syzkaller login: [ 33.836181] BUG: Bad rss-counter state mm:00000000a5a2373a type:MM_FILEPAGES val:33 [ 33.837421] BUG: Bad rss-counter state mm:00000000a5a2373a type:MM_ANONPAGES val:22 [ 33.874306] ================================================================== [ 33.874927] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.875558] Read of size 8 at addr ffff88800de19140 by task sshd/219 [ 33.875990] [ 33.876128] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.876801] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.877349] Call Trace: [ 33.877525] [ 33.877684] dump_stack_lvl+0x91/0xf0 [ 33.877961] print_report+0xcc/0x620 [ 33.878235] ? __virt_addr_valid+0x102/0x340 [ 33.878539] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.879066] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.879412] kasan_report+0xbe/0xf0 [ 33.879674] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.880012] vma_interval_tree_remove+0xc75/0xec0 [ 33.880348] vma_prepare+0xc54/0x11a0 [ 33.880892] __split_vma+0x5af/0x950 [ 33.881477] ? __pfx___split_vma+0x10/0x10 [ 33.882101] ? find_held_lock+0x2c/0x110 [ 33.882713] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.883390] ? lock_is_held_type+0x9f/0x120 [ 33.884024] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.884784] ? mtree_range_walk+0x632/0x900 [ 33.885460] ? mas_walk+0x5c7/0x7c0 [ 33.886040] do_vmi_munmap+0x1f1/0x2b0 [ 33.886651] mmap_region+0x1f9/0x2660 [ 33.887237] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.887868] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.888770] ? __pfx_lock_acquire+0x10/0x10 [ 33.889384] ? __pfx_mmap_region+0x10/0x10 [ 33.889916] ? security_mmap_addr+0x7d/0xa0 [ 33.890449] ? get_unmapped_area+0x1f5/0x3f0 [ 33.891003] do_mmap+0x854/0xf00 [ 33.891439] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.891937] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.892512] ksys_mmap_pgoff+0x3af/0x500 [ 33.893048] do_syscall_64+0x3f/0x90 [ 33.893525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.894181] RIP: 0033:0x7faa6f45ed82 [ 33.894640] 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 [ 33.896834] RSP: 002b:00007fff3bdd6128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.897740] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faa6f45ed82 [ 33.898588] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faa6e898000 [ 33.899433] RBP: 00007faa6e898000 R08: 0000000000000009 R09: 0000000000001000 [ 33.900279] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ac6860aec0 [ 33.901147] R13: 00007fff3bdd6140 R14: 00007fff3bdd6170 R15: 00007fff3bdd64d0 [ 33.902039] [ 33.902345] [ 33.902566] Allocated by task 212: [ 33.903011] kasan_save_stack+0x22/0x50 [ 33.903540] kasan_set_track+0x25/0x30 [ 33.904056] __kasan_slab_alloc+0x59/0x70 [ 33.904619] kmem_cache_alloc+0x16b/0x370 [ 33.905158] vm_area_dup+0x20/0x160 [ 33.905629] __split_vma+0x170/0x950 [ 33.906118] split_vma+0xc6/0x110 [ 33.906574] mprotect_fixup+0x8d2/0xb30 [ 33.907099] do_mprotect_pkey+0x87e/0xd40 [ 33.907633] __x64_sys_mprotect+0x78/0xc0 [ 33.908175] do_syscall_64+0x3f/0x90 [ 33.908678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.909348] [ 33.909569] Freed by task 212: [ 33.909984] kasan_save_stack+0x22/0x50 [ 33.910508] kasan_set_track+0x25/0x30 [ 33.911022] kasan_save_free_info+0x2b/0x50 [ 33.911582] __kasan_slab_free+0x10a/0x190 [ 33.912142] kmem_cache_free+0x10d/0x4d0 [ 33.912690] rcu_core+0x8c8/0x2860 [ 33.913149] __do_softirq+0x1b7/0x7d4 [ 33.913650] [ 33.913871] Last potentially related work creation: [ 33.914481] kasan_save_stack+0x22/0x50 [ 33.915007] __kasan_record_aux_stack+0x8e/0xa0 [ 33.915605] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.916276] remove_vma+0x139/0x170 [ 33.916760] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.917341] do_vmi_munmap+0x1f1/0x2b0 [ 33.917852] __vm_munmap+0x138/0x3a0 [ 33.918336] __x64_sys_munmap+0x59/0x80 [ 33.918855] do_syscall_64+0x3f/0x90 [ 33.919352] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.920026] [ 33.920249] The buggy address belongs to the object at ffff88800de190e8 [ 33.920249] which belongs to the cache vm_area_struct of size 168 [ 33.921810] The buggy address is located 88 bytes inside of [ 33.921810] freed 168-byte region [ffff88800de190e8, ffff88800de19190) [ 33.923280] [ 33.923507] The buggy address belongs to the physical page: [ 33.924195] page:000000007c60c31d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde19 [ 33.925342] memcg:ffff88800dde6e01 [ 33.925792] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.926519] page_type: 0xffffffff() [ 33.926991] raw: 0100000000000200 ffff88800879fc80 ffffea00003d2840 dead000000000005 [ 33.927946] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dde6e01 [ 33.928914] page dumped because: kasan: bad access detected [ 33.929603] [ 33.929828] Memory state around the buggy address: [ 33.930440] ffff88800de19000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.931338] ffff88800de19080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 33.932240] >ffff88800de19100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.933153] ^ [ 33.933823] ffff88800de19180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 33.934713] ffff88800de19200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 33.935600] ================================================================== [ 33.936861] Disabling lock debugging due to kernel taint [ 35.843996] BUG: Bad rss-counter state mm:00000000bcbc435f type:MM_FILEPAGES val:33 [ 35.844997] BUG: Bad rss-counter state mm:00000000bcbc435f type:MM_ANONPAGES val:22 [ 36.394930] BUG: Bad rss-counter state mm:000000006b23bcb0 type:MM_FILEPAGES val:33 [ 36.396140] BUG: Bad rss-counter state mm:000000006b23bcb0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52445' (ECDSA) to the list of known hosts. 2023/06/20 06:19:45 fuzzer started 2023/06/20 06:19:45 dialing manager at localhost:44161 2023/06/20 06:19:45 checking machine... 2023/06/20 06:19:45 checking revisions... [ 37.022796] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:19:46 testing simple program... [ 37.072054] cgroup: Unknown subsys name 'net' [ 37.118273] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:19:42 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=00007f9e1ca2a080 CR3=000000000c592000 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=2035343a39313a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a39313a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff83634883 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110028eaf1a RSI=ffff888014757e28 RDI=ffffffff83634883 RBP=ffff8880147578d0 RSP=ffff888014757868 R8 =0000000000000001 R9 =ffff8880147578b8 R10=0000000000038001 R11=00000000000229dc R12=ffff888014757940 R13=0000000000000000 R14=ffff888016f29b40 R15=0000000000092cc0 RIP=ffffffff811303b9 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 00007f1fa98c4900 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=00007ffdb0ec4000 CR3=000000001c9b6000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000