f5/0x3f0 [ 30.879830] do_mmap+0x854/0xf00 [ 30.880074] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.880347] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.880661] ksys_mmap_pgoff+0x3af/0x500 [ 30.880938] do_syscall_64+0x3f/0x90 [ 30.881202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.881577] RIP: 0033:0x7fc08747fd82 [ 30.881827] 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 [ 30.882993] RSP: 002b:00007fff04802ee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.883491] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc08747fd82 [ 30.883954] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc0868b9000 [ 30.884418] RBP: 00007fc0868b9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.884878] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e573574ec0 [ 30.885350] R13: 00007fff04802f00 R14: 00007fff04802f30 R15: 00007fff04803290 [ 30.885822] [ 30.885991] [ 30.886119] Allocated by task 212: [ 30.886371] kasan_save_stack+0x22/0x50 [ 30.886679] kasan_set_track+0x25/0x30 [ 30.886973] __kasan_slab_alloc+0x59/0x70 [ 30.887292] kmem_cache_alloc+0x16b/0x370 [ 30.887607] vm_area_dup+0x20/0x160 [ 30.887891] __split_vma+0x170/0x950 [ 30.888164] split_vma+0xc6/0x110 [ 30.888416] mprotect_fixup+0x8d2/0xb30 [ 30.888718] do_mprotect_pkey+0x87e/0xd40 [ 30.889022] __x64_sys_mprotect+0x78/0xc0 [ 30.889346] do_syscall_64+0x3f/0x90 [ 30.889621] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.889995] [ 30.890122] Freed by task 212: [ 30.890357] kasan_save_stack+0x22/0x50 [ 30.890659] kasan_set_track+0x25/0x30 [ 30.890944] kasan_save_free_info+0x2b/0x50 [ 30.891256] __kasan_slab_free+0x10a/0x190 [ 30.891574] kmem_cache_free+0x10d/0x4d0 [ 30.891870] rcu_core+0x8c8/0x2860 [ 30.892134] __do_softirq+0x1b7/0x7d4 [ 30.892419] [ 30.892546] Last potentially related work creation: [ 30.892897] kasan_save_stack+0x22/0x50 [ 30.893194] __kasan_record_aux_stack+0x8e/0xa0 [ 30.893548] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.893932] remove_vma+0x139/0x170 [ 30.894198] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.894539] do_vmi_munmap+0x1f1/0x2b0 [ 30.894819] __vm_munmap+0x138/0x3a0 [ 30.895098] __x64_sys_munmap+0x59/0x80 [ 30.895394] do_syscall_64+0x3f/0x90 [ 30.895676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.896065] [ 30.896189] The buggy address belongs to the object at ffff8880158d83a0 [ 30.896189] which belongs to the cache vm_area_struct of size 168 [ 30.897065] The buggy address is located 88 bytes inside of [ 30.897065] freed 168-byte region [ffff8880158d83a0, ffff8880158d8448) [ 30.897912] [ 30.898037] The buggy address belongs to the physical page: [ 30.898430] page:0000000043ab96ed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x158d8 [ 30.899089] memcg:ffff88800e52e501 [ 30.899341] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.899723] page_type: 0xffffffff() [ 30.899989] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.900539] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e52e501 [ 30.901076] page dumped because: kasan: bad access detected [ 30.901487] [ 30.901615] Memory state around the buggy address: [ 30.901958] ffff8880158d8280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.902476] ffff8880158d8300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.902991] >ffff8880158d8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.903507] ^ [ 30.904020] ffff8880158d8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.904530] ffff8880158d8480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.905045] ================================================================== [ 30.905773] Disabling lock debugging due to kernel taint [ 33.167773] BUG: Bad rss-counter state mm:0000000041fedeae type:MM_FILEPAGES val:33 [ 33.168946] BUG: Bad rss-counter state mm:0000000041fedeae type:MM_ANONPAGES val:22 [ 33.728049] BUG: Bad rss-counter state mm:000000001f3f6011 type:MM_FILEPAGES val:33 [ 33.729055] BUG: Bad rss-counter state mm:000000001f3f6011 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62578' (ECDSA) to the list of known hosts. 2023/06/20 16:06:26 fuzzer started 2023/06/20 16:06:27 dialing manager at localhost:36067 2023/06/20 16:06:27 checking machine... 2023/06/20 16:06:27 checking revisions... [ 34.365011] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:06:27 testing simple program... [ 34.416124] cgroup: Unknown subsys name 'net' [ 34.470746] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:06:26 Registers: info registers vcpu 0 RAX=ffffffff86621e3b RBX=ffffffff8605790c RCX=ffffffff86621197 RDX=0000000000000000 RSI=ffffffff86073d08 RDI=ffffffff85d7a9c4 RBP=ffffffff86056148 RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffffffff860590d4 R13=ffffffff85d7a9c4 R14=ffffffff86056144 R15=dffffc0000000000 RIP=ffffffff8112fc99 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 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=00007ffdb3b112a8 CR3=0000000016e10000 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=2036323a36303a3631203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a36303a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000008000 RCX=00007f3dfba7b477 RDX=0000000000000001 RSI=0000000000000002 RDI=0000000000000008 RBP=000055a07296d990 RSP=00007ffc9e7637f8 R8 =000055a0729764f0 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000206 R12=0000000000000008 R13=000055a07296d990 R14=0000000000000005 R15=000055a0729764f0 RIP=00007f3dfba6b330 RFL=00000246 [---Z-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 00007f3dfb588900 00000000 00000000 GS =0000 0000000000000000 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=00007f3dfbb400b0 CR3=000000000979e000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000