syzkaller login: [ 39.709078] BUG: Bad rss-counter state mm:00000000e458ed65 type:MM_FILEPAGES val:33 [ 39.710493] BUG: Bad rss-counter state mm:00000000e458ed65 type:MM_ANONPAGES val:22 [ 39.743842] ================================================================== [ 39.744872] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.745818] Read of size 8 at addr ffff888010354c20 by task sshd/219 [ 39.746586] [ 39.746846] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.747856] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.749031] Call Trace: [ 39.749389] [ 39.749727] dump_stack_lvl+0x91/0xf0 [ 39.750324] print_report+0xcc/0x620 [ 39.750912] ? __virt_addr_valid+0x102/0x340 [ 39.751558] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.752272] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.752909] kasan_report+0xbe/0xf0 [ 39.753389] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.754139] vma_interval_tree_remove+0xc75/0xec0 [ 39.754778] vma_prepare+0xc54/0x11a0 [ 39.755269] __split_vma+0x5af/0x950 [ 39.755741] ? __pfx___split_vma+0x10/0x10 [ 39.756266] ? find_held_lock+0x2c/0x110 [ 39.756797] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.757513] ? lock_is_held_type+0x9f/0x120 [ 39.758061] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.758716] ? mtree_range_walk+0x632/0x900 [ 39.759413] ? mas_walk+0x5c7/0x7c0 [ 39.759945] do_vmi_munmap+0x1f1/0x2b0 [ 39.760443] mmap_region+0x1f9/0x2660 [ 39.761019] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.761634] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.762535] ? __pfx_lock_acquire+0x10/0x10 [ 39.763160] ? __pfx_mmap_region+0x10/0x10 [ 39.763705] ? security_mmap_addr+0x7d/0xa0 [ 39.764235] ? get_unmapped_area+0x1f5/0x3f0 [ 39.764814] do_mmap+0x854/0xf00 [ 39.765266] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.765768] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.766346] ksys_mmap_pgoff+0x3af/0x500 [ 39.766859] do_syscall_64+0x3f/0x90 [ 39.767340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.767999] RIP: 0033:0x7fa5d37a7d82 [ 39.768464] 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 [ 39.770613] RSP: 002b:00007ffe4b53a6f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.771524] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa5d37a7d82 [ 39.772560] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa5d2be1000 [ 39.773439] RBP: 00007fa5d2be1000 R08: 0000000000000009 R09: 0000000000001000 [ 39.774294] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c90f8fbec0 [ 39.775133] R13: 00007ffe4b53a710 R14: 00007ffe4b53a740 R15: 00007ffe4b53aaa0 [ 39.775991] [ 39.776281] [ 39.776500] Allocated by task 212: [ 39.776951] kasan_save_stack+0x22/0x50 [ 39.777465] kasan_set_track+0x25/0x30 [ 39.777963] __kasan_slab_alloc+0x59/0x70 [ 39.778493] kmem_cache_alloc+0x16b/0x370 [ 39.779021] vm_area_dup+0x20/0x160 [ 39.779484] __split_vma+0x170/0x950 [ 39.779966] split_vma+0xc6/0x110 [ 39.780418] mprotect_fixup+0x8d2/0xb30 [ 39.780933] do_mprotect_pkey+0x87e/0xd40 [ 39.781463] __x64_sys_mprotect+0x78/0xc0 [ 39.781990] do_syscall_64+0x3f/0x90 [ 39.782469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.783129] [ 39.783348] Freed by task 203: [ 39.783747] kasan_save_stack+0x22/0x50 [ 39.784267] kasan_set_track+0x25/0x30 [ 39.784789] kasan_save_free_info+0x2b/0x50 [ 39.785335] __kasan_slab_free+0x10a/0x190 [ 39.785875] kmem_cache_free+0x10d/0x4d0 [ 39.786383] rcu_core+0x8c8/0x2860 [ 39.786829] __do_softirq+0x1b7/0x7d4 [ 39.787310] [ 39.787525] Last potentially related work creation: [ 39.788118] kasan_save_stack+0x22/0x50 [ 39.788626] __kasan_record_aux_stack+0x8e/0xa0 [ 39.789227] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.789876] remove_vma+0x139/0x170 [ 39.790332] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.790890] do_vmi_munmap+0x1f1/0x2b0 [ 39.791377] __vm_munmap+0x138/0x3a0 [ 39.791846] __x64_sys_munmap+0x59/0x80 [ 39.792343] do_syscall_64+0x3f/0x90 [ 39.792830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.793475] [ 39.793693] Second to last potentially related work creation: [ 39.794379] kasan_save_stack+0x22/0x50 [ 39.794892] __kasan_record_aux_stack+0x8e/0xa0 [ 39.795475] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.796120] remove_vma+0x139/0x170 [ 39.796573] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.797144] do_vmi_munmap+0x1f1/0x2b0 [ 39.797633] mmap_region+0x1f9/0x2660 [ 39.798118] do_mmap+0x854/0xf00 [ 39.798552] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.799041] ksys_mmap_pgoff+0x3af/0x500 [ 39.799543] do_syscall_64+0x3f/0x90 [ 39.800017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.800687] [ 39.800904] The buggy address belongs to the object at ffff888010354bc8 [ 39.800904] which belongs to the cache vm_area_struct of size 168 [ 39.802417] The buggy address is located 88 bytes inside of [ 39.802417] freed 168-byte region [ffff888010354bc8, ffff888010354c70) [ 39.803851] [ 39.804068] The buggy address belongs to the physical page: [ 39.804736] page:00000000f70bfc5c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10354 [ 39.805848] memcg:ffff88800de2eb01 [ 39.806279] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.806928] page_type: 0xffffffff() [ 39.807388] raw: 0100000000000200 ffff88800879fc80 ffffea0000599f40 dead000000000002 [ 39.808318] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de2eb01 [ 39.809276] page dumped because: kasan: bad access detected [ 39.809935] [ 39.810155] Memory state around the buggy address: [ 39.810733] ffff888010354b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.811603] ffff888010354b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.812461] >ffff888010354c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.813336] ^ [ 39.813864] ffff888010354c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.814791] ffff888010354d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.815651] ================================================================== [ 39.816692] Disabling lock debugging due to kernel taint [ 41.778652] BUG: Bad rss-counter state mm:000000000cd66c30 type:MM_FILEPAGES val:33 [ 41.779617] BUG: Bad rss-counter state mm:000000000cd66c30 type:MM_ANONPAGES val:22 [ 42.274306] BUG: Bad rss-counter state mm:00000000f0a8889f type:MM_FILEPAGES val:33 [ 42.276064] BUG: Bad rss-counter state mm:00000000f0a8889f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10633' (ECDSA) to the list of known hosts. 2023/06/20 05:02:19 fuzzer started 2023/06/20 05:02:19 dialing manager at localhost:44161 2023/06/20 05:02:19 checking machine... 2023/06/20 05:02:19 checking revisions... [ 43.074479] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:02:20 testing simple program... [ 43.136206] cgroup: Unknown subsys name 'net' [ 43.225442] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:02:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801cd9f938 RCX=0000000000000001 RDX=1ffff110039b3f28 RSI=ffff88801cd9fe50 RDI=ffff88801cd9f940 RBP=ffff88801cd9fe50 RSP=ffff88801cd9f890 R8 =ffffffff86141ef8 R9 =ffff88801cd9f978 R10=0000000000038001 R11=00000000000229dc R12=0000000000000008 R13=ffff88801cd9f980 R14=ffff88801cd9fe58 R15=ffff88801cd9f938 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 00007fdc70937900 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=00007fdc70eef0b0 CR3=000000001a282000 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=ffff88806cf35000 RCX=ffffffff81534376 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8452fd53 RSP=ffff88806cf09da8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000283 R13=ffffea000065dc00 R14=ffffffff818c7463 R15=ffff88800d89e480 RIP=ffffffff8135b905 RFL=00000086 [--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 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=00007f172eccdc10 CR3=000000000d65a000 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=a03f1ef8152111a28c4665e04c4fef16 XMM02=ec2efd57dc4c00df000000000011d928 XMM03=3f6d99b78310ea8d000000000011d9f8 XMM04=b0ddf719400f4cae00000000000ae988 XMM05=f783cba0e43211740000000000135c18 XMM06=806171799158d9670000000000134db8 XMM07=e042d86d42eb936e00000000001245d8 XMM08=3f6d99b78310ea8d000000000011d9f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000