syzkaller login: [ 31.593061] BUG: Bad rss-counter state mm:000000000da0b2de type:MM_FILEPAGES val:33 [ 31.594521] BUG: Bad rss-counter state mm:000000000da0b2de type:MM_ANONPAGES val:22 [ 31.765268] ================================================================== [ 31.766431] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.767721] Read of size 8 at addr ffff888015dca880 by task sshd/220 [ 31.768559] [ 31.768793] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.769752] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.770807] Call Trace: [ 31.771152] [ 31.771453] dump_stack_lvl+0x91/0xf0 [ 31.771975] print_report+0xcc/0x620 [ 31.772501] ? __virt_addr_valid+0x102/0x340 [ 31.773091] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.773745] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.774394] kasan_report+0xbe/0xf0 [ 31.774894] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.775538] vma_interval_tree_remove+0xc75/0xec0 [ 31.776172] vma_prepare+0xc54/0x11a0 [ 31.776689] __split_vma+0x5af/0x950 [ 31.777183] ? __pfx___split_vma+0x10/0x10 [ 31.777731] ? find_held_lock+0x2c/0x110 [ 31.778279] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.778863] ? lock_is_held_type+0x9f/0x120 [ 31.779427] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.780072] ? mtree_range_walk+0x632/0x900 [ 31.780664] ? mas_walk+0x5c7/0x7c0 [ 31.781163] do_vmi_munmap+0x1f1/0x2b0 [ 31.781679] mmap_region+0x1f9/0x2660 [ 31.782186] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.782740] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.783489] ? __pfx_lock_acquire+0x10/0x10 [ 31.784069] ? __pfx_mmap_region+0x10/0x10 [ 31.784641] ? security_mmap_addr+0x7d/0xa0 [ 31.785208] ? get_unmapped_area+0x1f5/0x3f0 [ 31.785792] do_mmap+0x854/0xf00 [ 31.786255] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.786780] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.787385] ksys_mmap_pgoff+0x3af/0x500 [ 31.787917] do_syscall_64+0x3f/0x90 [ 31.788428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.789109] RIP: 0033:0x7f9f212e1d82 [ 31.789593] 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 [ 31.791811] RSP: 002b:00007ffdc8d2e378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.792761] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9f212e1d82 [ 31.793660] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9f2071b000 [ 31.794548] RBP: 00007f9f2071b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.795451] R10: 0000000000000812 R11: 0000000000000206 R12: 000055de41131ec0 [ 31.796343] R13: 00007ffdc8d2e390 R14: 00007ffdc8d2e3c0 R15: 00007ffdc8d2e720 [ 31.797256] [ 31.797574] [ 31.797810] Allocated by task 213: [ 31.798271] kasan_save_stack+0x22/0x50 [ 31.798808] kasan_set_track+0x25/0x30 [ 31.799326] __kasan_slab_alloc+0x59/0x70 [ 31.799879] kmem_cache_alloc+0x16b/0x370 [ 31.800436] vm_area_dup+0x20/0x160 [ 31.800918] __split_vma+0x170/0x950 [ 31.801411] split_vma+0xc6/0x110 [ 31.801874] mprotect_fixup+0x8d2/0xb30 [ 31.802406] do_mprotect_pkey+0x87e/0xd40 [ 31.802954] __x64_sys_mprotect+0x78/0xc0 [ 31.803510] do_syscall_64+0x3f/0x90 [ 31.804015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.804701] [ 31.804925] Freed by task 213: [ 31.805336] kasan_save_stack+0x22/0x50 [ 31.805860] kasan_set_track+0x25/0x30 [ 31.806377] kasan_save_free_info+0x2b/0x50 [ 31.806937] __kasan_slab_free+0x10a/0x190 [ 31.807490] kmem_cache_free+0x10d/0x4d0 [ 31.808030] rcu_core+0x8c8/0x2860 [ 31.808506] __do_softirq+0x1b7/0x7d4 [ 31.809005] [ 31.809223] Last potentially related work creation: [ 31.809840] kasan_save_stack+0x22/0x50 [ 31.810368] __kasan_record_aux_stack+0x8e/0xa0 [ 31.810975] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.811658] remove_vma+0x139/0x170 [ 31.812127] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.812715] do_vmi_munmap+0x1f1/0x2b0 [ 31.813225] __vm_munmap+0x138/0x3a0 [ 31.813718] __x64_sys_munmap+0x59/0x80 [ 31.814235] do_syscall_64+0x3f/0x90 [ 31.814727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.815407] [ 31.815637] Second to last potentially related work creation: [ 31.816359] kasan_save_stack+0x22/0x50 [ 31.816884] __kasan_record_aux_stack+0x8e/0xa0 [ 31.817491] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.818149] remove_vma+0x139/0x170 [ 31.818619] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.819203] do_vmi_munmap+0x1f1/0x2b0 [ 31.819709] __vm_munmap+0x138/0x3a0 [ 31.820193] __x64_sys_munmap+0x59/0x80 [ 31.820729] do_syscall_64+0x3f/0x90 [ 31.821228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.821897] [ 31.822118] The buggy address belongs to the object at ffff888015dca828 [ 31.822118] which belongs to the cache vm_area_struct of size 168 [ 31.823643] The buggy address is located 88 bytes inside of [ 31.823643] freed 168-byte region [ffff888015dca828, ffff888015dca8d0) [ 31.825072] [ 31.825292] The buggy address belongs to the physical page: [ 31.825958] page:00000000f68391c2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15dca [ 31.827075] memcg:ffff888016b56501 [ 31.827510] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.828161] page_type: 0xffffffff() [ 31.828641] raw: 0100000000000200 ffff88800879fc80 ffffea0000675440 dead000000000006 [ 31.829567] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b56501 [ 31.830535] page dumped because: kasan: bad access detected [ 31.831201] [ 31.831422] Memory state around the buggy address: [ 31.832012] ffff888015dca780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.832895] ffff888015dca800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.833768] >ffff888015dca880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.834629] ^ [ 31.835051] ffff888015dca900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.835926] ffff888015dca980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.836809] ================================================================== [ 31.837887] Disabling lock debugging due to kernel taint [ 33.732570] BUG: Bad rss-counter state mm:000000001a66252e type:MM_FILEPAGES val:33 [ 33.733577] BUG: Bad rss-counter state mm:000000001a66252e type:MM_ANONPAGES val:22 [ 34.195778] BUG: Bad rss-counter state mm:00000000691ddbce type:MM_FILEPAGES val:33 [ 34.196845] BUG: Bad rss-counter state mm:00000000691ddbce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54193' (ECDSA) to the list of known hosts. 2023/06/20 03:10:20 fuzzer started 2023/06/20 03:10:20 dialing manager at localhost:44161 2023/06/20 03:10:20 checking machine... 2023/06/20 03:10:20 checking revisions... [ 34.916806] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:10:20 testing simple program... [ 34.975872] cgroup: Unknown subsys name 'net' [ 35.013893] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:10:19 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=00007fb2c8eef350 CR3=000000000e25e000 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=2039313a30313a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a30313a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007f3641b3f008 RBX=00007f3641b3ed10 RCX=0000000000000002 RDX=00007f364213b878 RSI=0000000000000002 RDI=00007f3641b3f008 RBP=00007ffd07bb77e0 RSP=00007ffd07bb77e0 R8 =000055eea38340d0 R9 =0000000000000000 R10=0000000000000003 R11=0000000200000000 R12=000055eea3854880 R13=0000000000000021 R14=0000000000000020 R15=0000000000000000 RIP=00007f3641b3c21f RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3641b86900 00000000 00000000 GS =0000 0000000000000000 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=00007f3641b3f008 CR3=000000000e5b2000 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