[ 35.067873] BUG: Bad rss-counter state mm:0000000064b8de8a type:MM_FILEPAGES val:33 [ 35.069543] BUG: Bad rss-counter state mm:0000000064b8de8a type:MM_ANONPAGES val:22 [ 35.218905] ================================================================== [ 35.219519] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.220148] Read of size 8 at addr ffff888016d4a798 by task sshd/221 [ 35.220657] [ 35.220806] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.221369] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.221998] Call Trace: [ 35.222404] [ 35.222596] dump_stack_lvl+0x91/0xf0 [ 35.223054] print_report+0xcc/0x620 [ 35.223382] ? __virt_addr_valid+0x102/0x340 [ 35.223743] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.224146] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.224548] kasan_report+0xbe/0xf0 [ 35.224870] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.225588] vma_interval_tree_remove+0xc75/0xec0 [ 35.225994] vma_prepare+0xc54/0x11a0 [ 35.226362] __split_vma+0x5af/0x950 [ 35.226687] ? __pfx___split_vma+0x10/0x10 [ 35.227044] ? find_held_lock+0x2c/0x110 [ 35.227393] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.227775] ? lock_is_held_type+0x9f/0x120 [ 35.228139] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.228545] ? mtree_range_walk+0x632/0x900 [ 35.228922] ? mas_walk+0x5c7/0x7c0 [ 35.229247] do_vmi_munmap+0x1f1/0x2b0 [ 35.229584] mmap_region+0x1f9/0x2660 [ 35.229914] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.230496] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.230977] ? __pfx_lock_acquire+0x10/0x10 [ 35.231345] ? __pfx_mmap_region+0x10/0x10 [ 35.231701] ? security_mmap_addr+0x7d/0xa0 [ 35.232062] ? get_unmapped_area+0x1f5/0x3f0 [ 35.232438] do_mmap+0x854/0xf00 [ 35.232738] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.233078] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.233453] ksys_mmap_pgoff+0x3af/0x500 [ 35.233794] do_syscall_64+0x3f/0x90 [ 35.234115] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.234650] RIP: 0033:0x7f5009d72d82 [ 35.234956] 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 [ 35.236336] RSP: 002b:00007ffee2a8d8d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.236920] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5009d72d82 [ 35.237482] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f50091ac000 [ 35.238044] RBP: 00007f50091ac000 R08: 0000000000000009 R09: 0000000000001000 [ 35.238712] R10: 0000000000000812 R11: 0000000000000206 R12: 00005571dfd85ec0 [ 35.239275] R13: 00007ffee2a8d8f0 R14: 00007ffee2a8d920 R15: 00007ffee2a8dc80 [ 35.239837] [ 35.240039] [ 35.240183] Allocated by task 214: [ 35.240471] kasan_save_stack+0x22/0x50 [ 35.240811] kasan_set_track+0x25/0x30 [ 35.241145] __kasan_slab_alloc+0x59/0x70 [ 35.241497] kmem_cache_alloc+0x16b/0x370 [ 35.241844] vm_area_dup+0x20/0x160 [ 35.242154] __split_vma+0x170/0x950 [ 35.242576] split_vma+0xc6/0x110 [ 35.242875] mprotect_fixup+0x8d2/0xb30 [ 35.243222] do_mprotect_pkey+0x87e/0xd40 [ 35.243571] __x64_sys_mprotect+0x78/0xc0 [ 35.243919] do_syscall_64+0x3f/0x90 [ 35.244224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.244636] [ 35.244784] Freed by task 214: [ 35.245049] kasan_save_stack+0x22/0x50 [ 35.245390] kasan_set_track+0x25/0x30 [ 35.245721] kasan_save_free_info+0x2b/0x50 [ 35.246081] __kasan_slab_free+0x10a/0x190 [ 35.246584] kmem_cache_free+0x10d/0x4d0 [ 35.246927] rcu_core+0x8c8/0x2860 [ 35.247239] __do_softirq+0x1b7/0x7d4 [ 35.247562] [ 35.247711] Last potentially related work creation: [ 35.248099] kasan_save_stack+0x22/0x50 [ 35.248437] __kasan_record_aux_stack+0x8e/0xa0 [ 35.248823] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.249262] remove_vma+0x139/0x170 [ 35.249569] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.249943] do_vmi_munmap+0x1f1/0x2b0 [ 35.250366] __vm_munmap+0x138/0x3a0 [ 35.250685] __x64_sys_munmap+0x59/0x80 [ 35.251021] do_syscall_64+0x3f/0x90 [ 35.251350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.251773] [ 35.251914] The buggy address belongs to the object at ffff888016d4a740 [ 35.251914] which belongs to the cache vm_area_struct of size 168 [ 35.252852] The buggy address is located 88 bytes inside of [ 35.252852] freed 168-byte region [ffff888016d4a740, ffff888016d4a7e8) [ 35.253764] [ 35.253913] The buggy address belongs to the physical page: [ 35.254455] page:00000000c7c685d6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d4a [ 35.255180] memcg:ffff88800eb48501 [ 35.255465] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.255928] page_type: 0xffffffff() [ 35.256236] raw: 0100000000000200 ffff88800879fc80 ffffea00003b7100 dead000000000005 [ 35.256841] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb48501 [ 35.257438] page dumped because: kasan: bad access detected [ 35.257876] [ 35.258022] Memory state around the buggy address: [ 35.258500] ffff888016d4a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.259072] ffff888016d4a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.259640] >ffff888016d4a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.260205] ^ [ 35.260534] ffff888016d4a800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 35.261100] ffff888016d4a880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 35.261655] ================================================================== [ 35.262596] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 37.527593] BUG: Bad rss-counter state mm:0000000045723612 type:MM_FILEPAGES val:33 [ 37.528244] BUG: Bad rss-counter state mm:0000000045723612 type:MM_ANONPAGES val:22 [ 38.247294] BUG: Bad rss-counter state mm:000000007b674258 type:MM_FILEPAGES val:33 [ 38.248699] BUG: Bad rss-counter state mm:000000007b674258 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10517' (ECDSA) to the list of known hosts. 2023/06/20 08:02:21 fuzzer started 2023/06/20 08:02:22 dialing manager at localhost:44161 2023/06/20 08:02:22 checking machine... 2023/06/20 08:02:22 checking revisions... [ 39.057663] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:02:22 testing simple program... [ 39.101094] cgroup: Unknown subsys name 'net' [ 39.136168] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:02:17 Registers: info registers vcpu 0 RAX=00000000000000a1 RBX=ffffc90000663818 RCX=0000000000000100 RDX=1ffff110012fe6c3 RSI=ffffffff83018be6 RDI=ffff8880097f362a RBP=0000000000000000 RSP=ffff888008d7e898 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000128 R12=0000000000000018 R13=ffff88800b8cfa00 R14=ffff88800f3e8000 R15=ffff8880097f3600 RIP=ffffffff83018c7b 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=00007fff61eceff8 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=00007f92b6e69510000055fa33de2790 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=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880159751c0 RSI=ffffffff81166bdd RDI=0000000000000005 RBP=ffff88800dd45bc8 RSP=ffff888018e07998 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff8880167b9d98 R13=dffffc0000000000 R14=ffff8880199399b0 R15=0000000000000000 RIP=ffffffff81166bdd 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 00007f01aff38900 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=00007f7f062eb1e0 CR3=000000000e530000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000