[ 24.098849] BUG: Bad rss-counter state mm:00000000d7ec273d type:MM_FILEPAGES val:33 [ 24.100044] BUG: Bad rss-counter state mm:00000000d7ec273d type:MM_ANONPAGES val:22 [ 24.141970] ================================================================== [ 24.142890] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.143841] Read of size 8 at addr ffff88801bc834e0 by task sshd/220 [ 24.144702] [ 24.144918] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.145784] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.146806] Call Trace: [ 24.147162] [ 24.147463] dump_stack_lvl+0x91/0xf0 [ 24.147975] print_report+0xcc/0x620 [ 24.148490] ? __virt_addr_valid+0x102/0x340 [ 24.149068] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.149737] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.150385] kasan_report+0xbe/0xf0 [ 24.150906] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.151567] vma_interval_tree_remove+0xc75/0xec0 [ 24.152224] vma_prepare+0xc54/0x11a0 [ 24.152740] __split_vma+0x5af/0x950 [ 24.153246] ? __pfx___split_vma+0x10/0x10 [ 24.153818] ? find_held_lock+0x2c/0x110 [ 24.154390] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.155029] ? lock_is_held_type+0x9f/0x120 [ 24.155609] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.156263] ? mtree_range_walk+0x632/0x900 [ 24.156852] ? mas_walk+0x5c7/0x7c0 [ 24.157362] do_vmi_munmap+0x1f1/0x2b0 [ 24.157905] mmap_region+0x1f9/0x2660 [ 24.158435] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.159003] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.159784] ? __pfx_lock_acquire+0x10/0x10 [ 24.160354] ? __pfx_mmap_region+0x10/0x10 [ 24.160937] ? security_mmap_addr+0x7d/0xa0 [ 24.161510] ? get_unmapped_area+0x1f5/0x3f0 [ 24.162103] do_mmap+0x854/0xf00 [ 24.162585] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.163142] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.163753] ksys_mmap_pgoff+0x3af/0x500 [ 24.164305] do_syscall_64+0x3f/0x90 [ 24.164820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.165523] RIP: 0033:0x7f0b903dcd82 [ 24.166010] 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 [ 24.168299] RSP: 002b:00007fffb46d5e88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.169262] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0b903dcd82 [ 24.170157] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0b8f816000 [ 24.171058] RBP: 00007f0b8f816000 R08: 0000000000000009 R09: 0000000000001000 [ 24.171975] R10: 0000000000000812 R11: 0000000000000206 R12: 000055853ff22f70 [ 24.172873] R13: 00007fffb46d5ea0 R14: 00007fffb46d5ed0 R15: 00007fffb46d6230 [ 24.173819] [ 24.174139] [ 24.174378] Allocated by task 210: [ 24.174861] kasan_save_stack+0x22/0x50 [ 24.175410] kasan_set_track+0x25/0x30 [ 24.175926] __kasan_slab_alloc+0x59/0x70 [ 24.176492] kmem_cache_alloc+0x16b/0x370 [ 24.177057] vm_area_dup+0x20/0x160 [ 24.177558] __split_vma+0x170/0x950 [ 24.178064] split_vma+0xc6/0x110 [ 24.178539] mprotect_fixup+0x8d2/0xb30 [ 24.179093] do_mprotect_pkey+0x87e/0xd40 [ 24.179656] __x64_sys_mprotect+0x78/0xc0 [ 24.180203] do_syscall_64+0x3f/0x90 [ 24.180717] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.181385] [ 24.181614] Freed by task 210: [ 24.182040] kasan_save_stack+0x22/0x50 [ 24.182589] kasan_set_track+0x25/0x30 [ 24.183132] kasan_save_free_info+0x2b/0x50 [ 24.183710] __kasan_slab_free+0x10a/0x190 [ 24.184273] kmem_cache_free+0x10d/0x4d0 [ 24.184824] rcu_core+0x8c8/0x2860 [ 24.185288] __do_softirq+0x1b7/0x7d4 [ 24.185803] [ 24.186037] Last potentially related work creation: [ 24.186677] kasan_save_stack+0x22/0x50 [ 24.187239] __kasan_record_aux_stack+0x8e/0xa0 [ 24.187864] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.188555] remove_vma+0x139/0x170 [ 24.189025] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.189602] do_vmi_munmap+0x1f1/0x2b0 [ 24.190119] __vm_munmap+0x138/0x3a0 [ 24.190609] __x64_sys_munmap+0x59/0x80 [ 24.191183] do_syscall_64+0x3f/0x90 [ 24.191710] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.192417] [ 24.192651] The buggy address belongs to the object at ffff88801bc83488 [ 24.192651] which belongs to the cache vm_area_struct of size 168 [ 24.194294] The buggy address is located 88 bytes inside of [ 24.194294] freed 168-byte region [ffff88801bc83488, ffff88801bc83530) [ 24.195893] [ 24.196135] The buggy address belongs to the physical page: [ 24.196881] page:00000000e9c19002 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc83 [ 24.198078] memcg:ffff88801bc0af01 [ 24.198560] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.199299] page_type: 0xffffffff() [ 24.199806] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 24.200837] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc0af01 [ 24.201835] page dumped because: kasan: bad access detected [ 24.202561] [ 24.202798] Memory state around the buggy address: [ 24.203448] ffff88801bc83380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.204395] ffff88801bc83400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 24.205341] >ffff88801bc83480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.206271] ^ [ 24.207111] ffff88801bc83500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.208054] ffff88801bc83580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.208990] ================================================================== [ 24.210093] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.117553] BUG: Bad rss-counter state mm:00000000046e2359 type:MM_FILEPAGES val:33 [ 26.118548] BUG: Bad rss-counter state mm:00000000046e2359 type:MM_ANONPAGES val:22 [ 26.619416] BUG: Bad rss-counter state mm:00000000cc689974 type:MM_FILEPAGES val:33 [ 26.620590] BUG: Bad rss-counter state mm:00000000cc689974 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60450' (ECDSA) to the list of known hosts. 2023/06/20 06:38:45 fuzzer started 2023/06/20 06:38:45 dialing manager at localhost:44161 2023/06/20 06:38:45 checking machine... 2023/06/20 06:38:45 checking revisions... [ 27.298315] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:38:46 testing simple program... [ 27.350764] cgroup: Unknown subsys name 'net' [ 27.414771] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:38:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81894b28 RDI=0000000000000005 RBP=ffff888016312068 RSP=ffff888015f17a60 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000024 R13=0000000000000024 R14=ffffffff856f0b20 R15=ffff88801631206a RIP=ffffffff81894b41 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 00007f83c4de0900 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=00007f83c53980b0 CR3=000000000ea4a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffccea57f58 CR3=0000000016c7c000 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=2035343a38333a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a38333a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000