[ 31.056858] BUG: Bad rss-counter state mm:0000000076492a32 type:MM_FILEPAGES val:33 [ 31.058269] BUG: Bad rss-counter state mm:0000000076492a32 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.212182] ================================================================== [ 31.213103] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.214040] Read of size 8 at addr ffff888008ec24e0 by task sshd/220 [ 31.214894] [ 31.215147] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.216031] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.217024] Call Trace: [ 31.217351] [ 31.217635] dump_stack_lvl+0x91/0xf0 [ 31.218129] print_report+0xcc/0x620 [ 31.218616] ? __virt_addr_valid+0x102/0x340 [ 31.219170] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.219801] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.220420] kasan_report+0xbe/0xf0 [ 31.220898] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.221520] vma_interval_tree_remove+0xc75/0xec0 [ 31.222132] vma_prepare+0xc54/0x11a0 [ 31.222611] __split_vma+0x5af/0x950 [ 31.223086] ? __pfx___split_vma+0x10/0x10 [ 31.223620] ? find_held_lock+0x2c/0x110 [ 31.224151] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.224718] ? lock_is_held_type+0x9f/0x120 [ 31.225256] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.225868] ? mtree_range_walk+0x632/0x900 [ 31.226420] ? mas_walk+0x5c7/0x7c0 [ 31.226894] do_vmi_munmap+0x1f1/0x2b0 [ 31.227383] mmap_region+0x1f9/0x2660 [ 31.227893] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.228405] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.229124] ? __pfx_lock_acquire+0x10/0x10 [ 31.229660] ? __pfx_mmap_region+0x10/0x10 [ 31.230193] ? security_mmap_addr+0x7d/0xa0 [ 31.230733] ? get_unmapped_area+0x1f5/0x3f0 [ 31.231284] do_mmap+0x854/0xf00 [ 31.231730] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.232228] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.232792] ksys_mmap_pgoff+0x3af/0x500 [ 31.233301] do_syscall_64+0x3f/0x90 [ 31.233788] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.234438] RIP: 0033:0x7f9080205d82 [ 31.234896] 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 [ 31.237055] RSP: 002b:00007ffd11e725e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.237961] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9080205d82 [ 31.238811] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f907f63f000 [ 31.239667] RBP: 00007f907f63f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.240535] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556eed925ec0 [ 31.241381] R13: 00007ffd11e72600 R14: 00007ffd11e72630 R15: 00007ffd11e72990 [ 31.242239] [ 31.242532] [ 31.242747] Allocated by task 213: [ 31.243174] kasan_save_stack+0x22/0x50 [ 31.243692] kasan_set_track+0x25/0x30 [ 31.244187] __kasan_slab_alloc+0x59/0x70 [ 31.244712] kmem_cache_alloc+0x16b/0x370 [ 31.245229] vm_area_dup+0x20/0x160 [ 31.245687] __split_vma+0x170/0x950 [ 31.246158] split_vma+0xc6/0x110 [ 31.246598] mprotect_fixup+0x8d2/0xb30 [ 31.247098] do_mprotect_pkey+0x87e/0xd40 [ 31.247616] __x64_sys_mprotect+0x78/0xc0 [ 31.248142] do_syscall_64+0x3f/0x90 [ 31.248619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.249263] [ 31.249478] Freed by task 213: [ 31.249870] kasan_save_stack+0x22/0x50 [ 31.250374] kasan_set_track+0x25/0x30 [ 31.250867] kasan_save_free_info+0x2b/0x50 [ 31.251398] __kasan_slab_free+0x10a/0x190 [ 31.251942] kmem_cache_free+0x10d/0x4d0 [ 31.252451] rcu_core+0x8c8/0x2860 [ 31.252900] __do_softirq+0x1b7/0x7d4 [ 31.253381] [ 31.253601] Last potentially related work creation: [ 31.254188] kasan_save_stack+0x22/0x50 [ 31.254693] __kasan_record_aux_stack+0x8e/0xa0 [ 31.255267] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.255923] remove_vma+0x139/0x170 [ 31.256379] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.256942] do_vmi_munmap+0x1f1/0x2b0 [ 31.257433] __vm_munmap+0x138/0x3a0 [ 31.257904] __x64_sys_munmap+0x59/0x80 [ 31.258400] do_syscall_64+0x3f/0x90 [ 31.258876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.259520] [ 31.259743] The buggy address belongs to the object at ffff888008ec2488 [ 31.259743] which belongs to the cache vm_area_struct of size 168 [ 31.261213] The buggy address is located 88 bytes inside of [ 31.261213] freed 168-byte region [ffff888008ec2488, ffff888008ec2530) [ 31.262629] [ 31.262845] The buggy address belongs to the physical page: [ 31.263513] page:000000005073e617 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8ec2 [ 31.264620] memcg:ffff88800dc5cf01 [ 31.265051] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.265697] page_type: 0xffffffff() [ 31.266147] raw: 0100000000000200 ffff8880087a0c80 ffffea000031c6c0 dead000000000008 [ 31.267069] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc5cf01 [ 31.268002] page dumped because: kasan: bad access detected [ 31.268661] [ 31.268877] Memory state around the buggy address: [ 31.269459] ffff888008ec2380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.270320] ffff888008ec2400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.271181] >ffff888008ec2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.272036] ^ [ 31.272790] ffff888008ec2500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.273651] ffff888008ec2580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.274504] ================================================================== [ 31.275565] Disabling lock debugging due to kernel taint [ 33.306399] BUG: Bad rss-counter state mm:00000000624924ad type:MM_FILEPAGES val:33 [ 33.307378] BUG: Bad rss-counter state mm:00000000624924ad type:MM_ANONPAGES val:22 [ 33.821339] BUG: Bad rss-counter state mm:000000007f8f9f8f type:MM_FILEPAGES val:33 [ 33.822536] BUG: Bad rss-counter state mm:000000007f8f9f8f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1401' (ECDSA) to the list of known hosts. 2023/06/20 21:02:58 fuzzer started 2023/06/20 21:02:58 dialing manager at localhost:36067 2023/06/20 21:02:58 checking machine... 2023/06/20 21:02:58 checking revisions... [ 34.525603] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:02:58 testing simple program... [ 34.577958] cgroup: Unknown subsys name 'net' [ 34.640204] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:02:58 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=00007fff52075fe8 CR3=0000000005482000 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=00007f3fe08b1510000055da3a100790 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 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88800ec6dc00 RCX=0000000000000000 RDX=ffff8880102e51c0 RSI=ffffffff8119cf74 RDI=ffff8880102e51ec RBP=0000000000000000 RSP=ffff88801477f898 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=00000000000000e5 R14=ffff88801477fb80 R15=ffff8880102e51c0 RIP=ffffffff8369e2e0 RFL=00000293 [--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 00007f869d78b900 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=00007fc2d7d64650 CR3=000000000e1e6000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=9a489a81504c20c500000000000ae988 XMM05=23015670fe0712370000000000131c00 XMM06=4fda316b135da52b0000000000130680 XMM07=fb795ef6d65770560000000000120910 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000