syzkaller login: [ 36.951244] BUG: Bad rss-counter state mm:00000000762b217a type:MM_FILEPAGES val:33 [ 36.952244] BUG: Bad rss-counter state mm:00000000762b217a type:MM_ANONPAGES val:22 [ 37.117946] ================================================================== [ 37.119037] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.120166] Read of size 8 at addr ffff88800ef46880 by task sshd/218 [ 37.121194] [ 37.121476] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.122522] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.123758] Call Trace: [ 37.124159] [ 37.124498] dump_stack_lvl+0x91/0xf0 [ 37.125091] print_report+0xcc/0x620 [ 37.125666] ? __virt_addr_valid+0x102/0x340 [ 37.126330] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.127090] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.127834] kasan_report+0xbe/0xf0 [ 37.128416] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.129171] vma_interval_tree_remove+0xc75/0xec0 [ 37.129899] vma_prepare+0xc54/0x11a0 [ 37.130482] __split_vma+0x5af/0x950 [ 37.131074] ? __pfx___split_vma+0x10/0x10 [ 37.131719] ? find_held_lock+0x2c/0x110 [ 37.132353] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.133051] ? lock_is_held_type+0x9f/0x120 [ 37.133713] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.134458] ? mtree_range_walk+0x632/0x900 [ 37.135154] ? mas_walk+0x5c7/0x7c0 [ 37.135731] do_vmi_munmap+0x1f1/0x2b0 [ 37.136336] mmap_region+0x1f9/0x2660 [ 37.136919] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.137536] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.138394] ? __pfx_lock_acquire+0x10/0x10 [ 37.139061] ? __pfx_mmap_region+0x10/0x10 [ 37.139711] ? security_mmap_addr+0x7d/0xa0 [ 37.140363] ? get_unmapped_area+0x1f5/0x3f0 [ 37.141030] do_mmap+0x854/0xf00 [ 37.141565] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.142176] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.142891] ksys_mmap_pgoff+0x3af/0x500 [ 37.143501] do_syscall_64+0x3f/0x90 [ 37.144075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.144852] RIP: 0033:0x7f72505aed82 [ 37.145415] 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 [ 37.147997] RSP: 002b:00007fff778cba18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.149095] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f72505aed82 [ 37.150135] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f724f9e8000 [ 37.151187] RBP: 00007f724f9e8000 R08: 0000000000000009 R09: 0000000000001000 [ 37.152222] R10: 0000000000000812 R11: 0000000000000206 R12: 000055840de97ec0 [ 37.153274] R13: 00007fff778cba30 R14: 00007fff778cba60 R15: 00007fff778cbdc0 [ 37.154331] [ 37.154707] [ 37.154967] Allocated by task 211: [ 37.155502] kasan_save_stack+0x22/0x50 [ 37.156115] kasan_set_track+0x25/0x30 [ 37.156713] __kasan_slab_alloc+0x59/0x70 [ 37.157345] kmem_cache_alloc+0x16b/0x370 [ 37.157982] vm_area_dup+0x20/0x160 [ 37.158532] __split_vma+0x170/0x950 [ 37.159111] split_vma+0xc6/0x110 [ 37.159634] mprotect_fixup+0x8d2/0xb30 [ 37.160245] do_mprotect_pkey+0x87e/0xd40 [ 37.160863] __x64_sys_mprotect+0x78/0xc0 [ 37.161377] do_syscall_64+0x3f/0x90 [ 37.161827] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.162434] [ 37.162648] Freed by task 209: [ 37.163025] kasan_save_stack+0x22/0x50 [ 37.163507] kasan_set_track+0x25/0x30 [ 37.163973] kasan_save_free_info+0x2b/0x50 [ 37.164481] __kasan_slab_free+0x10a/0x190 [ 37.164994] kmem_cache_free+0x10d/0x4d0 [ 37.165479] rcu_core+0x8c8/0x2860 [ 37.165895] __do_softirq+0x1b7/0x7d4 [ 37.166350] [ 37.166555] Last potentially related work creation: [ 37.167132] kasan_save_stack+0x22/0x50 [ 37.167610] __kasan_record_aux_stack+0x8e/0xa0 [ 37.168147] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.168764] remove_vma+0x139/0x170 [ 37.169194] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.169721] do_vmi_munmap+0x1f1/0x2b0 [ 37.170181] __vm_munmap+0x138/0x3a0 [ 37.170651] __x64_sys_munmap+0x59/0x80 [ 37.171153] do_syscall_64+0x3f/0x90 [ 37.171622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.172251] [ 37.172456] Second to last potentially related work creation: [ 37.173127] kasan_save_stack+0x22/0x50 [ 37.173625] __kasan_record_aux_stack+0x8e/0xa0 [ 37.174199] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.174843] remove_vma+0x139/0x170 [ 37.175281] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.175827] do_vmi_munmap+0x1f1/0x2b0 [ 37.176311] mmap_region+0x1f9/0x2660 [ 37.176777] do_mmap+0x854/0xf00 [ 37.177208] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.177690] ksys_mmap_pgoff+0x3af/0x500 [ 37.178184] do_syscall_64+0x3f/0x90 [ 37.178673] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.179314] [ 37.179526] The buggy address belongs to the object at ffff88800ef46828 [ 37.179526] which belongs to the cache vm_area_struct of size 168 [ 37.180961] The buggy address is located 88 bytes inside of [ 37.180961] freed 168-byte region [ffff88800ef46828, ffff88800ef468d0) [ 37.182345] [ 37.182552] The buggy address belongs to the physical page: [ 37.183211] page:000000003bcc02c1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef46 [ 37.184278] memcg:ffff88800ed9a601 [ 37.184694] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.185382] page_type: 0xffffffff() [ 37.185823] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 37.186745] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed9a601 [ 37.187633] page dumped because: kasan: bad access detected [ 37.188279] [ 37.188486] Memory state around the buggy address: [ 37.189066] ffff88800ef46780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 37.189904] ffff88800ef46800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 37.190772] >ffff88800ef46880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 37.191611] ^ [ 37.192015] ffff88800ef46900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.192857] ffff88800ef46980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 37.193683] ================================================================== [ 37.194661] Disabling lock debugging due to kernel taint [ 39.059017] BUG: Bad rss-counter state mm:00000000ed1d8284 type:MM_FILEPAGES val:33 [ 39.060068] BUG: Bad rss-counter state mm:00000000ed1d8284 type:MM_ANONPAGES val:22 [ 39.565147] BUG: Bad rss-counter state mm:00000000406274c0 type:MM_FILEPAGES val:33 [ 39.566159] BUG: Bad rss-counter state mm:00000000406274c0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26666' (ECDSA) to the list of known hosts. 2023/06/19 12:52:41 fuzzer started 2023/06/19 12:52:41 dialing manager at localhost:44161 2023/06/19 12:52:41 checking machine... 2023/06/19 12:52:41 checking revisions... [ 40.288896] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:52:41 testing simple program... [ 40.334483] cgroup: Unknown subsys name 'net' [ 40.393548] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:52:35 Registers: info registers vcpu 0 RAX=00005598ee121428 RBX=00007f3b64a5c0a0 RCX=0000000000000013 RDX=0000000000000040 RSI=0000000000000000 RDI=00005598ee121428 RBP=0000000000000001 RSP=00007fff88ffa878 R8 =00005598ee121428 R9 =ffffffffffffff01 R10=0000000000000002 R11=00005598ee120358 R12=00000000ffffffff R13=00007f3b64a56a20 R14=00005598ee162fe0 R15=0000000000000002 RIP=00007f3b64738ee0 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3b63e0b900 00000000 00000000 GS =0000 0000000000000000 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=00007f3b63218db0 CR3=000000000c5d8000 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=6c616e72756f6a2f676f6c2f6e75722f XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b5326bcc7fa5e71200000000000ae988 XMM05=f57aa37513feb3df0000000000136a20 XMM06=bdf2e299e47b49d500000000001354a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff863dc5f6 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88801771f3e0 RSP=ffff88801771f318 R8 =ffffffff863dc5fa R9 =ffff88801771f3c8 R10=0000000000038001 R11=0000000000091b07 R12=ffff88801771f3e8 R13=ffff88801771f3d0 R14=ffff88801771f3c9 R15=ffff88801771f388 RIP=ffffffff81130ad6 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 00007f2f65834900 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=00007ffccc047000 CR3=000000000e8d8000 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