syzkaller login: [ 63.932075] BUG: Bad rss-counter state mm:00000000af530ce5 type:MM_FILEPAGES val:33 [ 63.933064] BUG: Bad rss-counter state mm:00000000af530ce5 type:MM_ANONPAGES val:22 [ 64.096703] ================================================================== [ 64.097772] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 64.098875] Read of size 8 at addr ffff88800e5e0c20 by task sshd/219 [ 64.099861] [ 64.100077] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 64.101107] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 64.102080] Call Trace: [ 64.102396] [ 64.102678] dump_stack_lvl+0x91/0xf0 [ 64.103175] print_report+0xcc/0x620 [ 64.103651] ? __virt_addr_valid+0x102/0x340 [ 64.104197] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.104816] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.105424] kasan_report+0xbe/0xf0 [ 64.105894] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.106520] vma_interval_tree_remove+0xc75/0xec0 [ 64.107123] vma_prepare+0xc54/0x11a0 [ 64.107598] __split_vma+0x5af/0x950 [ 64.108072] ? __pfx___split_vma+0x10/0x10 [ 64.108592] ? find_held_lock+0x2c/0x110 [ 64.109109] do_vmi_align_munmap+0x2ba/0x11f0 [ 64.109678] ? lock_is_held_type+0x9f/0x120 [ 64.110208] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 64.110810] ? mtree_range_walk+0x632/0x900 [ 64.111380] ? mas_walk+0x5c7/0x7c0 [ 64.111850] do_vmi_munmap+0x1f1/0x2b0 [ 64.112340] mmap_region+0x1f9/0x2660 [ 64.112816] ? vm_mmap_pgoff+0x15c/0x3a0 [ 64.113322] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 64.114032] ? __pfx_lock_acquire+0x10/0x10 [ 64.114564] ? __pfx_mmap_region+0x10/0x10 [ 64.115097] ? security_mmap_addr+0x7d/0xa0 [ 64.115646] ? get_unmapped_area+0x1f5/0x3f0 [ 64.116194] do_mmap+0x854/0xf00 [ 64.116632] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.117130] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 64.117712] ksys_mmap_pgoff+0x3af/0x500 [ 64.118239] do_syscall_64+0x3f/0x90 [ 64.118722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.119387] RIP: 0033:0x7f3db18c4d82 [ 64.119850] 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 [ 64.122014] RSP: 002b:00007ffcda90e658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 64.122921] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3db18c4d82 [ 64.123825] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3db0cfe000 [ 64.124715] RBP: 00007f3db0cfe000 R08: 0000000000000009 R09: 0000000000001000 [ 64.125618] R10: 0000000000000812 R11: 0000000000000206 R12: 000056059ab7dd90 [ 64.126504] R13: 00007ffcda90e670 R14: 00007ffcda90e6a0 R15: 00007ffcda90ea00 [ 64.127401] [ 64.127705] [ 64.127934] Allocated by task 212: [ 64.128382] kasan_save_stack+0x22/0x50 [ 64.128900] kasan_set_track+0x25/0x30 [ 64.129413] __kasan_slab_alloc+0x59/0x70 [ 64.129952] kmem_cache_alloc+0x16b/0x370 [ 64.130483] vm_area_dup+0x20/0x160 [ 64.130969] __split_vma+0x170/0x950 [ 64.131458] split_vma+0xc6/0x110 [ 64.131912] mprotect_fixup+0x8d2/0xb30 [ 64.132438] do_mprotect_pkey+0x87e/0xd40 [ 64.132979] __x64_sys_mprotect+0x78/0xc0 [ 64.133515] do_syscall_64+0x3f/0x90 [ 64.134003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.134667] [ 64.134890] Freed by task 212: [ 64.135303] kasan_save_stack+0x22/0x50 [ 64.135826] kasan_set_track+0x25/0x30 [ 64.136340] kasan_save_free_info+0x2b/0x50 [ 64.136890] __kasan_slab_free+0x10a/0x190 [ 64.137443] kmem_cache_free+0x10d/0x4d0 [ 64.137972] rcu_core+0x8c8/0x2860 [ 64.138433] __do_softirq+0x1b7/0x7d4 [ 64.138928] [ 64.139166] Last potentially related work creation: [ 64.139772] kasan_save_stack+0x22/0x50 [ 64.140291] __kasan_record_aux_stack+0x8e/0xa0 [ 64.140952] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.141623] remove_vma+0x139/0x170 [ 64.142088] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.142661] do_vmi_munmap+0x1f1/0x2b0 [ 64.143168] __vm_munmap+0x138/0x3a0 [ 64.143652] __x64_sys_munmap+0x59/0x80 [ 64.144164] do_syscall_64+0x3f/0x90 [ 64.144654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.145313] [ 64.145541] Second to last potentially related work creation: [ 64.146245] kasan_save_stack+0x22/0x50 [ 64.146767] __kasan_record_aux_stack+0x8e/0xa0 [ 64.147369] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.148033] remove_vma+0x139/0x170 [ 64.148499] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.149078] do_vmi_munmap+0x1f1/0x2b0 [ 64.149591] mmap_region+0x1f9/0x2660 [ 64.150083] do_mmap+0x854/0xf00 [ 64.150532] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.151055] ksys_mmap_pgoff+0x3af/0x500 [ 64.151577] do_syscall_64+0x3f/0x90 [ 64.152069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.152735] [ 64.152955] The buggy address belongs to the object at ffff88800e5e0bc8 [ 64.152955] which belongs to the cache vm_area_struct of size 168 [ 64.154485] The buggy address is located 88 bytes inside of [ 64.154485] freed 168-byte region [ffff88800e5e0bc8, ffff88800e5e0c70) [ 64.155968] [ 64.156194] The buggy address belongs to the physical page: [ 64.156884] page:00000000b33722f4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5e0 [ 64.158007] memcg:ffff888019b5f101 [ 64.158454] flags: 0x100000000000200(slab|node=0|zone=1) [ 64.159144] page_type: 0xffffffff() [ 64.159612] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 64.160567] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019b5f101 [ 64.161508] page dumped because: kasan: bad access detected [ 64.162189] [ 64.162409] Memory state around the buggy address: [ 64.163029] ffff88800e5e0b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 64.163923] ffff88800e5e0b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 64.164824] >ffff88800e5e0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 64.165714] ^ [ 64.166265] ffff88800e5e0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 64.167165] ffff88800e5e0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 64.168054] ================================================================== [ 64.169018] Disabling lock debugging due to kernel taint [ 66.381239] BUG: Bad rss-counter state mm:0000000083b22f55 type:MM_FILEPAGES val:33 [ 66.382164] BUG: Bad rss-counter state mm:0000000083b22f55 type:MM_ANONPAGES val:22 [ 66.954569] BUG: Bad rss-counter state mm:00000000b1b8ff38 type:MM_FILEPAGES val:33 [ 66.955761] BUG: Bad rss-counter state mm:00000000b1b8ff38 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4407' (ECDSA) to the list of known hosts. 2023/06/19 15:36:22 fuzzer started 2023/06/19 15:36:23 dialing manager at localhost:44161 2023/06/19 15:36:23 checking machine... 2023/06/19 15:36:23 checking revisions... [ 67.577338] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:36:23 testing simple program... [ 67.632855] cgroup: Unknown subsys name 'net' [ 67.698381] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:35:49 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c1354 RSI=ffff888013e8f5d0 RDI=ffff88806ce09aa0 RBP=ffff888013e8f5d0 RSP=ffff88806ce099f0 R8 =ffffffff8613751e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=0000000000000008 R13=ffff88806ce09ae0 R14=ffff888013e8f5d8 R15=ffff88806ce09a98 RIP=ffffffff81130445 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 00007f8d762a4900 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=00007f8d7576f000 CR3=0000000013724000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=1e55f282acd3997900000000000ae988 XMM05=174ce5f1f8f69eb6000000000013ea80 XMM06=084009a618d3dfd2000000000013d820 XMM07=fb795ef6d6577056000000000012cc08 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800e6098b8 RCX=ffffffff812e00e5 RDX=1ffff11001cc13d5 RSI=ffffffff87b86f80 RDI=ffff88800e6098c8 RBP=ffff88800e6098b8 RSP=ffff888008e57c98 R8 =0000000000000001 R9 =ffffed10011caf8b R10=0000000000000003 R11=0000000000000128 R12=ffff88800e6098b9 R13=ffff888010227ea8 R14=ffff88800e609ea8 R15=ffffffff87b86f80 RIP=ffffffff844cc8bc 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=00007f2530412618 CR3=0000000016d94000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000