[ 27.052130] BUG: Bad rss-counter state mm:000000009707994e type:MM_FILEPAGES val:33 [ 27.053987] BUG: Bad rss-counter state mm:000000009707994e type:MM_ANONPAGES val:22 [ 27.211236] ================================================================== [ 27.212223] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.213370] Read of size 8 at addr ffff88800e405140 by task sshd/220 [ 27.214227] [ 27.214456] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.215383] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.216519] Call Trace: [ 27.216881] [ 27.217183] dump_stack_lvl+0x91/0xf0 [ 27.217723] print_report+0xcc/0x620 [ 27.218276] ? __virt_addr_valid+0x102/0x340 [ 27.218887] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.219540] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.220188] kasan_report+0xbe/0xf0 [ 27.220676] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.221409] vma_interval_tree_remove+0xc75/0xec0 [ 27.222101] vma_prepare+0xc54/0x11a0 [ 27.222645] __split_vma+0x5af/0x950 [ 27.223153] ? __pfx___split_vma+0x10/0x10 [ 27.223693] ? find_held_lock+0x2c/0x110 [ 27.224235] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.224815] ? lock_is_held_type+0x9f/0x120 [ 27.225366] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.225983] ? mtree_range_walk+0x632/0x900 [ 27.226559] ? mas_walk+0x5c7/0x7c0 [ 27.227052] do_vmi_munmap+0x1f1/0x2b0 [ 27.227560] mmap_region+0x1f9/0x2660 [ 27.228064] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.228584] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.229332] ? __pfx_lock_acquire+0x10/0x10 [ 27.229877] ? __pfx_mmap_region+0x10/0x10 [ 27.230423] ? security_mmap_addr+0x7d/0xa0 [ 27.230978] ? get_unmapped_area+0x1f5/0x3f0 [ 27.231545] do_mmap+0x854/0xf00 [ 27.231996] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.232511] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.233101] ksys_mmap_pgoff+0x3af/0x500 [ 27.233638] do_syscall_64+0x3f/0x90 [ 27.234137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.234816] RIP: 0033:0x7f51aea35d82 [ 27.235297] 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 [ 27.237509] RSP: 002b:00007fff0e191b08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.238455] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f51aea35d82 [ 27.239354] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f51ade6f000 [ 27.240233] RBP: 00007f51ade6f000 R08: 0000000000000009 R09: 0000000000001000 [ 27.241107] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556edf1a2ec0 [ 27.241967] R13: 00007fff0e191b20 R14: 00007fff0e191b50 R15: 00007fff0e191eb0 [ 27.242863] [ 27.243169] [ 27.243392] Allocated by task 211: [ 27.243827] kasan_save_stack+0x22/0x50 [ 27.244350] kasan_set_track+0x25/0x30 [ 27.244866] __kasan_slab_alloc+0x59/0x70 [ 27.245403] kmem_cache_alloc+0x16b/0x370 [ 27.245940] vm_area_dup+0x20/0x160 [ 27.246406] __split_vma+0x170/0x950 [ 27.246893] split_vma+0xc6/0x110 [ 27.247348] mprotect_fixup+0x8d2/0xb30 [ 27.247860] do_mprotect_pkey+0x87e/0xd40 [ 27.248394] __x64_sys_mprotect+0x78/0xc0 [ 27.248924] do_syscall_64+0x3f/0x90 [ 27.249402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.250051] [ 27.250265] Freed by task 211: [ 27.250659] kasan_save_stack+0x22/0x50 [ 27.251196] kasan_set_track+0x25/0x30 [ 27.251704] kasan_save_free_info+0x2b/0x50 [ 27.252255] __kasan_slab_free+0x10a/0x190 [ 27.252796] kmem_cache_free+0x10d/0x4d0 [ 27.253320] rcu_core+0x8c8/0x2860 [ 27.253760] __do_softirq+0x1b7/0x7d4 [ 27.254242] [ 27.254470] Last potentially related work creation: [ 27.255071] kasan_save_stack+0x22/0x50 [ 27.255591] __kasan_record_aux_stack+0x8e/0xa0 [ 27.256177] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.256833] remove_vma+0x139/0x170 [ 27.257296] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.257864] do_vmi_munmap+0x1f1/0x2b0 [ 27.258359] __vm_munmap+0x138/0x3a0 [ 27.258846] __x64_sys_munmap+0x59/0x80 [ 27.259357] do_syscall_64+0x3f/0x90 [ 27.259833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.260492] [ 27.260711] Second to last potentially related work creation: [ 27.261413] kasan_save_stack+0x22/0x50 [ 27.261939] __kasan_record_aux_stack+0x8e/0xa0 [ 27.262527] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.263201] remove_vma+0x139/0x170 [ 27.263659] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.264223] do_vmi_munmap+0x1f1/0x2b0 [ 27.264724] mmap_region+0x1f9/0x2660 [ 27.265218] do_mmap+0x854/0xf00 [ 27.265663] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.266166] ksys_mmap_pgoff+0x3af/0x500 [ 27.266688] do_syscall_64+0x3f/0x90 [ 27.267161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.267805] [ 27.268020] The buggy address belongs to the object at ffff88800e4050e8 [ 27.268020] which belongs to the cache vm_area_struct of size 168 [ 27.269522] The buggy address is located 88 bytes inside of [ 27.269522] freed 168-byte region [ffff88800e4050e8, ffff88800e405190) [ 27.270993] [ 27.271210] The buggy address belongs to the physical page: [ 27.271900] page:00000000c2013bde refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe405 [ 27.273028] memcg:ffff88800cb76e01 [ 27.273475] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 27.274189] page_type: 0xffffffff() [ 27.274640] raw: 0100000000000200 ffff88800879fc80 ffffea000039be80 dead000000000003 [ 27.275579] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb76e01 [ 27.276494] page dumped because: kasan: bad access detected [ 27.277175] [ 27.277400] Memory state around the buggy address: [ 27.278001] ffff88800e405000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.278897] ffff88800e405080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 27.279763] >ffff88800e405100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.280625] ^ [ 27.281297] ffff88800e405180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 27.282226] ffff88800e405200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 27.283128] ================================================================== [ 27.284214] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.479847] BUG: Bad rss-counter state mm:00000000e9b349c4 type:MM_FILEPAGES val:33 [ 29.481106] BUG: Bad rss-counter state mm:00000000e9b349c4 type:MM_ANONPAGES val:22 [ 29.901409] BUG: Bad rss-counter state mm:00000000157939c7 type:MM_FILEPAGES val:33 [ 29.902415] BUG: Bad rss-counter state mm:00000000157939c7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53336' (ECDSA) to the list of known hosts. 2023/06/19 23:17:34 fuzzer started 2023/06/19 23:17:34 dialing manager at localhost:44161 2023/06/19 23:17:34 checking machine... 2023/06/19 23:17:34 checking revisions... [ 30.571604] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:17:34 testing simple program... [ 30.612628] cgroup: Unknown subsys name 'net' [ 30.670368] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:17:31 Registers: info registers vcpu 0 RAX=1ffffffff0c11183 RBX=0000000000000002 RCX=ffffffff86088c1a RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff88806ce09b00 RBP=ffff88806ce09af0 RSP=ffff88806ce099d8 R8 =ffffffff86088c1e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09b40 R15=ffff88806ce09a98 RIP=ffffffff81131118 RFL=00000213 [----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 00007facb5fa3900 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=00007facb6558650 CR3=000000000c650000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110028988ab RBX=ffff8880144c4528 RCX=1ffff11001adb686 RDX=dffffc0000000000 RSI=ffff888016acf0d0 RDI=ffff8880144c4558 RBP=ffff88800d6db400 RSP=ffff888016ab7c48 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6c88 R12=ffff888016acf000 R13=0000000000000000 R14=ffff888009726048 R15=ffff888009726000 RIP=ffffffff818474fe RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 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=00007f2be1717288 CR3=0000000009ae0000 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=6f732e616d7a6c62696c2f756e672d78 XMM02=00352e6f732e616d7a6c62696c2f756e XMM03=672d78756e696c2d34365f3638782f62 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000