syzkaller login: [ 29.024084] BUG: Bad rss-counter state mm:0000000089caf412 type:MM_FILEPAGES val:33 [ 29.025450] BUG: Bad rss-counter state mm:0000000089caf412 type:MM_ANONPAGES val:22 [ 29.189619] ================================================================== [ 29.190613] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.191649] Read of size 8 at addr ffff888018e8a798 by task sshd/220 [ 29.192574] [ 29.192811] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.193752] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.194844] Call Trace: [ 29.195192] [ 29.195525] dump_stack_lvl+0x91/0xf0 [ 29.196059] print_report+0xcc/0x620 [ 29.196583] ? __virt_addr_valid+0x102/0x340 [ 29.197187] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.197866] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.198537] kasan_report+0xbe/0xf0 [ 29.199055] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.199744] vma_interval_tree_remove+0xc75/0xec0 [ 29.200406] vma_prepare+0xc54/0x11a0 [ 29.200930] __split_vma+0x5af/0x950 [ 29.201449] ? __pfx___split_vma+0x10/0x10 [ 29.202032] ? find_held_lock+0x2c/0x110 [ 29.202602] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.203222] ? lock_is_held_type+0x9f/0x120 [ 29.203825] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.204485] ? mtree_range_walk+0x632/0x900 [ 29.205085] ? mas_walk+0x5c7/0x7c0 [ 29.205606] do_vmi_munmap+0x1f1/0x2b0 [ 29.206145] mmap_region+0x1f9/0x2660 [ 29.206680] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.207237] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.208037] ? __pfx_lock_acquire+0x10/0x10 [ 29.208623] ? __pfx_mmap_region+0x10/0x10 [ 29.209200] ? security_mmap_addr+0x7d/0xa0 [ 29.209784] ? get_unmapped_area+0x1f5/0x3f0 [ 29.210388] do_mmap+0x854/0xf00 [ 29.210872] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.211418] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.212033] ksys_mmap_pgoff+0x3af/0x500 [ 29.212588] do_syscall_64+0x3f/0x90 [ 29.213113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.213817] RIP: 0033:0x7faeab913d82 [ 29.214321] 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 [ 29.216656] RSP: 002b:00007ffc8c71fdf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.217650] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faeab913d82 [ 29.218576] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faeaad4d000 [ 29.219523] RBP: 00007faeaad4d000 R08: 0000000000000009 R09: 0000000000001000 [ 29.220449] R10: 0000000000000812 R11: 0000000000000206 R12: 00005590927aaec0 [ 29.221374] R13: 00007ffc8c71fe10 R14: 00007ffc8c71fe40 R15: 00007ffc8c7201a0 [ 29.222309] [ 29.222632] [ 29.222869] Allocated by task 213: [ 29.223337] kasan_save_stack+0x22/0x50 [ 29.223900] kasan_set_track+0x25/0x30 [ 29.224439] __kasan_slab_alloc+0x59/0x70 [ 29.225021] kmem_cache_alloc+0x16b/0x370 [ 29.225584] vm_area_dup+0x20/0x160 [ 29.226079] __split_vma+0x170/0x950 [ 29.226589] split_vma+0xc6/0x110 [ 29.227070] mprotect_fixup+0x8d2/0xb30 [ 29.227628] do_mprotect_pkey+0x87e/0xd40 [ 29.228201] __x64_sys_mprotect+0x78/0xc0 [ 29.228766] do_syscall_64+0x3f/0x90 [ 29.229288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.229995] [ 29.230232] Freed by task 210: [ 29.230660] kasan_save_stack+0x22/0x50 [ 29.231207] kasan_set_track+0x25/0x30 [ 29.231766] kasan_save_free_info+0x2b/0x50 [ 29.232353] __kasan_slab_free+0x10a/0x190 [ 29.232942] kmem_cache_free+0x10d/0x4d0 [ 29.233499] rcu_core+0x8c8/0x2860 [ 29.233984] __do_softirq+0x1b7/0x7d4 [ 29.234508] [ 29.234741] Last potentially related work creation: [ 29.235384] kasan_save_stack+0x22/0x50 [ 29.235940] __kasan_record_aux_stack+0x8e/0xa0 [ 29.236565] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.237263] remove_vma+0x139/0x170 [ 29.237755] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.238367] do_vmi_munmap+0x1f1/0x2b0 [ 29.238902] __vm_munmap+0x138/0x3a0 [ 29.239416] __x64_sys_munmap+0x59/0x80 [ 29.239965] do_syscall_64+0x3f/0x90 [ 29.240487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.241171] [ 29.241399] The buggy address belongs to the object at ffff888018e8a740 [ 29.241399] which belongs to the cache vm_area_struct of size 168 [ 29.242949] The buggy address is located 88 bytes inside of [ 29.242949] freed 168-byte region [ffff888018e8a740, ffff888018e8a7e8) [ 29.244466] [ 29.244697] The buggy address belongs to the physical page: [ 29.245391] page:00000000dafe50fb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18e8a [ 29.246537] memcg:ffff888017e1a301 [ 29.246984] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.247669] page_type: 0xffffffff() [ 29.248143] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.249111] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017e1a301 [ 29.250080] page dumped because: kasan: bad access detected [ 29.250773] [ 29.251002] Memory state around the buggy address: [ 29.251645] ffff888018e8a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.252569] ffff888018e8a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.253489] >ffff888018e8a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.254398] ^ [ 29.254930] ffff888018e8a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.255852] ffff888018e8a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.256755] ================================================================== [ 29.257931] Disabling lock debugging due to kernel taint [ 31.302243] BUG: Bad rss-counter state mm:000000008e8d840d type:MM_FILEPAGES val:33 [ 31.303444] BUG: Bad rss-counter state mm:000000008e8d840d type:MM_ANONPAGES val:22 [ 31.672789] BUG: Bad rss-counter state mm:000000001528e187 type:MM_FILEPAGES val:33 [ 31.673582] BUG: Bad rss-counter state mm:000000001528e187 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18299' (ECDSA) to the list of known hosts. 2023/06/21 08:45:00 fuzzer started 2023/06/21 08:45:01 dialing manager at localhost:36067 2023/06/21 08:45:01 checking machine... 2023/06/21 08:45:01 checking revisions... [ 32.439889] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:45:01 testing simple program... [ 32.499068] cgroup: Unknown subsys name 'net' [ 32.587801] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:45:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800f3afd80 RCX=0000000000000000 RDX=ffff8880160d1b40 RSI=ffffffff8387284d RDI=0000000000000005 RBP=0000000000000014 RSP=ffff88800f3afbe0 R8 =0000000000000005 R9 =0000000000000000 R10=000000000000001a R11=000008d8000008d8 R12=0000000000000014 R13=0000000000000014 R14=0000000000000000 R15=ffff88800feb6000 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 00007fc6e0ceb900 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=00007fc6e12a2618 CR3=000000001ca24000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fc6fa80bdc0 CR3=000000000b364000 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=2030303a35343a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a35343a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000