syzkaller login: [ 31.076345] BUG: Bad rss-counter state mm:0000000019ce528f type:MM_FILEPAGES val:33 [ 31.077774] BUG: Bad rss-counter state mm:0000000019ce528f type:MM_ANONPAGES val:22 [ 31.225853] ================================================================== [ 31.226956] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.228072] Read of size 8 at addr ffff88801684f310 by task sshd/221 [ 31.229170] [ 31.229446] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.230334] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.231386] Call Trace: [ 31.231713] [ 31.231997] dump_stack_lvl+0x91/0xf0 [ 31.232498] print_report+0xcc/0x620 [ 31.232978] ? __virt_addr_valid+0x102/0x340 [ 31.233570] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.234195] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.234809] kasan_report+0xbe/0xf0 [ 31.235289] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.235916] vma_interval_tree_remove+0xc75/0xec0 [ 31.236526] vma_prepare+0xc54/0x11a0 [ 31.237003] __split_vma+0x5af/0x950 [ 31.237514] ? __pfx___split_vma+0x10/0x10 [ 31.238045] ? find_held_lock+0x2c/0x110 [ 31.238574] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.239137] ? lock_is_held_type+0x9f/0x120 [ 31.239687] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.240293] ? mtree_range_walk+0x632/0x900 [ 31.240843] ? mas_walk+0x5c7/0x7c0 [ 31.241356] do_vmi_munmap+0x1f1/0x2b0 [ 31.241855] mmap_region+0x1f9/0x2660 [ 31.242346] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.242863] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.243569] ? __pfx_lock_acquire+0x10/0x10 [ 31.244096] ? __pfx_mmap_region+0x10/0x10 [ 31.244626] ? security_mmap_addr+0x7d/0xa0 [ 31.245158] ? get_unmapped_area+0x1f5/0x3f0 [ 31.245753] do_mmap+0x854/0xf00 [ 31.246193] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.246690] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.247252] ksys_mmap_pgoff+0x3af/0x500 [ 31.247765] do_syscall_64+0x3f/0x90 [ 31.248247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.248908] RIP: 0033:0x7f931949fd82 [ 31.249390] 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 [ 31.251554] RSP: 002b:00007ffe4078ca78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.252452] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f931949fd82 [ 31.253314] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f93188d9000 [ 31.254156] RBP: 00007f93188d9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.255000] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557edf57fec0 [ 31.255846] R13: 00007ffe4078ca90 R14: 00007ffe4078cac0 R15: 00007ffe4078ce20 [ 31.256693] [ 31.256984] [ 31.257199] Allocated by task 214: [ 31.257676] kasan_save_stack+0x22/0x50 [ 31.258179] kasan_set_track+0x25/0x30 [ 31.258673] __kasan_slab_alloc+0x59/0x70 [ 31.259203] kmem_cache_alloc+0x16b/0x370 [ 31.259718] vm_area_dup+0x20/0x160 [ 31.260177] __split_vma+0x170/0x950 [ 31.260637] split_vma+0xc6/0x110 [ 31.261073] mprotect_fixup+0x8d2/0xb30 [ 31.261609] do_mprotect_pkey+0x87e/0xd40 [ 31.262135] __x64_sys_mprotect+0x78/0xc0 [ 31.262655] do_syscall_64+0x3f/0x90 [ 31.263126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.263766] [ 31.263981] Freed by task 214: [ 31.264375] kasan_save_stack+0x22/0x50 [ 31.264875] kasan_set_track+0x25/0x30 [ 31.265408] kasan_save_free_info+0x2b/0x50 [ 31.265942] __kasan_slab_free+0x10a/0x190 [ 31.266482] kmem_cache_free+0x10d/0x4d0 [ 31.266984] rcu_core+0x8c8/0x2860 [ 31.267434] __do_softirq+0x1b7/0x7d4 [ 31.267916] [ 31.268130] Last potentially related work creation: [ 31.268714] kasan_save_stack+0x22/0x50 [ 31.269232] __kasan_record_aux_stack+0x8e/0xa0 [ 31.269890] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.270532] remove_vma+0x139/0x170 [ 31.270981] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.271536] do_vmi_munmap+0x1f1/0x2b0 [ 31.272020] __vm_munmap+0x138/0x3a0 [ 31.272489] __x64_sys_munmap+0x59/0x80 [ 31.272986] do_syscall_64+0x3f/0x90 [ 31.273511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.274164] [ 31.274382] The buggy address belongs to the object at ffff88801684f2b8 [ 31.274382] which belongs to the cache vm_area_struct of size 168 [ 31.275849] The buggy address is located 88 bytes inside of [ 31.275849] freed 168-byte region [ffff88801684f2b8, ffff88801684f360) [ 31.277276] [ 31.277498] The buggy address belongs to the physical page: [ 31.278162] page:000000006d13a800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1684f [ 31.279248] memcg:ffff888018d87701 [ 31.279675] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.280316] page_type: 0xffffffff() [ 31.280765] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.281719] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018d87701 [ 31.282613] page dumped because: kasan: bad access detected [ 31.283270] [ 31.283482] Memory state around the buggy address: [ 31.284059] ffff88801684f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.284912] ffff88801684f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.285798] >ffff88801684f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.286650] ^ [ 31.287114] ffff88801684f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.287974] ffff88801684f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.288833] ================================================================== [ 31.289801] Disabling lock debugging due to kernel taint [ 33.763217] BUG: Bad rss-counter state mm:00000000f1c15a39 type:MM_FILEPAGES val:33 [ 33.764171] BUG: Bad rss-counter state mm:00000000f1c15a39 type:MM_ANONPAGES val:22 [ 34.186236] BUG: Bad rss-counter state mm:0000000023b761bb type:MM_FILEPAGES val:33 [ 34.187859] BUG: Bad rss-counter state mm:0000000023b761bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61487' (ECDSA) to the list of known hosts. 2023/06/20 14:13:51 fuzzer started 2023/06/20 14:13:52 dialing manager at localhost:36067 2023/06/20 14:13:52 checking machine... 2023/06/20 14:13:52 checking revisions... [ 34.874798] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:13:52 testing simple program... [ 34.915540] cgroup: Unknown subsys name 'net' [ 34.956196] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:13:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff87f97640 RCX=00007ffd065fa7b4 RDX=000000000000541b RSI=ffff88800885e1c0 RDI=ffffffff87f97640 RBP=1ffff110028b1f85 RSP=ffff88801458fc10 R8 =0000000000000005 R9 =0000000080108907 R10=000000000000541b R11=0000000000000001 R12=000000000000541b R13=00007ffd065fa7b4 R14=00000000ffffca2b R15=ffff88800885e1c0 RIP=ffffffff83633762 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 00007f145fc86900 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=00007f145f0c51c0 CR3=000000000d8bc000 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=933c31be167f2381ae4f252d39d45244 XMM02=000000000011d6e8eff9b2d0a8fce9cb XMM03=000000000011d7b82c67c8bc2e329bc3 XMM04=4171215c3e0e081000000000000ae988 XMM05=298fb9a434e66d740000000000132ce0 XMM06=c291bd5c70af25b90000000000131ad0 XMM07=fb795ef6d65770560000000000121e20 XMM08=2c67c8bc2e329bc3000000000011d758 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff860d8256 RDX=ffff88800f4af940 RSI=1ffff11001e95f2a RDI=1ffff11001e95f2a RBP=ffff88800f4af950 RSP=ffff88800f4af888 R8 =ffffffff860d825a R9 =ffff88800f4af938 R10=0000000000038001 R11=0000000000010b8d R12=ffff88800f4af958 R13=ffff88800f4af940 R14=ffff88800f4afa30 R15=ffff88800f4af8f8 RIP=ffffffff811310a7 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 00007f69228f5900 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=00007ffe274af000 CR3=0000000013abe000 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