syzkaller login: [ 38.846648] BUG: Bad rss-counter state mm:00000000069df063 type:MM_FILEPAGES val:33 [ 38.847923] BUG: Bad rss-counter state mm:00000000069df063 type:MM_ANONPAGES val:22 [ 38.881378] ================================================================== [ 38.882287] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.883227] Read of size 8 at addr ffff888019c3ca50 by task sshd/219 [ 38.884185] [ 38.884410] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.885290] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.886291] Call Trace: [ 38.886615] [ 38.886899] dump_stack_lvl+0x91/0xf0 [ 38.887398] print_report+0xcc/0x620 [ 38.887890] ? __virt_addr_valid+0x102/0x340 [ 38.888452] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.889077] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.889697] kasan_report+0xbe/0xf0 [ 38.890180] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.890802] vma_interval_tree_remove+0xc75/0xec0 [ 38.891397] vma_prepare+0xc54/0x11a0 [ 38.891879] __split_vma+0x5af/0x950 [ 38.892372] ? __pfx___split_vma+0x10/0x10 [ 38.892913] ? find_held_lock+0x2c/0x110 [ 38.893440] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.894009] ? lock_is_held_type+0x9f/0x120 [ 38.894553] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.895171] ? mtree_range_walk+0x632/0x900 [ 38.895731] ? mas_walk+0x5c7/0x7c0 [ 38.896213] do_vmi_munmap+0x1f1/0x2b0 [ 38.896722] mmap_region+0x1f9/0x2660 [ 38.897207] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.897722] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.898435] ? __pfx_lock_acquire+0x10/0x10 [ 38.898971] ? __pfx_mmap_region+0x10/0x10 [ 38.899503] ? security_mmap_addr+0x7d/0xa0 [ 38.900029] ? get_unmapped_area+0x1f5/0x3f0 [ 38.900601] do_mmap+0x854/0xf00 [ 38.901048] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.901559] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.902123] ksys_mmap_pgoff+0x3af/0x500 [ 38.902643] do_syscall_64+0x3f/0x90 [ 38.903126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.903769] RIP: 0033:0x7fb0432c6d82 [ 38.904227] 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 [ 38.906384] RSP: 002b:00007ffc66b551b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.907309] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb0432c6d82 [ 38.908163] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb042700000 [ 38.909034] RBP: 00007fb042700000 R08: 0000000000000009 R09: 0000000000001000 [ 38.909895] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559f81232b20 [ 38.910750] R13: 00007ffc66b551d0 R14: 00007ffc66b55200 R15: 00007ffc66b55560 [ 38.911629] [ 38.911925] [ 38.912144] Allocated by task 212: [ 38.912597] kasan_save_stack+0x22/0x50 [ 38.913111] kasan_set_track+0x25/0x30 [ 38.913612] __kasan_slab_alloc+0x59/0x70 [ 38.914144] kmem_cache_alloc+0x16b/0x370 [ 38.914666] vm_area_dup+0x20/0x160 [ 38.915142] __split_vma+0x170/0x950 [ 38.915617] split_vma+0xc6/0x110 [ 38.916064] mprotect_fixup+0x8d2/0xb30 [ 38.916578] do_mprotect_pkey+0x87e/0xd40 [ 38.917103] __x64_sys_mprotect+0x78/0xc0 [ 38.917630] do_syscall_64+0x3f/0x90 [ 38.918120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.918760] [ 38.918981] Freed by task 212: [ 38.919376] kasan_save_stack+0x22/0x50 [ 38.919880] kasan_set_track+0x25/0x30 [ 38.920399] kasan_save_free_info+0x2b/0x50 [ 38.920942] __kasan_slab_free+0x10a/0x190 [ 38.921475] kmem_cache_free+0x10d/0x4d0 [ 38.921983] rcu_core+0x8c8/0x2860 [ 38.922427] __do_softirq+0x1b7/0x7d4 [ 38.922904] [ 38.923124] Last potentially related work creation: [ 38.923716] kasan_save_stack+0x22/0x50 [ 38.924221] __kasan_record_aux_stack+0x8e/0xa0 [ 38.924815] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.925460] remove_vma+0x139/0x170 [ 38.925910] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.926470] do_vmi_munmap+0x1f1/0x2b0 [ 38.926957] __vm_munmap+0x138/0x3a0 [ 38.927425] __x64_sys_munmap+0x59/0x80 [ 38.927922] do_syscall_64+0x3f/0x90 [ 38.928418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.929065] [ 38.929281] The buggy address belongs to the object at ffff888019c3c9f8 [ 38.929281] which belongs to the cache vm_area_struct of size 168 [ 38.930753] The buggy address is located 88 bytes inside of [ 38.930753] freed 168-byte region [ffff888019c3c9f8, ffff888019c3caa0) [ 38.932164] [ 38.932389] The buggy address belongs to the physical page: [ 38.933051] page:000000004bf10864 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c3c [ 38.934141] memcg:ffff888018e54f01 [ 38.934574] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.935279] page_type: 0xffffffff() [ 38.935731] raw: 0100000000000200 ffff8880087a0c80 ffffea00005a8f40 dead000000000005 [ 38.936660] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e54f01 [ 38.937572] page dumped because: kasan: bad access detected [ 38.938233] [ 38.938455] Memory state around the buggy address: [ 38.939038] ffff888019c3c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.939907] ffff888019c3c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.940789] >ffff888019c3ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.941657] ^ [ 38.942360] ffff888019c3ca80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 38.943226] ffff888019c3cb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.944081] ================================================================== [ 38.945210] Disabling lock debugging due to kernel taint [ 41.467815] BUG: Bad rss-counter state mm:00000000b693bdf9 type:MM_FILEPAGES val:33 [ 41.468763] BUG: Bad rss-counter state mm:00000000b693bdf9 type:MM_ANONPAGES val:22 [ 42.056400] BUG: Bad rss-counter state mm:00000000bb0d2c1b type:MM_FILEPAGES val:33 [ 42.057323] BUG: Bad rss-counter state mm:00000000bb0d2c1b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64036' (ECDSA) to the list of known hosts. 2023/06/20 19:59:16 fuzzer started 2023/06/20 19:59:16 dialing manager at localhost:36067 2023/06/20 19:59:16 checking machine... 2023/06/20 19:59:16 checking revisions... [ 42.760626] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:59:16 testing simple program... [ 42.806587] cgroup: Unknown subsys name 'net' [ 42.844323] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:59:16 Registers: info registers vcpu 0 RAX=ffff88800f0a1f00 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11001e143e0 RSI=ffffffff83c20753 RDI=ffff88801a4b6a38 RBP=ffff88800f0a1800 RSP=ffff888016bbf9c0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800f0a1d10 R13=ffff88800f0a1f00 R14=ffff88800f0a19b8 R15=ffff88801a4b6a00 RIP=ffffffff83c20782 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 00007f3da52ab700 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=00007f9213e9da00 CR3=000000000dc16000 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=6465736f6c63206e6f697463656e6e6f XMM02=2e3031207962206465736f6c63206e6f XMM03=6873732036313a39353a393120303220 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303030 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=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86138a60 RDX=0000000000000008 RSI=ffff8880143c7418 RDI=ffff8880143c7158 RBP=ffff8880143c71b0 RSP=ffff8880143c70e0 R8 =0000000000000001 R9 =ffff8880143c7198 R10=0000000000038001 R11=0000000000020ce4 R12=ffff8880143c71b8 R13=ffff8880143c71a0 R14=ffff8880143c7418 R15=ffff8880143c7158 RIP=ffffffff811303fa RFL=00000287 [--S--PC] 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 00007fd0c7daf900 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=0000561860c2db88 CR3=000000000c9ea000 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=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