syzkaller login: [ 29.076865] BUG: Bad rss-counter state mm:00000000d0d68fb6 type:MM_FILEPAGES val:33 [ 29.078253] BUG: Bad rss-counter state mm:00000000d0d68fb6 type:MM_ANONPAGES val:22 [ 29.229771] ================================================================== [ 29.230914] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.232008] Read of size 8 at addr ffff888018f115c8 by task sshd/218 [ 29.232947] [ 29.233173] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.234051] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.235064] Call Trace: [ 29.235384] [ 29.235671] dump_stack_lvl+0x91/0xf0 [ 29.236157] print_report+0xcc/0x620 [ 29.236646] ? __virt_addr_valid+0x102/0x340 [ 29.237196] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.237816] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.238438] kasan_report+0xbe/0xf0 [ 29.238927] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.239551] vma_interval_tree_remove+0xc75/0xec0 [ 29.240161] vma_prepare+0xc54/0x11a0 [ 29.240637] __split_vma+0x5af/0x950 [ 29.241105] ? __pfx___split_vma+0x10/0x10 [ 29.241637] ? find_held_lock+0x2c/0x110 [ 29.242154] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.242739] ? lock_is_held_type+0x9f/0x120 [ 29.243278] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.243893] ? mtree_range_walk+0x632/0x900 [ 29.244439] ? mas_walk+0x5c7/0x7c0 [ 29.244920] do_vmi_munmap+0x1f1/0x2b0 [ 29.245409] mmap_region+0x1f9/0x2660 [ 29.245890] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.246414] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.247129] ? __pfx_lock_acquire+0x10/0x10 [ 29.247662] ? __pfx_mmap_region+0x10/0x10 [ 29.248199] ? security_mmap_addr+0x7d/0xa0 [ 29.248751] ? get_unmapped_area+0x1f5/0x3f0 [ 29.249304] do_mmap+0x854/0xf00 [ 29.249742] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.250231] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.250795] ksys_mmap_pgoff+0x3af/0x500 [ 29.251298] do_syscall_64+0x3f/0x90 [ 29.251779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.252420] RIP: 0033:0x7f2192f13d82 [ 29.252876] 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 [ 29.255014] RSP: 002b:00007ffddf0da6e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.255917] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2192f13d82 [ 29.256770] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f219234d000 [ 29.257617] RBP: 00007f219234d000 R08: 0000000000000009 R09: 0000000000001000 [ 29.258460] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f2ded6bf70 [ 29.259315] R13: 00007ffddf0da700 R14: 00007ffddf0da730 R15: 00007ffddf0daa90 [ 29.260172] [ 29.260478] [ 29.260693] Allocated by task 211: [ 29.261130] kasan_save_stack+0x22/0x50 [ 29.261631] kasan_set_track+0x25/0x30 [ 29.262122] __kasan_slab_alloc+0x59/0x70 [ 29.262660] kmem_cache_alloc+0x16b/0x370 [ 29.263178] vm_area_dup+0x20/0x160 [ 29.263629] __split_vma+0x170/0x950 [ 29.264098] split_vma+0xc6/0x110 [ 29.264541] mprotect_fixup+0x8d2/0xb30 [ 29.265054] do_mprotect_pkey+0x87e/0xd40 [ 29.265577] __x64_sys_mprotect+0x78/0xc0 [ 29.266097] do_syscall_64+0x3f/0x90 [ 29.266587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.267228] [ 29.267444] Freed by task 211: [ 29.267843] kasan_save_stack+0x22/0x50 [ 29.268346] kasan_set_track+0x25/0x30 [ 29.268834] kasan_save_free_info+0x2b/0x50 [ 29.269358] __kasan_slab_free+0x10a/0x190 [ 29.269888] kmem_cache_free+0x10d/0x4d0 [ 29.270396] rcu_core+0x8c8/0x2860 [ 29.270844] __do_softirq+0x1b7/0x7d4 [ 29.271315] [ 29.271528] Last potentially related work creation: [ 29.272108] kasan_save_stack+0x22/0x50 [ 29.272610] __kasan_record_aux_stack+0x8e/0xa0 [ 29.273178] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.273818] remove_vma+0x139/0x170 [ 29.274269] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.274852] do_vmi_munmap+0x1f1/0x2b0 [ 29.275333] __vm_munmap+0x138/0x3a0 [ 29.275798] __x64_sys_munmap+0x59/0x80 [ 29.276293] do_syscall_64+0x3f/0x90 [ 29.276768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.277405] [ 29.277620] The buggy address belongs to the object at ffff888018f11570 [ 29.277620] which belongs to the cache vm_area_struct of size 168 [ 29.279093] The buggy address is located 88 bytes inside of [ 29.279093] freed 168-byte region [ffff888018f11570, ffff888018f11618) [ 29.280497] [ 29.280711] The buggy address belongs to the physical page: [ 29.281363] page:00000000e2ca5abe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f11 [ 29.282455] memcg:ffff88801021a401 [ 29.282899] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.283546] page_type: 0xffffffff() [ 29.284006] raw: 0100000000000200 ffff88800879fc80 ffffea0000266b00 dead000000000004 [ 29.284916] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801021a401 [ 29.285820] page dumped because: kasan: bad access detected [ 29.286491] [ 29.286717] Memory state around the buggy address: [ 29.287302] ffff888018f11480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.288156] ffff888018f11500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 29.289009] >ffff888018f11580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.289872] ^ [ 29.290606] ffff888018f11600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.291473] ffff888018f11680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.292318] ================================================================== [ 29.293293] Disabling lock debugging due to kernel taint [ 31.327156] BUG: Bad rss-counter state mm:0000000047001484 type:MM_FILEPAGES val:33 [ 31.328351] BUG: Bad rss-counter state mm:0000000047001484 type:MM_ANONPAGES val:22 [ 31.726904] BUG: Bad rss-counter state mm:00000000acc71d9f type:MM_FILEPAGES val:33 [ 31.728419] BUG: Bad rss-counter state mm:00000000acc71d9f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19980' (ECDSA) to the list of known hosts. 2023/06/19 12:06:30 fuzzer started 2023/06/19 12:06:30 dialing manager at localhost:44161 2023/06/19 12:06:30 checking machine... 2023/06/19 12:06:30 checking revisions... [ 32.456396] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:06:30 testing simple program... [ 32.508655] cgroup: Unknown subsys name 'net' [ 32.545725] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:06:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff8880102d1b40 RSI=ffffffff8173f27c RDI=0000000000000005 RBP=ffff88800d78a1d0 RSP=ffff888017d57c08 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800d78a1e0 R13=0000000000000000 R14=ffff88800d78a200 R15=00007f68784e7000 RIP=ffffffff8173f27c RFL=00000293 [--S-A-C] 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 00007f68784fb900 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=00007f68784da020 CR3=000000001a0f4000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffffffff85d3d010 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff110012a5dfa RSP=ffff88800952efc0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000009293 R12=ffffffff8560b640 R13=ffffffff81830c63 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff812d86d9 RFL=00000046 [---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 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=00007f4d8e5ec930 CR3=000000000f1c0000 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=2039323a36303a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a36303a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000