syzkaller login: [ 33.045460] BUG: Bad rss-counter state mm:00000000be5cd63b type:MM_FILEPAGES val:33 [ 33.047030] BUG: Bad rss-counter state mm:00000000be5cd63b type:MM_ANONPAGES val:22 [ 33.183469] ================================================================== [ 33.184543] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.185822] Read of size 8 at addr ffff88800d854ed8 by task sshd/219 [ 33.186792] [ 33.187023] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.187918] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.188911] Call Trace: [ 33.189233] [ 33.189523] dump_stack_lvl+0x91/0xf0 [ 33.190065] print_report+0xcc/0x620 [ 33.190556] ? __virt_addr_valid+0x102/0x340 [ 33.191127] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.191762] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.192394] kasan_report+0xbe/0xf0 [ 33.192895] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.193537] vma_interval_tree_remove+0xc75/0xec0 [ 33.194185] vma_prepare+0xc54/0x11a0 [ 33.194681] __split_vma+0x5af/0x950 [ 33.195190] ? __pfx___split_vma+0x10/0x10 [ 33.195738] ? find_held_lock+0x2c/0x110 [ 33.196287] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.196883] ? lock_is_held_type+0x9f/0x120 [ 33.197442] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.198111] ? mtree_range_walk+0x632/0x900 [ 33.198672] ? mas_walk+0x5c7/0x7c0 [ 33.199187] do_vmi_munmap+0x1f1/0x2b0 [ 33.199691] mmap_region+0x1f9/0x2660 [ 33.200209] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.200740] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.201497] ? __pfx_lock_acquire+0x10/0x10 [ 33.202088] ? __pfx_mmap_region+0x10/0x10 [ 33.202638] ? security_mmap_addr+0x7d/0xa0 [ 33.203204] ? get_unmapped_area+0x1f5/0x3f0 [ 33.203801] do_mmap+0x854/0xf00 [ 33.204255] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.204780] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.205366] ksys_mmap_pgoff+0x3af/0x500 [ 33.205916] do_syscall_64+0x3f/0x90 [ 33.206426] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.207122] RIP: 0033:0x7f2abaa77d82 [ 33.207594] 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 [ 33.209843] RSP: 002b:00007fff335a38d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.210809] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2abaa77d82 [ 33.211705] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2ab9eb1000 [ 33.212604] RBP: 00007f2ab9eb1000 R08: 0000000000000009 R09: 0000000000001000 [ 33.213508] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564b629e8d90 [ 33.214412] R13: 00007fff335a38f0 R14: 00007fff335a3920 R15: 00007fff335a3c80 [ 33.215320] [ 33.215622] [ 33.215857] Allocated by task 212: [ 33.216296] kasan_save_stack+0x22/0x50 [ 33.216813] kasan_set_track+0x25/0x30 [ 33.217316] __kasan_slab_alloc+0x59/0x70 [ 33.217865] kmem_cache_alloc+0x16b/0x370 [ 33.218429] vm_area_dup+0x20/0x160 [ 33.218916] __split_vma+0x170/0x950 [ 33.219388] split_vma+0xc6/0x110 [ 33.219844] mprotect_fixup+0x8d2/0xb30 [ 33.220356] do_mprotect_pkey+0x87e/0xd40 [ 33.220894] __x64_sys_mprotect+0x78/0xc0 [ 33.221427] do_syscall_64+0x3f/0x90 [ 33.221933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.222596] [ 33.222850] Freed by task 212: [ 33.223247] kasan_save_stack+0x22/0x50 [ 33.223766] kasan_set_track+0x25/0x30 [ 33.224284] kasan_save_free_info+0x2b/0x50 [ 33.224845] __kasan_slab_free+0x10a/0x190 [ 33.225404] kmem_cache_free+0x10d/0x4d0 [ 33.226074] rcu_core+0x8c8/0x2860 [ 33.226535] __do_softirq+0x1b7/0x7d4 [ 33.227046] [ 33.227271] Last potentially related work creation: [ 33.227875] kasan_save_stack+0x22/0x50 [ 33.228389] __kasan_record_aux_stack+0x8e/0xa0 [ 33.228994] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.229656] remove_vma+0x139/0x170 [ 33.230145] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.230721] do_vmi_munmap+0x1f1/0x2b0 [ 33.231375] __vm_munmap+0x138/0x3a0 [ 33.232013] __x64_sys_munmap+0x59/0x80 [ 33.232686] do_syscall_64+0x3f/0x90 [ 33.233321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.234187] [ 33.234481] The buggy address belongs to the object at ffff88800d854e80 [ 33.234481] which belongs to the cache vm_area_struct of size 168 [ 33.236430] The buggy address is located 88 bytes inside of [ 33.236430] freed 168-byte region [ffff88800d854e80, ffff88800d854f28) [ 33.238125] [ 33.238347] The buggy address belongs to the physical page: [ 33.239036] page:000000001a198197 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd854 [ 33.240154] memcg:ffff88801839f301 [ 33.240593] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.241281] page_type: 0xffffffff() [ 33.241741] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.242732] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801839f301 [ 33.243681] page dumped because: kasan: bad access detected [ 33.244373] [ 33.244594] Memory state around the buggy address: [ 33.245217] ffff88800d854d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.246117] ffff88800d854e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 33.247005] >ffff88800d854e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.247873] ^ [ 33.248619] ffff88800d854f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 33.249523] ffff88800d854f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.250431] ================================================================== [ 33.251528] Disabling lock debugging due to kernel taint [ 36.084976] BUG: Bad rss-counter state mm:00000000b6d69eec type:MM_FILEPAGES val:33 [ 36.086376] BUG: Bad rss-counter state mm:00000000b6d69eec type:MM_ANONPAGES val:22 [ 36.663130] BUG: Bad rss-counter state mm:0000000090ef5ea2 type:MM_FILEPAGES val:33 [ 36.664305] BUG: Bad rss-counter state mm:0000000090ef5ea2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2320' (ECDSA) to the list of known hosts. 2023/06/19 23:45:35 fuzzer started 2023/06/19 23:45:35 dialing manager at localhost:44161 2023/06/19 23:45:35 checking machine... 2023/06/19 23:45:35 checking revisions... [ 37.300841] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:45:35 testing simple program... [ 37.357640] cgroup: Unknown subsys name 'net' [ 37.412712] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:45:33 Registers: info registers vcpu 0 RAX=0000000000002569 RBX=ffff888016bac140 RCX=ffffffff8181f483 RDX=ffffed1002d75829 RSI=0000000000000008 RDI=ffff888016bac140 RBP=0000000000000009 RSP=ffff888016ef77d8 R8 =0000000000000001 R9 =ffffed1002d75828 R10=ffff888016bac147 R11=00000000000b6996 R12=ffff888016bac140 R13=0000000000000009 R14=0000000000000001 R15=ffff888008c46000 RIP=ffffffff8181f48f RFL=00000017 [----APC] 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 00007f603430a700 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=00007f0a10e7e5f0 CR3=0000000019562000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a32343932352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323439 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=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81806192 RDI=ffff88806cf3de20 RBP=1ffff11003043f29 RSP=ffff88801821f938 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000d000c R12=ffff88806cf3de20 R13=ffffffff81806192 R14=0000000000000000 R15=0000000000000008 RIP=ffffffff812d8681 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 00007f9018178900 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=00007ffe458cf000 CR3=000000000ca9a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000