[ 51.053999] BUG: Bad rss-counter state mm:00000000739d9be8 type:MM_FILEPAGES val:33 [ 51.055225] BUG: Bad rss-counter state mm:00000000739d9be8 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 51.153333] ================================================================== [ 51.154423] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.155548] Read of size 8 at addr ffff88801012a4e0 by task sshd/220 [ 51.156468] [ 51.156841] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.157880] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.159075] Call Trace: [ 51.159460] [ 51.159797] dump_stack_lvl+0x91/0xf0 [ 51.160316] print_report+0xcc/0x620 [ 51.160795] ? __virt_addr_valid+0x102/0x340 [ 51.161353] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.161976] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.162597] kasan_report+0xbe/0xf0 [ 51.163088] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.163708] vma_interval_tree_remove+0xc75/0xec0 [ 51.164317] vma_prepare+0xc54/0x11a0 [ 51.164797] __split_vma+0x5af/0x950 [ 51.165267] ? __pfx___split_vma+0x10/0x10 [ 51.165796] ? find_held_lock+0x2c/0x110 [ 51.166323] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.166897] ? lock_is_held_type+0x9f/0x120 [ 51.167438] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.168041] ? mtree_range_walk+0x632/0x900 [ 51.168600] ? mas_walk+0x5c7/0x7c0 [ 51.169069] do_vmi_munmap+0x1f1/0x2b0 [ 51.169567] mmap_region+0x1f9/0x2660 [ 51.170061] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.170575] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.171297] ? __pfx_lock_acquire+0x10/0x10 [ 51.171825] ? __pfx_mmap_region+0x10/0x10 [ 51.172350] ? security_mmap_addr+0x7d/0xa0 [ 51.172875] ? get_unmapped_area+0x1f5/0x3f0 [ 51.173423] do_mmap+0x854/0xf00 [ 51.173860] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.174350] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.174908] ksys_mmap_pgoff+0x3af/0x500 [ 51.175427] do_syscall_64+0x3f/0x90 [ 51.175911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.176552] RIP: 0033:0x7fc25ee75d82 [ 51.177008] 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 [ 51.179131] RSP: 002b:00007fffefd537e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.180045] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc25ee75d82 [ 51.180900] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc25e2af000 [ 51.181772] RBP: 00007fc25e2af000 R08: 0000000000000009 R09: 0000000000001000 [ 51.182630] R10: 0000000000000812 R11: 0000000000000206 R12: 000055683cfb9ec0 [ 51.183504] R13: 00007fffefd53800 R14: 00007fffefd53830 R15: 00007fffefd53b90 [ 51.184371] [ 51.184662] [ 51.184885] Allocated by task 213: [ 51.185319] kasan_save_stack+0x22/0x50 [ 51.185840] kasan_set_track+0x25/0x30 [ 51.186352] __kasan_slab_alloc+0x59/0x70 [ 51.186875] kmem_cache_alloc+0x16b/0x370 [ 51.187414] vm_area_dup+0x20/0x160 [ 51.187877] __split_vma+0x170/0x950 [ 51.188347] split_vma+0xc6/0x110 [ 51.188799] mprotect_fixup+0x8d2/0xb30 [ 51.189302] do_mprotect_pkey+0x87e/0xd40 [ 51.189827] __x64_sys_mprotect+0x78/0xc0 [ 51.190348] do_syscall_64+0x3f/0x90 [ 51.190820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.191473] [ 51.191687] Freed by task 213: [ 51.192087] kasan_save_stack+0x22/0x50 [ 51.192592] kasan_set_track+0x25/0x30 [ 51.193088] kasan_save_free_info+0x2b/0x50 [ 51.193614] __kasan_slab_free+0x10a/0x190 [ 51.194150] kmem_cache_free+0x10d/0x4d0 [ 51.194658] rcu_core+0x8c8/0x2860 [ 51.195104] __do_softirq+0x1b7/0x7d4 [ 51.195578] [ 51.195792] Last potentially related work creation: [ 51.196374] kasan_save_stack+0x22/0x50 [ 51.196883] __kasan_record_aux_stack+0x8e/0xa0 [ 51.197463] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.198191] remove_vma+0x139/0x170 [ 51.198648] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.199223] do_vmi_munmap+0x1f1/0x2b0 [ 51.199709] __vm_munmap+0x138/0x3a0 [ 51.200184] __x64_sys_munmap+0x59/0x80 [ 51.200676] do_syscall_64+0x3f/0x90 [ 51.201143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.201785] [ 51.202000] Second to last potentially related work creation: [ 51.202676] kasan_save_stack+0x22/0x50 [ 51.203187] __kasan_record_aux_stack+0x8e/0xa0 [ 51.203757] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.204400] remove_vma+0x139/0x170 [ 51.204852] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.205421] do_vmi_munmap+0x1f1/0x2b0 [ 51.205909] mmap_region+0x1f9/0x2660 [ 51.206384] do_mmap+0x854/0xf00 [ 51.206814] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.207325] ksys_mmap_pgoff+0x3af/0x500 [ 51.207824] do_syscall_64+0x3f/0x90 [ 51.208302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.208940] [ 51.209158] The buggy address belongs to the object at ffff88801012a488 [ 51.209158] which belongs to the cache vm_area_struct of size 168 [ 51.210620] The buggy address is located 88 bytes inside of [ 51.210620] freed 168-byte region [ffff88801012a488, ffff88801012a530) [ 51.212031] [ 51.212246] The buggy address belongs to the physical page: [ 51.212905] page:0000000016e85726 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1012a [ 51.214000] memcg:ffff88800cc91501 [ 51.214431] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.215089] page_type: 0xffffffff() [ 51.215550] raw: 0100000000000200 ffff88800879fc80 ffffea000035f640 dead000000000002 [ 51.216477] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cc91501 [ 51.217402] page dumped because: kasan: bad access detected [ 51.218065] [ 51.218286] Memory state around the buggy address: [ 51.218880] ffff88801012a380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 51.219776] ffff88801012a400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 51.220642] >ffff88801012a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.221487] ^ [ 51.222236] ffff88801012a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 51.223090] ffff88801012a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 51.223935] ================================================================== [ 51.225053] Disabling lock debugging due to kernel taint [ 53.829283] BUG: Bad rss-counter state mm:00000000bb6d9c75 type:MM_FILEPAGES val:33 [ 53.830461] BUG: Bad rss-counter state mm:00000000bb6d9c75 type:MM_ANONPAGES val:22 [ 54.232527] BUG: Bad rss-counter state mm:00000000aa3478c5 type:MM_FILEPAGES val:33 [ 54.233718] BUG: Bad rss-counter state mm:00000000aa3478c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18565' (ECDSA) to the list of known hosts. 2023/06/20 07:20:43 fuzzer started 2023/06/20 07:20:43 dialing manager at localhost:44161 2023/06/20 07:20:43 checking machine... 2023/06/20 07:20:43 checking revisions... [ 54.975478] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:20:43 testing simple program... [ 55.017518] cgroup: Unknown subsys name 'net' [ 55.069232] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:20:23 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000000 RCX=ffffffff816246ae RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffffea00006f5480 RSP=ffff888008d5fac0 R8 =0000000000000000 R9 =ffffed100fffbec5 R10=ffff88807ffdf62b R11=0000000000000128 R12=ffffea00006f54b4 R13=0000000000000000 R14=ffff88807ffdc000 R15=dffffc0000000000 RIP=ffffffff814c0388 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 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=00007f347de6d000 CR3=000000001a5b6000 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=f456d72e877c88449b066c4ef849436a XMM02=d309bff1bf7d3e1aeca3610dae93cc44 XMM03=c140c340e1c8d55927077faa592d38a1 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=0e0d0c0f0a09080b0605040702010003 XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=00000000000101f1 RSI=ffffffff821927d8 RDI=0000000000000007 RBP=ffff8880097701a0 RSP=ffff888008e6f7a0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f1 R11=0000000000000128 R12=00000000000101f1 R13=ffff888009770050 R14=ffff888009770048 R15=ffff888009770060 RIP=ffffffff821927de RFL=00000093 [--S-A-C] 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=00007ffed3a07688 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007f814d7175100000561bc54f9790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000