syzkaller login: [ 32.930527] BUG: Bad rss-counter state mm:000000008db1a608 type:MM_FILEPAGES val:33 [ 32.931595] BUG: Bad rss-counter state mm:000000008db1a608 type:MM_ANONPAGES val:22 [ 33.110201] ================================================================== [ 33.111153] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.112137] Read of size 8 at addr ffff88800d9c2b38 by task sshd/221 [ 33.112941] [ 33.113260] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.114179] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.115209] Call Trace: [ 33.115566] [ 33.115863] dump_stack_lvl+0x91/0xf0 [ 33.116390] print_report+0xcc/0x620 [ 33.116899] ? __virt_addr_valid+0x102/0x340 [ 33.117492] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.118145] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.118794] kasan_report+0xbe/0xf0 [ 33.119295] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.119972] vma_interval_tree_remove+0xc75/0xec0 [ 33.120627] vma_prepare+0xc54/0x11a0 [ 33.121156] __split_vma+0x5af/0x950 [ 33.121666] ? __pfx___split_vma+0x10/0x10 [ 33.122242] ? find_held_lock+0x2c/0x110 [ 33.122810] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.123418] ? lock_is_held_type+0x9f/0x120 [ 33.124002] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.124663] ? mtree_range_walk+0x632/0x900 [ 33.125288] ? mas_walk+0x5c7/0x7c0 [ 33.125801] do_vmi_munmap+0x1f1/0x2b0 [ 33.126339] mmap_region+0x1f9/0x2660 [ 33.126866] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.127430] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.128202] ? __pfx_lock_acquire+0x10/0x10 [ 33.128781] ? __pfx_mmap_region+0x10/0x10 [ 33.129366] ? security_mmap_addr+0x7d/0xa0 [ 33.129943] ? get_unmapped_area+0x1f5/0x3f0 [ 33.130538] do_mmap+0x854/0xf00 [ 33.131009] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.131544] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.132148] ksys_mmap_pgoff+0x3af/0x500 [ 33.132701] do_syscall_64+0x3f/0x90 [ 33.133234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.133935] RIP: 0033:0x7f6a399ead82 [ 33.134434] 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 [ 33.136750] RSP: 002b:00007fffac595df8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.137756] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6a399ead82 [ 33.138676] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6a38e24000 [ 33.139598] RBP: 00007f6a38e24000 R08: 0000000000000009 R09: 0000000000001000 [ 33.140517] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d9144caec0 [ 33.141444] R13: 00007fffac595e10 R14: 00007fffac595e40 R15: 00007fffac5961a0 [ 33.142385] [ 33.142699] [ 33.142932] Allocated by task 214: [ 33.143398] kasan_save_stack+0x22/0x50 [ 33.143955] kasan_set_track+0x25/0x30 [ 33.144499] __kasan_slab_alloc+0x59/0x70 [ 33.145100] kmem_cache_alloc+0x16b/0x370 [ 33.145661] vm_area_dup+0x20/0x160 [ 33.146154] __split_vma+0x170/0x950 [ 33.146659] split_vma+0xc6/0x110 [ 33.147137] mprotect_fixup+0x8d2/0xb30 [ 33.147681] do_mprotect_pkey+0x87e/0xd40 [ 33.148249] __x64_sys_mprotect+0x78/0xc0 [ 33.148817] do_syscall_64+0x3f/0x90 [ 33.149339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.150035] [ 33.150273] Freed by task 214: [ 33.150697] kasan_save_stack+0x22/0x50 [ 33.151251] kasan_set_track+0x25/0x30 [ 33.151788] kasan_save_free_info+0x2b/0x50 [ 33.152368] __kasan_slab_free+0x10a/0x190 [ 33.152945] kmem_cache_free+0x10d/0x4d0 [ 33.153519] rcu_core+0x8c8/0x2860 [ 33.154002] __do_softirq+0x1b7/0x7d4 [ 33.154523] [ 33.154757] Last potentially related work creation: [ 33.155392] kasan_save_stack+0x22/0x50 [ 33.155938] __kasan_record_aux_stack+0x8e/0xa0 [ 33.156559] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.157268] remove_vma+0x139/0x170 [ 33.157760] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.158371] do_vmi_munmap+0x1f1/0x2b0 [ 33.158894] __vm_munmap+0x138/0x3a0 [ 33.159400] __x64_sys_munmap+0x59/0x80 [ 33.159940] do_syscall_64+0x3f/0x90 [ 33.160455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.161159] [ 33.161391] Second to last potentially related work creation: [ 33.162132] kasan_save_stack+0x22/0x50 [ 33.162682] __kasan_record_aux_stack+0x8e/0xa0 [ 33.163306] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.164006] remove_vma+0x139/0x170 [ 33.164496] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.165146] do_vmi_munmap+0x1f1/0x2b0 [ 33.165717] __vm_munmap+0x138/0x3a0 [ 33.166227] elf_map+0x26f/0x310 [ 33.166714] load_elf_binary+0xd82/0x5030 [ 33.167288] bprm_execve+0x803/0x1940 [ 33.167797] do_execveat_common+0x734/0x8e0 [ 33.168366] __x64_sys_execve+0x93/0xc0 [ 33.168902] do_syscall_64+0x3f/0x90 [ 33.169425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.170121] [ 33.170356] The buggy address belongs to the object at ffff88800d9c2ae0 [ 33.170356] which belongs to the cache vm_area_struct of size 168 [ 33.171955] The buggy address is located 88 bytes inside of [ 33.171955] freed 168-byte region [ffff88800d9c2ae0, ffff88800d9c2b88) [ 33.173490] [ 33.173724] The buggy address belongs to the physical page: [ 33.174442] page:00000000661e9b98 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9c2 [ 33.175624] memcg:ffff88800d7c3601 [ 33.176087] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.176792] page_type: 0xffffffff() [ 33.177299] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 33.178303] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7c3601 [ 33.179298] page dumped because: kasan: bad access detected [ 33.180019] [ 33.180260] Memory state around the buggy address: [ 33.180892] ffff88800d9c2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.181833] ffff88800d9c2a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 33.182764] >ffff88800d9c2b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.183692] ^ [ 33.184357] ffff88800d9c2b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.185296] ffff88800d9c2c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.186224] ================================================================== [ 33.187288] Disabling lock debugging due to kernel taint [ 35.420765] BUG: Bad rss-counter state mm:00000000ef77db67 type:MM_FILEPAGES val:33 [ 35.421588] BUG: Bad rss-counter state mm:00000000ef77db67 type:MM_ANONPAGES val:22 [ 35.903067] BUG: Bad rss-counter state mm:000000008440e5f9 type:MM_FILEPAGES val:33 [ 35.904399] BUG: Bad rss-counter state mm:000000008440e5f9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61449' (ECDSA) to the list of known hosts. 2023/06/20 00:35:35 fuzzer started 2023/06/20 00:35:35 dialing manager at localhost:44161 2023/06/20 00:35:35 checking machine... 2023/06/20 00:35:35 checking revisions... [ 36.671613] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:35:35 testing simple program... [ 36.719611] cgroup: Unknown subsys name 'net' [ 36.770830] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:35:32 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f74c1292710 CR3=000000000cd02000 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=c78b1a7b324a2789f242d21ebe57f4fd XMM02=ec2efd57dc4c00df000000000011cdb0 XMM03=b4726a8d98d55393000000000011ce80 XMM04=8b9cfcdae532055600000000000ae988 XMM05=e4cb8bb95a7664b60000000000135978 XMM06=54b9e2fbaafd2f4300000000001347e0 XMM07=e042d86d42eb936e0000000000124948 XMM08=b4726a8d98d55393000000000011ce80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff83c632d1 RDX=ffff888016611b40 RSI=000000000000007d RDI=00000000000000ff RBP=0000000000000000 RSP=ffff8880168476a0 R8 =0000000000000005 R9 =00000000000000ff R10=000000000000007c R11=000009e7000009e7 R12=0000000000000000 R13=000000000000007d R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c0388 RFL=00000206 [-----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 00007f6247167900 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=00007ffcc1451000 CR3=000000000e7ac000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000