syzkaller login: [ 32.684649] BUG: Bad rss-counter state mm:000000006013cf2c type:MM_FILEPAGES val:33 [ 32.686632] BUG: Bad rss-counter state mm:000000006013cf2c type:MM_ANONPAGES val:22 [ 32.897487] ================================================================== [ 32.898420] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.899362] Read of size 8 at addr ffff88800e7fe058 by task sshd/220 [ 32.900156] [ 32.900373] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.901439] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.902422] Call Trace: [ 32.902752] [ 32.903134] dump_stack_lvl+0x91/0xf0 [ 32.903745] print_report+0xcc/0x620 [ 32.904332] ? __virt_addr_valid+0x102/0x340 [ 32.904981] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.905754] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.906494] kasan_report+0xbe/0xf0 [ 32.907080] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.907850] vma_interval_tree_remove+0xc75/0xec0 [ 32.908602] vma_prepare+0xc54/0x11a0 [ 32.909213] __split_vma+0x5af/0x950 [ 32.909810] ? __pfx___split_vma+0x10/0x10 [ 32.910474] ? find_held_lock+0x2c/0x110 [ 32.911128] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.911831] ? lock_is_held_type+0x9f/0x120 [ 32.912501] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.913298] ? mtree_range_walk+0x632/0x900 [ 32.913985] ? mas_walk+0x5c7/0x7c0 [ 32.914462] do_vmi_munmap+0x1f1/0x2b0 [ 32.914963] mmap_region+0x1f9/0x2660 [ 32.915450] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.915960] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.916677] ? __pfx_lock_acquire+0x10/0x10 [ 32.917220] ? __pfx_mmap_region+0x10/0x10 [ 32.917763] ? security_mmap_addr+0x7d/0xa0 [ 32.918298] ? get_unmapped_area+0x1f5/0x3f0 [ 32.918864] do_mmap+0x854/0xf00 [ 32.919304] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.919803] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.920370] ksys_mmap_pgoff+0x3af/0x500 [ 32.920871] do_syscall_64+0x3f/0x90 [ 32.921367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.922009] RIP: 0033:0x7f5ebdf52d82 [ 32.922465] 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 [ 32.924595] RSP: 002b:00007ffd2538c168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.925515] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5ebdf52d82 [ 32.926360] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5ebd38c000 [ 32.927210] RBP: 00007f5ebd38c000 R08: 0000000000000009 R09: 0000000000001000 [ 32.928055] R10: 0000000000000812 R11: 0000000000000206 R12: 000056083ae90b20 [ 32.928893] R13: 00007ffd2538c180 R14: 00007ffd2538c1b0 R15: 00007ffd2538c510 [ 32.929773] [ 32.930074] [ 32.930291] Allocated by task 211: [ 32.930714] kasan_save_stack+0x22/0x50 [ 32.931222] kasan_set_track+0x25/0x30 [ 32.931721] __kasan_slab_alloc+0x59/0x70 [ 32.932243] kmem_cache_alloc+0x16b/0x370 [ 32.932760] vm_area_dup+0x20/0x160 [ 32.933228] __split_vma+0x170/0x950 [ 32.933700] split_vma+0xc6/0x110 [ 32.934144] mprotect_fixup+0x8d2/0xb30 [ 32.934649] do_mprotect_pkey+0x87e/0xd40 [ 32.935170] __x64_sys_mprotect+0x78/0xc0 [ 32.935700] do_syscall_64+0x3f/0x90 [ 32.936172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.936806] [ 32.937023] Freed by task 211: [ 32.937445] kasan_save_stack+0x22/0x50 [ 32.937948] kasan_set_track+0x25/0x30 [ 32.938442] kasan_save_free_info+0x2b/0x50 [ 32.938982] __kasan_slab_free+0x10a/0x190 [ 32.939520] kmem_cache_free+0x10d/0x4d0 [ 32.940028] rcu_core+0x8c8/0x2860 [ 32.940489] __do_softirq+0x1b7/0x7d4 [ 32.940971] [ 32.941194] Last potentially related work creation: [ 32.941859] kasan_save_stack+0x22/0x50 [ 32.942363] __kasan_record_aux_stack+0x8e/0xa0 [ 32.942950] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.943583] remove_vma+0x139/0x170 [ 32.944045] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.944602] do_vmi_munmap+0x1f1/0x2b0 [ 32.945100] __vm_munmap+0x138/0x3a0 [ 32.945598] __x64_sys_munmap+0x59/0x80 [ 32.946118] do_syscall_64+0x3f/0x90 [ 32.946590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.947233] [ 32.947451] Second to last potentially related work creation: [ 32.948130] kasan_save_stack+0x22/0x50 [ 32.948631] __kasan_record_aux_stack+0x8e/0xa0 [ 32.949211] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.949868] remove_vma+0x139/0x170 [ 32.950326] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.950877] do_vmi_munmap+0x1f1/0x2b0 [ 32.951362] mmap_region+0x1f9/0x2660 [ 32.951842] do_mmap+0x854/0xf00 [ 32.952275] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.952766] ksys_mmap_pgoff+0x3af/0x500 [ 32.953273] do_syscall_64+0x3f/0x90 [ 32.953757] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.954406] [ 32.954624] The buggy address belongs to the object at ffff88800e7fe000 [ 32.954624] which belongs to the cache vm_area_struct of size 168 [ 32.956090] The buggy address is located 88 bytes inside of [ 32.956090] freed 168-byte region [ffff88800e7fe000, ffff88800e7fe0a8) [ 32.957511] [ 32.957729] The buggy address belongs to the physical page: [ 32.958393] page:00000000d3108626 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7fe [ 32.959479] memcg:ffff88800eb05a01 [ 32.959910] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.960546] page_type: 0xffffffff() [ 32.961000] raw: 0100000000000200 ffff88800879fc80 ffffea0000365440 dead000000000006 [ 32.961930] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb05a01 [ 32.962830] page dumped because: kasan: bad access detected [ 32.963488] [ 32.963707] Memory state around the buggy address: [ 32.964299] ffff88800e7fdf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.965236] ffff88800e7fdf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.966087] >ffff88800e7fe000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.966941] ^ [ 32.967678] ffff88800e7fe080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 32.968547] ffff88800e7fe100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.969430] ================================================================== [ 32.970422] Disabling lock debugging due to kernel taint [ 35.274040] BUG: Bad rss-counter state mm:0000000073d08893 type:MM_FILEPAGES val:33 [ 35.275062] BUG: Bad rss-counter state mm:0000000073d08893 type:MM_ANONPAGES val:22 [ 35.776023] BUG: Bad rss-counter state mm:000000007bfb8b19 type:MM_FILEPAGES val:33 [ 35.777255] BUG: Bad rss-counter state mm:000000007bfb8b19 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12248' (ECDSA) to the list of known hosts. 2023/06/20 00:33:32 fuzzer started 2023/06/20 00:33:33 dialing manager at localhost:44161 2023/06/20 00:33:33 checking machine... 2023/06/20 00:33:33 checking revisions... [ 36.493023] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:33:33 testing simple program... [ 36.554732] cgroup: Unknown subsys name 'net' [ 36.599761] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:33:28 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffdef3bb4a8 CR3=000000000da96000 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=2032333a33333a3030203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a33333a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888019c7d780 RCX=0000000000000000 RDX=1ffffffff0921293 RSI=ffffffff818c668a RDI=ffffffff84909498 RBP=ffffffff84909480 RSP=ffff8880147af820 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=3830306234386136 R12=0000000010000000 R13=ffff888019c7d858 R14=0000000000000000 R15=ffff8880147af8a8 RIP=ffffffff814c07e0 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 00007fa696963900 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=00007fb3ec865650 CR3=000000000d648000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=78169eb5c204904d00000000000ae988 XMM05=0fc7f9440e1c6d330000000000136048 XMM06=806171799158d9670000000000134e38 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000