syzkaller login: [ 30.554260] BUG: Bad rss-counter state mm:0000000088af6239 type:MM_FILEPAGES val:33 [ 30.555296] BUG: Bad rss-counter state mm:0000000088af6239 type:MM_ANONPAGES val:22 [ 30.725404] ================================================================== [ 30.726093] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.726772] Read of size 8 at addr ffff8880145edc20 by task sshd/220 [ 30.727314] [ 30.727473] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.728085] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.728774] Call Trace: [ 30.728999] [ 30.729200] dump_stack_lvl+0x91/0xf0 [ 30.729774] print_report+0xcc/0x620 [ 30.730114] ? __virt_addr_valid+0x102/0x340 [ 30.730531] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.730969] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.731405] kasan_report+0xbe/0xf0 [ 30.731768] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.732212] vma_interval_tree_remove+0xc75/0xec0 [ 30.732644] vma_prepare+0xc54/0x11a0 [ 30.732991] __split_vma+0x5af/0x950 [ 30.733325] ? __pfx___split_vma+0x10/0x10 [ 30.733702] ? find_held_lock+0x2c/0x110 [ 30.734072] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.734495] ? lock_is_held_type+0x9f/0x120 [ 30.734885] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.735334] ? mtree_range_walk+0x632/0x900 [ 30.735731] ? mas_walk+0x5c7/0x7c0 [ 30.736075] do_vmi_munmap+0x1f1/0x2b0 [ 30.736436] mmap_region+0x1f9/0x2660 [ 30.736790] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.737164] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.737682] ? __pfx_lock_acquire+0x10/0x10 [ 30.738067] ? __pfx_mmap_region+0x10/0x10 [ 30.738579] ? security_mmap_addr+0x7d/0xa0 [ 30.739258] ? get_unmapped_area+0x1f5/0x3f0 [ 30.739956] do_mmap+0x854/0xf00 [ 30.740514] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.741137] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.741848] ksys_mmap_pgoff+0x3af/0x500 [ 30.742518] do_syscall_64+0x3f/0x90 [ 30.743091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.743865] RIP: 0033:0x7fd2ea282d82 [ 30.744409] 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 [ 30.746966] RSP: 002b:00007ffc2fe0dc08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.748109] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd2ea282d82 [ 30.749135] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd2e96bc000 [ 30.750139] RBP: 00007fd2e96bc000 R08: 0000000000000009 R09: 0000000000001000 [ 30.751156] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ecb3097ec0 [ 30.752054] R13: 00007ffc2fe0dc20 R14: 00007ffc2fe0dc50 R15: 00007ffc2fe0dfb0 [ 30.752952] [ 30.753262] [ 30.753492] Allocated by task 213: [ 30.753940] kasan_save_stack+0x22/0x50 [ 30.754487] kasan_set_track+0x25/0x30 [ 30.755003] __kasan_slab_alloc+0x59/0x70 [ 30.755561] kmem_cache_alloc+0x16b/0x370 [ 30.756110] vm_area_dup+0x20/0x160 [ 30.756592] __split_vma+0x170/0x950 [ 30.757082] split_vma+0xc6/0x110 [ 30.757546] mprotect_fixup+0x8d2/0xb30 [ 30.758077] do_mprotect_pkey+0x87e/0xd40 [ 30.758629] __x64_sys_mprotect+0x78/0xc0 [ 30.759180] do_syscall_64+0x3f/0x90 [ 30.759687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.760365] [ 30.760592] Freed by task 203: [ 30.761005] kasan_save_stack+0x22/0x50 [ 30.761538] kasan_set_track+0x25/0x30 [ 30.762056] kasan_save_free_info+0x2b/0x50 [ 30.762635] __kasan_slab_free+0x10a/0x190 [ 30.763202] kmem_cache_free+0x10d/0x4d0 [ 30.763740] rcu_core+0x8c8/0x2860 [ 30.764207] __do_softirq+0x1b7/0x7d4 [ 30.764717] [ 30.764943] Last potentially related work creation: [ 30.765556] kasan_save_stack+0x22/0x50 [ 30.766088] __kasan_record_aux_stack+0x8e/0xa0 [ 30.766706] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.767393] remove_vma+0x139/0x170 [ 30.767869] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.768460] do_vmi_munmap+0x1f1/0x2b0 [ 30.768975] __vm_munmap+0x138/0x3a0 [ 30.769471] __x64_sys_munmap+0x59/0x80 [ 30.769998] do_syscall_64+0x3f/0x90 [ 30.770516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.771279] [ 30.771510] The buggy address belongs to the object at ffff8880145edbc8 [ 30.771510] which belongs to the cache vm_area_struct of size 168 [ 30.773064] The buggy address is located 88 bytes inside of [ 30.773064] freed 168-byte region [ffff8880145edbc8, ffff8880145edc70) [ 30.774563] [ 30.774789] The buggy address belongs to the physical page: [ 30.775487] page:00000000be92a5ce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145ed [ 30.776629] memcg:ffff88800f568f01 [ 30.777079] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.777768] page_type: 0xffffffff() [ 30.778238] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.779215] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f568f01 [ 30.780169] page dumped because: kasan: bad access detected [ 30.780865] [ 30.781094] Memory state around the buggy address: [ 30.781711] ffff8880145edb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.782637] ffff8880145edb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.783541] >ffff8880145edc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.784445] ^ [ 30.785009] ffff8880145edc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.785907] ffff8880145edd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.786809] ================================================================== [ 30.788053] Disabling lock debugging due to kernel taint [ 32.309152] BUG: Bad rss-counter state mm:00000000238b3d46 type:MM_FILEPAGES val:33 [ 32.310138] BUG: Bad rss-counter state mm:00000000238b3d46 type:MM_ANONPAGES val:22 [ 32.682540] BUG: Bad rss-counter state mm:00000000e2117e8d type:MM_FILEPAGES val:33 [ 32.683610] BUG: Bad rss-counter state mm:00000000e2117e8d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41489' (ECDSA) to the list of known hosts. 2023/06/20 16:35:50 fuzzer started 2023/06/20 16:35:50 dialing manager at localhost:36067 2023/06/20 16:35:50 checking machine... 2023/06/20 16:35:50 checking revisions... [ 33.441075] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:35:51 testing simple program... [ 33.485883] cgroup: Unknown subsys name 'net' [ 33.541331] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:35:50 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f7c93f7a180 CR3=0000000015d44000 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=35333a3631203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732030353a3533 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343836 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1001fcaf8f RBX=1ffff11001fcafac RCX=0000000000000000 RDX=ffff888018d19b40 RSI=ffffffff817193c1 RDI=ffff888009561f78 RBP=1ffff11001fcaf8f RSP=ffff88800fe57c68 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888009561f78 R13=ffffffff817193c1 R14=0000000000000000 R15=8000000017421067 RIP=ffffffff812d86b0 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f10b51dd900 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=00007ffc2728acec CR3=0000000008eb4000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=000000000000000000000000000000ff XMM04=c7ebb54c3c80a5e96697eea68a9e6c46 XMM05=000000000000000000000000000000ff XMM06=575e9b4c0561a50c6697b7698a9e3800 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000