syzkaller login: [ 23.714692] BUG: Bad rss-counter state mm:00000000f0684831 type:MM_FILEPAGES val:33 [ 23.715720] BUG: Bad rss-counter state mm:00000000f0684831 type:MM_ANONPAGES val:22 [ 23.876014] ================================================================== [ 23.876990] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.878160] Read of size 8 at addr ffff88800edb35c8 by task sshd/219 [ 23.878949] [ 23.879170] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.880085] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.881096] Call Trace: [ 23.881421] [ 23.881712] dump_stack_lvl+0x91/0xf0 [ 23.882215] print_report+0xcc/0x620 [ 23.882713] ? __virt_addr_valid+0x102/0x340 [ 23.883273] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.883898] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.884524] kasan_report+0xbe/0xf0 [ 23.885015] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.885662] vma_interval_tree_remove+0xc75/0xec0 [ 23.886277] vma_prepare+0xc54/0x11a0 [ 23.886770] __split_vma+0x5af/0x950 [ 23.887253] ? __pfx___split_vma+0x10/0x10 [ 23.887799] ? find_held_lock+0x2c/0x110 [ 23.888334] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.888924] ? lock_is_held_type+0x9f/0x120 [ 23.889488] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.890114] ? mtree_range_walk+0x632/0x900 [ 23.890684] ? mas_walk+0x5c7/0x7c0 [ 23.891182] do_vmi_munmap+0x1f1/0x2b0 [ 23.891697] mmap_region+0x1f9/0x2660 [ 23.892188] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.892727] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.893478] ? __pfx_lock_acquire+0x10/0x10 [ 23.894025] ? __pfx_mmap_region+0x10/0x10 [ 23.894569] ? security_mmap_addr+0x7d/0xa0 [ 23.895118] ? get_unmapped_area+0x1f5/0x3f0 [ 23.895678] do_mmap+0x854/0xf00 [ 23.896124] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.896632] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.897213] ksys_mmap_pgoff+0x3af/0x500 [ 23.897729] do_syscall_64+0x3f/0x90 [ 23.898217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.898876] RIP: 0033:0x7f3cf3290d82 [ 23.899340] 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 [ 23.901549] RSP: 002b:00007ffc3940dc88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.902473] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3cf3290d82 [ 23.903361] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3cf26ca000 [ 23.904227] RBP: 00007f3cf26ca000 R08: 0000000000000009 R09: 0000000000001000 [ 23.905105] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b05580b20 [ 23.905975] R13: 00007ffc3940dca0 R14: 00007ffc3940dcd0 R15: 00007ffc3940e030 [ 23.906851] [ 23.907144] [ 23.907361] Allocated by task 212: [ 23.907804] kasan_save_stack+0x22/0x50 [ 23.908319] kasan_set_track+0x25/0x30 [ 23.908820] __kasan_slab_alloc+0x59/0x70 [ 23.909366] kmem_cache_alloc+0x16b/0x370 [ 23.909899] vm_area_dup+0x20/0x160 [ 23.910374] __split_vma+0x170/0x950 [ 23.910854] split_vma+0xc6/0x110 [ 23.911307] mprotect_fixup+0x8d2/0xb30 [ 23.911818] do_mprotect_pkey+0x87e/0xd40 [ 23.912359] __x64_sys_mprotect+0x78/0xc0 [ 23.912889] do_syscall_64+0x3f/0x90 [ 23.913397] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.914056] [ 23.914280] Freed by task 19: [ 23.914669] kasan_save_stack+0x22/0x50 [ 23.915180] kasan_set_track+0x25/0x30 [ 23.915681] kasan_save_free_info+0x2b/0x50 [ 23.916216] __kasan_slab_free+0x10a/0x190 [ 23.916761] kmem_cache_free+0x10d/0x4d0 [ 23.917288] rcu_core+0x8c8/0x2860 [ 23.917741] __do_softirq+0x1b7/0x7d4 [ 23.918237] [ 23.918453] Last potentially related work creation: [ 23.919052] kasan_save_stack+0x22/0x50 [ 23.919566] __kasan_record_aux_stack+0x8e/0xa0 [ 23.920156] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.920815] remove_vma+0x139/0x170 [ 23.921299] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.921874] do_vmi_munmap+0x1f1/0x2b0 [ 23.922371] __vm_munmap+0x138/0x3a0 [ 23.922851] __x64_sys_munmap+0x59/0x80 [ 23.923361] do_syscall_64+0x3f/0x90 [ 23.923848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.924512] [ 23.924729] The buggy address belongs to the object at ffff88800edb3570 [ 23.924729] which belongs to the cache vm_area_struct of size 168 [ 23.926227] The buggy address is located 88 bytes inside of [ 23.926227] freed 168-byte region [ffff88800edb3570, ffff88800edb3618) [ 23.927687] [ 23.927907] The buggy address belongs to the physical page: [ 23.928578] page:000000000cc4917d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedb3 [ 23.929685] memcg:ffff88800e70dc01 [ 23.930108] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.930754] page_type: 0xffffffff() [ 23.931202] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.932116] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e70dc01 [ 23.933013] page dumped because: kasan: bad access detected [ 23.933688] [ 23.933901] Memory state around the buggy address: [ 23.934478] ffff88800edb3480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.935334] ffff88800edb3500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 23.936207] >ffff88800edb3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.937061] ^ [ 23.937722] ffff88800edb3600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 23.938573] ffff88800edb3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.939408] ================================================================== [ 23.940675] Disabling lock debugging due to kernel taint [ 26.369306] BUG: Bad rss-counter state mm:000000008ebc1d69 type:MM_FILEPAGES val:33 [ 26.370301] BUG: Bad rss-counter state mm:000000008ebc1d69 type:MM_ANONPAGES val:22 [ 26.854589] BUG: Bad rss-counter state mm:0000000007e7e165 type:MM_FILEPAGES val:33 [ 26.855757] BUG: Bad rss-counter state mm:0000000007e7e165 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6697' (ECDSA) to the list of known hosts. 2023/06/21 05:59:29 fuzzer started 2023/06/21 05:59:30 dialing manager at localhost:36067 2023/06/21 05:59:30 checking machine... 2023/06/21 05:59:30 checking revisions... [ 27.594433] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:59:30 testing simple program... [ 27.638391] cgroup: Unknown subsys name 'net' [ 27.676252] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:59:29 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000009 RCX=0000000000000100 RDX=ffff888006b53680 RSI=ffffffff813782e4 RDI=ffffffff8560b520 RBP=000000000000000a RSP=ffff88806ce09da0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6d53 R12=ffffffff8560b520 R13=ffffffff813782e4 R14=ffff88806ce35000 R15=ffff88800c55c780 RIP=ffffffff812d867e RFL=00000286 [--S--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f12cd7d8900 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=00007f12ccc294b0 CR3=000000000cc76000 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=64657669656365523d4547415353454d XMM01=332074726f7020322e322e302e303120 XMM02=63736964203a31313a32343038332074 XMM03=66207463656e6e6f6373696420646576 XMM04=2cbd854aca35d4ba00000000000ae988 XMM05=1319e678c5640f8a0000000000132dc0 XMM06=e8008b1642ea3e600000000000132d28 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=0000000000000001 RSI=ffffffff818080db RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000021eef R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff811306ec 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 00007f638647c700 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=00007ffd2ee37000 CR3=0000000016c76000 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=2039323a39353a3530203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a39353a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000