syzkaller login: [ 38.673626] BUG: Bad rss-counter state mm:00000000e88e01fa type:MM_FILEPAGES val:33 [ 38.674228] BUG: Bad rss-counter state mm:00000000e88e01fa type:MM_ANONPAGES val:22 [ 38.784986] ================================================================== [ 38.785706] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.786439] Read of size 8 at addr ffff88800f23d968 by task sshd/219 [ 38.787158] [ 38.787336] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.788020] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.788783] Call Trace: [ 38.789030] [ 38.789249] dump_stack_lvl+0x91/0xf0 [ 38.789625] print_report+0xcc/0x620 [ 38.790008] ? __virt_addr_valid+0x102/0x340 [ 38.790446] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.790934] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.791412] kasan_report+0xbe/0xf0 [ 38.791783] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.792265] vma_interval_tree_remove+0xc75/0xec0 [ 38.792738] vma_prepare+0xc54/0x11a0 [ 38.793115] __split_vma+0x5af/0x950 [ 38.793481] ? __pfx___split_vma+0x10/0x10 [ 38.793899] ? find_held_lock+0x2c/0x110 [ 38.794324] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.794774] ? lock_is_held_type+0x9f/0x120 [ 38.795148] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.795489] ? mtree_range_walk+0x632/0x900 [ 38.795806] ? mas_walk+0x5c7/0x7c0 [ 38.796084] do_vmi_munmap+0x1f1/0x2b0 [ 38.796364] mmap_region+0x1f9/0x2660 [ 38.796641] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.796942] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.797352] ? __pfx_lock_acquire+0x10/0x10 [ 38.797664] ? __pfx_mmap_region+0x10/0x10 [ 38.797977] ? security_mmap_addr+0x7d/0xa0 [ 38.798289] ? get_unmapped_area+0x1f5/0x3f0 [ 38.798604] do_mmap+0x854/0xf00 [ 38.798863] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.799152] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.799468] ksys_mmap_pgoff+0x3af/0x500 [ 38.799768] do_syscall_64+0x3f/0x90 [ 38.800048] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.800420] RIP: 0033:0x7fd5813d5d82 [ 38.800688] 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 [ 38.801903] RSP: 002b:00007ffc3fc11e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.802428] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd5813d5d82 [ 38.802935] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd58080f000 [ 38.803398] RBP: 00007fd58080f000 R08: 0000000000000009 R09: 0000000000001000 [ 38.803866] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f2f3c78ec0 [ 38.804325] R13: 00007ffc3fc11e60 R14: 00007ffc3fc11e90 R15: 00007ffc3fc121f0 [ 38.804801] [ 38.804964] [ 38.805080] Allocated by task 212: [ 38.805314] kasan_save_stack+0x22/0x50 [ 38.805587] kasan_set_track+0x25/0x30 [ 38.805872] __kasan_slab_alloc+0x59/0x70 [ 38.806174] kmem_cache_alloc+0x16b/0x370 [ 38.806459] vm_area_dup+0x20/0x160 [ 38.806720] __split_vma+0x170/0x950 [ 38.806978] split_vma+0xc6/0x110 [ 38.807235] mprotect_fixup+0x8d2/0xb30 [ 38.807522] do_mprotect_pkey+0x87e/0xd40 [ 38.807837] __x64_sys_mprotect+0x78/0xc0 [ 38.808140] do_syscall_64+0x3f/0x90 [ 38.808416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.808800] [ 38.808924] Freed by task 212: [ 38.809151] kasan_save_stack+0x22/0x50 [ 38.809439] kasan_set_track+0x25/0x30 [ 38.809731] kasan_save_free_info+0x2b/0x50 [ 38.810038] __kasan_slab_free+0x10a/0x190 [ 38.810350] kmem_cache_free+0x10d/0x4d0 [ 38.810644] rcu_core+0x8c8/0x2860 [ 38.810911] __do_softirq+0x1b7/0x7d4 [ 38.811181] [ 38.811302] Last potentially related work creation: [ 38.811645] kasan_save_stack+0x22/0x50 [ 38.811944] __kasan_record_aux_stack+0x8e/0xa0 [ 38.812280] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.812650] remove_vma+0x139/0x170 [ 38.812921] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.813235] do_vmi_munmap+0x1f1/0x2b0 [ 38.813507] __vm_munmap+0x138/0x3a0 [ 38.813785] __x64_sys_munmap+0x59/0x80 [ 38.814077] do_syscall_64+0x3f/0x90 [ 38.814351] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.814724] [ 38.814849] The buggy address belongs to the object at ffff88800f23d910 [ 38.814849] which belongs to the cache vm_area_struct of size 168 [ 38.815702] The buggy address is located 88 bytes inside of [ 38.815702] freed 168-byte region [ffff88800f23d910, ffff88800f23d9b8) [ 38.816503] [ 38.816623] The buggy address belongs to the physical page: [ 38.817009] page:0000000009373336 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf23d [ 38.817644] memcg:ffff88800e09d101 [ 38.817893] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.818287] page_type: 0xffffffff() [ 38.818549] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.819083] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e09d101 [ 38.819605] page dumped because: kasan: bad access detected [ 38.819992] [ 38.820115] Memory state around the buggy address: [ 38.820451] ffff88800f23d800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.820957] ffff88800f23d880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.821453] >ffff88800f23d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.821938] ^ [ 38.822404] ffff88800f23d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.822908] ffff88800f23da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.823396] ================================================================== [ 38.823978] Disabling lock debugging due to kernel taint [ 40.227110] BUG: Bad rss-counter state mm:00000000d02eb449 type:MM_FILEPAGES val:33 [ 40.227676] BUG: Bad rss-counter state mm:00000000d02eb449 type:MM_ANONPAGES val:22 [ 40.573385] BUG: Bad rss-counter state mm:00000000f095f3d6 type:MM_FILEPAGES val:33 [ 40.573979] BUG: Bad rss-counter state mm:00000000f095f3d6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27410' (ECDSA) to the list of known hosts. 2023/06/21 02:51:58 fuzzer started 2023/06/21 02:51:58 dialing manager at localhost:36067 2023/06/21 02:51:58 checking machine... 2023/06/21 02:51:58 checking revisions... [ 41.244547] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:51:59 testing simple program... [ 41.286914] cgroup: Unknown subsys name 'net' [ 41.326630] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:51:58 Registers: info registers vcpu 0 RAX=ffff88801c9dfa48 RBX=ffff88801c9dfad8 RCX=ffff88801c9e0000 RDX=0000000000000001 RSI=ffff88801c9dfa50 RDI=ffff88801c9df9f0 RBP=ffff888015ebb680 RSP=ffff88801c9df9f0 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88801c9dfa40 R11=00000000000b6a61 R12=ffff88801c9dfa60 R13=ffff88801c9dfa68 R14=ffff88801c9dfa88 R15=ffff88801c9dfa40 RIP=ffffffff81132f53 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 00007fe197196900 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=00007fe19774e0b0 CR3=0000000009a90000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=0000000000000002 RDX=1ffff1100d9e1357 RSI=ffff88806cf09e00 RDI=ffff88806cf09ac0 RBP=ffff88806cf09e58 RSP=ffff88806cf09a00 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000000fc0c R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88806cf09e00 R15=ffff88806cf09a70 RIP=ffffffff81131c60 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 00007f95aabe5900 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=00007f95a9fdf820 CR3=000000000d792000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=7c831eca2efa9b9a00000000000ae988 XMM05=42e44af90c681ccc0000000000132a58 XMM06=806171799158d96700000000001314d8 XMM07=fb795ef6d65770560000000000121ad0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000