[ 26.968481] BUG: Bad rss-counter state mm:00000000282dea25 type:MM_FILEPAGES val:33 [ 26.969642] BUG: Bad rss-counter state mm:00000000282dea25 type:MM_ANONPAGES val:22 [ 27.118945] ================================================================== [ 27.119843] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.120755] Read of size 8 at addr ffff88801952fed8 by task sshd/220 [ 27.121524] [ 27.121848] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.122699] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.123685] Call Trace: [ 27.124013] [ 27.124292] dump_stack_lvl+0x91/0xf0 [ 27.124768] print_report+0xcc/0x620 [ 27.125241] ? __virt_addr_valid+0x102/0x340 [ 27.125784] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.126387] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.126991] kasan_report+0xbe/0xf0 [ 27.127465] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.128070] vma_interval_tree_remove+0xc75/0xec0 [ 27.128655] vma_prepare+0xc54/0x11a0 [ 27.129121] __split_vma+0x5af/0x950 [ 27.129581] ? __pfx___split_vma+0x10/0x10 [ 27.130096] ? find_held_lock+0x2c/0x110 [ 27.130603] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.131152] ? lock_is_held_type+0x9f/0x120 [ 27.131708] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.132306] ? mtree_range_walk+0x632/0x900 [ 27.132845] ? mas_walk+0x5c7/0x7c0 [ 27.133311] do_vmi_munmap+0x1f1/0x2b0 [ 27.133797] mmap_region+0x1f9/0x2660 [ 27.134270] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.134776] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.135478] ? __pfx_lock_acquire+0x10/0x10 [ 27.135996] ? __pfx_mmap_region+0x10/0x10 [ 27.136515] ? security_mmap_addr+0x7d/0xa0 [ 27.137031] ? get_unmapped_area+0x1f5/0x3f0 [ 27.137583] do_mmap+0x854/0xf00 [ 27.138018] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.138512] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.139069] ksys_mmap_pgoff+0x3af/0x500 [ 27.139590] do_syscall_64+0x3f/0x90 [ 27.140065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.140702] RIP: 0033:0x7f73053e8d82 [ 27.141154] 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 [ 27.143240] RSP: 002b:00007fffc7fdcee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.144121] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f73053e8d82 [ 27.144953] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7304822000 [ 27.145780] RBP: 00007f7304822000 R08: 0000000000000009 R09: 0000000000001000 [ 27.146610] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564bc8e9dec0 [ 27.147448] R13: 00007fffc7fdcf00 R14: 00007fffc7fdcf30 R15: 00007fffc7fdd290 [ 27.148302] [ 27.148598] [ 27.148815] Allocated by task 213: [ 27.149247] kasan_save_stack+0x22/0x50 [ 27.149754] kasan_set_track+0x25/0x30 [ 27.150244] __kasan_slab_alloc+0x59/0x70 [ 27.150766] kmem_cache_alloc+0x16b/0x370 [ 27.151294] vm_area_dup+0x20/0x160 [ 27.151739] __split_vma+0x170/0x950 [ 27.152204] split_vma+0xc6/0x110 [ 27.152647] mprotect_fixup+0x8d2/0xb30 [ 27.153146] do_mprotect_pkey+0x87e/0xd40 [ 27.153657] __x64_sys_mprotect+0x78/0xc0 [ 27.154164] do_syscall_64+0x3f/0x90 [ 27.154633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.155275] [ 27.155494] Freed by task 213: [ 27.155883] kasan_save_stack+0x22/0x50 [ 27.156382] kasan_set_track+0x25/0x30 [ 27.156872] kasan_save_free_info+0x2b/0x50 [ 27.157402] __kasan_slab_free+0x10a/0x190 [ 27.157927] kmem_cache_free+0x10d/0x4d0 [ 27.158438] rcu_core+0x8c8/0x2860 [ 27.158877] __do_softirq+0x1b7/0x7d4 [ 27.159357] [ 27.159570] Last potentially related work creation: [ 27.160146] kasan_save_stack+0x22/0x50 [ 27.160642] __kasan_record_aux_stack+0x8e/0xa0 [ 27.161200] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.161826] remove_vma+0x139/0x170 [ 27.162274] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.162818] do_vmi_munmap+0x1f1/0x2b0 [ 27.163312] __vm_munmap+0x138/0x3a0 [ 27.163771] __x64_sys_munmap+0x59/0x80 [ 27.164256] do_syscall_64+0x3f/0x90 [ 27.164720] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.165364] [ 27.165580] The buggy address belongs to the object at ffff88801952fe80 [ 27.165580] which belongs to the cache vm_area_struct of size 168 [ 27.167009] The buggy address is located 88 bytes inside of [ 27.167009] freed 168-byte region [ffff88801952fe80, ffff88801952ff28) [ 27.168563] [ 27.168792] The buggy address belongs to the physical page: [ 27.169453] page:0000000018c6da81 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1952f [ 27.170560] memcg:ffff88801953b101 [ 27.170999] flags: 0x100000000000200(slab|node=0|zone=1) [ 27.171663] page_type: 0xffffffff() [ 27.172120] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 27.173046] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801953b101 [ 27.173981] page dumped because: kasan: bad access detected [ 27.174671] [ 27.174886] Memory state around the buggy address: [ 27.175492] ffff88801952fd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.176363] ffff88801952fe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 27.177223] >ffff88801952fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.178084] ^ [ 27.178808] ffff88801952ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 27.179680] ffff88801952ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.180539] ================================================================== [ 27.181793] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.969228] BUG: Bad rss-counter state mm:000000000e668abc type:MM_FILEPAGES val:33 [ 29.970079] BUG: Bad rss-counter state mm:000000000e668abc type:MM_ANONPAGES val:22 [ 30.451402] BUG: Bad rss-counter state mm:0000000034f80654 type:MM_FILEPAGES val:33 [ 30.452669] BUG: Bad rss-counter state mm:0000000034f80654 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41174' (ECDSA) to the list of known hosts. 2023/06/20 04:52:02 fuzzer started 2023/06/20 04:52:03 dialing manager at localhost:44161 2023/06/20 04:52:03 checking machine... 2023/06/20 04:52:03 checking revisions... [ 31.251536] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:52:03 testing simple program... [ 31.306808] cgroup: Unknown subsys name 'net' [ 31.345066] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:51:59 Registers: info registers vcpu 0 RAX=ffff88800db8f438 RBX=ffff88800db8f360 RCX=000000008012000b RDX=000000008012000c RSI=ffff88800db8f360 RDI=ffff88800879fdc0 RBP=ffff888018127a28 RSP=ffff888018127990 R8 =000000008012000b R9 =0000000000000000 R10=ffffea000036e3c0 R11=0000000080110008 R12=ffffea000036e3c0 R13=ffff88800db8f438 R14=000000008012000b R15=ffff88800879fdc0 RIP=ffffffff818095bf RFL=00000242 [---Z---] 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 00007f74ee906900 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=00007fff79584000 CR3=000000000ed5e000 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=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 info registers vcpu 1 RAX=ffffffff810001ce RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff810001ce RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000506a R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88800e3ab500 RIP=ffffffff84532440 RFL=00000282 [--S----] 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=00007f86bc209e40 CR3=000000000e200000 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=2032303a32353a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a32353a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000