syzkaller login: [ 42.106730] BUG: Bad rss-counter state mm:0000000021588e7f type:MM_FILEPAGES val:33 [ 42.107942] BUG: Bad rss-counter state mm:0000000021588e7f type:MM_ANONPAGES val:22 [ 42.146655] ================================================================== [ 42.147592] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.148593] Read of size 8 at addr ffff88800c6283f8 by task sshd/220 [ 42.149423] [ 42.149663] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.150646] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.151642] Call Trace: [ 42.151986] [ 42.152279] dump_stack_lvl+0x91/0xf0 [ 42.152773] print_report+0xcc/0x620 [ 42.153282] ? __virt_addr_valid+0x102/0x340 [ 42.153897] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.154606] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.155162] kasan_report+0xbe/0xf0 [ 42.155678] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.156357] vma_interval_tree_remove+0xc75/0xec0 [ 42.156957] vma_prepare+0xc54/0x11a0 [ 42.157471] __split_vma+0x5af/0x950 [ 42.157914] ? __pfx___split_vma+0x10/0x10 [ 42.158521] ? find_held_lock+0x2c/0x110 [ 42.159133] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.159805] ? lock_is_held_type+0x9f/0x120 [ 42.160503] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.161261] ? mtree_range_walk+0x632/0x900 [ 42.161928] ? mas_walk+0x5c7/0x7c0 [ 42.162443] do_vmi_munmap+0x1f1/0x2b0 [ 42.163149] mmap_region+0x1f9/0x2660 [ 42.163791] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.164347] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.165115] ? __pfx_lock_acquire+0x10/0x10 [ 42.165769] ? __pfx_mmap_region+0x10/0x10 [ 42.166402] ? security_mmap_addr+0x7d/0xa0 [ 42.167031] ? get_unmapped_area+0x1f5/0x3f0 [ 42.167534] do_mmap+0x854/0xf00 [ 42.168078] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.168646] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.169335] ksys_mmap_pgoff+0x3af/0x500 [ 42.169879] do_syscall_64+0x3f/0x90 [ 42.170417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.171067] RIP: 0033:0x7f7dde090d82 [ 42.171553] 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 [ 42.173718] RSP: 002b:00007ffe8d9b71d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.174548] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7dde090d82 [ 42.175316] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7ddd4ca000 [ 42.176083] RBP: 00007f7ddd4ca000 R08: 0000000000000009 R09: 0000000000001000 [ 42.176859] R10: 0000000000000812 R11: 0000000000000206 R12: 00005627b32dcd90 [ 42.177641] R13: 00007ffe8d9b71f0 R14: 00007ffe8d9b7220 R15: 00007ffe8d9b7580 [ 42.178420] [ 42.178683] [ 42.178877] Allocated by task 213: [ 42.179271] kasan_save_stack+0x22/0x50 [ 42.179725] kasan_set_track+0x25/0x30 [ 42.180162] __kasan_slab_alloc+0x59/0x70 [ 42.180656] kmem_cache_alloc+0x16b/0x370 [ 42.181118] vm_area_dup+0x20/0x160 [ 42.181553] __split_vma+0x170/0x950 [ 42.181971] split_vma+0xc6/0x110 [ 42.182400] mprotect_fixup+0x8d2/0xb30 [ 42.182846] do_mprotect_pkey+0x87e/0xd40 [ 42.183349] __x64_sys_mprotect+0x78/0xc0 [ 42.183930] do_syscall_64+0x3f/0x90 [ 42.184435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.185103] [ 42.185308] Freed by task 213: [ 42.185665] kasan_save_stack+0x22/0x50 [ 42.186119] kasan_set_track+0x25/0x30 [ 42.186570] kasan_save_free_info+0x2b/0x50 [ 42.187039] __kasan_slab_free+0x10a/0x190 [ 42.187541] kmem_cache_free+0x10d/0x4d0 [ 42.187990] rcu_core+0x8c8/0x2860 [ 42.188399] __do_softirq+0x1b7/0x7d4 [ 42.188832] [ 42.189022] Last potentially related work creation: [ 42.189612] kasan_save_stack+0x22/0x50 [ 42.190072] __kasan_record_aux_stack+0x8e/0xa0 [ 42.190601] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.191174] remove_vma+0x139/0x170 [ 42.191578] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.192186] do_vmi_munmap+0x1f1/0x2b0 [ 42.192625] __vm_munmap+0x138/0x3a0 [ 42.193045] __x64_sys_munmap+0x59/0x80 [ 42.193513] do_syscall_64+0x3f/0x90 [ 42.193961] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.194542] [ 42.194735] Second to last potentially related work creation: [ 42.195364] kasan_save_stack+0x22/0x50 [ 42.195815] __kasan_record_aux_stack+0x8e/0xa0 [ 42.196344] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.196935] remove_vma+0x139/0x170 [ 42.197346] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.197870] do_vmi_munmap+0x1f1/0x2b0 [ 42.198308] __vm_munmap+0x138/0x3a0 [ 42.198726] elf_map+0x26f/0x310 [ 42.199128] load_elf_binary+0x3417/0x5030 [ 42.199606] bprm_execve+0x803/0x1940 [ 42.200036] do_execveat_common+0x734/0x8e0 [ 42.200516] __x64_sys_execve+0x93/0xc0 [ 42.200954] do_syscall_64+0x3f/0x90 [ 42.201380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.201979] [ 42.202173] The buggy address belongs to the object at ffff88800c6283a0 [ 42.202173] which belongs to the cache vm_area_struct of size 168 [ 42.203512] The buggy address is located 88 bytes inside of [ 42.203512] freed 168-byte region [ffff88800c6283a0, ffff88800c628448) [ 42.204775] [ 42.204967] The buggy address belongs to the physical page: [ 42.205571] page:00000000de27fe79 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc628 [ 42.206554] memcg:ffff88800d3d1f01 [ 42.206937] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 42.207557] page_type: 0xffffffff() [ 42.207962] raw: 0100000000000200 ffff88800879fc80 ffffea00003c5940 dead000000000005 [ 42.208796] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3d1f01 [ 42.209619] page dumped because: kasan: bad access detected [ 42.210213] [ 42.210407] Memory state around the buggy address: [ 42.210954] ffff88800c628280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 42.211726] ffff88800c628300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 42.212502] >ffff88800c628380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 42.213294] ^ [ 42.214084] ffff88800c628400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 42.214898] ffff88800c628480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.215695] ================================================================== [ 42.216677] Disabling lock debugging due to kernel taint [ 44.168369] BUG: Bad rss-counter state mm:000000003a2dc8c2 type:MM_FILEPAGES val:33 [ 44.169931] BUG: Bad rss-counter state mm:000000003a2dc8c2 type:MM_ANONPAGES val:22 [ 44.710190] BUG: Bad rss-counter state mm:00000000c8a04606 type:MM_FILEPAGES val:33 [ 44.711194] BUG: Bad rss-counter state mm:00000000c8a04606 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27670' (ECDSA) to the list of known hosts. 2023/06/20 06:00:05 fuzzer started 2023/06/20 06:00:05 dialing manager at localhost:44161 2023/06/20 06:00:05 checking machine... 2023/06/20 06:00:05 checking revisions... [ 45.375413] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:00:05 testing simple program... [ 45.422672] cgroup: Unknown subsys name 'net' [ 45.470124] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:00:01 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000001 RCX=ffffffff83640960 RDX=0000000000026409 RSI=0000000000026409 RDI=ffffffff86580be4 RBP=ffff888019bd76d8 RSP=ffff888019bd7610 R8 =0000000000000000 R9 =ffff888019bd76c0 R10=0000000000038001 R11=000000000008aa86 R12=ffff888019bd76e0 R13=ffff888019bd76c8 R14=ffff888019bd76c1 R15=ffff888019bd7680 RIP=ffffffff8113078b 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 00007f8a19fd9900 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=00007fff77b23000 CR3=000000001023c000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f73e47ca040 CR3=000000000d7b4000 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=83ef851a2ae0ab8cc64b93eaf1744eff XMM02=000000000011d0b8eff9b2d0a8fce9cb XMM03=000000000011d1882c67c8bc2e329bc3 XMM04=0ab4878cabac3ddc00000000000ae988 XMM05=19e9129bd510f2350000000000134a50 XMM06=ef635057edaab9450000000000133c28 XMM07=e042d86d42eb936e0000000000123d68 XMM08=b928432a25788ff0000000000011d188 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000