syzkaller login: [ 60.229244] BUG: Bad rss-counter state mm:000000008087fbc5 type:MM_FILEPAGES val:33 [ 60.230439] BUG: Bad rss-counter state mm:000000008087fbc5 type:MM_ANONPAGES val:22 [ 60.374677] ================================================================== [ 60.375578] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.376510] Read of size 8 at addr ffff888009ee4b38 by task sshd/220 [ 60.377269] [ 60.377486] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.378504] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.379473] Call Trace: [ 60.379791] [ 60.380098] dump_stack_lvl+0x91/0xf0 [ 60.380590] print_report+0xcc/0x620 [ 60.381085] ? __virt_addr_valid+0x102/0x340 [ 60.381637] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.382259] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.382879] kasan_report+0xbe/0xf0 [ 60.383349] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.383973] vma_interval_tree_remove+0xc75/0xec0 [ 60.384579] vma_prepare+0xc54/0x11a0 [ 60.385063] __split_vma+0x5af/0x950 [ 60.385534] ? __pfx___split_vma+0x10/0x10 [ 60.386089] ? find_held_lock+0x2c/0x110 [ 60.386609] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.387180] ? lock_is_held_type+0x9f/0x120 [ 60.387714] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.388325] ? mtree_range_walk+0x632/0x900 [ 60.388881] ? mas_walk+0x5c7/0x7c0 [ 60.389356] do_vmi_munmap+0x1f1/0x2b0 [ 60.389841] mmap_region+0x1f9/0x2660 [ 60.390328] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.390846] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.391562] ? __pfx_lock_acquire+0x10/0x10 [ 60.392113] ? __pfx_mmap_region+0x10/0x10 [ 60.392699] ? security_mmap_addr+0x7d/0xa0 [ 60.393284] ? get_unmapped_area+0x1f5/0x3f0 [ 60.393876] do_mmap+0x854/0xf00 [ 60.394361] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.394895] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.395504] ksys_mmap_pgoff+0x3af/0x500 [ 60.396055] do_syscall_64+0x3f/0x90 [ 60.396564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.397266] RIP: 0033:0x7f9fe6bebd82 [ 60.397763] 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 [ 60.400099] RSP: 002b:00007ffd5e1908e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.401093] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9fe6bebd82 [ 60.402030] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9fe6025000 [ 60.402945] RBP: 00007f9fe6025000 R08: 0000000000000009 R09: 0000000000001000 [ 60.403868] R10: 0000000000000812 R11: 0000000000000206 R12: 000055908b065ec0 [ 60.404797] R13: 00007ffd5e190900 R14: 00007ffd5e190930 R15: 00007ffd5e190c90 [ 60.405733] [ 60.406060] [ 60.406284] Allocated by task 213: [ 60.406749] kasan_save_stack+0x22/0x50 [ 60.407293] kasan_set_track+0x25/0x30 [ 60.407825] __kasan_slab_alloc+0x59/0x70 [ 60.408392] kmem_cache_alloc+0x16b/0x370 [ 60.408951] vm_area_dup+0x20/0x160 [ 60.409438] __split_vma+0x170/0x950 [ 60.409940] split_vma+0xc6/0x110 [ 60.410428] mprotect_fixup+0x8d2/0xb30 [ 60.410973] do_mprotect_pkey+0x87e/0xd40 [ 60.411531] __x64_sys_mprotect+0x78/0xc0 [ 60.412102] do_syscall_64+0x3f/0x90 [ 60.412609] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.413311] [ 60.413541] Freed by task 13: [ 60.413952] kasan_save_stack+0x22/0x50 [ 60.414507] kasan_set_track+0x25/0x30 [ 60.415048] kasan_save_free_info+0x2b/0x50 [ 60.415626] __kasan_slab_free+0x10a/0x190 [ 60.416199] kmem_cache_free+0x10d/0x4d0 [ 60.416742] rcu_core+0x8c8/0x2860 [ 60.417224] __do_softirq+0x1b7/0x7d4 [ 60.417741] [ 60.417990] Last potentially related work creation: [ 60.418676] kasan_save_stack+0x22/0x50 [ 60.419223] __kasan_record_aux_stack+0x8e/0xa0 [ 60.419846] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.420533] remove_vma+0x139/0x170 [ 60.421019] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.421626] do_vmi_munmap+0x1f1/0x2b0 [ 60.422162] __vm_munmap+0x138/0x3a0 [ 60.422670] __x64_sys_munmap+0x59/0x80 [ 60.423206] do_syscall_64+0x3f/0x90 [ 60.423717] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.424410] [ 60.424640] The buggy address belongs to the object at ffff888009ee4ae0 [ 60.424640] which belongs to the cache vm_area_struct of size 168 [ 60.426248] The buggy address is located 88 bytes inside of [ 60.426248] freed 168-byte region [ffff888009ee4ae0, ffff888009ee4b88) [ 60.427776] [ 60.428006] The buggy address belongs to the physical page: [ 60.428720] page:00000000de3d475f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9ee4 [ 60.429888] memcg:ffff88800edf2401 [ 60.430327] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.430939] page_type: 0xffffffff() [ 60.431368] raw: 0100000000000200 ffff8880087a0c80 ffffea00002548c0 dead000000000006 [ 60.432230] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edf2401 [ 60.433079] page dumped because: kasan: bad access detected [ 60.433701] [ 60.433908] Memory state around the buggy address: [ 60.434465] ffff888009ee4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.435273] ffff888009ee4a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 60.436070] >ffff888009ee4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.436862] ^ [ 60.437441] ffff888009ee4b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 60.438262] ffff888009ee4c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 60.439061] ================================================================== [ 60.439936] Disabling lock debugging due to kernel taint [ 62.686680] BUG: Bad rss-counter state mm:00000000ee74f4f5 type:MM_FILEPAGES val:33 [ 62.687621] BUG: Bad rss-counter state mm:00000000ee74f4f5 type:MM_ANONPAGES val:22 [ 63.204049] BUG: Bad rss-counter state mm:000000000d6aaf3d type:MM_FILEPAGES val:33 [ 63.205243] BUG: Bad rss-counter state mm:000000000d6aaf3d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29812' (ECDSA) to the list of known hosts. 2023/06/20 23:55:14 fuzzer started 2023/06/20 23:55:15 dialing manager at localhost:36067 2023/06/20 23:55:15 checking machine... 2023/06/20 23:55:15 checking revisions... [ 63.919218] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:55:15 testing simple program... [ 63.961074] cgroup: Unknown subsys name 'net' [ 64.015569] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:55:14 Registers: info registers vcpu 0 RAX=ffffed100327cc98 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffff8880193e64c0 RDI=00000000000004d8 RBP=ffffffff818d9c06 RSP=ffff88806ce09de0 R8 =0000000000000540 R9 =0000000000000000 R10=ffffed100327cc98 R11=00000000000b6a61 R12=ffff8880193e64c0 R13=ffff8880087c9280 R14=ffffffff818d9c06 R15=ffff88800db33680 RIP=ffffffff8180f59b 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 00007f9122a92900 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=00007ffc8af73000 CR3=000000000efc8000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fede2fdc5e0 CR3=00000000094e6000 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=2034313a35353a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a35353a3332203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000