syzkaller login: [ 38.722517] BUG: Bad rss-counter state mm:0000000068225cc6 type:MM_FILEPAGES val:33 [ 38.723757] BUG: Bad rss-counter state mm:0000000068225cc6 type:MM_ANONPAGES val:22 [ 38.887676] ================================================================== [ 38.888601] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.889542] Read of size 8 at addr ffff88800f5cc880 by task sshd/220 [ 38.890311] [ 38.890533] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.891508] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.892569] Call Trace: [ 38.892890] [ 38.893175] dump_stack_lvl+0x91/0xf0 [ 38.893679] print_report+0xcc/0x620 [ 38.894189] ? __virt_addr_valid+0x102/0x340 [ 38.894739] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.895375] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.895992] kasan_report+0xbe/0xf0 [ 38.896475] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.897096] vma_interval_tree_remove+0xc75/0xec0 [ 38.897695] vma_prepare+0xc54/0x11a0 [ 38.898168] __split_vma+0x5af/0x950 [ 38.898635] ? __pfx___split_vma+0x10/0x10 [ 38.899161] ? find_held_lock+0x2c/0x110 [ 38.899683] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.900252] ? lock_is_held_type+0x9f/0x120 [ 38.900801] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.901404] ? mtree_range_walk+0x632/0x900 [ 38.901953] ? mas_walk+0x5c7/0x7c0 [ 38.902426] do_vmi_munmap+0x1f1/0x2b0 [ 38.902919] mmap_region+0x1f9/0x2660 [ 38.903400] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.903909] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.904642] ? __pfx_lock_acquire+0x10/0x10 [ 38.905171] ? __pfx_mmap_region+0x10/0x10 [ 38.905695] ? security_mmap_addr+0x7d/0xa0 [ 38.906223] ? get_unmapped_area+0x1f5/0x3f0 [ 38.906769] do_mmap+0x854/0xf00 [ 38.907209] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.907700] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.908275] ksys_mmap_pgoff+0x3af/0x500 [ 38.908781] do_syscall_64+0x3f/0x90 [ 38.909263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.909909] RIP: 0033:0x7ff01d8eed82 [ 38.910364] 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 [ 38.912494] RSP: 002b:00007ffe17dcefa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.913406] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff01d8eed82 [ 38.914253] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff01cd28000 [ 38.915110] RBP: 00007ff01cd28000 R08: 0000000000000009 R09: 0000000000001000 [ 38.915952] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b8799ecf70 [ 38.916810] R13: 00007ffe17dcefc0 R14: 00007ffe17dceff0 R15: 00007ffe17dcf350 [ 38.917661] [ 38.917957] [ 38.918175] Allocated by task 213: [ 38.918598] kasan_save_stack+0x22/0x50 [ 38.919104] kasan_set_track+0x25/0x30 [ 38.919598] __kasan_slab_alloc+0x59/0x70 [ 38.920123] kmem_cache_alloc+0x16b/0x370 [ 38.920644] vm_area_dup+0x20/0x160 [ 38.921102] __split_vma+0x170/0x950 [ 38.921586] split_vma+0xc6/0x110 [ 38.922047] mprotect_fixup+0x8d2/0xb30 [ 38.922573] do_mprotect_pkey+0x87e/0xd40 [ 38.923113] __x64_sys_mprotect+0x78/0xc0 [ 38.923654] do_syscall_64+0x3f/0x90 [ 38.924169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.924846] [ 38.925068] Freed by task 213: [ 38.925476] kasan_save_stack+0x22/0x50 [ 38.926005] kasan_set_track+0x25/0x30 [ 38.926525] kasan_save_free_info+0x2b/0x50 [ 38.927080] __kasan_slab_free+0x10a/0x190 [ 38.927633] kmem_cache_free+0x10d/0x4d0 [ 38.928169] rcu_core+0x8c8/0x2860 [ 38.928636] __do_softirq+0x1b7/0x7d4 [ 38.929145] [ 38.929373] Last potentially related work creation: [ 38.929993] kasan_save_stack+0x22/0x50 [ 38.930522] __kasan_record_aux_stack+0x8e/0xa0 [ 38.931124] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.931790] remove_vma+0x139/0x170 [ 38.932283] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.932934] do_vmi_munmap+0x1f1/0x2b0 [ 38.933447] __vm_munmap+0x138/0x3a0 [ 38.933928] __x64_sys_munmap+0x59/0x80 [ 38.934453] do_syscall_64+0x3f/0x90 [ 38.934942] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.935616] [ 38.935842] Second to last potentially related work creation: [ 38.936581] kasan_save_stack+0x22/0x50 [ 38.937108] __kasan_record_aux_stack+0x8e/0xa0 [ 38.937702] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.938380] remove_vma+0x139/0x170 [ 38.938848] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.939431] do_vmi_munmap+0x1f1/0x2b0 [ 38.939931] mmap_region+0x1f9/0x2660 [ 38.940448] do_mmap+0x854/0xf00 [ 38.940900] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.941410] ksys_mmap_pgoff+0x3af/0x500 [ 38.941929] do_syscall_64+0x3f/0x90 [ 38.942428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.943095] [ 38.943325] The buggy address belongs to the object at ffff88800f5cc828 [ 38.943325] which belongs to the cache vm_area_struct of size 168 [ 38.944907] The buggy address is located 88 bytes inside of [ 38.944907] freed 168-byte region [ffff88800f5cc828, ffff88800f5cc8d0) [ 38.946401] [ 38.946628] The buggy address belongs to the physical page: [ 38.947349] page:00000000fa8897ee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf5cc [ 38.948512] memcg:ffff88800c851c01 [ 38.948959] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.949685] page_type: 0xffffffff() [ 38.950162] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.951140] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c851c01 [ 38.952113] page dumped because: kasan: bad access detected [ 38.952815] [ 38.953040] Memory state around the buggy address: [ 38.953647] ffff88800f5cc780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 38.954544] ffff88800f5cc800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.955445] >ffff88800f5cc880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.956349] ^ [ 38.956774] ffff88800f5cc900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.957653] ffff88800f5cc980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 38.958528] ================================================================== [ 38.959558] Disabling lock debugging due to kernel taint [ 41.179293] BUG: Bad rss-counter state mm:0000000040b70ffe type:MM_FILEPAGES val:33 [ 41.180628] BUG: Bad rss-counter state mm:0000000040b70ffe type:MM_ANONPAGES val:22 [ 41.620366] BUG: Bad rss-counter state mm:000000008b471824 type:MM_FILEPAGES val:33 [ 41.621989] BUG: Bad rss-counter state mm:000000008b471824 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54932' (ECDSA) to the list of known hosts. 2023/06/20 21:29:50 fuzzer started 2023/06/20 21:29:50 dialing manager at localhost:36067 2023/06/20 21:29:50 checking machine... 2023/06/20 21:29:50 checking revisions... [ 42.360717] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:29:50 testing simple program... [ 42.409582] cgroup: Unknown subsys name 'net' [ 42.448532] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:29:50 Registers: info registers vcpu 0 RAX=fbfbfbfbfbfbfbfb RBX=0000000000000000 RCX=0000000000000005 RDX=0000000000000200 RSI=00000000000000fb RDI=ffffed1002bd1080 RBP=ffffffff818937f2 RSP=ffff8880147bfd40 R8 =0000000000001100 R9 =0000000000000000 R10=ffffed1002bd1000 R11=00000000000b6a61 R12=ffff888015e88000 R13=ffff8880087b83c0 R14=ffffffff818937f2 R15=dffffc0000000000 RIP=ffffffff84513406 RFL=00000206 [-----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 00007f2c3e816900 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=00007f2c3dd35008 CR3=0000000013aac000 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=2030353a39323a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a39323a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888009ea0000 RSI=0000000000000002 RDI=0000000000000000 RBP=0000000000000002 RSP=ffff8880147ff8c0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff88800ee49000 R13=ffff88800ee490dc R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff814c0400 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 00007f938b595900 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=00007ffce7ef4000 CR3=0000000016ea8000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000