syzkaller login: [ 40.445533] BUG: Bad rss-counter state mm:00000000d44abeb8 type:MM_FILEPAGES val:33 [ 40.446533] BUG: Bad rss-counter state mm:00000000d44abeb8 type:MM_ANONPAGES val:22 [ 40.597496] ================================================================== [ 40.598419] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.599355] Read of size 8 at addr ffff88800dbdf058 by task sshd/219 [ 40.600127] [ 40.600349] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.601398] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.602383] Call Trace: [ 40.602709] [ 40.602998] dump_stack_lvl+0x91/0xf0 [ 40.603496] print_report+0xcc/0x620 [ 40.603976] ? __virt_addr_valid+0x102/0x340 [ 40.604528] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.605167] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.605787] kasan_report+0xbe/0xf0 [ 40.606269] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.606905] vma_interval_tree_remove+0xc75/0xec0 [ 40.607517] vma_prepare+0xc54/0x11a0 [ 40.608006] __split_vma+0x5af/0x950 [ 40.608479] ? __pfx___split_vma+0x10/0x10 [ 40.609020] ? find_held_lock+0x2c/0x110 [ 40.609543] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.610114] ? lock_is_held_type+0x9f/0x120 [ 40.610651] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.611273] ? mtree_range_walk+0x632/0x900 [ 40.611828] ? mas_walk+0x5c7/0x7c0 [ 40.612307] do_vmi_munmap+0x1f1/0x2b0 [ 40.612799] mmap_region+0x1f9/0x2660 [ 40.613300] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.613813] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.614539] ? __pfx_lock_acquire+0x10/0x10 [ 40.615075] ? __pfx_mmap_region+0x10/0x10 [ 40.615606] ? security_mmap_addr+0x7d/0xa0 [ 40.616140] ? get_unmapped_area+0x1f5/0x3f0 [ 40.616691] do_mmap+0x854/0xf00 [ 40.617159] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.617653] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.618222] ksys_mmap_pgoff+0x3af/0x500 [ 40.618732] do_syscall_64+0x3f/0x90 [ 40.619215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.619862] RIP: 0033:0x7f12b10e7d82 [ 40.620327] 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 [ 40.622459] RSP: 002b:00007fffcf4b06b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.623367] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f12b10e7d82 [ 40.624231] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f12b0521000 [ 40.625100] RBP: 00007f12b0521000 R08: 0000000000000009 R09: 0000000000001000 [ 40.625985] R10: 0000000000000812 R11: 0000000000000206 R12: 000055679571aec0 [ 40.626854] R13: 00007fffcf4b06d0 R14: 00007fffcf4b0700 R15: 00007fffcf4b0a60 [ 40.627750] [ 40.628054] [ 40.628279] Allocated by task 212: [ 40.628717] kasan_save_stack+0x22/0x50 [ 40.629254] kasan_set_track+0x25/0x30 [ 40.629754] __kasan_slab_alloc+0x59/0x70 [ 40.630297] kmem_cache_alloc+0x16b/0x370 [ 40.630826] vm_area_dup+0x20/0x160 [ 40.631299] __split_vma+0x170/0x950 [ 40.631790] split_vma+0xc6/0x110 [ 40.632252] mprotect_fixup+0x8d2/0xb30 [ 40.632775] do_mprotect_pkey+0x87e/0xd40 [ 40.633343] __x64_sys_mprotect+0x78/0xc0 [ 40.633890] do_syscall_64+0x3f/0x90 [ 40.634384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.635059] [ 40.635286] Freed by task 212: [ 40.635701] kasan_save_stack+0x22/0x50 [ 40.636234] kasan_set_track+0x25/0x30 [ 40.636757] kasan_save_free_info+0x2b/0x50 [ 40.637345] __kasan_slab_free+0x10a/0x190 [ 40.637900] kmem_cache_free+0x10d/0x4d0 [ 40.638441] rcu_core+0x8c8/0x2860 [ 40.638913] __do_softirq+0x1b7/0x7d4 [ 40.639414] [ 40.639641] Last potentially related work creation: [ 40.640254] kasan_save_stack+0x22/0x50 [ 40.640780] __kasan_record_aux_stack+0x8e/0xa0 [ 40.641395] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.642077] remove_vma+0x139/0x170 [ 40.642600] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.643188] do_vmi_munmap+0x1f1/0x2b0 [ 40.643701] __vm_munmap+0x138/0x3a0 [ 40.644197] __x64_sys_munmap+0x59/0x80 [ 40.644717] do_syscall_64+0x3f/0x90 [ 40.645238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.645928] [ 40.646154] The buggy address belongs to the object at ffff88800dbdf000 [ 40.646154] which belongs to the cache vm_area_struct of size 168 [ 40.647719] The buggy address is located 88 bytes inside of [ 40.647719] freed 168-byte region [ffff88800dbdf000, ffff88800dbdf0a8) [ 40.649237] [ 40.649464] The buggy address belongs to the physical page: [ 40.650166] page:000000006008c540 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbdf [ 40.651320] memcg:ffff88800dca6001 [ 40.651766] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.652459] page_type: 0xffffffff() [ 40.652957] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 40.653931] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dca6001 [ 40.654897] page dumped because: kasan: bad access detected [ 40.655607] [ 40.655832] Memory state around the buggy address: [ 40.656451] ffff88800dbdef00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 40.657380] ffff88800dbdef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.658287] >ffff88800dbdf000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.659194] ^ [ 40.659966] ffff88800dbdf080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 40.660893] ffff88800dbdf100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.661804] ================================================================== [ 40.662875] Disabling lock debugging due to kernel taint [ 42.782488] BUG: Bad rss-counter state mm:00000000e43b92a2 type:MM_FILEPAGES val:33 [ 42.783636] BUG: Bad rss-counter state mm:00000000e43b92a2 type:MM_ANONPAGES val:22 [ 43.218511] BUG: Bad rss-counter state mm:00000000452f3f06 type:MM_FILEPAGES val:33 [ 43.219511] BUG: Bad rss-counter state mm:00000000452f3f06 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27399' (ECDSA) to the list of known hosts. 2023/06/20 02:38:02 fuzzer started 2023/06/20 02:38:02 dialing manager at localhost:44161 2023/06/20 02:38:02 checking machine... 2023/06/20 02:38:02 checking revisions... [ 43.958271] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:38:02 testing simple program... [ 44.003123] cgroup: Unknown subsys name 'net' [ 44.042044] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:38:00 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=0000000000000001 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=000055f9f227af88 CR3=0000000019c16000 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=38333a3230203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732032303a3833 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363234 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=00007ff44f085477 RCX=0000000000000000 RDX=ffff888018e90000 RSI=ffffffff81007b50 RDI=00007ff44f085477 RBP=00007ff44f085477 RSP=ffff8880164c78d8 R8 =ffffffff864b9d5a R9 =ffff8880164c7990 R10=0000000000038001 R11=00000000000b6996 R12=ffff8880164c7a18 R13=0000000000000000 R14=ffff888018e90000 R15=ffff88800fb6b000 RIP=ffffffff81007b50 RFL=00000293 [--S-A-C] 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 00007ff44eb92900 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=00007ff44f147650 CR3=000000000d82a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000