syzkaller login: [ 93.600398] BUG: Bad rss-counter state mm:00000000dcda31f6 type:MM_FILEPAGES val:33 [ 93.601581] BUG: Bad rss-counter state mm:00000000dcda31f6 type:MM_ANONPAGES val:22 [ 93.636627] ================================================================== [ 93.637582] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 93.638508] Read of size 8 at addr ffff888019dab880 by task sshd/229 [ 93.639351] [ 93.639584] CPU: 0 PID: 229 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 93.640587] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 93.641547] Call Trace: [ 93.641863] [ 93.642144] dump_stack_lvl+0x91/0xf0 [ 93.642628] print_report+0xcc/0x620 [ 93.643111] ? __virt_addr_valid+0x102/0x340 [ 93.643664] ? vma_interval_tree_remove+0xc75/0xec0 [ 93.644272] ? vma_interval_tree_remove+0xc75/0xec0 [ 93.644881] kasan_report+0xbe/0xf0 [ 93.645372] ? vma_interval_tree_remove+0xc75/0xec0 [ 93.645983] vma_interval_tree_remove+0xc75/0xec0 [ 93.646574] vma_prepare+0xc54/0x11a0 [ 93.647050] __split_vma+0x5af/0x950 [ 93.647544] ? __pfx___split_vma+0x10/0x10 [ 93.648071] ? find_held_lock+0x2c/0x110 [ 93.648592] do_vmi_align_munmap+0x2ba/0x11f0 [ 93.649162] ? lock_is_held_type+0x9f/0x120 [ 93.649698] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 93.650298] ? mtree_range_walk+0x632/0x900 [ 93.650840] ? mas_walk+0x5c7/0x7c0 [ 93.651312] do_vmi_munmap+0x1f1/0x2b0 [ 93.651807] mmap_region+0x1f9/0x2660 [ 93.652289] ? vm_mmap_pgoff+0x15c/0x3a0 [ 93.652799] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 93.653506] ? __pfx_lock_acquire+0x10/0x10 [ 93.654036] ? __pfx_mmap_region+0x10/0x10 [ 93.654559] ? security_mmap_addr+0x7d/0xa0 [ 93.655082] ? get_unmapped_area+0x1f5/0x3f0 [ 93.655632] do_mmap+0x854/0xf00 [ 93.656068] vm_mmap_pgoff+0x1a6/0x3a0 [ 93.656557] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 93.657110] ksys_mmap_pgoff+0x3af/0x500 [ 93.657610] do_syscall_64+0x3f/0x90 [ 93.658083] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 93.658719] RIP: 0033:0x7fbbe5a68d82 [ 93.659170] 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 [ 93.661285] RSP: 002b:00007ffcc35da008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 93.662179] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbbe5a68d82 [ 93.663014] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbbe4ea2000 [ 93.663859] RBP: 00007fbbe4ea2000 R08: 0000000000000009 R09: 0000000000001000 [ 93.664696] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b7ae511ec0 [ 93.665528] R13: 00007ffcc35da020 R14: 00007ffcc35da050 R15: 00007ffcc35da3b0 [ 93.666373] [ 93.666661] [ 93.666873] Allocated by task 222: [ 93.667295] kasan_save_stack+0x22/0x50 [ 93.667806] kasan_set_track+0x25/0x30 [ 93.668300] __kasan_slab_alloc+0x59/0x70 [ 93.668818] kmem_cache_alloc+0x16b/0x370 [ 93.669334] vm_area_dup+0x20/0x160 [ 93.669782] __split_vma+0x170/0x950 [ 93.670246] split_vma+0xc6/0x110 [ 93.670681] mprotect_fixup+0x8d2/0xb30 [ 93.671174] do_mprotect_pkey+0x87e/0xd40 [ 93.671695] __x64_sys_mprotect+0x78/0xc0 [ 93.672206] do_syscall_64+0x3f/0x90 [ 93.672672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 93.673303] [ 93.673517] Freed by task 222: [ 93.673903] kasan_save_stack+0x22/0x50 [ 93.674398] kasan_set_track+0x25/0x30 [ 93.674884] kasan_save_free_info+0x2b/0x50 [ 93.675407] __kasan_slab_free+0x10a/0x190 [ 93.675958] kmem_cache_free+0x10d/0x4d0 [ 93.676460] rcu_core+0x8c8/0x2860 [ 93.676904] __do_softirq+0x1b7/0x7d4 [ 93.677381] [ 93.677594] Last potentially related work creation: [ 93.678172] kasan_save_stack+0x22/0x50 [ 93.678671] __kasan_record_aux_stack+0x8e/0xa0 [ 93.679237] __call_rcu_common.constprop.0+0x6a/0xb90 [ 93.679880] remove_vma+0x139/0x170 [ 93.680329] do_vmi_align_munmap+0xd4a/0x11f0 [ 93.680888] do_vmi_munmap+0x1f1/0x2b0 [ 93.681368] __vm_munmap+0x138/0x3a0 [ 93.681830] __x64_sys_munmap+0x59/0x80 [ 93.682323] do_syscall_64+0x3f/0x90 [ 93.682790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 93.683441] [ 93.683658] The buggy address belongs to the object at ffff888019dab828 [ 93.683658] which belongs to the cache vm_area_struct of size 168 [ 93.685111] The buggy address is located 88 bytes inside of [ 93.685111] freed 168-byte region [ffff888019dab828, ffff888019dab8d0) [ 93.686495] [ 93.686708] The buggy address belongs to the physical page: [ 93.687358] page:00000000d7e6e4d6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19dab [ 93.688442] memcg:ffff888019d9a201 [ 93.688862] flags: 0x100000000000200(slab|node=0|zone=1) [ 93.689508] page_type: 0xffffffff() [ 93.689956] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 93.690858] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d9a201 [ 93.691764] page dumped because: kasan: bad access detected [ 93.692416] [ 93.692629] Memory state around the buggy address: [ 93.693200] ffff888019dab780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 93.694040] ffff888019dab800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 93.694894] >ffff888019dab880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 93.695749] ^ [ 93.696155] ffff888019dab900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 93.697000] ffff888019dab980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 93.697840] ================================================================== [ 93.698958] Disabling lock debugging due to kernel taint [ 95.600826] BUG: Bad rss-counter state mm:00000000724b19a8 type:MM_FILEPAGES val:33 [ 95.602164] BUG: Bad rss-counter state mm:00000000724b19a8 type:MM_ANONPAGES val:22 [ 96.149156] BUG: Bad rss-counter state mm:00000000f7313a00 type:MM_FILEPAGES val:33 [ 96.150345] BUG: Bad rss-counter state mm:00000000f7313a00 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55639' (ECDSA) to the list of known hosts. 2023/06/19 17:24:15 fuzzer started 2023/06/19 17:24:15 dialing manager at localhost:44161 2023/06/19 17:24:15 checking machine... 2023/06/19 17:24:15 checking revisions... [ 96.759607] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:24:16 testing simple program... [ 96.814798] cgroup: Unknown subsys name 'net' [ 96.872663] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:23:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff818cbf16 RDX=1ffff11003353c8d RSI=0000000000000000 RDI=0000000000000000 RBP=ffff888019a9e468 RSP=ffff88801665fd38 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=0000000040500000 R13=ffff888019a9e4f8 R14=ffff888019a9e540 R15=0000000000000000 RIP=ffffffff814c0388 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 00007f35cab9a900 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=00007f497344b000 CR3=00000000145b8000 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=ff0000000000ffff0000000000ff0000 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=00007ffe208738b8 CR3=000000000d072000 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=2035313a34323a3731203931206e754a XMM01=657463656e6e6f63736944203a5d3833 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3833325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a34323a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000