syzkaller login: [ 30.964394] BUG: Bad rss-counter state mm:00000000e72f54bb type:MM_FILEPAGES val:33 [ 30.966399] BUG: Bad rss-counter state mm:00000000e72f54bb type:MM_ANONPAGES val:22 [ 31.134795] ================================================================== [ 31.135701] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.136644] Read of size 8 at addr ffff888015b61228 by task sshd/220 [ 31.137422] [ 31.137639] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.138632] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.139625] Call Trace: [ 31.139946] [ 31.140266] dump_stack_lvl+0x91/0xf0 [ 31.140760] print_report+0xcc/0x620 [ 31.141242] ? __virt_addr_valid+0x102/0x340 [ 31.141798] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.142427] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.143068] kasan_report+0xbe/0xf0 [ 31.143547] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.144167] vma_interval_tree_remove+0xc75/0xec0 [ 31.144768] vma_prepare+0xc54/0x11a0 [ 31.145252] __split_vma+0x5af/0x950 [ 31.145720] ? __pfx___split_vma+0x10/0x10 [ 31.146246] ? find_held_lock+0x2c/0x110 [ 31.146778] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.147340] ? lock_is_held_type+0x9f/0x120 [ 31.147875] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.148491] ? mtree_range_walk+0x632/0x900 [ 31.149046] ? mas_walk+0x5c7/0x7c0 [ 31.149529] do_vmi_munmap+0x1f1/0x2b0 [ 31.150029] mmap_region+0x1f9/0x2660 [ 31.150535] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.151049] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.151765] ? __pfx_lock_acquire+0x10/0x10 [ 31.152292] ? __pfx_mmap_region+0x10/0x10 [ 31.152827] ? security_mmap_addr+0x7d/0xa0 [ 31.153361] ? get_unmapped_area+0x1f5/0x3f0 [ 31.153910] do_mmap+0x854/0xf00 [ 31.154347] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.154859] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.155423] ksys_mmap_pgoff+0x3af/0x500 [ 31.155923] do_syscall_64+0x3f/0x90 [ 31.156407] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.157060] RIP: 0033:0x7f87350dbd82 [ 31.157519] 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 [ 31.159663] RSP: 002b:00007ffca1bbc828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.160568] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f87350dbd82 [ 31.161413] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8734515000 [ 31.162259] RBP: 00007f8734515000 R08: 0000000000000009 R09: 0000000000001000 [ 31.163107] R10: 0000000000000812 R11: 0000000000000206 R12: 00005563d8bb3d90 [ 31.163955] R13: 00007ffca1bbc840 R14: 00007ffca1bbc870 R15: 00007ffca1bbcbd0 [ 31.164816] [ 31.165108] [ 31.165321] Allocated by task 213: [ 31.165747] kasan_save_stack+0x22/0x50 [ 31.166248] kasan_set_track+0x25/0x30 [ 31.166756] __kasan_slab_alloc+0x59/0x70 [ 31.167276] kmem_cache_alloc+0x16b/0x370 [ 31.167791] vm_area_dup+0x20/0x160 [ 31.168247] __split_vma+0x170/0x950 [ 31.168725] split_vma+0xc6/0x110 [ 31.169163] mprotect_fixup+0x8d2/0xb30 [ 31.169663] do_mprotect_pkey+0x87e/0xd40 [ 31.170177] __x64_sys_mprotect+0x78/0xc0 [ 31.170698] do_syscall_64+0x3f/0x90 [ 31.171180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.171828] [ 31.172044] Freed by task 213: [ 31.172440] kasan_save_stack+0x22/0x50 [ 31.172954] kasan_set_track+0x25/0x30 [ 31.173446] kasan_save_free_info+0x2b/0x50 [ 31.173974] __kasan_slab_free+0x10a/0x190 [ 31.174515] kmem_cache_free+0x10d/0x4d0 [ 31.175034] rcu_core+0x8c8/0x2860 [ 31.175490] __do_softirq+0x1b7/0x7d4 [ 31.175982] [ 31.176198] Last potentially related work creation: [ 31.176787] kasan_save_stack+0x22/0x50 [ 31.177295] __kasan_record_aux_stack+0x8e/0xa0 [ 31.177864] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.178522] remove_vma+0x139/0x170 [ 31.178973] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.179527] do_vmi_munmap+0x1f1/0x2b0 [ 31.180013] __vm_munmap+0x138/0x3a0 [ 31.180483] __x64_sys_munmap+0x59/0x80 [ 31.180975] do_syscall_64+0x3f/0x90 [ 31.181446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.182081] [ 31.182294] The buggy address belongs to the object at ffff888015b611d0 [ 31.182294] which belongs to the cache vm_area_struct of size 168 [ 31.183756] The buggy address is located 88 bytes inside of [ 31.183756] freed 168-byte region [ffff888015b611d0, ffff888015b61278) [ 31.185152] [ 31.185375] The buggy address belongs to the physical page: [ 31.186034] page:000000009f3afcbf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b61 [ 31.187142] memcg:ffff88801816e701 [ 31.187566] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.188208] page_type: 0xffffffff() [ 31.188659] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.189573] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801816e701 [ 31.190482] page dumped because: kasan: bad access detected [ 31.191141] [ 31.191359] Memory state around the buggy address: [ 31.191938] ffff888015b61100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.192793] ffff888015b61180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.193652] >ffff888015b61200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.194511] ^ [ 31.195063] ffff888015b61280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.195920] ffff888015b61300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.196781] ================================================================== [ 31.197759] Disabling lock debugging due to kernel taint [ 33.145598] BUG: Bad rss-counter state mm:000000004517ab6c type:MM_FILEPAGES val:33 [ 33.146926] BUG: Bad rss-counter state mm:000000004517ab6c type:MM_ANONPAGES val:22 [ 33.664384] BUG: Bad rss-counter state mm:0000000005308060 type:MM_FILEPAGES val:33 [ 33.665710] BUG: Bad rss-counter state mm:0000000005308060 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4426' (ECDSA) to the list of known hosts. 2023/06/20 14:34:00 fuzzer started 2023/06/20 14:34:00 dialing manager at localhost:36067 2023/06/20 14:34:00 checking machine... 2023/06/20 14:34:00 checking revisions... [ 34.414324] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:34:00 testing simple program... [ 34.460584] cgroup: Unknown subsys name 'net' [ 34.498768] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:34:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652c60 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=00007feb3cd59b39 RDI=ffffffff85652c60 RBP=00007feb3cd59b39 RSP=ffff8880102cf960 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d7d R12=00007feb3cd59b39 R13=0000000000000000 R14=ffff8880102d0000 R15=ffff88801a3aac60 RIP=ffffffff814c0860 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007feb3c1e0900 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=00007feb3b653df0 CR3=000000000d9d6000 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=b3285ca56c489dff0000000000109ed8 XMM01=5e62e4b7023d2e906547d780182289f5 XMM02=ec2efd57dc4c00df0000000000119e38 XMM03=39c8399b1b72af490000000000119f08 XMM04=8d49e1ef26ba040a00000000000ae988 XMM05=19e9129bd510f2350000000000131658 XMM06=76d32a986bc1001d00000000001304c0 XMM07=e042d86d42eb936e00000000001217a0 XMM08=39c8399b1b72af490000000000119f08 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb4334 RBX=ffffffff85da19a0 RCX=ffffffff8120686e RDX=0000000000000000 RSI=ffffffff860ae4d2 RDI=ffffffff85da19a0 RBP=ffffffff85da19a0 RSP=ffff888008e378c0 R8 =ffffffff860ae4d2 R9 =ffff888008e379b8 R10=0000000000038001 R11=0000000000009bf7 R12=ffffffff85da19a0 R13=ffffffff85da19a0 R14=ffffffff85da19a0 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 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=00007ffc06378000 CR3=000000000eccc000 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