[ 24.260886] BUG: Bad rss-counter state mm:0000000081b5ab02 type:MM_FILEPAGES val:33 [ 24.261651] BUG: Bad rss-counter state mm:0000000081b5ab02 type:MM_ANONPAGES val:22 [ 24.370951] ================================================================== [ 24.372043] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.373169] Read of size 8 at addr ffff8880167a6b38 by task sshd/219 [ 24.374088] [ 24.374486] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.375515] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.376690] Call Trace: [ 24.377073] [ 24.377414] dump_stack_lvl+0x91/0xf0 [ 24.378006] print_report+0xcc/0x620 [ 24.378586] ? __virt_addr_valid+0x102/0x340 [ 24.379248] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.380012] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.380659] kasan_report+0xbe/0xf0 [ 24.380944] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.381321] vma_interval_tree_remove+0xc75/0xec0 [ 24.381680] vma_prepare+0xc54/0x11a0 [ 24.381962] __split_vma+0x5af/0x950 [ 24.382246] ? __pfx___split_vma+0x10/0x10 [ 24.382572] ? find_held_lock+0x2c/0x110 [ 24.382883] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.383229] ? lock_is_held_type+0x9f/0x120 [ 24.383550] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.383921] ? mtree_range_walk+0x632/0x900 [ 24.384257] ? mas_walk+0x5c7/0x7c0 [ 24.384541] do_vmi_munmap+0x1f1/0x2b0 [ 24.384842] mmap_region+0x1f9/0x2660 [ 24.385135] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.385444] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.385879] ? __pfx_lock_acquire+0x10/0x10 [ 24.386202] ? __pfx_mmap_region+0x10/0x10 [ 24.386529] ? security_mmap_addr+0x7d/0xa0 [ 24.386860] ? get_unmapped_area+0x1f5/0x3f0 [ 24.387184] do_mmap+0x854/0xf00 [ 24.387446] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.387747] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.388090] ksys_mmap_pgoff+0x3af/0x500 [ 24.388391] do_syscall_64+0x3f/0x90 [ 24.388679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.389074] RIP: 0033:0x7f6470fe6d82 [ 24.389356] 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 [ 24.390662] RSP: 002b:00007ffd571e9ac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.391209] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6470fe6d82 [ 24.391727] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6470420000 [ 24.392251] RBP: 00007f6470420000 R08: 0000000000000009 R09: 0000000000001000 [ 24.392763] R10: 0000000000000812 R11: 0000000000000206 R12: 00005621a5f67980 [ 24.393286] R13: 00007ffd571e9ae0 R14: 00007ffd571e9b10 R15: 00007ffd571e9e70 [ 24.393806] [ 24.393983] [ 24.394113] Allocated by task 209: [ 24.394379] kasan_save_stack+0x22/0x50 [ 24.394689] kasan_set_track+0x25/0x30 [ 24.394986] __kasan_slab_alloc+0x59/0x70 [ 24.395307] kmem_cache_alloc+0x16b/0x370 [ 24.395608] vm_area_dup+0x20/0x160 [ 24.395888] __split_vma+0x170/0x950 [ 24.396169] split_vma+0xc6/0x110 [ 24.396435] mprotect_fixup+0x8d2/0xb30 [ 24.396732] do_mprotect_pkey+0x87e/0xd40 [ 24.397041] __x64_sys_mprotect+0x78/0xc0 [ 24.397356] do_syscall_64+0x3f/0x90 [ 24.397643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.398027] [ 24.398158] Freed by task 19: [ 24.398383] kasan_save_stack+0x22/0x50 [ 24.398686] kasan_set_track+0x25/0x30 [ 24.398978] kasan_save_free_info+0x2b/0x50 [ 24.399291] __kasan_slab_free+0x10a/0x190 [ 24.399611] kmem_cache_free+0x10d/0x4d0 [ 24.399931] rcu_core+0x8c8/0x2860 [ 24.400199] __do_softirq+0x1b7/0x7d4 [ 24.400492] [ 24.400619] Last potentially related work creation: [ 24.400975] kasan_save_stack+0x22/0x50 [ 24.401277] __kasan_record_aux_stack+0x8e/0xa0 [ 24.401618] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.401993] remove_vma+0x139/0x170 [ 24.402263] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.402600] do_vmi_munmap+0x1f1/0x2b0 [ 24.402888] __vm_munmap+0x138/0x3a0 [ 24.403171] __x64_sys_munmap+0x59/0x80 [ 24.403456] do_syscall_64+0x3f/0x90 [ 24.403734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.404130] [ 24.404255] Second to last potentially related work creation: [ 24.404671] kasan_save_stack+0x22/0x50 [ 24.404975] __kasan_record_aux_stack+0x8e/0xa0 [ 24.405323] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.405713] remove_vma+0x139/0x170 [ 24.405979] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.406307] do_vmi_munmap+0x1f1/0x2b0 [ 24.406597] mmap_region+0x1f9/0x2660 [ 24.406883] do_mmap+0x854/0xf00 [ 24.407141] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.407432] ksys_mmap_pgoff+0x3af/0x500 [ 24.407729] do_syscall_64+0x3f/0x90 [ 24.408021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.408396] [ 24.408523] The buggy address belongs to the object at ffff8880167a6ae0 [ 24.408523] which belongs to the cache vm_area_struct of size 168 [ 24.409412] The buggy address is located 88 bytes inside of [ 24.409412] freed 168-byte region [ffff8880167a6ae0, ffff8880167a6b88) [ 24.410247] [ 24.410376] The buggy address belongs to the physical page: [ 24.410779] page:0000000051fd2fb8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167a6 [ 24.411436] memcg:ffff88801580fc01 [ 24.411685] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.412087] page_type: 0xffffffff() [ 24.412351] raw: 0100000000000200 ffff8880087a0c80 ffffea00003af6c0 dead000000000008 [ 24.412915] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801580fc01 [ 24.413459] page dumped because: kasan: bad access detected [ 24.413853] [ 24.413983] Memory state around the buggy address: [ 24.414334] ffff8880167a6a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.414841] ffff8880167a6a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 24.415351] >ffff8880167a6b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.415941] ^ [ 24.416308] ffff8880167a6b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 24.416823] ffff8880167a6c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.417336] ================================================================== [ 24.417933] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.287912] BUG: Bad rss-counter state mm:0000000077aa96c0 type:MM_FILEPAGES val:33 [ 26.288687] BUG: Bad rss-counter state mm:0000000077aa96c0 type:MM_ANONPAGES val:22 [ 26.750210] BUG: Bad rss-counter state mm:000000002e0c3ea5 type:MM_FILEPAGES val:33 [ 26.751449] BUG: Bad rss-counter state mm:000000002e0c3ea5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32944' (ECDSA) to the list of known hosts. 2023/06/21 09:23:33 fuzzer started 2023/06/21 09:23:33 dialing manager at localhost:36067 2023/06/21 09:23:33 checking machine... 2023/06/21 09:23:33 checking revisions... [ 27.458731] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:23:33 testing simple program... [ 27.509768] cgroup: Unknown subsys name 'net' [ 27.578628] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:23:33 Registers: info registers vcpu 0 RAX=0000000000000200 RBX=ffff88800e1c4000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffff88800e1c4000 RDI=ffffffff81810727 RBP=ffff8880087b8780 RSP=ffff888008d9fca8 R8 =0000000050fc478b R9 =ffff888008d9f998 R10=0000000000038001 R11=0000000000000128 R12=0000000000000200 R13=ffffea0000387100 R14=ffffffff8186b835 R15=ffff8880097f6400 RIP=ffffffff815343b0 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 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=00007ffe8cd06968 CR3=000000000d634000 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=2033333a33323a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a33323a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=8b98b5d2fc507d00 RBX=ffffffff813ad470 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff85d3d350 RBP=ffff88806cf09ad8 RSP=ffff88806cf09a40 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88806cf09b08 R13=0000000000000000 R14=ffff888018e51b40 R15=ffff8880097f6400 RIP=ffffffff810bd079 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 00007fdcecfac900 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=00007ffde1f40ff8 CR3=00000000164ac000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000