[ 31.038924] BUG: Bad rss-counter state mm:000000009bd33715 type:MM_FILEPAGES val:33 [ 31.040901] BUG: Bad rss-counter state mm:000000009bd33715 type:MM_ANONPAGES val:22 [ 31.211253] ================================================================== [ 31.212369] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.213515] Read of size 8 at addr ffff888009c67880 by task sshd/219 [ 31.214284] [ 31.214500] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.215386] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.216388] Call Trace: [ 31.216709] <TASK> [ 31.216992] dump_stack_lvl+0x91/0xf0 [ 31.217485] print_report+0xcc/0x620 [ 31.217971] ? __virt_addr_valid+0x102/0x340 [ 31.218519] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.219129] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.219775] kasan_report+0xbe/0xf0 [ 31.220276] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.220909] vma_interval_tree_remove+0xc75/0xec0 [ 31.221514] vma_prepare+0xc54/0x11a0 [ 31.221993] __split_vma+0x5af/0x950 [ 31.222463] ? __pfx___split_vma+0x10/0x10 [ 31.222992] ? find_held_lock+0x2c/0x110 [ 31.223549] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.224128] ? lock_is_held_type+0x9f/0x120 [ 31.224700] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.225305] ? mtree_range_walk+0x632/0x900 [ 31.225863] ? mas_walk+0x5c7/0x7c0 [ 31.226344] do_vmi_munmap+0x1f1/0x2b0 [ 31.226837] mmap_region+0x1f9/0x2660 [ 31.227330] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.227860] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.228647] ? __pfx_lock_acquire+0x10/0x10 [ 31.229186] ? __pfx_mmap_region+0x10/0x10 [ 31.229737] ? security_mmap_addr+0x7d/0xa0 [ 31.230273] ? get_unmapped_area+0x1f5/0x3f0 [ 31.230831] do_mmap+0x854/0xf00 [ 31.231271] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.231765] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.232396] ksys_mmap_pgoff+0x3af/0x500 [ 31.232913] do_syscall_64+0x3f/0x90 [ 31.233394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.234048] RIP: 0033:0x7efed9cced82 [ 31.234512] 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 [ 31.236671] RSP: 002b:00007ffd39c692e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.237566] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efed9cced82 [ 31.238413] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efed9108000 [ 31.239249] RBP: 00007efed9108000 R08: 0000000000000009 R09: 0000000000001000 [ 31.240110] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e6a7a84b20 [ 31.240995] R13: 00007ffd39c69300 R14: 00007ffd39c69330 R15: 00007ffd39c69690 [ 31.241853] </TASK> [ 31.242143] [ 31.242358] Allocated by task 212: [ 31.242790] kasan_save_stack+0x22/0x50 [ 31.243301] kasan_set_track+0x25/0x30 [ 31.243879] __kasan_slab_alloc+0x59/0x70 [ 31.244571] kmem_cache_alloc+0x16b/0x370 [ 31.245203] vm_area_dup+0x20/0x160 [ 31.245673] __split_vma+0x170/0x950 [ 31.246139] split_vma+0xc6/0x110 [ 31.246612] mprotect_fixup+0x8d2/0xb30 [ 31.247121] do_mprotect_pkey+0x87e/0xd40 [ 31.247681] __x64_sys_mprotect+0x78/0xc0 [ 31.248221] do_syscall_64+0x3f/0x90 [ 31.248726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.249398] [ 31.249616] Freed by task 212: [ 31.250009] kasan_save_stack+0x22/0x50 [ 31.250510] kasan_set_track+0x25/0x30 [ 31.251009] kasan_save_free_info+0x2b/0x50 [ 31.251566] __kasan_slab_free+0x10a/0x190 [ 31.252110] kmem_cache_free+0x10d/0x4d0 [ 31.252616] rcu_core+0x8c8/0x2860 [ 31.253063] __do_softirq+0x1b7/0x7d4 [ 31.253544] [ 31.253760] Last potentially related work creation: [ 31.254341] kasan_save_stack+0x22/0x50 [ 31.254850] __kasan_record_aux_stack+0x8e/0xa0 [ 31.255460] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.256119] remove_vma+0x139/0x170 [ 31.256574] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.257133] do_vmi_munmap+0x1f1/0x2b0 [ 31.257617] __vm_munmap+0x138/0x3a0 [ 31.258087] __x64_sys_munmap+0x59/0x80 [ 31.258582] do_syscall_64+0x3f/0x90 [ 31.259063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.259706] [ 31.259936] The buggy address belongs to the object at ffff888009c67828 [ 31.259936] which belongs to the cache vm_area_struct of size 168 [ 31.261403] The buggy address is located 88 bytes inside of [ 31.261403] freed 168-byte region [ffff888009c67828, ffff888009c678d0) [ 31.262805] [ 31.263085] The buggy address belongs to the physical page: [ 31.263973] page:0000000044c1c563 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9c67 [ 31.265388] memcg:ffff88800d9e3701 [ 31.265953] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.266877] page_type: 0xffffffff() [ 31.267485] raw: 0100000000000200 ffff8880087a0c80 ffffea0000609c80 dead000000000005 [ 31.268722] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9e3701 [ 31.269939] page dumped because: kasan: bad access detected [ 31.270818] [ 31.271107] Memory state around the buggy address: [ 31.271878] ffff888009c67780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.272975] ffff888009c67800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.274052] >ffff888009c67880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.275143] ^ [ 31.275660] ffff888009c67900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.276819] ffff888009c67980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.277824] ================================================================== [ 31.278872] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.313820] BUG: Bad rss-counter state mm:00000000ba06a27c type:MM_FILEPAGES val:33 [ 33.314925] BUG: Bad rss-counter state mm:00000000ba06a27c type:MM_ANONPAGES val:22 [ 33.826070] BUG: Bad rss-counter state mm:00000000f6e34fc1 type:MM_FILEPAGES val:33 [ 33.827694] BUG: Bad rss-counter state mm:00000000f6e34fc1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50949' (ECDSA) to the list of known hosts. 2023/06/21 04:57:24 fuzzer started 2023/06/21 04:57:24 dialing manager at localhost:36067 2023/06/21 04:57:24 checking machine... 2023/06/21 04:57:24 checking revisions... [ 34.477485] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:57:24 testing simple program... [ 34.522120] cgroup: Unknown subsys name 'net' [ 34.570108] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:57:24 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f217c937eb0 CR3=000000000e642000 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=2033323a37353a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a37353a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff812d8f13 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88801ca1f6a0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856d84b8 R15=0000000000000000 RIP=ffffffff8180f189 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 00007fef363f3900 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=00007ffed3629000 CR3=000000001811a000 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=6720646572637465733a4d41503d706f 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