syzkaller login: [ 40.994402] BUG: Bad rss-counter state mm:00000000314dec1b type:MM_FILEPAGES val:33 [ 40.995563] BUG: Bad rss-counter state mm:00000000314dec1b type:MM_ANONPAGES val:22 [ 41.144078] ================================================================== [ 41.145054] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.146002] Read of size 8 at addr ffff8880169033f8 by task sshd/230 [ 41.146862] [ 41.147117] CPU: 1 PID: 230 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.147978] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.148996] Call Trace: [ 41.149341] [ 41.149625] dump_stack_lvl+0x91/0xf0 [ 41.150121] print_report+0xcc/0x620 [ 41.150614] ? __virt_addr_valid+0x102/0x340 [ 41.151174] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.151804] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.152444] kasan_report+0xbe/0xf0 [ 41.152931] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.153576] vma_interval_tree_remove+0xc75/0xec0 [ 41.154187] vma_prepare+0xc54/0x11a0 [ 41.154674] __split_vma+0x5af/0x950 [ 41.155150] ? __pfx___split_vma+0x10/0x10 [ 41.155683] ? find_held_lock+0x2c/0x110 [ 41.156210] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.156790] ? lock_is_held_type+0x9f/0x120 [ 41.157341] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.157959] ? mtree_range_walk+0x632/0x900 [ 41.158513] ? mas_walk+0x5c7/0x7c0 [ 41.158984] do_vmi_munmap+0x1f1/0x2b0 [ 41.159475] mmap_region+0x1f9/0x2660 [ 41.159960] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.160495] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.161219] ? __pfx_lock_acquire+0x10/0x10 [ 41.161755] ? __pfx_mmap_region+0x10/0x10 [ 41.162284] ? security_mmap_addr+0x7d/0xa0 [ 41.162823] ? get_unmapped_area+0x1f5/0x3f0 [ 41.163377] do_mmap+0x854/0xf00 [ 41.163817] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.164320] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.164887] ksys_mmap_pgoff+0x3af/0x500 [ 41.165389] do_syscall_64+0x3f/0x90 [ 41.165864] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.166526] RIP: 0033:0x7f94dec51d82 [ 41.166998] 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 [ 41.169266] RSP: 002b:00007ffc22686128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.170229] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f94dec51d82 [ 41.171127] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f94de08b000 [ 41.172025] RBP: 00007f94de08b000 R08: 0000000000000009 R09: 0000000000001000 [ 41.172945] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562c43d94d90 [ 41.173824] R13: 00007ffc22686140 R14: 00007ffc22686170 R15: 00007ffc226864d0 [ 41.174723] [ 41.175032] [ 41.175261] Allocated by task 223: [ 41.175716] kasan_save_stack+0x22/0x50 [ 41.176245] kasan_set_track+0x25/0x30 [ 41.176772] __kasan_slab_alloc+0x59/0x70 [ 41.177326] kmem_cache_alloc+0x16b/0x370 [ 41.177884] vm_area_dup+0x20/0x160 [ 41.178365] __split_vma+0x170/0x950 [ 41.178859] split_vma+0xc6/0x110 [ 41.179328] mprotect_fixup+0x8d2/0xb30 [ 41.179874] do_mprotect_pkey+0x87e/0xd40 [ 41.180453] __x64_sys_mprotect+0x78/0xc0 [ 41.181001] do_syscall_64+0x3f/0x90 [ 41.181497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.182171] [ 41.182401] Freed by task 223: [ 41.182815] kasan_save_stack+0x22/0x50 [ 41.183347] kasan_set_track+0x25/0x30 [ 41.183857] kasan_save_free_info+0x2b/0x50 [ 41.184429] __kasan_slab_free+0x10a/0x190 [ 41.184991] kmem_cache_free+0x10d/0x4d0 [ 41.185545] rcu_core+0x8c8/0x2860 [ 41.186024] __do_softirq+0x1b7/0x7d4 [ 41.186534] [ 41.186760] Last potentially related work creation: [ 41.187371] kasan_save_stack+0x22/0x50 [ 41.187981] __kasan_record_aux_stack+0x8e/0xa0 [ 41.188610] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.189289] remove_vma+0x139/0x170 [ 41.189768] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.190346] do_vmi_munmap+0x1f1/0x2b0 [ 41.190852] __vm_munmap+0x138/0x3a0 [ 41.191345] __x64_sys_munmap+0x59/0x80 [ 41.191873] do_syscall_64+0x3f/0x90 [ 41.192384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.193064] [ 41.193296] The buggy address belongs to the object at ffff8880169033a0 [ 41.193296] which belongs to the cache vm_area_struct of size 168 [ 41.194859] The buggy address is located 88 bytes inside of [ 41.194859] freed 168-byte region [ffff8880169033a0, ffff888016903448) [ 41.196354] [ 41.196581] The buggy address belongs to the physical page: [ 41.197288] page:00000000c547fd6b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16903 [ 41.198442] memcg:ffff888008ecfc01 [ 41.198887] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.199575] page_type: 0xffffffff() [ 41.200056] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.201045] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008ecfc01 [ 41.201964] page dumped because: kasan: bad access detected [ 41.202649] [ 41.202871] Memory state around the buggy address: [ 41.203475] ffff888016903280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 41.204381] ffff888016903300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 41.205256] >ffff888016903380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 41.206107] ^ [ 41.206944] ffff888016903400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 41.207809] ffff888016903480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.208668] ================================================================== [ 41.209673] Disabling lock debugging due to kernel taint [ 43.640168] BUG: Bad rss-counter state mm:0000000035ded039 type:MM_FILEPAGES val:33 [ 43.641424] BUG: Bad rss-counter state mm:0000000035ded039 type:MM_ANONPAGES val:22 [ 44.060675] BUG: Bad rss-counter state mm:00000000b506cc24 type:MM_FILEPAGES val:33 [ 44.061822] BUG: Bad rss-counter state mm:00000000b506cc24 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62805' (ECDSA) to the list of known hosts. 2023/06/19 17:12:54 fuzzer started 2023/06/19 17:12:54 dialing manager at localhost:44161 2023/06/19 17:12:54 checking machine... 2023/06/19 17:12:54 checking revisions... [ 44.617216] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:12:54 testing simple program... [ 44.668332] cgroup: Unknown subsys name 'net' [ 44.733405] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:12:51 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002ffbe9e RSI=ffffffff846000aa RDI=ffff888017fdf560 RBP=ffff888017fdf530 RSP=ffff888017fdf490 R8 =0000000000000001 R9 =ffff888017fdf4d8 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff888017fdf560 R13=0000000000000000 R14=ffff8880165bb680 R15=0000000000000cc0 RIP=ffffffff813ad42e RFL=00000286 [--S--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 00007fee52446900 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=00007ffc47682000 CR3=000000001a2ca000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85d793d8 RCX=ffffffff810001cd RDX=0000000000000000 RSI=ffffffff860723cc RDI=ffffffff85d793d4 RBP=ffffffff85d793d8 RSP=ffff88806cf099e0 R8 =ffffffff860723cc R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000000000 R12=ffffffff85d793d8 R13=ffffffff85d793d4 R14=ffffffff85d793d4 R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000256 [---ZAP-] 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 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=00007fc1c4e2b240 CR3=0000000015a2a000 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=2033353a32313a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3933 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3933325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a32313a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000