syzkaller login: [ 31.248697] BUG: Bad rss-counter state mm:000000003cb2e0f1 type:MM_FILEPAGES val:33 [ 31.250156] BUG: Bad rss-counter state mm:000000003cb2e0f1 type:MM_ANONPAGES val:22 [ 31.394790] ================================================================== [ 31.395702] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.396655] Read of size 8 at addr ffff8880140f75c8 by task sshd/220 [ 31.397438] [ 31.397657] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.398680] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.399674] Call Trace: [ 31.399994] [ 31.400324] dump_stack_lvl+0x91/0xf0 [ 31.400840] print_report+0xcc/0x620 [ 31.401337] ? __virt_addr_valid+0x102/0x340 [ 31.401896] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.402523] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.403147] kasan_report+0xbe/0xf0 [ 31.403633] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.404260] vma_interval_tree_remove+0xc75/0xec0 [ 31.404888] vma_prepare+0xc54/0x11a0 [ 31.405367] __split_vma+0x5af/0x950 [ 31.405840] ? __pfx___split_vma+0x10/0x10 [ 31.406378] ? find_held_lock+0x2c/0x110 [ 31.406898] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.407461] ? lock_is_held_type+0x9f/0x120 [ 31.407998] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.408601] ? mtree_range_walk+0x632/0x900 [ 31.409170] ? mas_walk+0x5c7/0x7c0 [ 31.409651] do_vmi_munmap+0x1f1/0x2b0 [ 31.410158] mmap_region+0x1f9/0x2660 [ 31.410640] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.411159] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.411878] ? __pfx_lock_acquire+0x10/0x10 [ 31.412426] ? __pfx_mmap_region+0x10/0x10 [ 31.412963] ? security_mmap_addr+0x7d/0xa0 [ 31.413504] ? get_unmapped_area+0x1f5/0x3f0 [ 31.414054] do_mmap+0x854/0xf00 [ 31.414497] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.414991] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.415555] ksys_mmap_pgoff+0x3af/0x500 [ 31.416063] do_syscall_64+0x3f/0x90 [ 31.416539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.417204] RIP: 0033:0x7fac64973d82 [ 31.417662] 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 [ 31.419814] RSP: 002b:00007ffd2e2b96d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.420727] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac64973d82 [ 31.421582] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac63dad000 [ 31.422440] RBP: 00007fac63dad000 R08: 0000000000000009 R09: 0000000000001000 [ 31.423287] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557b88031ec0 [ 31.424141] R13: 00007ffd2e2b96f0 R14: 00007ffd2e2b9720 R15: 00007ffd2e2b9a80 [ 31.425022] [ 31.425331] [ 31.425556] Allocated by task 213: [ 31.425984] kasan_save_stack+0x22/0x50 [ 31.426494] kasan_set_track+0x25/0x30 [ 31.426986] __kasan_slab_alloc+0x59/0x70 [ 31.427517] kmem_cache_alloc+0x16b/0x370 [ 31.428039] vm_area_dup+0x20/0x160 [ 31.428509] __split_vma+0x170/0x950 [ 31.429000] split_vma+0xc6/0x110 [ 31.429451] mprotect_fixup+0x8d2/0xb30 [ 31.429951] do_mprotect_pkey+0x87e/0xd40 [ 31.430479] __x64_sys_mprotect+0x78/0xc0 [ 31.431009] do_syscall_64+0x3f/0x90 [ 31.431489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.432137] [ 31.432359] Freed by task 213: [ 31.432747] kasan_save_stack+0x22/0x50 [ 31.433274] kasan_set_track+0x25/0x30 [ 31.433778] kasan_save_free_info+0x2b/0x50 [ 31.434312] __kasan_slab_free+0x10a/0x190 [ 31.434851] kmem_cache_free+0x10d/0x4d0 [ 31.435364] rcu_core+0x8c8/0x2860 [ 31.435812] __do_softirq+0x1b7/0x7d4 [ 31.436304] [ 31.436524] Last potentially related work creation: [ 31.437134] kasan_save_stack+0x22/0x50 [ 31.437641] __kasan_record_aux_stack+0x8e/0xa0 [ 31.438227] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.438882] remove_vma+0x139/0x170 [ 31.439338] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.439912] do_vmi_munmap+0x1f1/0x2b0 [ 31.440410] __vm_munmap+0x138/0x3a0 [ 31.440883] __x64_sys_munmap+0x59/0x80 [ 31.441397] do_syscall_64+0x3f/0x90 [ 31.441879] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.442531] [ 31.442748] The buggy address belongs to the object at ffff8880140f7570 [ 31.442748] which belongs to the cache vm_area_struct of size 168 [ 31.444252] The buggy address is located 88 bytes inside of [ 31.444252] freed 168-byte region [ffff8880140f7570, ffff8880140f7618) [ 31.445675] [ 31.445897] The buggy address belongs to the physical page: [ 31.446553] page:000000003bd07ce4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x140f7 [ 31.447649] memcg:ffff888018b73401 [ 31.448075] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.448721] page_type: 0xffffffff() [ 31.449182] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.450104] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018b73401 [ 31.451013] page dumped because: kasan: bad access detected [ 31.451677] [ 31.451900] Memory state around the buggy address: [ 31.452482] ffff8880140f7480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.453365] ffff8880140f7500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.454229] >ffff8880140f7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.455106] ^ [ 31.455781] ffff8880140f7600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.456656] ffff8880140f7680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.457527] ================================================================== [ 31.458864] Disabling lock debugging due to kernel taint [ 33.898373] BUG: Bad rss-counter state mm:000000000ec86758 type:MM_FILEPAGES val:33 [ 33.899487] BUG: Bad rss-counter state mm:000000000ec86758 type:MM_ANONPAGES val:22 [ 34.388694] BUG: Bad rss-counter state mm:00000000ff6da412 type:MM_FILEPAGES val:33 [ 34.389880] BUG: Bad rss-counter state mm:00000000ff6da412 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2308' (ECDSA) to the list of known hosts. 2023/06/19 23:12:15 fuzzer started 2023/06/19 23:12:15 dialing manager at localhost:44161 2023/06/19 23:12:15 checking machine... 2023/06/19 23:12:15 checking revisions... [ 35.117944] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:12:15 testing simple program... [ 35.180386] cgroup: Unknown subsys name 'net' [ 35.222912] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:12:14 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffffffff8604e90c RCX=ffffffff86605df8 RDX=0000000000000000 RSI=ffffffff860723cc RDI=ffffffff85d793d4 RBP=ffffffff86042ad0 RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff8605a748 R13=ffffffff85d793d4 R14=ffffffff86042acc R15=dffffc0000000000 RIP=ffffffff8112fc8e 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 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=00007f00ee3cd8b0 CR3=000000000e8a6000 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=2035313a32313a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a32313a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb783e RBX=ffffffff85dbc1f0 RCX=ffffffff813ad6cf RDX=0000000000000000 RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffffffff85dbc1e8 RSP=ffff88800dedf220 R8 =ffffffff860d68c0 R9 =ffff88800dedf318 R10=0000000000038001 R11=0000000000010b7e R12=ffffffff85dbc1fc R13=ffffffff85dbc1cc R14=ffffffff85dbc1e4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----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 00007f3e000ff900 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=00007ffd88738000 CR3=000000000d4ba000 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=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