[ 24.016488] BUG: Bad rss-counter state mm:00000000f2123792 type:MM_FILEPAGES val:33 [ 24.017444] BUG: Bad rss-counter state mm:00000000f2123792 type:MM_ANONPAGES val:22 [ 24.203896] ================================================================== [ 24.205002] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.206171] Read of size 8 at addr ffff88801ab64df0 by task sshd/221 [ 24.207277] [ 24.207533] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.208396] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.209382] Call Trace: [ 24.209700] [ 24.209988] dump_stack_lvl+0x91/0xf0 [ 24.210493] print_report+0xcc/0x620 [ 24.210977] ? __virt_addr_valid+0x102/0x340 [ 24.211529] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.212148] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.212763] kasan_report+0xbe/0xf0 [ 24.213241] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.213857] vma_interval_tree_remove+0xc75/0xec0 [ 24.214462] vma_prepare+0xc54/0x11a0 [ 24.214942] __split_vma+0x5af/0x950 [ 24.215409] ? __pfx___split_vma+0x10/0x10 [ 24.215938] ? find_held_lock+0x2c/0x110 [ 24.216459] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.217016] ? lock_is_held_type+0x9f/0x120 [ 24.217550] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.218174] ? mtree_range_walk+0x632/0x900 [ 24.218729] ? mas_walk+0x5c7/0x7c0 [ 24.219206] do_vmi_munmap+0x1f1/0x2b0 [ 24.219700] mmap_region+0x1f9/0x2660 [ 24.220176] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.220685] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.221398] ? __pfx_lock_acquire+0x10/0x10 [ 24.221926] ? __pfx_mmap_region+0x10/0x10 [ 24.222459] ? security_mmap_addr+0x7d/0xa0 [ 24.222984] ? get_unmapped_area+0x1f5/0x3f0 [ 24.223528] do_mmap+0x854/0xf00 [ 24.223972] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.224464] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.225023] ksys_mmap_pgoff+0x3af/0x500 [ 24.225527] do_syscall_64+0x3f/0x90 [ 24.226012] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.226678] RIP: 0033:0x7f856598fd82 [ 24.227134] 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 [ 24.229257] RSP: 002b:00007fff7a487ed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.230172] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f856598fd82 [ 24.231017] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8564dc9000 [ 24.231853] RBP: 00007f8564dc9000 R08: 0000000000000009 R09: 0000000000001000 [ 24.232697] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557798500d90 [ 24.233582] R13: 00007fff7a487ef0 R14: 00007fff7a487f20 R15: 00007fff7a488280 [ 24.234468] [ 24.234766] [ 24.234990] Allocated by task 208: [ 24.235430] kasan_save_stack+0x22/0x50 [ 24.235947] kasan_set_track+0x25/0x30 [ 24.236455] __kasan_slab_alloc+0x59/0x70 [ 24.237002] kmem_cache_alloc+0x16b/0x370 [ 24.237541] vm_area_dup+0x20/0x160 [ 24.238021] __split_vma+0x170/0x950 [ 24.238540] split_vma+0xc6/0x110 [ 24.239001] mprotect_fixup+0x8d2/0xb30 [ 24.239522] do_mprotect_pkey+0x87e/0xd40 [ 24.240064] __x64_sys_mprotect+0x78/0xc0 [ 24.240604] do_syscall_64+0x3f/0x90 [ 24.241092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.241757] [ 24.241986] Freed by task 208: [ 24.242403] kasan_save_stack+0x22/0x50 [ 24.242918] kasan_set_track+0x25/0x30 [ 24.243431] kasan_save_free_info+0x2b/0x50 [ 24.243971] __kasan_slab_free+0x10a/0x190 [ 24.244537] kmem_cache_free+0x10d/0x4d0 [ 24.245064] rcu_core+0x8c8/0x2860 [ 24.245512] __do_softirq+0x1b7/0x7d4 [ 24.245988] [ 24.246221] Last potentially related work creation: [ 24.246805] kasan_save_stack+0x22/0x50 [ 24.247333] __kasan_record_aux_stack+0x8e/0xa0 [ 24.247930] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.248598] remove_vma+0x139/0x170 [ 24.249055] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.249610] do_vmi_munmap+0x1f1/0x2b0 [ 24.250092] __vm_munmap+0x138/0x3a0 [ 24.250571] __x64_sys_munmap+0x59/0x80 [ 24.251081] do_syscall_64+0x3f/0x90 [ 24.251564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.252205] [ 24.252418] The buggy address belongs to the object at ffff88801ab64d98 [ 24.252418] which belongs to the cache vm_area_struct of size 168 [ 24.253891] The buggy address is located 88 bytes inside of [ 24.253891] freed 168-byte region [ffff88801ab64d98, ffff88801ab64e40) [ 24.255324] [ 24.255540] The buggy address belongs to the physical page: [ 24.256201] page:00000000027252e2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ab64 [ 24.257285] memcg:ffff88801aaeeb01 [ 24.257710] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.258362] page_type: 0xffffffff() [ 24.258806] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.259721] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801aaeeb01 [ 24.260624] page dumped because: kasan: bad access detected [ 24.261277] [ 24.261490] Memory state around the buggy address: [ 24.262070] ffff88801ab64c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 24.262939] ffff88801ab64d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 24.263794] >ffff88801ab64d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.264636] ^ [ 24.265437] ffff88801ab64e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.266301] ffff88801ab64e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.267152] ================================================================== [ 24.268307] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.232563] BUG: Bad rss-counter state mm:00000000a7a152dc type:MM_FILEPAGES val:33 [ 26.233421] BUG: Bad rss-counter state mm:00000000a7a152dc type:MM_ANONPAGES val:22 [ 26.796596] BUG: Bad rss-counter state mm:00000000cc6809a9 type:MM_FILEPAGES val:33 [ 26.797751] BUG: Bad rss-counter state mm:00000000cc6809a9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40152' (ECDSA) to the list of known hosts. 2023/06/20 19:56:04 fuzzer started 2023/06/20 19:56:04 dialing manager at localhost:36067 2023/06/20 19:56:04 checking machine... 2023/06/20 19:56:04 checking revisions... [ 27.466481] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:56:04 testing simple program... [ 27.516668] cgroup: Unknown subsys name 'net' [ 27.578498] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:56:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000008e RCX=ffffffff81630d5a RDX=ffff88800e723680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880164b7990 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffffea0000693300 R13=0000000000000001 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c0860 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 00007f302d136700 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=00007f75ad8a40b0 CR3=000000000e03e000 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=2033303a36353a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a36353a3931203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff888018217938 RCX=ffffffff844f63d2 RDX=0000000000000000 RSI=0000000000000002 RDI=0000000000000007 RBP=0000000000000000 RSP=ffff888018217870 R8 =0000000000000007 R9 =0000000000000002 R10=0000000000000000 R11=0000000000000000 R12=ffff888019303180 R13=ffffea00006cfdc0 R14=0000000000000000 R15=ffff8880193e4a38 RIP=ffffffff814c0250 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 00007f75ad2ec900 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=00007ffd9fe29000 CR3=000000000c548000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000