syzkaller login: [ 39.030211] BUG: Bad rss-counter state mm:00000000cbc48783 type:MM_FILEPAGES val:33 [ 39.032133] BUG: Bad rss-counter state mm:00000000cbc48783 type:MM_ANONPAGES val:22 [ 39.194035] ================================================================== [ 39.194962] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.195896] Read of size 8 at addr ffff88800d562ed8 by task sshd/220 [ 39.196674] [ 39.196895] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.197848] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.198821] Call Trace: [ 39.199140] [ 39.199421] dump_stack_lvl+0x91/0xf0 [ 39.199913] print_report+0xcc/0x620 [ 39.200420] ? __virt_addr_valid+0x102/0x340 [ 39.200971] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.201585] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.202200] kasan_report+0xbe/0xf0 [ 39.202676] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.203301] vma_interval_tree_remove+0xc75/0xec0 [ 39.203899] vma_prepare+0xc54/0x11a0 [ 39.204384] __split_vma+0x5af/0x950 [ 39.204860] ? __pfx___split_vma+0x10/0x10 [ 39.205396] ? find_held_lock+0x2c/0x110 [ 39.205916] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.206481] ? lock_is_held_type+0x9f/0x120 [ 39.207024] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.207635] ? mtree_range_walk+0x632/0x900 [ 39.208187] ? mas_walk+0x5c7/0x7c0 [ 39.208682] do_vmi_munmap+0x1f1/0x2b0 [ 39.209182] mmap_region+0x1f9/0x2660 [ 39.209665] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.210176] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.210891] ? __pfx_lock_acquire+0x10/0x10 [ 39.211430] ? __pfx_mmap_region+0x10/0x10 [ 39.211957] ? security_mmap_addr+0x7d/0xa0 [ 39.212508] ? get_unmapped_area+0x1f5/0x3f0 [ 39.213055] do_mmap+0x854/0xf00 [ 39.213494] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.213987] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.214545] ksys_mmap_pgoff+0x3af/0x500 [ 39.215051] do_syscall_64+0x3f/0x90 [ 39.215527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.216175] RIP: 0033:0x7f0bac212d82 [ 39.216637] 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 [ 39.218747] RSP: 002b:00007ffc24614418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.219660] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0bac212d82 [ 39.220516] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0bab64c000 [ 39.221377] RBP: 00007f0bab64c000 R08: 0000000000000009 R09: 0000000000001000 [ 39.222234] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d2fb6d6b20 [ 39.223089] R13: 00007ffc24614430 R14: 00007ffc24614460 R15: 00007ffc246147c0 [ 39.223948] [ 39.224238] [ 39.224479] Allocated by task 213: [ 39.224920] kasan_save_stack+0x22/0x50 [ 39.225423] kasan_set_track+0x25/0x30 [ 39.225927] __kasan_slab_alloc+0x59/0x70 [ 39.226450] kmem_cache_alloc+0x16b/0x370 [ 39.226975] vm_area_dup+0x20/0x160 [ 39.227425] __split_vma+0x170/0x950 [ 39.227904] split_vma+0xc6/0x110 [ 39.228339] mprotect_fixup+0x8d2/0xb30 [ 39.228851] do_mprotect_pkey+0x87e/0xd40 [ 39.229379] __x64_sys_mprotect+0x78/0xc0 [ 39.229902] do_syscall_64+0x3f/0x90 [ 39.230379] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.231027] [ 39.231240] Freed by task 204: [ 39.231636] kasan_save_stack+0x22/0x50 [ 39.232146] kasan_set_track+0x25/0x30 [ 39.232642] kasan_save_free_info+0x2b/0x50 [ 39.233184] __kasan_slab_free+0x10a/0x190 [ 39.233715] kmem_cache_free+0x10d/0x4d0 [ 39.234230] rcu_core+0x8c8/0x2860 [ 39.234683] __do_softirq+0x1b7/0x7d4 [ 39.235159] [ 39.235371] Last potentially related work creation: [ 39.235968] kasan_save_stack+0x22/0x50 [ 39.236487] __kasan_record_aux_stack+0x8e/0xa0 [ 39.237075] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.237724] remove_vma+0x139/0x170 [ 39.238175] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.238729] do_vmi_munmap+0x1f1/0x2b0 [ 39.239215] __vm_munmap+0x138/0x3a0 [ 39.239682] __x64_sys_munmap+0x59/0x80 [ 39.240185] do_syscall_64+0x3f/0x90 [ 39.240666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.241317] [ 39.241535] Second to last potentially related work creation: [ 39.242216] kasan_save_stack+0x22/0x50 [ 39.242716] __kasan_record_aux_stack+0x8e/0xa0 [ 39.243288] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.243932] remove_vma+0x139/0x170 [ 39.244395] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.244958] do_vmi_munmap+0x1f1/0x2b0 [ 39.245441] mmap_region+0x1f9/0x2660 [ 39.245918] do_mmap+0x854/0xf00 [ 39.246348] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.246837] ksys_mmap_pgoff+0x3af/0x500 [ 39.247336] do_syscall_64+0x3f/0x90 [ 39.247810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.248461] [ 39.248683] The buggy address belongs to the object at ffff88800d562e80 [ 39.248683] which belongs to the cache vm_area_struct of size 168 [ 39.250152] The buggy address is located 88 bytes inside of [ 39.250152] freed 168-byte region [ffff88800d562e80, ffff88800d562f28) [ 39.251547] [ 39.251764] The buggy address belongs to the physical page: [ 39.252433] page:00000000bb0e6eb8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd562 [ 39.253515] memcg:ffff88800cff1e01 [ 39.253942] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.254587] page_type: 0xffffffff() [ 39.255038] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 39.255952] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cff1e01 [ 39.256868] page dumped because: kasan: bad access detected [ 39.257526] [ 39.257743] Memory state around the buggy address: [ 39.258320] ffff88800d562d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.259168] ffff88800d562e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 39.260026] >ffff88800d562e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.260879] ^ [ 39.261625] ffff88800d562f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 39.262500] ffff88800d562f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.263344] ================================================================== [ 39.264346] Disabling lock debugging due to kernel taint [ 41.810313] BUG: Bad rss-counter state mm:00000000c56f9206 type:MM_FILEPAGES val:33 [ 41.811520] BUG: Bad rss-counter state mm:00000000c56f9206 type:MM_ANONPAGES val:22 [ 42.212911] BUG: Bad rss-counter state mm:000000008d6bd4e2 type:MM_FILEPAGES val:33 [ 42.213889] BUG: Bad rss-counter state mm:000000008d6bd4e2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28086' (ECDSA) to the list of known hosts. 2023/06/19 19:45:51 fuzzer started 2023/06/19 19:45:51 dialing manager at localhost:44161 2023/06/19 19:45:51 checking machine... 2023/06/19 19:45:51 checking revisions... [ 42.930078] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:45:51 testing simple program... [ 42.973307] cgroup: Unknown subsys name 'net' [ 43.012943] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:45:50 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff81895049 RDX=ffff8880158551c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88801904d1f0 RSP=ffff88801463fa98 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000024 R13=ffffffff856f0b20 R14=ffffffff856f0b20 R15=ffff88801463fc48 RIP=ffffffff814c07eb 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 00007f0b947d1900 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=00007f0b94d86650 CR3=0000000018ce6000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffee2f4ff58 CR3=0000000016e86000 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=2030353a35343a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a35343a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000