syzkaller login: [ 24.081328] BUG: Bad rss-counter state mm:000000001edcd0ed type:MM_FILEPAGES val:33 [ 24.082514] BUG: Bad rss-counter state mm:000000001edcd0ed type:MM_ANONPAGES val:22 [ 24.120129] ================================================================== [ 24.121073] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.122006] Read of size 8 at addr ffff88800e3c5c20 by task sshd/220 [ 24.122755] [ 24.122968] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.123820] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.124796] Call Trace: [ 24.125122] [ 24.125403] dump_stack_lvl+0x91/0xf0 [ 24.125887] print_report+0xcc/0x620 [ 24.126367] ? __virt_addr_valid+0x102/0x340 [ 24.126906] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.127516] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.128126] kasan_report+0xbe/0xf0 [ 24.128598] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.129234] vma_interval_tree_remove+0xc75/0xec0 [ 24.129832] vma_prepare+0xc54/0x11a0 [ 24.130307] __split_vma+0x5af/0x950 [ 24.130778] ? __pfx___split_vma+0x10/0x10 [ 24.131303] ? find_held_lock+0x2c/0x110 [ 24.131818] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.132373] ? lock_is_held_type+0x9f/0x120 [ 24.132910] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.133525] ? mtree_range_walk+0x632/0x900 [ 24.134084] ? mas_walk+0x5c7/0x7c0 [ 24.134561] do_vmi_munmap+0x1f1/0x2b0 [ 24.135049] mmap_region+0x1f9/0x2660 [ 24.135524] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.136032] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.136736] ? __pfx_lock_acquire+0x10/0x10 [ 24.137277] ? __pfx_mmap_region+0x10/0x10 [ 24.137805] ? security_mmap_addr+0x7d/0xa0 [ 24.138325] ? get_unmapped_area+0x1f5/0x3f0 [ 24.138878] do_mmap+0x854/0xf00 [ 24.139310] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.139802] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.140365] ksys_mmap_pgoff+0x3af/0x500 [ 24.140867] do_syscall_64+0x3f/0x90 [ 24.141353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.141992] RIP: 0033:0x7f30323f7d82 [ 24.142446] 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 [ 24.144551] RSP: 002b:00007ffe8eb62968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.145459] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f30323f7d82 [ 24.146296] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3031831000 [ 24.147142] RBP: 00007f3031831000 R08: 0000000000000009 R09: 0000000000001000 [ 24.147993] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561014c51d90 [ 24.148945] R13: 00007ffe8eb62980 R14: 00007ffe8eb629b0 R15: 00007ffe8eb62d10 [ 24.149813] [ 24.150103] [ 24.150336] Allocated by task 213: [ 24.150767] kasan_save_stack+0x22/0x50 [ 24.151264] kasan_set_track+0x25/0x30 [ 24.151758] __kasan_slab_alloc+0x59/0x70 [ 24.152277] kmem_cache_alloc+0x16b/0x370 [ 24.152790] vm_area_dup+0x20/0x160 [ 24.153253] __split_vma+0x170/0x950 [ 24.153724] split_vma+0xc6/0x110 [ 24.154157] mprotect_fixup+0x8d2/0xb30 [ 24.154654] do_mprotect_pkey+0x87e/0xd40 [ 24.155170] __x64_sys_mprotect+0x78/0xc0 [ 24.155696] do_syscall_64+0x3f/0x90 [ 24.156166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.156806] [ 24.157035] Freed by task 213: [ 24.157421] kasan_save_stack+0x22/0x50 [ 24.157929] kasan_set_track+0x25/0x30 [ 24.158413] kasan_save_free_info+0x2b/0x50 [ 24.158944] __kasan_slab_free+0x10a/0x190 [ 24.159478] kmem_cache_free+0x10d/0x4d0 [ 24.159990] rcu_core+0x8c8/0x2860 [ 24.160428] __do_softirq+0x1b7/0x7d4 [ 24.160904] [ 24.161131] Last potentially related work creation: [ 24.161719] kasan_save_stack+0x22/0x50 [ 24.162219] __kasan_record_aux_stack+0x8e/0xa0 [ 24.162800] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.163441] remove_vma+0x139/0x170 [ 24.163888] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.164441] do_vmi_munmap+0x1f1/0x2b0 [ 24.164925] __vm_munmap+0x138/0x3a0 [ 24.165408] __x64_sys_munmap+0x59/0x80 [ 24.165904] do_syscall_64+0x3f/0x90 [ 24.166372] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.167009] [ 24.167227] Second to last potentially related work creation: [ 24.167897] kasan_save_stack+0x22/0x50 [ 24.168397] __kasan_record_aux_stack+0x8e/0xa0 [ 24.168968] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.169619] remove_vma+0x139/0x170 [ 24.170071] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.170627] do_vmi_munmap+0x1f1/0x2b0 [ 24.171109] mmap_region+0x1f9/0x2660 [ 24.171585] do_mmap+0x854/0xf00 [ 24.172016] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.172501] ksys_mmap_pgoff+0x3af/0x500 [ 24.173001] do_syscall_64+0x3f/0x90 [ 24.173475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.174108] [ 24.174323] The buggy address belongs to the object at ffff88800e3c5bc8 [ 24.174323] which belongs to the cache vm_area_struct of size 168 [ 24.175788] The buggy address is located 88 bytes inside of [ 24.175788] freed 168-byte region [ffff88800e3c5bc8, ffff88800e3c5c70) [ 24.177195] [ 24.177411] The buggy address belongs to the physical page: [ 24.178061] page:0000000005aa7447 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3c5 [ 24.179136] memcg:ffff88800dbef901 [ 24.179558] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.180205] page_type: 0xffffffff() [ 24.180652] raw: 0100000000000200 ffff8880087a0c80 ffffea0000388140 dead000000000004 [ 24.181565] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbef901 [ 24.182469] page dumped because: kasan: bad access detected [ 24.183121] [ 24.183334] Memory state around the buggy address: [ 24.183906] ffff88800e3c5b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.184748] ffff88800e3c5b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.185633] >ffff88800e3c5c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.186474] ^ [ 24.186999] ffff88800e3c5c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 24.187850] ffff88800e3c5d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 24.188697] ================================================================== [ 24.189764] Disabling lock debugging due to kernel taint [ 26.065527] BUG: Bad rss-counter state mm:000000006399e006 type:MM_FILEPAGES val:33 [ 26.066537] BUG: Bad rss-counter state mm:000000006399e006 type:MM_ANONPAGES val:22 [ 26.524949] BUG: Bad rss-counter state mm:00000000394eeeb9 type:MM_FILEPAGES val:33 [ 26.525861] BUG: Bad rss-counter state mm:00000000394eeeb9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40001' (ECDSA) to the list of known hosts. 2023/06/21 06:46:45 fuzzer started 2023/06/21 06:46:45 dialing manager at localhost:36067 2023/06/21 06:46:45 checking machine... 2023/06/21 06:46:45 checking revisions... [ 27.255208] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:46:45 testing simple program... [ 27.307399] cgroup: Unknown subsys name 'net' [ 27.347507] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:46:44 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d9fa10 RCX=ffff888008d9f998 RDX=ffff888008d9f978 RSI=ffff888008d90000 RDI=ffff888008d9f928 RBP=ffff888008d90000 RSP=ffff888008d9f920 R8 =0000000000000004 R9 =0000000000000000 R10=ffff888008d9f978 R11=1ffff1100d9c7479 R12=ffff888008d9f998 R13=ffff888008d9f9a0 R14=ffff888008d9f9c0 R15=ffff888008d9f978 RIP=ffffffff8108df64 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 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=00007f90e9f0b044 CR3=0000000016710000 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=00000000000000000000000000000000 XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=53b564bdbad022d5fdc0521519ee413c XMM05=00000000000000000000000000000000 XMM06=537364636375223d736552151973413c XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888008d17648 RCX=ffffffff860d8256 RDX=1ffff110011a2ea4 RSI=0000000000000000 RDI=ffff888008d17520 RBP=ffff888008d10000 RSP=ffff888008d174a0 R8 =ffffffff860d825a R9 =ffff888008d17550 R10=0000000000038001 R11=0000000000010b8d R12=ffff888008d17570 R13=ffff888008d17558 R14=ffff888008d17648 R15=ffff888008d17510 RIP=ffffffff81131ca6 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 00007f0d43683900 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=00007f407a81abb0 CR3=0000000008c5a000 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=68747065642e78616d2e70756f726763 XMM01=68747065642e78616d2e70756f726763 XMM02=69767265732e6c6c696b66722d646d65 XMM03=00656369767265732e6c6c696b66722d XMM04=2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e XMM05=0000000000000000000055e394019c00 XMM06=00000000000000210000000000000000 XMM07=00000000000000000000000000000000 XMM08=7368746150796c6e4f64616552646e69 XMM09=00000000000000000000000000000000 XMM10=00000000002020202020200000002000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000