syzkaller login: [ 30.258436] BUG: Bad rss-counter state mm:0000000014157074 type:MM_FILEPAGES val:33 [ 30.259731] BUG: Bad rss-counter state mm:0000000014157074 type:MM_ANONPAGES val:22 [ 30.330222] ================================================================== [ 30.331387] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.332879] Read of size 8 at addr ffff88800e343880 by task sshd/219 [ 30.333883] [ 30.334179] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.335300] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.336565] Call Trace: [ 30.336976] [ 30.337333] dump_stack_lvl+0x91/0xf0 [ 30.337971] print_report+0xcc/0x620 [ 30.338588] ? __virt_addr_valid+0x102/0x340 [ 30.339286] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.340094] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.340876] kasan_report+0xbe/0xf0 [ 30.341479] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.342279] vma_interval_tree_remove+0xc75/0xec0 [ 30.342948] vma_prepare+0xc54/0x11a0 [ 30.343453] __split_vma+0x5af/0x950 [ 30.343974] ? __pfx___split_vma+0x10/0x10 [ 30.344536] ? find_held_lock+0x2c/0x110 [ 30.345080] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.345675] ? lock_is_held_type+0x9f/0x120 [ 30.346236] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.346871] ? mtree_range_walk+0x632/0x900 [ 30.347456] ? mas_walk+0x5c7/0x7c0 [ 30.347971] do_vmi_munmap+0x1f1/0x2b0 [ 30.348487] mmap_region+0x1f9/0x2660 [ 30.348994] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.349535] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.350295] ? __pfx_lock_acquire+0x10/0x10 [ 30.350856] ? __pfx_mmap_region+0x10/0x10 [ 30.351410] ? security_mmap_addr+0x7d/0xa0 [ 30.351989] ? get_unmapped_area+0x1f5/0x3f0 [ 30.352562] do_mmap+0x854/0xf00 [ 30.353022] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.353547] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.354134] ksys_mmap_pgoff+0x3af/0x500 [ 30.354663] do_syscall_64+0x3f/0x90 [ 30.355159] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.355844] RIP: 0033:0x7f9d06971d82 [ 30.356323] 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 [ 30.358570] RSP: 002b:00007ffd9eae8698 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.359510] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9d06971d82 [ 30.360415] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9d05dab000 [ 30.361301] RBP: 00007f9d05dab000 R08: 0000000000000009 R09: 0000000000001000 [ 30.362183] R10: 0000000000000812 R11: 0000000000000206 R12: 00005608df6b1d90 [ 30.363058] R13: 00007ffd9eae86b0 R14: 00007ffd9eae86e0 R15: 00007ffd9eae8a40 [ 30.363970] [ 30.364275] [ 30.364499] Allocated by task 212: [ 30.364939] kasan_save_stack+0x22/0x50 [ 30.365460] kasan_set_track+0x25/0x30 [ 30.365972] __kasan_slab_alloc+0x59/0x70 [ 30.366523] kmem_cache_alloc+0x16b/0x370 [ 30.367052] vm_area_dup+0x20/0x160 [ 30.367522] __split_vma+0x170/0x950 [ 30.368019] split_vma+0xc6/0x110 [ 30.368477] mprotect_fixup+0x8d2/0xb30 [ 30.368999] do_mprotect_pkey+0x87e/0xd40 [ 30.369541] __x64_sys_mprotect+0x78/0xc0 [ 30.370075] do_syscall_64+0x3f/0x90 [ 30.370566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.371230] [ 30.371452] Freed by task 210: [ 30.371877] kasan_save_stack+0x22/0x50 [ 30.372397] kasan_set_track+0x25/0x30 [ 30.372906] kasan_save_free_info+0x2b/0x50 [ 30.373456] __kasan_slab_free+0x10a/0x190 [ 30.373997] kmem_cache_free+0x10d/0x4d0 [ 30.374519] rcu_core+0x8c8/0x2860 [ 30.374975] __do_softirq+0x1b7/0x7d4 [ 30.375461] [ 30.375686] Last potentially related work creation: [ 30.376288] kasan_save_stack+0x22/0x50 [ 30.376808] __kasan_record_aux_stack+0x8e/0xa0 [ 30.377406] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.378059] remove_vma+0x139/0x170 [ 30.378523] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.379097] do_vmi_munmap+0x1f1/0x2b0 [ 30.379617] __vm_munmap+0x138/0x3a0 [ 30.380097] __x64_sys_munmap+0x59/0x80 [ 30.380612] do_syscall_64+0x3f/0x90 [ 30.381095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.381761] [ 30.381980] The buggy address belongs to the object at ffff88800e343828 [ 30.381980] which belongs to the cache vm_area_struct of size 168 [ 30.383492] The buggy address is located 88 bytes inside of [ 30.383492] freed 168-byte region [ffff88800e343828, ffff88800e3438d0) [ 30.384957] [ 30.385181] The buggy address belongs to the physical page: [ 30.385853] page:00000000d9818fa5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe343 [ 30.386955] memcg:ffff88800d9e8301 [ 30.387393] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.388129] page_type: 0xffffffff() [ 30.388589] raw: 0100000000000200 ffff8880087a0c80 ffffea0000385700 dead000000000003 [ 30.389532] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9e8301 [ 30.390462] page dumped because: kasan: bad access detected [ 30.391139] [ 30.391362] Memory state around the buggy address: [ 30.391977] ffff88800e343780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.392867] ffff88800e343800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.393758] >ffff88800e343880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.394652] ^ [ 30.395079] ffff88800e343900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.395978] ffff88800e343980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.396844] ================================================================== [ 30.398008] Disabling lock debugging due to kernel taint [ 32.532735] BUG: Bad rss-counter state mm:000000009c087f9c type:MM_FILEPAGES val:33 [ 32.533899] BUG: Bad rss-counter state mm:000000009c087f9c type:MM_ANONPAGES val:22 [ 33.070865] BUG: Bad rss-counter state mm:000000001b501152 type:MM_FILEPAGES val:33 [ 33.071974] BUG: Bad rss-counter state mm:000000001b501152 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16938' (ECDSA) to the list of known hosts. 2023/06/21 04:32:48 fuzzer started 2023/06/21 04:32:49 dialing manager at localhost:36067 2023/06/21 04:32:49 checking machine... 2023/06/21 04:32:49 checking revisions... [ 33.750135] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:32:49 testing simple program... [ 33.804668] cgroup: Unknown subsys name 'net' [ 33.868278] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:32:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008d9fa40 RCX=0000000000000001 RDX=1ffff110011b3f4a RSI=ffffffff8100455c RDI=ffff888008d9fa50 RBP=ffff888008d9fa10 RSP=ffff888008d9f958 R8 =0000000000000001 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000009bf7 R12=ffff888008d9fa40 R13=0000000000000000 R14=ffff888008d90000 R15=ffff888009902a00 RIP=ffffffff813ad496 RFL=00000292 [--S-A--] 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 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=00007ffda1418278 CR3=0000000005482000 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=00007ff57e9f45100000562fb9970790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888099e60d90 RCX=0000000000000100 RDX=ffff888008e0d1c0 RSI=ffffffff81143144 RDI=0000000000000006 RBP=0000000019e60d90 RSP=ffff888008e37c58 R8 =0000000000000006 R9 =ffff888099e60d90 R10=0000000019e60d90 R11=0000000000000128 R12=0000000000000000 R13=ffffea0000640280 R14=ffffffff813782f8 R15=ffff88800d1fb780 RIP=ffffffff814c0891 RFL=00000206 [-----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 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=00007febd900fc90 CR3=000000000cab6000 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=2038343a32333a3430203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a32333a3430203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000