[ 30.020764] BUG: Bad rss-counter state mm:0000000080d45fce type:MM_FILEPAGES val:33 [ 30.022299] BUG: Bad rss-counter state mm:0000000080d45fce type:MM_ANONPAGES val:22 [ 30.179185] ================================================================== [ 30.180088] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.181028] Read of size 8 at addr ffff88800f31e140 by task sshd/218 [ 30.181801] [ 30.182018] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.183024] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.184001] Call Trace: [ 30.184328] [ 30.184616] dump_stack_lvl+0x91/0xf0 [ 30.185116] print_report+0xcc/0x620 [ 30.185599] ? __virt_addr_valid+0x102/0x340 [ 30.186179] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.186792] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.187428] kasan_report+0xbe/0xf0 [ 30.187904] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.188529] vma_interval_tree_remove+0xc75/0xec0 [ 30.189144] vma_prepare+0xc54/0x11a0 [ 30.189635] __split_vma+0x5af/0x950 [ 30.190125] ? __pfx___split_vma+0x10/0x10 [ 30.190659] ? find_held_lock+0x2c/0x110 [ 30.191180] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.191748] ? lock_is_held_type+0x9f/0x120 [ 30.192299] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.192909] ? mtree_range_walk+0x632/0x900 [ 30.193474] ? mas_walk+0x5c7/0x7c0 [ 30.193952] do_vmi_munmap+0x1f1/0x2b0 [ 30.194459] mmap_region+0x1f9/0x2660 [ 30.194947] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.195467] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.196200] ? __pfx_lock_acquire+0x10/0x10 [ 30.196733] ? __pfx_mmap_region+0x10/0x10 [ 30.197261] ? security_mmap_addr+0x7d/0xa0 [ 30.197798] ? get_unmapped_area+0x1f5/0x3f0 [ 30.198357] do_mmap+0x854/0xf00 [ 30.198798] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.199289] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.199856] ksys_mmap_pgoff+0x3af/0x500 [ 30.200367] do_syscall_64+0x3f/0x90 [ 30.200857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.201510] RIP: 0033:0x7f922d6c9d82 [ 30.201967] 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 [ 30.204122] RSP: 002b:00007fffb0e80ca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.205023] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f922d6c9d82 [ 30.205884] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f922cb03000 [ 30.206769] RBP: 00007f922cb03000 R08: 0000000000000009 R09: 0000000000001000 [ 30.207621] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bc6d85eec0 [ 30.208471] R13: 00007fffb0e80cc0 R14: 00007fffb0e80cf0 R15: 00007fffb0e81050 [ 30.209333] [ 30.209626] [ 30.209844] Allocated by task 211: [ 30.210284] kasan_save_stack+0x22/0x50 [ 30.210793] kasan_set_track+0x25/0x30 [ 30.211293] __kasan_slab_alloc+0x59/0x70 [ 30.211831] kmem_cache_alloc+0x16b/0x370 [ 30.212349] vm_area_dup+0x20/0x160 [ 30.212808] __split_vma+0x170/0x950 [ 30.213285] split_vma+0xc6/0x110 [ 30.213719] mprotect_fixup+0x8d2/0xb30 [ 30.214239] do_mprotect_pkey+0x87e/0xd40 [ 30.214781] __x64_sys_mprotect+0x78/0xc0 [ 30.215320] do_syscall_64+0x3f/0x90 [ 30.215819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.216486] [ 30.216707] Freed by task 211: [ 30.217113] kasan_save_stack+0x22/0x50 [ 30.217643] kasan_set_track+0x25/0x30 [ 30.218180] kasan_save_free_info+0x2b/0x50 [ 30.218745] __kasan_slab_free+0x10a/0x190 [ 30.219299] kmem_cache_free+0x10d/0x4d0 [ 30.219826] rcu_core+0x8c8/0x2860 [ 30.220285] __do_softirq+0x1b7/0x7d4 [ 30.220777] [ 30.220991] Last potentially related work creation: [ 30.221608] kasan_save_stack+0x22/0x50 [ 30.222122] __kasan_record_aux_stack+0x8e/0xa0 [ 30.222697] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.223365] remove_vma+0x139/0x170 [ 30.223821] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.224384] do_vmi_munmap+0x1f1/0x2b0 [ 30.224874] __vm_munmap+0x138/0x3a0 [ 30.225358] __x64_sys_munmap+0x59/0x80 [ 30.225858] do_syscall_64+0x3f/0x90 [ 30.226355] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.227009] [ 30.227237] Second to last potentially related work creation: [ 30.227929] kasan_save_stack+0x22/0x50 [ 30.228440] __kasan_record_aux_stack+0x8e/0xa0 [ 30.229026] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.229686] remove_vma+0x139/0x170 [ 30.230156] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.230733] do_vmi_munmap+0x1f1/0x2b0 [ 30.231230] mmap_region+0x1f9/0x2660 [ 30.231710] do_mmap+0x854/0xf00 [ 30.232147] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.232660] ksys_mmap_pgoff+0x3af/0x500 [ 30.233171] do_syscall_64+0x3f/0x90 [ 30.233646] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.234291] [ 30.234512] The buggy address belongs to the object at ffff88800f31e0e8 [ 30.234512] which belongs to the cache vm_area_struct of size 168 [ 30.235995] The buggy address is located 88 bytes inside of [ 30.235995] freed 168-byte region [ffff88800f31e0e8, ffff88800f31e190) [ 30.237416] [ 30.237631] The buggy address belongs to the physical page: [ 30.238312] page:000000007cdeaa20 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf31e [ 30.239407] memcg:ffff888016608e01 [ 30.239831] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.240485] page_type: 0xffffffff() [ 30.240937] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c9500 0000000000000002 [ 30.241865] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016608e01 [ 30.242798] page dumped because: kasan: bad access detected [ 30.243484] [ 30.243699] Memory state around the buggy address: [ 30.244292] ffff88800f31e000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.245159] ffff88800f31e080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.246022] >ffff88800f31e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.246899] ^ [ 30.247545] ffff88800f31e180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 30.248398] ffff88800f31e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.249262] ================================================================== [ 30.250340] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.169405] BUG: Bad rss-counter state mm:00000000df5c865f type:MM_FILEPAGES val:33 [ 32.170481] BUG: Bad rss-counter state mm:00000000df5c865f type:MM_ANONPAGES val:22 [ 32.670542] BUG: Bad rss-counter state mm:000000000a6fca38 type:MM_FILEPAGES val:33 [ 32.671696] BUG: Bad rss-counter state mm:000000000a6fca38 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42350' (ECDSA) to the list of known hosts. 2023/06/21 02:37:22 fuzzer started 2023/06/21 02:37:22 dialing manager at localhost:36067 2023/06/21 02:37:22 checking machine... 2023/06/21 02:37:22 checking revisions... [ 33.415542] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:37:22 testing simple program... [ 33.463345] cgroup: Unknown subsys name 'net' [ 33.518955] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:37:22 Registers: info registers vcpu 0 RAX=00007f15650b6ba0 RBX=0000000000000000 RCX=0000000000000d68 RDX=00007f15650b7608 RSI=00007f15650b68a0 RDI=00007f1565632a84 RBP=00007ffff12bae90 RSP=00007ffff12ba940 R8 =0000000000000000 R9 =0000000000000000 R10=00005652804b01e0 R11=0000000000000202 R12=00007ffff12baea0 R13=00007f1565632a84 R14=00007ffff12bafe0 R15=0000000000008000 RIP=00007f1564f60d54 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1564b03900 00000000 00000000 GS =0000 0000000000000000 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=00007f12957c0e18 CR3=0000000015fba000 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=25252525252525252525252525252525 XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=707465675f6c697475646f6d6d61705f XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f15650bb0b0 CR3=000000000d638000 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=2032323a37333a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a37333a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000